TECHNICAL FIELD
[0001] The present disclosure relates to the field of optical fiber cable and, in particular, relates to a buffer tube for optical fiber cable.
BACKGROUND
[0002] Over the last few years, optical fiber cables have been increasingly employed for various industrial applications. These industrial applications include underground applications, indoor applications, outdoor application and various other applications. Traditionally, some of these optical fiber cables include a number of buffer tubes inside a core of these optical fiber cables. In addition, the buffer tubes enclose a plurality of optical fibers loosely held inside the buffer tubes and sometimes with fiber ribbon structure. The buffer tubes may or may not be filled with a water blocking gel. Further, these buffer tubes may be made from different materials.
[0003] The conventional easy strip buffer tube is made of thermoplastic elastomers. These buffer tubes have weak molecular bonding resulting in lack of resistance from Ultra Violet radiations. The conventional buffer tubes have poor physical stability under application of stresses. The existing buffer tubes lack in crush resistance.
[0004] In light of the foregoing discussion, there exists a need for a buffer tube for optical fiber cables which overcomes the above cited drawbacks of conventionally known buffer tubes.
Page 3 of 96
OBJECT OF THE DISCLOSURE
[0005] A primary object of the disclosure is to provide an optical fiber cable with at least one buffer tube which is UV resistant.
[0006] Another object of the present disclosure is to provide the optical fiber cable with the at least one buffer tube which is gel resistant.
[0007] Yet another object of the present disclosure is to provide the optical fiber cable with the at least one buffer tube which is crush resistant.
[0008] Yet another object of the present disclosure is to provide the optical fiber cable with the at least one buffer tube which has physical stability under application of stress.
Page 4 of 96
SUMMARY
[0009] In an aspect, the present disclosure provides an optical fiber cable. The optical fiber cable includes a plurality of optical fibers. The plurality of optical fibers lies substantially along a longitudinal axis of the optical fiber cable. In addition, the optical fiber cable includes a plurality of buffer tubes. The plurality of buffer tubes lies substantially along the longitudinal axis of the optical fiber cable and enclose the plurality of optical fibers. Moreover, the optical fiber cable includes a jacket. The jacket surrounds the plurality of buffer tubes. Each of the plurality of buffer tubes is made of Polyolefin based material. The Polyolefin based material is Low Smoke Zero Halogen material. The Polyolefin based material has a density of 1.4 grams per cubic centimetres at a temperature of about 23 degree Celsius. The Polyolefin based material has a hardness of 57 shore D per 15 seconds. The Polyolefin based material has water absorption of about 0.3 milligrams per square centimetres tested for 10 days at a temperature of 70 degree Celsius. The Polyolefin based material has a conductivity of 0.8 micro-Siemens per millimetre. The Polyolefin based material has elongation of 60 percent at a lower temperature of -20 degree Celsius.
[0010] In an embodiment of the present disclosure, the plurality of buffer tubes are tested using a device equipped with four 400 W medium pressure lamps. The medium pressure lamps have bulbs made of borosilicate glass which filters wavelengths below 295 nanometers. In addition, irradiance measured at surface of each of the plurality of buffer tubes is about 95 Wm2 in a range of 300 nanometers to 400 nanometers.
Page 5 of 96
Each buffer tube is fixed on a rotating carousel for homogeneous irradiation. The plurality of buffer tubes is exposed at a temperature of 60 degree Celsius.
[0011] In an embodiment of the present disclosure, the optical fiber cable further includes a central strength member. The central strength member is made of fiber reinforced plastic.
[0012] In an embodiment of the present disclosure, the optical fiber cable further includes one or more binder yarns between the plurality of buffer tubes and the first layer. The one or more binder yarns are made of a material selected from a group of polymers. The group consists of polyester, aramid and polypropylene.
[0013] In an embodiment of the present disclosure, the jacket is made of a material selected from a group of polymers. The group consists of medium density polyethylene, high density polyethylene and nylon.
[0014] In an embodiment of the present disclosure, the Polyolefin based material has a tensile strength of about 14 MPa.
[0015] In an embodiment of the present disclosure, the Polyolefin based material has 160 percent of elongation at break point.
[0016] In an embodiment of the present disclosure, the Polyolefin based material has a melt flow index of about 8 grams per 10 minutes under load of 21.6 kilograms at a temperature of 150 degree Celsius.
Page 6 of 96
[0017] In an embodiment of the present disclosure, the Polyolefin based material has elongation of 140 percent after ageing at 136 degrees Celsius for 10 days.
[0018] In an embodiment of the present disclosure, the polyolefin based material does not have fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
[0019] In an embodiment of the present disclosure, the Polyolefin based material has a limiting oxygen index of 34 percent.
Page 7 of 96
STATEMENT OF THE DISCLOSURE
[0020] The present disclosure relates to an optical fiber cable. The optical fiber cable includes a plurality of optical fibers. The plurality of optical fibers lies substantially along a longitudinal axis of the optical fiber cable. In addition, the optical fiber cable includes a plurality of buffer tubes. The plurality of buffer tubes lies substantially along the longitudinal axis of the optical fiber cable and enclose the plurality of optical fibers. Moreover, the optical fiber cable includes a jacket. The jacket surrounds the plurality of buffer tubes. Each of the plurality of buffer tubes is made of Polyolefin based material. The Polyolefin based material is Low Smoke Zero Halogen material. The Polyolefin based material has a density of 1.4 grams per cubic centimetres at a temperature of about 23 degree Celsius. The Polyolefin based material has a hardness of 57 shore D per 15 seconds. The Polyolefin based material has water absorption of about 0.3 milligrams per square centimetres tested for 10 days at a temperature of 70 degree Celsius. The Polyolefin based material has a conductivity of 0.8 micro-Siemens per millimetre. The Polyolefin based material has elongation of 60 percent at a lower temperature of -20 degree Celsius.
BRIEF DESCRIPTION OF FIGURES
[0021] Having thus described the disclosure in general terms, reference will now be made to the accompanying figures, wherein:
Page 8 of 96
[0022] FIG. 1 illustrates a cross sectional view of an exemplary optical fiber cable with buffer tubes, in accordance with an embodiment of the present disclosure; and
[0023] FIG. 2 illustrates a cross sectional view of a buffer tube of a plurality of buffer tubes, in accordance with various embodiments of the present disclosure;
[0024] FIG. 3 illustrates another optical fiber cable, in accordance with another embodiment of the present disclosure;
[0025] FIG. 4 illustrates yet another optical fiber cable, in accordance with yet another embodiment of the present disclosure; and
[0026] FIG. 5 illustrates yet another optical fiber cable, in accordance with yet another embodiment of the present disclosure.
[0027] It should be noted that the accompanying figures are intended to present illustrations of exemplary embodiments of the present disclosure. These figures are not intended to limit the scope of the present disclosure. It should also be noted that accompanying figures are not necessarily drawn to scale.
Page 9 of 96
DETAILED DESCRIPTION [0028] Reference will now be made in detail to selected embodiments of the present disclosure in conjunction with accompanying figures. The embodiments described herein are not intended to limit the scope of the disclosure, and the present disclosure should not be construed as limited to the embodiments described. This disclosure may be embodied in different forms without departing from the scope and spirit of the disclosure. It should be understood that the accompanying figures are intended and provided to illustrate embodiments of the disclosure described below and are not necessarily drawn to scale. In the drawings, like numbers refer to like elements throughout, and thicknesses and dimensions of some components may be exaggerated for providing better clarity and ease of understanding.
[0029] It should be noted that the terms "first", "second", and the like, herein do not denote any order, ranking, quantity, or importance, but rather are used to distinguish one element from another. Further, the terms "a" and "an" herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.
[0030] FIG. 1 illustrates a cross sectional view of an exemplary optical fiber cable 100 with buffer tubes, in accordance with various embodiments of the present disclosure. In addition, the FIG. 1 shows an arrangement of a plurality of buffer tubes inside the optical fiber cable 100. Moreover, the arrangement shows a utilization of the plurality of buffer tubes inside the optical fiber cable 100. The optical
Page 10 of 96
fiber cable 100 is a specific type of optical fiber cable with a plurality of layers. In an embodiment of the present disclosure, the buffer tubes can be used inside any type of optical fiber cable with more or less number of layers.
[0031] The type of optical fiber cable includes loose tube buffered cable, tight buffered cable, hybrid cable, optical fiber ribbon cable and other types of cables known in the art. Each of the optical fiber cable is used for a variety of applications. In an example, the optical fiber cable may be used for installation in micro-ducts. In another example, the optical fiber cable is used for distribution in homes, offices and the like. In yet another example, the optical fiber cable is used for riser and plenum applications. In addition, the optical fiber cable 100 may be used for a specific type of application from the variety of applications. In an example, the optical fiber cable 100 is used for indoor applications and outdoor applications.
[0032] The optical fiber cable 100 is made of a plurality of layers (mentioned below in the patent application). The plurality of layers encloses a plurality of buffer tubes. Each buffer tube of the plurality of buffer tubes encloses a plurality of optical fibers. In an embodiment of the present disclosure, the plurality of optical fibers is loosely held inside the plurality of buffer tubes.
[0033] Going further, the optical fiber cable 100 includes a central strength member 102, a plurality of buffer tubes 104a-104e, a first layer 108 and a second layer 110. In addition, the optical fiber cable 100
Page 11 of 96
includes a third layer 112. The plurality of buffer tubes 104a-104e includes a plurality of optical fibres 106a-106e. In an embodiment of the present disclosure, the plurality of buffer tubes 104a-104e can be placed inside any type of optical fiber cable with any number of layers around the plurality of buffer tubes 104a-104e. The optical fiber cable 100 is used to transmit optical signals (which may carry sensor data or communication data).
[0034] In an embodiment of the present disclosure, the central strength member 102 lies substantially along a longitudinal axis 114 of the optical fiber cable 100. The central strength member 102 may be coated with a layer of polyethylene. The central strength member 102 may be coated with any suitable material. In an example, the material includes but not be limited to high density polyethylene, medium density polyethylene and polypropylene. The central strength member 102 has a circular cross-section. The central strength member 102 is made of a composite material having a polymer matrix. The composite material is flexible fiber reinforced plastic. The central strength member 102 may not be coated.
[0035] The fiber reinforced plastic is a composite material having a polymer matrix reinforced with glass fibers. Examples of the fiber reinforced plastics include glass fibers, carbon fibers, aramid fibers, basalt fibers and the like. The central strength member 102 is made of any suitable material. Moreover, the central strength member 102 provides physical strength to the optical fiber cable 100 and resists over bending of the optical fiber cable 100. The central strength member 102
Page 12 of 96
provides tensile strength to the optical fiber cable 100. The tensile strength corresponds to a resistance shown by the optical fiber cable 100 against buckling. The central strength member 102 is characterized by a diameter measured along the cross section. In an example, the diameter of the central strength member 102 is 2.2 millimetres. In an embodiment of the present disclosure, the diameter of the central strength member 102 may vary based on different fiber counts and design. Also, the central strength member 102 prevents buckling of the optical fiber cable 100. In another embodiment of the present disclosure, the optical fiber cable 100 may not include the central strength member 102.
[0036] The buffer tube 104a of the plurality of buffer tubes 104a-104e is shown in FIG. 2. The buffer tube 104a includes plurality of fibres 106a, gel 202 and an outer layer 204. All the buffer tubes 104a-104e is identical in shape, structure and design. The buffer tube 104a is made of a Polyolefin based material. The material used for the plurality of buffer tubes 104a-104e is characterized by a plurality of physical properties. The plurality of physical properties of the material include density, hardness, conductivity, tensile strength, melt flow index, elongation at break and water absorption. In addition, the plurality of physical properties includes elongation after aging, elongation at low temperature and tensile strength after aging.
[0037] The Polyolefin based material has a density of 1.4 grams per cubic centimeters at a temperature of 23 degree Celsius. Hardness is defined as a resistance of the material towards permanent indentation.
Page 13 of 96
The Polyolefin based material has a hardness of 57 shore D per 15 seconds. The tensile strength of the material corresponds to how much stress the material can endure before failure. In an embodiment of the present disclosure, the Polyolefin based material has a tensile strength of about 14 MPa. Elongation at break refers to capability of a material to resist changes of shape without crack formation. In an embodiment of the present disclosure, the Polyolefin based material has 160 percent of elongation at break. The melt flow index of the material is a measure of mass of polymer in grams flowing in 10 minutes through a standardized capillary in terms of diameter and length by pressure applied via prescribed alternative gravimetric weights for alternative prescribed temperatures. . In an embodiment of the present disclosure, the Polyolefin based material has a melt flow index of about 8 grams per 10 minutes at a temperature of 150 degree Celsius under load of 21.6 kilograms. The water absorption refers to an amount of water that can be absorbed by the material under specific conditions. The Polyolefin based material has water absorption of about 0.3 milligrams per square centimetre tested for 10 days at a temperature of 70 degree Celsius. The Polyolefin based material has 140 percent of elongation after aging. The Polyolefin based material has 60 percent of elongation at a low temperature of -20 degree Celsius. The Polyolefin based material has the conductivity of 0.8 micro-Siemens per millimetre. The Polyolefin based material is UV resistant and gel resistant.
[0038] The material used for the buffer tube undergoes one or more flammability tests. The one or more flammability tests are performed to check a limiting oxygen index, halogen content, pH and conductivity of
Page 14 of 96
the material. The Polyolefin based material has the limiting oxygen index of 34 percent. The limiting oxygen index refers to a minimum concentration of oxygen which supports combustion of a polymer. The material has the halogen content of 0 percent. In addition, the material has a pH of at least 4.5. Moreover, the material has a conductivity of 0.8 micro-Siemens per millimeter. In an embodiment of the present disclosure, the polyolefin based material does not have fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
[0039] The buffer tube 104a includes plurality of optical fibers 106a. The optical fibers are loosely arranged inside the buffer tube 104a. The optical fibers can be tightly arranged inside the buffer tube 104a. The plurality of buffer tubes 104a-104e can be a dry buffer tube or a gel type buffer tube. The gel 202 is used to replace the spaces inside the buffer tube. A thixotropic gel can be used to completely fill the empty space inside the buffer tube. Virtually, there are no free spaces, gel is dispersed in the bunch of fibres. The buffer tubes of the plurality of buffer tubes 104a-104e are UV (Mercury Lamp) resistant. The buffer tube of the plurality of buffer tubes 104a-104e can be stripped easily. The buffer tube of the plurality of buffer tubes 104a-104e can be stripped merely using the fingers without the need of any special tool. The buffer tube of the plurality of buffer tubes 104a-104e is gel resistant. The buffer tube of the plurality of buffer tubes 104a-104e has good physical stability under application of stress. The buffer tube of the plurality of buffer tubes 104a-104e has crush resistance properties. The change in elongation at break of the buffer tube of the plurality of
Page 15 of 96
buffer tubes 104a-104e is maximum of 30% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Further, the tensile strength of the buffer tube of the plurality of buffer tubes 104a-104e is maximum of 20% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0040] The buffer tube is characterized by a diameter. Each of the plurality of buffer tubes 104a-104e is characterized by a first diameter and a second diameter. The first diameter of the plurality of buffer tubes 104a-104e is an inner diameter of the plurality of buffer tubes 104a-104e. The second diameter of the plurality of buffer tubes 104a-104e is an outer diameter of the plurality of buffer tubes 104a-104e. In an embodiment of the present disclosure, the buffer tube with two optical fibers has an inner diameter of 0.65 mm and outer diameter of 0.9 mm. The buffer tube with four optical fibers has an inner diameter of 0.65 mm and outer diameter of 0.9 mm. The buffer tube with six optical fibers has an inner diameter of 0.85 mm and outer diameter of 1.1 mm. The buffer tube with eight optical fibers has an inner diameter of 0.95 mm and outer diameter of 1.2 mm. The buffer tube with twelve optical fibers has an inner diameter of 1.05 mm and outer diameter of 1.3 mm. The buffer tube with twenty four optical fibers has an inner diameter of 1.5 mm and an outer diameter of 1.75 mm.
[0041] Going further, the plurality of buffer tubes 104a-104e encloses the plurality of optical fibers 106a-106e. In an embodiment of the present disclosure, the plurality of optical fibers 106a-106e is positioned at a center of each of the plurality of buffer tubes 104a-104e. In an
Page 16 of 96
example, each of the plurality of buffer tubes 104a-104e encloses 2 optical fibers. In an example, each of the plurality of buffer tubes 104a-104e encloses 4 optical fibers. In an example, each of the plurality of buffer tubes 104a-104e encloses 6 optical fibers. In an example, each of the plurality of buffer tubes 104a-104e encloses 12 optical fibers. In an example, each of the plurality of buffer tubes 104a-104e encloses 24 optical fibers. In an embodiment of the present disclosure, each of the plurality of buffer tubes 104a-104e may enclose any number of optical fibers. In an embodiment of the present disclosure, each of the plurality of buffer tubes 104a-104e may enclose different number of optical fibers. Each of the plurality of buffer tubes 104a-104eis a tube for encapsulating the plurality of optical fibers 106a-106e. The plurality of buffer tubes 104a-104e provides support and protection to each of the plurality of optical fibers 106a-106e against crush.
[0042] In an embodiment of the present disclosure, each of the plurality of buffer tubes 104a-104e may be colored. In an embodiment of the present disclosure, each of the plurality of buffer tubes 104a-104e has a different color. In addition, total number of colors available for coloring the buffer tubes is 13. In an embodiment of the present disclosure, the coloring is done for identification of each of the plurality of buffer tubes 104a-104e. The colors include blue, orange, green, brown, silver, white, red, black, yellow, violet, pink, light green and aqua.
[0043] Further, each of the plurality of optical fibers 106a-106e is a fiber used for transmitting information as light pulses from one end to
Page 17 of 96
another. In addition, each of the plurality of optical fibers 106a-106e is a thin strand of glass capable of transmitting optical signals.
[0044] In an embodiment of the present disclosure, the evaluation of the UV stability of the plurality buffer tubes 104a-104e used in optical fibre cable 100 is performed according to the NF C 32-061 § 7.2 standards. Also, the results are compared to the requirements stated in the ST/CNET/5843 § 8.5. In another embodiment of the present disclosure, ten specimens of each buffer tube are subjected to a 350 hours artificial accelerated photoageing experiment. The experiment is performed in a SEPAP 12/24 unit (from Atlas) according to the EN 16472:2014 standard (“Plastics – Method for artificial accelerated photo ageing using medium pressure mercury vapour lamps”) and the NF C 32-061 § 7.2 standard. In yet another embodiment of the present disclosure, the SEPAP 12/24 device is equipped with four 400 W medium pressure mercury lamps. The bulbs of mercury lamps are manufactured in a borosilicate glass that filters all the wavelengths below 295 nm. In an embodiment of the present disclosure, the irradiance measured at the surface of the specimens is 95 Wm-2 in a range of 300 nanometers to 400 nanometers. In yet another embodiment of the present disclosure, the plurality of buffer tubes 104a-104e are fixed on central rotating carousel to ensure a homogeneous irradiation and the exposure is performed at 60˚C.
[0045] In an embodiment of the present disclosure, photomicrographs were taken before and after ageing using a Zeiss Stemi 2000-C stereoscopic microscope equipped with a Zeiss AxioCamErc 5s camera.
Page 18 of 96
In addition, microscopy is used to determine the section of the buffer tube.
[0046] In an embodiment of the present disclosure, mechanical tests are performed after removing the optical fibres according to the ST/CNET/5843 §7 technical specification. The tests are performed fulfilling the NF C 32-024 standard in order to measure the elongation at break (A%) and the tensile strength (σr). In another embodiment of the present disclosure, ten specimens are tested before irradiation and ten other specimens are tested after 350 hours irradiation period in SEPAP 12/24. Also, the measurements are performed using a MTS Qtest 50LP instrument in the experimental conditions of having 1000 N force as measured by the force sensor. The distance between the grips is 85 mm. The distance between the marks for the extensometer is 20 mm. The separation rate is 50mm/min. The room temperature is controlled at 23˚C.
[0047] In an embodiment of the present disclosure, the tensile test experiment is conducted using an extensometer. The test is conducted to measure the maximum force that a buffer tube can withstand, maximum strength of buffer tube (tensile strength) and elongation at break % (A%). The test is conducted on 13 different coloured buffer tubes. Also, the test is conducted on 10 different identical specimens of each of the 13 buffer tubes. The test is conducted two times on each specimen of each buffer tube. The test is conducted before ageing of the buffer tube that is at 0 hours of exposure to UV mercury lamp. The test
Page 19 of 96
is again conducted after ageing that is after 350 hours of exposure to UV mercury lamp. The testing parameters are defined. The distance between the grips is kept at 85 mm, the distance between the marks is kept at 20 mm and the separation rate is kept at 50 mm/min. (Mentioned above also).
[0048] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of red buffer tube. The cross sectional area of each specimen of red buffer tube is considered constant. The cross sectional area of red buffer tube in every specimen is 0.339 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.6 Mpa. Further, the elongation at break (%) for the first specimen is 169%. For second specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.1 Mpa. Further, the elongation at break (%) for the second specimen is 212%. For third specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.5 Mpa. Further, the elongation at break (%) for the third specimen is 151%. For fourth specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.9 Mpa. Further, the elongation at break (%) for the fourth specimen is 194%. For fifth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the
Page 20 of 96
buffer tube is 17.3 Mpa. Further, the elongation at break (%) for the fifth specimen is 226%. For sixth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.0 Mpa. Further, the elongation at break (%) for the sixth specimen is 205%. For seventh specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.7 Mpa. Further, the elongation at break (%) for the seventh specimen is 214%. For eighth specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the eighth specimen is 176%. For ninth specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the ninth specimen is 174%. For tenth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.3 Mpa. Further, the elongation at break (%) for the tenth specimen is 198%. The average maximum force for the 10 specimens is 5.9 N, the average maximum strength (tensile strength) for the 10 specimens is 17.5 Mpa and the average elongation at break for the 10 specimens is 192 %. Standard deviation for the maximum force is 0.2 N. Further, standard deviation for the maximum strength (tensile strength) is 0.6 and the standard deviation for elongation at break % is 24%.
[0049] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of red buffer
Page 21 of 96
tube. The cross sectional area of each specimen of red buffer tube is still the same. The cross sectional area of red buffer tube in every specimen after ageing is 0.339 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 5.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.8 Mpa. Further, the elongation at break (%) for the first specimen is 154%. For second specimen, the maximum force withstand by the buffer tube is 6.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.8 Mpa. Further, the elongation at break (%) for the second specimen is 144%. For third specimen, the maximum force withstand by the buffer tube is 5.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.9 Mpa. Further, the elongation at break (%) for the third specimen is 180%. For fourth specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the fourth specimen is 150%. For fifth specimen, the maximum force withstand by the buffer tube is 5.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the fifth specimen is 150%. For sixth specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the sixth specimen is 181%. For seventh specimen, the maximum force withstand by the buffer tube is 5.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.3 Mpa.
Page 22 of 96
Further, the elongation at break (%) for the seventh specimen is 157%. For eighth specimen, the maximum force withstand by the buffer tube is 5.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.7 Mpa. Further, the elongation at break (%) for the eighth specimen is 134%. For ninth specimen, the maximum force withstand by the buffer tube is 5.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.7 Mpa. Further, the elongation at break (%) for the ninth specimen is 186%. For tenth specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.8 Mpa. Further, the elongation at break (%) for the tenth specimen is 172%. The average maximum force for the 10 specimens is 5.3 N, the average maximum strength (tensile strength) for the 10 specimens is 15.8 Mpa and the average elongation at break for the 10 specimens is 163 %. Standard deviation for the maximum force is 0.4 N. Further, standard deviation for the maximum strength (tensile strength) is 1.0 and the standard deviation for elongation at break % is 18%.
[0050] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of red buffer tube is (192 ± 24) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of red buffer tube is (163 ± 18) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of red buffer tube is (17.5 ± 0.6) MPa at 0 hours of irradiation in SEPAP. Furthermore, the average tensile strength at break, σrof the ten specimens of red buffer tube is (15.8 ± 1) MPa at 350 hours of
Page 23 of 96
irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the red buffer tube is maximum of 15% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the red buffer tube is maximum of 10% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0051] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of violet buffer tube. The cross sectional area of each specimen of violet buffer tube is considered constant. The cross sectional area of violet buffer tube in every specimen is 0.353 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 3.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 10.9 Mpa. Further, the elongation at break (%) for the first specimen is 185%. For second specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.1 Mpa. Further, the elongation at break (%) for the second specimen is 212%. For third specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.2 Mpa. Further, the elongation at break (%) for the third specimen is 219%. For fourth specimen, the maximum force withstand by the buffer tube is 4.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 12.4 Mpa. Further, the elongation at break (%) for the fourth specimen is 149%. For fifth specimen, the maximum force withstand by the buffer tube is 4.5 N, the maximum strength (tensile strength)
Page 24 of 96
withstand by the buffer tube is 12.6 Mpa. Further, the elongation at break (%) for the fifth specimen is 160%. For sixth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.8 Mpa. Further, the elongation at break (%) for the sixth specimen is 176%. For seventh specimen, the maximum force withstand by the buffer tube is 5.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.3 Mpa. Further, the elongation at break (%) for the seventh specimen is 167%. For eighth specimen, the maximum force withstand by the buffer tube is 5.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the eighth specimen is 231%. For ninth specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the ninth specimen is 140%. For tenth specimen, the maximum force withstand by the buffer tube is 5.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.5 Mpa. Further, the elongation at break (%) for the tenth specimen is 222%. The average maximum force for the 10 specimens is 5.2 N, the average maximum strength (tensile strength) for the 10 specimens is 14.8 Mpa and the average elongation at break for the 10 specimens is 186%. Standard deviation for the maximum force is 0.8 N. Further, standard deviation for the maximum strength (tensile strength) is 2.3 and the standard deviation for elongation at break % is 33%.
[0052] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of violet buffer
Page 25 of 96
tube. The cross sectional area of each specimen of violet buffer tube is still the same. The cross sectional area of violet buffer tube in every specimen after ageing is 0.353 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 4.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.9 Mpa. Further, the elongation at break (%) for the first specimen is 167%. For second specimen, the maximum force withstand by the buffer tube is 4.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.6 Mpa. Further, the elongation at break (%) for the second specimen is 183%. For third specimen, the maximum force withstand by the buffer tube is 5.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.9 Mpa. Further, the elongation at break (%) for the third specimen is 103%. For fourth specimen, the maximum force withstand by the buffer tube is 5.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.3 Mpa. Further, the elongation at break (%) for the fourth specimen is 151%. For fifth specimen, the maximum force withstand by the buffer tube is 4.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 11.8 Mpa. Further, the elongation at break (%) for the fifth specimen is 152%. For sixth specimen, the maximum force withstand by the buffer tube is 4.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.0 Mpa. Further, the elongation at break (%) for the sixth specimen is 142%. For seventh specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa.
Page 26 of 96
Further, the elongation at break (%) for the seventh specimen is 162%. For eighth specimen, the maximum force withstand by the buffer tube is 4.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 11.4 Mpa. Further, the elongation at break (%) for the eighth specimen is 124%. For ninth specimen, the maximum force withstand by the buffer tube is 4.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 11.3 Mpa. Further, the elongation at break (%) for the ninth specimen is 156%. For tenth specimen, the maximum force withstand by the buffer tube is 5.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.1 Mpa. Further, the elongation at break (%) for the tenth specimen is 174%. The average maximum force for the 10 specimens is 4.8 N, the average maximum strength (tensile strength) for the 10 specimens is 13.5 Mpa and the average elongation at break for the 10 specimens is 152 %. Standard deviation for the maximum force is 0.6 N. Further, standard deviation for the maximum strength (tensile strength) is 1.6 and the standard deviation for elongation at break % is 24%.
[0053] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of violet buffer tube is (186 ± 33) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of violet buffer tube is (152 ± 24) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of violet buffer tube is (14.8 ± 2.3) MPa at 0 hours of irradiation in SEPAP. Furthermore, the average tensile strength at break, σrof the ten specimens of violet buffer tube is (13.5 ± 1.6) MPa at 350 hours of
Page 27 of 96
irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the violet buffer tube is maximum of 18% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the violet buffer tube is maximum of 9% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0054] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of silver buffer tube. The cross sectional area of each specimen of silver buffer tube is considered constant. The cross sectional area of silver buffer tube in every specimen is 0.316 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.5 Mpa. Further, the elongation at break (%) for the first specimen is 205%. For second specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.4 Mpa. Further, the elongation at break (%) for the second specimen is 210%. For third specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.2 Mpa. Further, the elongation at break (%) for the third specimen is 209%. For fourth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.1 Mpa. Further, the elongation at break (%) for the fourth specimen is 215%. For fifth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength)
Page 28 of 96
withstand by the buffer tube is 20.7 Mpa. Further, the elongation at break (%) for the fifth specimen is 194%. For sixth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.1 Mpa. Further, the elongation at break (%) for the sixth specimen is 208%. For seventh specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.8 Mpa. Further, the elongation at break (%) for the seventh specimen is 199%. For eighth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.5 Mpa. Further, the elongation at break (%) for the eighth specimen is 204%. For ninth specimen, the maximum force withstand by the buffer tube is 6.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.1 Mpa. Further, the elongation at break (%) for the ninth specimen is 208%. For tenth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.4 Mpa. Further, the elongation at break (%) for the tenth specimen is 204%. The average maximum force for the 10 specimens is 6.3 N, the average maximum strength (tensile strength) for the 10 specimens is 20.1 Mpa and the average elongation at break for the 10 specimens is 206%. Standard deviation for the maximum force is 0.2 N. Further, standard deviation for the maximum strength (tensile strength) is 0.5 and the standard deviation for elongation at break % is 6%.
[0055] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of silver buffer
Page 29 of 96
tube. The cross sectional area of each specimen of silver buffer tube is still the same. The cross sectional area of silver buffer tube in every specimen after ageing is 0.316 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.2 Mpa. Further, the elongation at break (%) for the first specimen is 179%. For second specimen, the maximum force withstand by the buffer tube is 5.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.6 Mpa. Further, the elongation at break (%) for the second specimen is 160%. For third specimen, the maximum force withstand by the buffer tube is 6.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.9 Mpa. Further, the elongation at break (%) for the third specimen is 166%. For fourth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.8 Mpa. Further, the elongation at break (%) for the fourth specimen is 165%. For fifth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.9 Mpa. Further, the elongation at break (%) for the fifth specimen is 159%. For sixth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.3 Mpa. Further, the elongation at break (%) for the sixth specimen is 181%. For seventh specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.4 Mpa.
Page 30 of 96
Further, the elongation at break (%) for the seventh specimen is 169%. For eighth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.9 Mpa. Further, the elongation at break (%) for the eighth specimen is 180%. For ninth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.9 Mpa. Further, the elongation at break (%) for the ninth specimen is 182%. For tenth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.9 Mpa. Further, the elongation at break (%) for the tenth specimen is 184%. The average maximum force for the 10 specimens is 6.1 N, the average maximum strength (tensile strength) for the 10 specimens is 19.2 Mpa and the average elongation at break for the 10 specimens is 173 %. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.9 and the standard deviation for elongation at break % is 10%.
[0056] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of silver buffer tube is (206 ± 6) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of silver buffer tube is (173 ± 10) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of silver buffer tube is (20.1 ± 0.5) MPa at 0 hours of irradiation in SEPAP. Furthermore, the average tensile strength at break, σrof the ten specimens of silver buffer tube is (19.2 ± 0.9) MPa at 350 hours of
Page 31 of 96
irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the silver buffer tube is maximum of 16% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the silver buffer tube is maximum of 4% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0057] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of orange buffer tube. The cross sectional area of each specimen of orange buffer tube is considered constant. The cross sectional area of orange buffer tube in every specimen is 0.370 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.2 Mpa. Further, the elongation at break (%) for the first specimen is 199%. For second specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 18 Mpa. Further, the elongation at break (%) for the second specimen is 210%. For third specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.8 Mpa. Further, the elongation at break (%) for the third specimen is 226%. For fourth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.5 Mpa. Further, the elongation at break (%) for the fourth specimen is 178%. For fifth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile
Page 32 of 96
strength) withstand by the buffer tube is 17 Mpa. Further, the elongation at break (%) for the fifth specimen is 219%. For sixth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.6 Mpa. Further, the elongation at break (%) for the sixth specimen is 206%. For seventh specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the seventh specimen is 178%. For eighth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.6 Mpa. Further, the elongation at break (%) for the eighth specimen is 217%. For ninth specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.8Mpa. Further, the elongation at break (%) for the ninth specimen is 202%. For tenth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.1 Mpa. Further, the elongation at break (%) for the tenth specimen is 207%. The average maximum force for the 10 specimens is 6.5 N, the average maximum strength (tensile strength) for the 10 specimens is 17.5 Mpa and the average elongation at break for the 10 specimens is 204%. Standard deviation for the maximum force is 0.2 N. Further, standard deviation for the maximum strength (tensile strength) is 0.6 and the standard deviation for elongation at break % is 16%.
Page 33 of 96
[0058] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of orange buffer tube. The cross sectional area of each specimen of orange buffer tube is still the same. The cross sectional area of orange buffer tube in every specimen after ageing is 0.370 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micromodule. For first specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.8 Mpa. Further, the elongation at break (%) for the first specimen is 181%. For second specimen, the maximum force withstand by the buffer tube is 6.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.6 Mpa. Further, the elongation at break (%) for the second specimen is 173%. For third specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.6 Mpa. Further, the elongation at break (%) for the third specimen is 162%. For fourth specimen, the maximum force withstand by the buffer tube is 5.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.3 Mpa. Further, the elongation at break (%) for the fourth specimen is 168%. For fifth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17 Mpa. Further, the elongation at break (%) for the fifth specimen is 178%. For sixth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.3 Mpa. Further, the elongation at break (%) for the sixth specimen is 166%. For seventh specimen, the
Page 34 of 96
maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the seventh specimen is 190%. For eighth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17 Mpa. Further, the elongation at break (%) for the eighth specimen is 172%. For ninth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.4 Mpa. Further, the elongation at break (%) for the ninth specimen is 189%. For tenth specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.9 Mpa. Further, the elongation at break (%) for the tenth specimen is 168%. The average maximum force for the 10 specimens is 6.3 N, the average maximum strength (tensile strength) for the 10 specimens is 17.1 Mpa and the average elongation at break for the 10 specimens is 175 %. Standard deviation for the maximum force is 0.4 N. Further, standard deviation for the maximum strength (tensile strength) is 1.2 and the standard deviation for elongation at break % is 9%.
[0059] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of orange buffer tube is (204 ± 16) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of orange buffer tube is (175 ± 9) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of orange buffer tube is (17.5 ± 0.6) MPa at 0 hours of irradiation in SEPAP.
Page 35 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of orange buffer tube is (17.1 ± 1.2) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the orange buffer tube is maximum of 14% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the orange buffer tube is maximum of 2% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0060] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of blue buffer tube. The cross sectional area of each specimen of blue buffer tube is considered constant. The cross sectional area of blue buffer tube in every specimen is 0.377 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the first specimen is 185%. For second specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.5 Mpa. Further, the elongation at break (%) for the second specimen is 190%. For third specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.5 Mpa. Further, the elongation at break (%) for the third specimen is 228%. For fourth specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the fourth specimen is
Page 36 of 96
212%. For fifth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the fifth specimen is 218%. For sixth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the sixth specimen is 207%. For seventh specimen, the maximum force withstand by the buffer tube is 7.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.2 Mpa. Further, the elongation at break (%) for the seventh specimen is 210%. For eighth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.1 Mpa. Further, the elongation at break (%) for the eighth specimen is 196%. For ninth specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 16 Mpa. Further, the elongation at break (%) for the ninth specimen is 199%. For tenth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the tenth specimen is 211%. The average maximum force for the 10 specimens is 6.4 N, the average maximum strength (tensile strength) for the 10 specimens is 17.1 Mpa and the average elongation at break for the 10 specimens is 205%. Standard deviation for the maximum force is 0.5 N. Further, standard deviation for the maximum strength (tensile strength) is 1.2 and the standard deviation for elongation at break % is 13%.
Page 37 of 96
[0061] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of blue buffer tube. The cross sectional area of each specimen of blue buffer tube is still the same. The cross sectional area of blue buffer tube in every specimen after ageing is 0.377 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.7 Mpa. Further, the elongation at break (%) for the first specimen is 160%. For second specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.9 Mpa. Further, the elongation at break (%) for the second specimen is 199%. For third specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the third specimen is 162%. For fourth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.2 Mpa. Further, the elongation at break (%) for the fourth specimen is 192%. For fifth specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the fifth specimen is 181%. For sixth specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the sixth specimen is 179%. For seventh specimen, the maximum force
Page 38 of 96
withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.6 Mpa. Further, the elongation at break (%) for the seventh specimen is 171%. For eighth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.9 Mpa. Further, the elongation at break (%) for the eighth specimen is 189%. For ninth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.6 Mpa. Further, the elongation at break (%) for the ninth specimen is 174%. For tenth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.7 Mpa. Further, the elongation at break (%) for the tenth specimen is 176%. The average maximum force for the 10 specimens is 6.1 N, the average maximum strength (tensile strength) for the 10 specimens is 16.3 Mpa and the average elongation at break for the 10 specimens is 178 %. Standard deviation for the maximum force is 0.2 N. Further, standard deviation for the maximum strength (tensile strength) is 0.6 and the standard deviation for elongation at break % is 13%.
[0062] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of blue buffer tube is (205 ± 13) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of blue buffer tube is (178 ± 13) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σr of the ten specimens of blue buffer tube is (17.1 ± 1.2) MPa at 0 hours of irradiation in SEPAP.
Page 39 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of blue buffer tube is (16.3 ± 0.6) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the blue buffer tube is maximum of 13% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the blue buffer tube is maximum of 5% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0063] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of brown buffer tube. The cross sectional area of each specimen of brown buffer tube is considered constant. The cross sectional area of brown buffer tube in every specimen is 0.404 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.7 Mpa. Further, the elongation at break (%) for the first specimen is 213%. For second specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the second specimen is 198%. For third specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the third specimen is 205%. For fourth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the fourth
Page 40 of 96
specimen is 206%. For fifth specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the fifth specimen is 194%. For sixth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.5 Mpa. Further, the elongation at break (%) for the sixth specimen is 201%. For seventh specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.3 Mpa. Further, the elongation at break (%) for the seventh specimen is 170%. For eighth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the eighth specimen is 206%. For ninth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2Mpa. Further, the elongation at break (%) for the ninth specimen is 231%. For tenth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.3 Mpa. Further, the elongation at break (%) for the tenth specimen is 200%. The average maximum force for the 10 specimens is 6.4 N, the average maximum strength (tensile strength) for the 10 specimens is 15.7 Mpa and the average elongation at break for the 10 specimens is 202%. Standard deviation for the maximum force is 0.2 N. Further, standard deviation for the maximum strength (tensile strength) is 0.6 and the standard deviation for elongation at break % is 15%.
Page 41 of 96
[0064] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of brown buffer tube. The cross sectional area of each specimen of brown buffer tube is still the same. The cross sectional area of brown buffer tube in every specimen after ageing is 0.404 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.4 Mpa. Further, the elongation at break (%) for the first specimen is 201%. For second specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.0 Mpa. Further, the elongation at break (%) for the second specimen is 197%. For third specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.0 Mpa. Further, the elongation at break (%) for the third specimen is 187%. For fourth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.3 Mpa. Further, the elongation at break (%) for the fourth specimen is 182%. For fifth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.2 Mpa. Further, the elongation at break (%) for the fifth specimen is 156%. For sixth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.6 Mpa. Further, the elongation at break (%) for the sixth specimen is 198%. For seventh specimen, the
Page 42 of 96
maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.6 Mpa. Further, the elongation at break (%) for the seventh specimen is 198%. For eighth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.5 Mpa. Further, the elongation at break (%) for the eighth specimen is 203%. For ninth specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.2 Mpa. Further, the elongation at break (%) for the ninth specimen is 162%. For tenth specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the tenth specimen is 193%. The average maximum force for the 10 specimens is 6 N, the average maximum strength (tensile strength) for the 10 specimens is 14.9 Mpa and the average elongation at break for the 10 specimens is 188 %. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.7 and the standard deviation for elongation at break % is 17%.
[0065] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of brown buffer tube is (202 ± 15) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of brown buffer tube is (188 ± 17) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of brown buffer tube is (15.7 ± 0.6) MPa at 0 hours of irradiation in SEPAP.
Page 43 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of brown buffer tube is (14.9 ± 0.7) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the brown buffer tube is maximum of 7% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the brown buffer tube is maximum of 5% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0066] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of black buffer tube. The cross sectional area of each specimen of black buffer tube is considered constant. The cross sectional area of black buffer tube in every specimen is 0.415 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.5 Mpa. Further, the elongation at break (%) for the first specimen is 213%. For second specimen, the maximum force withstand by the buffer tube is 7.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.2 Mpa. Further, the elongation at break (%) for the second specimen is 229%. For third specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.8 Mpa. Further, the elongation at break (%) for the third specimen is 217%. For fourth specimen, the maximum force withstand by the buffer tube is 7.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.4 Mpa. Further, the elongation at break (%) for the fourth
Page 44 of 96
specimen is 199%. For fifth specimen, the maximum force withstand by the buffer tube is 7.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.4 Mpa. Further, the elongation at break (%) for the fifth specimen is 228%. For sixth specimen, the maximum force withstand by the buffer tube is 7.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.5 Mpa. Further, the elongation at break (%) for the sixth specimen is 221%. For seventh specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the seventh specimen is 215%. For eighth specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the eighth specimen is 223%. For ninth specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.1Mpa. Further, the elongation at break (%) for the ninth specimen is 206%. For tenth specimen, the maximum force withstand by the buffer tube is 7.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 17 Mpa. Further, the elongation at break (%) for the tenth specimen is 200%. The average maximum force for the 10 specimens is 7 N, the average maximum strength (tensile strength) for the 10 specimens is 16.9 Mpa and the average elongation at break for the 10 specimens is 215%. Standard deviation for the maximum force is 0.2 N. Further, standard deviation for the maximum strength (tensile strength) is 0.5 and the standard deviation for elongation at break % is 11%.
Page 45 of 96
[0067] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of black buffer tube. The cross sectional area of each specimen of black buffer tube is still the same. The cross sectional area of black buffer tube in every specimen after ageing is 0.415 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.5 Mpa. Further, the elongation at break (%) for the first specimen is 186%. For second specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.5 Mpa. Further, the elongation at break (%) for the second specimen is 183%. For third specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the third specimen is 170%. For fourth specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.9 Mpa. Further, the elongation at break (%) for the fourth specimen is 184%. For fifth specimen, the maximum force withstand by the buffer tube is 6.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.6 Mpa. Further, the elongation at break (%) for the fifth specimen is 174%. For sixth specimen, the maximum force withstand by the buffer tube is 6.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the sixth specimen is 184%. For seventh specimen, the
Page 46 of 96
maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.1 Mpa. Further, the elongation at break (%) for the seventh specimen is 170%. For eighth specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.9 Mpa. Further, the elongation at break (%) for the eighth specimen is 195%. For ninth specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the ninth specimen is 189%. For tenth specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the tenth specimen is 162%. The average maximum force for the 10 specimens is 6.9 N, the average maximum strength (tensile strength) for the 10 specimens is 16.5 Mpa and the average elongation at break for the 10 specimens is 180 %. Standard deviation for the maximum force is 0.1 N. Further, standard deviation for the maximum strength (tensile strength) is 0.3 and the standard deviation for elongation at break % is 10%.
[0068] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of black buffer tube is (215 ± 11) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of black buffer tube is (180 ± 10) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of black buffer tube is (16.9 ± 0.5) MPa at 0 hours of irradiation in SEPAP.
Page 47 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of black buffer tube is (16.5 ± 0.3) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the black buffer tube is maximum of 16% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the black buffer tube is maximum of 2% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0069] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of green buffer tube. The cross sectional area of each specimen of green buffer tube is considered constant. The cross sectional area of green buffer tube in every specimen is 0.388 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 5.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.6 Mpa. Further, the elongation at break (%) for the first specimen is 176%. For second specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the second specimen is 215%. For third specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the third specimen is 207%. For fourth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.3 Mpa. Further, the elongation at break (%) for the fourth
Page 48 of 96
specimen is 180%. For fifth specimen, the maximum force withstand by the buffer tube is 5.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.5 Mpa. Further, the elongation at break (%) for the fifth specimen is 229%. For sixth specimen, the maximum force withstand by the buffer tube is 6.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.5 Mpa. Further, the elongation at break (%) for the sixth specimen is 212%. For seventh specimen, the maximum force withstand by the buffer tube is 5.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.4 Mpa. Further, the elongation at break (%) for the seventh specimen is 222%. For eighth specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.2 Mpa. Further, the elongation at break (%) for the eighth specimen is 170%. For ninth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.1Mpa. Further, the elongation at break (%) for the ninth specimen is 178%. For tenth specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.2 Mpa. Further, the elongation at break (%) for the tenth specimen is 213%. The average maximum force for the 10 specimens is 5.8 N, the average maximum strength (tensile strength) for the 10 specimens is 14.8 Mpa and the average elongation at break for the 10 specimens is 200%. Standard deviation for the maximum force is 0.4 N. Further, standard deviation for the maximum strength (tensile strength) is 1.0 and the standard deviation for elongation at break % is 22%.
Page 49 of 96
[0070] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of green buffer tube. The cross sectional area of each specimen of green buffer tube is still the same. The cross sectional area of green buffer tube in every specimen after ageing is 0.388 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.6 Mpa. Further, the elongation at break (%) for the first specimen is 133%. For second specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.3 Mpa. Further, the elongation at break (%) for the second specimen is 173%. For third specimen, the maximum force withstand by the buffer tube is 5.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.8 Mpa. Further, the elongation at break (%) for the third specimen is 123%. For fourth specimen, the maximum force withstand by the buffer tube is 4.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 12.6 Mpa. Further, the elongation at break (%) for the fourth specimen is 161%. For fifth specimen, the maximum force withstand by the buffer tube is 4.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 10.6 Mpa. Further, the elongation at break (%) for the fifth specimen is 132%. For sixth specimen, the maximum force withstand by the buffer tube is 4.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 10.8 Mpa. Further, the elongation at break (%) for the sixth specimen is 152%. For seventh specimen, the
Page 50 of 96
maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.8 Mpa. Further, the elongation at break (%) for the seventh specimen is 164%. For eighth specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.5 Mpa. Further, the elongation at break (%) for the eighth specimen is 150%. For ninth specimen, the maximum force withstand by the buffer tube is 5.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 12.8 Mpa. Further, the elongation at break (%) for the ninth specimen is 160%. For tenth specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.2 Mpa. Further, the elongation at break (%) for the tenth specimen is 104%. The average maximum force for the 10 specimens is 5.3 N, the average maximum strength (tensile strength) for the 10 specimens is 13.6 Mpa and the average elongation at break for the 10 specimens is 145 %. Standard deviation for the maximum force is 0.8 N. Further, standard deviation for the maximum strength (tensile strength) is 2.0 and the standard deviation for elongation at break % is 21%.
[0071] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of green buffer tube is (200 ± 22) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of green buffer tube is (145 ± 21) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of green buffer tube is (14.8 ± 1.0) MPa at 0 hours of irradiation in SEPAP.
Page 51 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of green buffer tube is (13.6 ± 2.0) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the green buffer tube is maximum of 28% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the green buffer tube is maximum of 8% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0072] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of white buffer tube. The cross sectional area of each specimen of white buffer tube is considered constant. The cross sectional area of white buffer tube in every specimen is 0.364 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.8 Mpa. Further, the elongation at break (%) for the first specimen is 219%. For second specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the second specimen is 207%. For third specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.0 Mpa. Further, the elongation at break (%) for the third specimen is 206%. For fourth specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.2 Mpa. Further, the elongation at break (%) for the fourth
Page 52 of 96
specimen is 180%. For fifth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.3 Mpa. Further, the elongation at break (%) for the fifth specimen is 196%. For sixth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.0 Mpa. Further, the elongation at break (%) for the sixth specimen is 185%. For seventh specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.8 Mpa. Further, the elongation at break (%) for the seventh specimen is 202%. For eighth specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.1 Mpa. Further, the elongation at break (%) for the eighth specimen is 195%. For ninth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.1Mpa. Further, the elongation at break (%) for the ninth specimen is 182%. For tenth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the tenth specimen is 188%. The average maximum force for the 10 specimens is 6.3 N, the average maximum strength (tensile strength) for the 10 specimens is 17.2 Mpa and the average elongation at break for the 10 specimens is 196%. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.8 and the standard deviation for elongation at break % is 13%.
Page 53 of 96
[0073] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of white buffer tube. The cross sectional area of each specimen of white buffer tube is still the same. The cross sectional area of white buffer tube in every specimen after ageing is 0.364 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.7 Mpa. Further, the elongation at break (%) for the first specimen is 182%. For second specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.1 Mpa. Further, the elongation at break (%) for the second specimen is 193%. For third specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.3 Mpa. Further, the elongation at break (%) for the third specimen is 183%. For fourth specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the fourth specimen is 185%. For fifth specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.1 Mpa. Further, the elongation at break (%) for the fifth specimen is 160%. For sixth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.2 Mpa. Further, the elongation at break (%) for the sixth specimen is 186%. For seventh specimen, the
Page 54 of 96
maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.1 Mpa. Further, the elongation at break (%) for the seventh specimen is 177%. For eighth specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.8 Mpa. Further, the elongation at break (%) for the eighth specimen is 171%. For ninth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.5 Mpa. Further, the elongation at break (%) for the ninth specimen is 190%. For tenth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.4 Mpa. Further, the elongation at break (%) for the tenth specimen is 187%. The average maximum force for the 10 specimens is 6.2 N, the average maximum strength (tensile strength) for the 10 specimens is 17.1 Mpa and the average elongation at break for the 10 specimens is 181 %. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.8 and the standard deviation for elongation at break % is 10%.
[0074] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of white buffer tube is (196 ± 13) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of white buffer tube is (181 ± 10) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of white buffer tube is (17.2 ± 0.8) MPa at 0 hours of irradiation in SEPAP.
Page 55 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of white buffer tube is (17.1 ± 0.8) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the white buffer tube is maximum of 8% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the white buffer tube is maximum of 1% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0075] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of yellow buffer tube. The cross sectional area of each specimen of yellow buffer tube is considered constant. The cross sectional area of yellow buffer tube in every specimen is 0.410 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.8 Mpa. Further, the elongation at break (%) for the first specimen is 170%. For second specimen, the maximum force withstand by the buffer tube is 5.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.1 Mpa. Further, the elongation at break (%) for the second specimen is 164%. For third specimen, the maximum force withstand by the buffer tube is 5.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.1 Mpa. Further, the elongation at break (%) for the third specimen is 138%. For fourth specimen, the maximum force withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.4 Mpa. Further, the elongation at break (%) for the
Page 56 of 96
fourth specimen is 144%. For fifth specimen, the maximum force withstand by the buffer tube is 4.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 10 Mpa. Further, the elongation at break (%) for the fifth specimen is 125%. For sixth specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.9 Mpa. Further, the elongation at break (%) for the sixth specimen is 173%. For seventh specimen, the maximum force withstand by the buffer tube is 4.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 11.8 Mpa. Further, the elongation at break (%) for the seventh specimen is 175%. For eighth specimen, the maximum force withstand by the buffer tube is 4.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 12 Mpa. Further, the elongation at break (%) for the eighth specimen is 130%. For ninth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.3Mpa. Further, the elongation at break (%) for the ninth specimen is 187%. For tenth specimen, the maximum force withstand by the buffer tube is 5.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 13 Mpa. Further, the elongation at break (%) for the tenth specimen is 157%. The average maximum force for the 10 specimens is 5.3 N, the average maximum strength (tensile strength) for the 10 specimens is 13 Mpa and the average elongation at break for the 10 specimens is 157%. Standard deviation for the maximum force is 0.6 N. Further, standard deviation for the maximum strength (tensile strength) is 1.5 and the standard deviation for elongation at break % is 21%.
Page 57 of 96
[0076] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of yellow buffer tube. The cross sectional area of each specimen of yellow buffer tube is still the same. The cross sectional area of yellow buffer tube in every specimen after ageing is 0.410 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 4.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 10.1 Mpa. Further, the elongation at break (%) for the first specimen is 74%. For second specimen, the maximum force withstand by the buffer tube is 4.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 12 Mpa. Further, the elongation at break (%) for the second specimen is 143%. For third specimen, the maximum force withstand by the buffer tube is 4.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 11.1 Mpa. Further, the elongation at break (%) for the third specimen is 106%. For fourth specimen, the maximum force withstand by the buffer tube is 4 N, the maximum strength (tensile strength) withstand by the buffer tube is 9.9 Mpa. Further, the elongation at break (%) for the fourth specimen is 94%. For fifth specimen, the maximum force withstand by the buffer tube is 5.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 12.5 Mpa. Further, the elongation at break (%) for the fifth specimen is 169%. For sixth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.1 Mpa. Further, the elongation at break (%) for the sixth specimen is 171%. For seventh specimen, the maximum force
Page 58 of 96
withstand by the buffer tube is 5.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.3 Mpa. Further, the elongation at break (%) for the seventh specimen is 188%. For eighth specimen, the maximum force withstand by the buffer tube is 4.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 10.5 Mpa. Further, the elongation at break (%) for the eighth specimen is 125%. For ninth specimen, the maximum force withstand by the buffer tube is 4.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 11.6 Mpa. Further, the elongation at break (%) for the ninth specimen is 145%. For tenth specimen, the maximum force withstand by the buffer tube is 5 N, the maximum strength (tensile strength) withstand by the buffer tube is 12.2 Mpa. Further, the elongation at break (%) for the tenth specimen is 183%. The average maximum force for the 10 specimens is 4.8 N, the average maximum strength (tensile strength) for the 10 specimens is 11.7 Mpa and the average elongation at break for the 10 specimens is 140 %. Standard deviation for the maximum force is 0.6 N. Further, standard deviation for the maximum strength (tensile strength) is 1.4 and the standard deviation for elongation at break % is 39%.
[0077] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of yellow buffer tube is (157 ± 21) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of yellow buffer tube is (140 ± 39) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of yellow buffer tube is (13.0 ± 1.5) MPa at 0 hours of irradiation in SEPAP.
Page 59 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of yellow buffer tube is (11.7 ± 1.4) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the yellow buffer tube is maximum of 11% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the yellow buffer tube is maximum of 10% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0078] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of pink buffer tube. The cross sectional area of each specimen of pink buffer tube is considered constant. The cross sectional area of pink buffer tube in every specimen is 0.388 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.0 Mpa. Further, the elongation at break (%) for the first specimen is 198%. For second specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the second specimen is 188%. For third specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.4 Mpa. Further, the elongation at break (%) for the third specimen is 216%. For fourth specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.6 Mpa. Further, the elongation at break (%) for the fourth specimen is
Page 60 of 96
206%. For fifth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.2 Mpa. Further, the elongation at break (%) for the fifth specimen is 211%. For sixth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the sixth specimen is 188%. For seventh specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.3 Mpa. Further, the elongation at break (%) for the seventh specimen is 193%. For eighth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.8 Mpa. Further, the elongation at break (%) for the eighth specimen is 192%. For ninth specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.3 Mpa. Further, the elongation at break (%) for the ninth specimen is 219%. For tenth specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.3 Mpa. Further, the elongation at break (%) for the tenth specimen is 216%. The average maximum force for the 10 specimens is 6.4 N, the average maximum strength (tensile strength) for the 10 specimens is 16.6 Mpa and the average elongation at break for the 10 specimens is 203%. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.7 and the standard deviation for elongation at break % is 12%.
Page 61 of 96
[0079] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of pink buffer tube. The cross sectional area of each specimen of pink buffer tube is still the same. The cross sectional area of pink buffer tube in every specimen after ageing is 0.388 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micromodule. For first specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 17.1 Mpa. Further, the elongation at break (%) for the first specimen is 176%. For second specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.1 Mpa. Further, the elongation at break (%) for the second specimen is 175%. For third specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the third specimen is 183%. For fourth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 15 Mpa. Further, the elongation at break (%) for the fourth specimen is 186%. For fifth specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the fifth specimen is 157%. For sixth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the sixth specimen is 172%. For seventh specimen, the
Page 62 of 96
maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.9 Mpa. Further, the elongation at break (%) for the seventh specimen is 168%. For eighth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.3 Mpa. Further, the elongation at break (%) for the eighth specimen is 179%. For ninth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the ninth specimen is 175%. For tenth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.3 Mpa. Further, the elongation at break (%) for the tenth specimen is 172%. The average maximum force for the 10 specimens is 6.3 N, the average maximum strength (tensile strength) for the 10 specimens is 16.2 Mpa and the average elongation at break for the 10 specimens is 174 %. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.7 and the standard deviation for elongation at break % is 8%.
[0080] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of pink buffer tube is (203 ± 12) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of pink buffer tube is (174 ± 8) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten specimens of pink buffer tube is (16.6 ± 0.7) MPa at 0 hours of irradiation in SEPAP.
Page 63 of 96
Furthermore, the average tensile strength at break, σrof the ten specimens of pink buffer tube is (16.2 ± 0.7) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the pink buffer tube is maximum of 14% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the pink buffer tube is maximum of 2% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0081] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of aqua buffer tube. The cross sectional area of each specimen of aqua buffer tube is considered constant. The cross sectional area of aqua buffer tube in every specimen is 0.329 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.1 Mpa. Further, the elongation at break (%) for the first specimen is 188%. For second specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.6 Mpa. Further, the elongation at break (%) for the second specimen is 186%. For third specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.8 Mpa. Further, the elongation at break (%) for the third specimen is 200%. For fourth specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.4 Mpa. Further, the elongation at break (%) for the fourth specimen is
Page 64 of 96
220%. For fifth specimen, the maximum force withstand by the buffer tube is 6.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.4 Mpa. Further, the elongation at break (%) for the fifth specimen is 206%. For sixth specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.8 Mpa. Further, the elongation at break (%) for the sixth specimen is 199%. For seventh specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 21.4 Mpa. Further, the elongation at break (%) for the seventh specimen is 207%. For eighth specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.7 Mpa. Further, the elongation at break (%) for the eighth specimen is 213%. For ninth specimen, the maximum force withstand by the buffer tube is 6.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 21.1Mpa. Further, the elongation at break (%) for the ninth specimen is 189%. For tenth specimen, the maximum force withstand by the buffer tube is 7 N, the maximum strength (tensile strength) withstand by the buffer tube is 21.2 Mpa. Further, the elongation at break (%) for the tenth specimen is 212%. The average maximum force for the 10 specimens is 6.8 N, the average maximum strength (tensile strength) for the 10 specimens is 20.6 Mpa and the average elongation at break for the 10 specimens is 202%. Standard deviation for the maximum force is 0.2 N. Further, standard deviation for the maximum strength (tensile strength) is 0.5 and the standard deviation for elongation at break % is 12%.
Page 65 of 96
[0082] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of aqua buffer tube. The cross sectional area of each specimen of aqua buffer tube is still the same. The cross sectional area of aqua buffer tube in every specimen after ageing is 0.329 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micro module. For first specimen, the maximum force withstand by the buffer tube is 6.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.9 Mpa. Further, the elongation at break (%) for the first specimen is 176%. For second specimen, the maximum force withstand by the buffer tube is 6.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.9 Mpa. Further, the elongation at break (%) for the second specimen is 175%. For third specimen, the maximum force withstand by the buffer tube is 6.4 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.6 Mpa. Further, the elongation at break (%) for the third specimen is 189%. For fourth specimen, the maximum force withstand by the buffer tube is 7.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 21.7 Mpa. Further, the elongation at break (%) for the fourth specimen is 199%. For fifth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.9 Mpa. Further, the elongation at break (%) for the fifth specimen is 186%. For sixth specimen, the maximum force withstand by the buffer tube is 6.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.8 Mpa. Further, the elongation at break (%) for the sixth specimen is 194%. For seventh specimen, the
Page 66 of 96
maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 20.1 Mpa. Further, the elongation at break (%) for the seventh specimen is 175%. For eighth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 18.8 Mpa. Further, the elongation at break (%) for the eighth specimen is 187%. For ninth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.8 Mpa. Further, the elongation at break (%) for the ninth specimen is 181%. For tenth specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 19.8 Mpa. Further, the elongation at break (%) for the tenth specimen is 198%. The average maximum force for the 10 specimens is 6.6 N, the average maximum strength (tensile strength) for the 10 specimens is 20.2 Mpa and the average elongation at break for the 10 specimens is 186 %. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.8 and the standard deviation for elongation at break % is 9%.
[0083] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of aqua buffer tube is (202 ± 12) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of aqua buffer tube is (186 ± 9) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σr of the ten specimens of aqua buffer tube is (20.6 ± 0.5) MPa at 0 hours of irradiation in SEPAP.
Page 67 of 96
Furthermore, the average tensile strength at break, σr of the ten specimens of aqua buffer tube is (20.2 ± 0.8) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the aqua buffer tube is maximum of 8% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the aqua buffer tube is maximum of 2% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0084] In an embodiment of the present disclosure, the experiment is performed at 0 hours that is before ageing of light green buffer tube. The cross sectional area of each specimen of light green buffer tube is considered constant. The cross sectional area of light green buffer tube in every specimen is 0.394 mm2. The experiment is performed based on the parameters and conditions mentioned above in the patent application. For first specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.4 Mpa. Further, the elongation at break (%) for the first specimen is 191%. For second specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.5 Mpa. Further, the elongation at break (%) for the second specimen is 208%. For third specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.5 Mpa. Further, the elongation at break (%) for the third specimen is 186%. For fourth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.0 Mpa. Further, the elongation at break (%) for the
Page 68 of 96
fourth specimen is 166%. For fifth specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.8 Mpa. Further, the elongation at break (%) for the fifth specimen is 165%. For sixth specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.1 Mpa. Further, the elongation at break (%) for the sixth specimen is 187%. For seventh specimen, the maximum force withstand by the buffer tube is 6.5 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.4 Mpa. Further, the elongation at break (%) for the seventh specimen is 200%. For eighth specimen, the maximum force withstand by the buffer tube is 6.1 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.4 Mpa. Further, the elongation at break (%) for the eighth specimen is 180%. For ninth specimen, the maximum force withstand by the buffer tube is 6.0 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.2Mpa. Further, the elongation at break (%) for the ninth specimen is 212%. For tenth specimen, the maximum force withstand by the buffer tube is 6.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 16 Mpa. Further, the elongation at break (%) for the tenth specimen is 193%. The average maximum force for the 10 specimens is 6.1 N, the average maximum strength (tensile strength) for the 10 specimens is 15.5 Mpa and the average elongation at break for the 10 specimens is 189%. Standard deviation for the maximum force is 0.3 N. Further, standard deviation for the maximum strength (tensile strength) is 0.7 and the standard deviation for elongation at break % is 16%.
Page 69 of 96
[0085] In another embodiment of the present disclosure, the experiment is performed at 350 hours that is after ageing of light green buffer tube. The cross sectional area of each specimen of light green buffer tube is still the same. The cross sectional area of light green buffer tube in every specimen after ageing is 0.394 mm2. The experiment after ageing is performed on the same parameters and conditions as adopted for the experiment before the ageing of the micromodule. For first specimen, the maximum force withstand by the buffer tube is 6.6 N, the maximum strength (tensile strength) withstand by the buffer tube is 16.7 Mpa. Further, the elongation at break (%) for the first specimen is 188%. For second specimen, the maximum force withstand by the buffer tube is 6.2 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.8 Mpa. Further, the elongation at break (%) for the second specimen is 170%. For third specimen, the maximum force withstand by the buffer tube is 5.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.5 Mpa. Further, the elongation at break (%) for the third specimen is 162%. For fourth specimen, the maximum force withstand by the buffer tube is 5.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.5 Mpa. Further, the elongation at break (%) for the fourth specimen is 143%. For fifth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.7 Mpa. Further, the elongation at break (%) for the fifth specimen is 154%. For sixth specimen, the maximum force withstand by the buffer tube is 5.9 N, the maximum strength (tensile strength) withstand by the buffer tube is 15 Mpa. Further, the elongation at break (%) for the sixth specimen is
Page 70 of 96
163%. For seventh specimen, the maximum force withstand by the buffer tube is 6 N, the maximum strength (tensile strength) withstand by the buffer tube is 15.3 Mpa. Further, the elongation at break (%) for the seventh specimen is 191%. For eighth specimen, the maximum force withstand by the buffer tube is 5.3 N, the maximum strength (tensile strength) withstand by the buffer tube is 13.5 Mpa. Further, the elongation at break (%) for the eighth specimen is 165%. For ninth specimen, the maximum force withstand by the buffer tube is 5.7 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.5 Mpa. Further, the elongation at break (%) for the ninth specimen is 185%. For tenth specimen, the maximum force withstand by the buffer tube is 5.8 N, the maximum strength (tensile strength) withstand by the buffer tube is 14.7 Mpa. Further, the elongation at break (%) for the tenth specimen is 180%. The average maximum force for the 10 specimens is 5.8 N, the average maximum strength (tensile strength) for the 10 specimens is 14.7 Mpa and the average elongation at break for the 10 specimens is 170 %. Standard deviation for the maximum force is 0.4 N. Further, standard deviation for the maximum strength (tensile strength) is 1.1 and the standard deviation for elongation at break % is 16%.
[0086] In yet another embodiment of the present disclosure, the average elongation at break (A%) of the ten specimens of light green buffer tube is (189 ± 16) % at 0 hours of irradiation in SEPAP. In addition, the average elongation at break (A%) of the ten specimens of light green buffer tube is (170 ± 16) % at 350 hours of irradiation in SEPAP. Further, the average tensile strength at break, σrof the ten
Page 71 of 96
specimens of light green buffer tube is (15.5 ± 0.7) MPa at 0 hours of irradiation in SEPAP. Furthermore, the average tensile strength at break, σrof the ten specimens of light green buffer tube is (14.7 ± 1.1) MPa at 350 hours of irradiation in SEPAP. Furthermore, the change in elongation at break (A%) of the light green buffer tube is maximum of 10% for variation between 0 - 350 hours of exposure of UV Mercury Lamp. Furthermore, the tensile strength of the light green buffer tube is maximum of 5% for variation between 0 – 350 hours of exposure of UV Mercury Lamp.
[0087] In an embodiment of the present disclosure, the red buffer tube, the violet buffer tube and the silver buffer tube comply with the requirements of ST/CNET/5843 §8.5 standards. Further, the orange buffer tube, the blue buffer tube and the brown buffer tube comply with the requirements of ST/CNET/5843 §8.5 standards. Furthermore, the black buffer tube, the green buffer tube and the white buffer tube comply with the requirements of ST/CNET/5843 §8.5 standards. Furthermore, the yellow buffer tube, the pink buffer tube, the aqua buffer tube and the light green buffer tube comply with the requirements of ST/CNET/5843 §8.5 standards.
[0088] In an embodiment of the present disclosure, the optical fiber cable 100 includes the first layer 108. The first layer 108 surrounds the plurality of buffer tubes 104a-104e. In an embodiment of the present disclosure, the first layer 108 includes one or more yarns. In addition, the first layer acts as a binding element for the plurality of buffer tubes
Page 72 of 96
104a-104e. In an embodiment of the present disclosure, each of the one or more yarns is a binder yarn. In an embodiment of the present disclosure, the binder yarn is made of polyester. In another embodiment of the present disclosure, the binder yarn is made of aramid. In yet another embodiment of the present disclosure, the binder yarn is made of polypropylene. In an embodiment of the present disclosure, each of the one or more yarns is a yarn thread. In an embodiment of the present disclosure, each of the one or more yarns may be water swellable type for preventing ingression of water.
[0089] In an embodiment of the present disclosure, the binder yarn facilitates absorption of water and moisture. In addition, each of the one or more yarns prevents ingression of the water inside the optical fiber cable 100. In an embodiment of the present disclosure, the optical fiber cable 100 may have any number of yarn threads. In addition, the first layer 108 binds the plurality of buffer tubes 104a-104e. In an embodiment of the present disclosure, the first layer 108 provides retention of the lay length of the plurality of buffer tubes 104a-104e. In an embodiment of the present disclosure, the first layer 108 acts as a strengthening element for the plurality of buffer tubes 104a-104e. In another embodiment of the present disclosure, the first layer 108 may be any type of layer. In an embodiment of the present disclosure, the first layer 108 may have any thickness.
[0090] In an embodiment of the present disclosure, the optical fiber cable 100 includes the second layer 110. The second layer 110 surrounds the first layer 108. In an example, the second layer 110 is a
Page 73 of 96
water blocking layer. In another example, the second layer 110 is a layer of water swellable yarns. In an embodiment of the present disclosure, the second layer 110 prevents the ingression of water inside the optical fiber cable 100. In another embodiment of the present disclosure, the second layer 110 may be any type of layer. In an embodiment of the present disclosure, the second layer 110 may have any thickness as per requirement.
[0091] The optical fiber cable 100 includes the third layer 112. The third layer 112 surrounds the second layer 110. The third layer 112 is an outer jacket of the optical fiber cable 100. In an embodiment of the present disclosure, the third layer 112 is made of polyethylene. In another embodiment of the present disclosure, the third layer 112 is made of any suitable material. In an example, the material includes medium density polyethylene, high density polyethylene, polypropylene, nylon and the like. The third layer 112 layer interacts directly with ambient environment. In addition, the third layer 112 is a sheathing layer. The third layer 112 protects the optical fiber cable 100 against the crush, the bend and tensile stress along the length of the optical fiber cable 100.
[0092] The plurality of buffer tube 104a-104e described in the present disclosure has numerous advantages over the existing arts. The buffer tube of the plurality buffer tubes 104a-104e described in the present disclosure has good molecular bonding as compared to the existing prior arts. The buffer tube of the plurality buffer tubes 104a-104eare gel resistant. Conventional LSZH grades used for tight buffer can be used
Page 74 of 96
to produce micro modules with gel but they are not gel resistant. Gel resistance is ability of buffer tube material to stop leakage of gel onto the surface with ageing. The buffer tube of the plurality buffer tubes 104a-104e has excellent UV resistant properties as compared to the existing prior arts. The buffer tube of the plurality buffer tubes 104a-104e has better crush resistance as compared to the existing prior arts. The buffer tube of the plurality buffer tubes 104a-104e has better physical stability under stresses than the buffer tubes made of thermoplastic elastomers.
[0093] FIG. 3 illustrates another optical fiber cable 300, in accordance with another embodiment of the present disclosure. The optical fiber cable 300 includes plurality of optical fibers 302, plurality of buffer tubes 304, a plurality of water swellable yarns 306a-d, a first layer 308, a second layer 310, a third layer 312 and plurality of embedded strength members 314. The number of plurality of optical fibers 302 present in each of the plurality of buffer tubes 304 is selected from a group A. The group A includes 6 and 12. In an embodiment of the present disclosure, the group A include any other suitable number of pluralities of optical fibers 302. The number of plurality of buffer tubes 304 present in the optical fiber cable 300 is selected from a group B. The group B includes 2, 4, 8, 12, 24, 36 and 60. In an embodiment of the present disclosure, the group B includes any other suitable number of plurality of buffer tubes 304. The plurality of optical fibers 302 present in the optical fiber cable 300 is coloured. The colour of each of the plurality of optical fibers 302 in the optical fiber cable 300 is selected from a group C. The group C includes red, blue, green, yellow, violet, white, orange, gray,
Page 75 of 96
brown, black, aqua and pink. In an embodiment of the present disclosure, the group C includes any other suitable colors of the like. Each of the plurality of buffer tubes 304 in the optical fiber cable 300 is coloured. The colour of each of the plurality of buffer tubes 304 in the optical fiber cable 300 is selected from a group D. The group D includes red, blue, green, light green, yellow, violet, white, orange, gray, brown, black, aqua and pink. In an embodiment of the present disclosure, the group D includes any other suitable colors of the like. In an embodiment of the present disclosure, the plurality of optical fibers 302 has a maximum fiber attenuation of less than equal to 0.36dB/Km at a wavelength of 1310 nanometers when the fibers are of G.652D category. In another embodiment of the present disclosure, the plurality of optical fibers 302 has a maximum fiber attenuation of less than equal to 0.25 dB/Km at a wavelength of 1550 nanometers when the fibers are of G.652D category. In an embodiment of the present disclosure, the plurality of optical fibers 302 has a maximum fiber attenuation of less than equal to 0.36dB/Km at a wavelength of 1310 nanometers when the fibers are of G.657A2 category. In another embodiment of the present disclosure, the plurality of optical fibers 302 has a maximum fiber attenuation of less than equal to 0.23 dB/Km at a wavelength of 1550 nanometers when the fibers are of G.657A2 category. In an embodiment of the present disclosure, the plurality of optical fibers 302 has a polarization mode dispersion of less than equal to 0.2 ps/√km.
[0094] The plurality of buffer tubes 304 are made of Polyolefin based. In an embodiment of the present disclosure, the plurality of buffer tubes
Page 76 of 96
304 is made of any other suitable material. Each of the plurality of buffer tubes 304 encapsulates the plurality of optical fibers 302 and thixotropic gel. The thixotropic gel is filled around the plurality of optical fibers 302 in each of the plurality of buffer tubes 304. The optical fiber cable 300 includes the plurality of water swellable yarns 306a-d along with the plurality of buffer tubes 304 in the core of the optical fiber cable 300. The optical fiber cable 300 includes the first layer 308. The first layer 308 concentrically surrounds the core of the optical fiber cable 300. The first layer 308 extends substantially along the entire length of the optical fiber cable 300. The first layer 308 is of aramid yarn. In an embodiment of the present disclosure, the first layer 308 is of any other suitable material.
[0095] The optical fiber cable 300 includes the second layer 310. The second layer 310 concentrically surrounds the first layer 308 of the optical fiber cable 300. The second layer 310 extends substantially along the entire length of the optical fiber cable 300. The second layer 310 is a water blocking tape. In an embodiment of the present disclosure, the second layer 310 is made of any other suitable material. The optical fiber cable 300 further includes the third layer 312. The third layer 312 concentrically surrounds the second layer 310 of the optical fiber cable 300. The third layer 312 extends substantially along the entire length of the optical fiber cable 300. The third layer 312 is an outer jacket of the optical fiber cable 300. The third layer 312 is made of high density polyethylene. In an embodiment of the present disclosure, the third layer 312 is made of any other suitable material.
Page 77 of 96
The third layer 312 of the optical fiber cable 300 is black in color. The optical fiber cable 300 includes the plurality of embedded strength members 314. The plurality of embedded strength members 314 are embedded in the third layer 312. The plurality of embedded strength members 314 are made of fiber reinforced plastic and provide strength and anti-buckling properties to the optical fiber cable 300. The plurality of strength members 314 are embedded in pairs in the third layer 312. Each pair of the embedded strength member 314 includes two sets of strength members. The two sets of strength members are positioned diametrically opposite in the third layer 312. Each set of the two sets of strength members includes at least one strength member. In an embodiment of the present disclosure, each set of the two set of strength member includes 2 strength members. The optical fiber cable 300 includes a plurality of ripcords 316a-b. The plurality of ripcords 316a-b is embedded between the second layer 310 and the third layer 312. The plurality of ripcords 316a-b is positioned diagonally opposite to each other and extends substantially along the length of the optical fiber cable 300. The plurality of ripcords 316a-b is made of polyester based twisted yarns. In addition, the plurality of ripcords 316a-b is provided for tearing of the outer sheath of the optical fiber cable 300.
[0096] In an embodiment of the present disclosure, the optical fiber cable 300 has a bend radius of 20D during installation and 10D during operation. In an embodiment of the present disclosure, the optical fiber cable 300 has a kink radius of 20D. In an embodiment of the present disclosure, the optical fiber cable 300 has a crush resistance of 2000
Page 78 of 96
N/100mm. In an embodiment of the present disclosure, the optical fiber cable 300 has impact strength of 5Nm. In an embodiment of the present disclosure, the optical fiber cable 300 has torsion of ± 180 degrees. In an embodiment of the present disclosure, the optical fiber cable 300 has a span length of less than 50 m.
[0097] The diameter of the optical fiber cable 300 with 2 buffer tubes and 6 optical fibers in each buffer tube is about 7.2 millimeter ±5%. The diameter of the optical fiber cable 300 with 4 buffer tubes and 6 optical fibers in each buffer tube is about 7.6 millimeter ±5%. The diameter of the optical fiber cable 300 with 8 buffer tubes and 6 optical fibers in each buffer tube is about 9.0 millimeter ±5%. The diameter of the optical fiber cable 300 with 12 buffer tubes and 6 optical fibers in each buffer tube is about 10.8 millimeter ±5%. The diameter of the optical fiber cable 300 with 8 buffer tubes and 12 optical fibers in each buffer tube is about 11.2 millimeter ±5%. The diameter of the optical fiber cable 300 with 12 buffer tubes and 12 optical fibers in each buffer tube is about 12.0 millimeter ±5%. The diameter of the optical fiber cable 300 with 24 buffer tubes and 12 optical fibers in each buffer tube is about 14.0 millimeter ±5%. The diameter of the optical fiber cable 300 with 36 buffer tubes and 12 optical fibers in each buffer tube is about 15.6 millimeter ±5%. The diameter of the optical fiber cable 300 with 60 buffer tubes and 12 optical fibers in each buffer tube is about 18.2 millimeter ±5%. In an embodiment of the present disclosure, the optical fiber cable 300 with 60 buffer tubes includes 5 bundles of buffer tubes with each bundle having 12 buffer tubes bunched by a color
Page 79 of 96
binder. The color binder has a color selected from a group of blue, green, violet, yellow and white. The weight of the optical fiber cable 300 with 2 buffer tubes and 6 optical fibers in each buffer tube is about 40 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 4 buffer tubes and 6 optical fibers in each buffer tube is about 45 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 8 buffer tubes and 6 optical fibers in each buffer tube is about 60 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 12 buffer tubes and 6 optical fibers in each buffer tube is about 80 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 8 buffer tubes and 12 optical fibers in each buffer tube is about 95 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 12 buffer tubes and 12 optical fibers in each buffer tube is about 110 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 24 buffer tubes and 12 optical fibers in each buffer tube is about 144 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 36 buffer tubes and 12 optical fibers in each buffer tube is about 176 kilogram per kilometer ±10%. The weight of the optical fiber cable 300 with 60 buffer tubes and 12 optical fibers in each buffer tube is about 240 kilogram per kilometer ±10%.
[0098] The tensile strength of the optical fiber cable 300 with 2 buffer tubes and 6 optical fibers in each buffer tube during operation is about 400 Newton. The tensile strength of the optical fiber cable 300 with 4 buffer tubes and 6 optical fibers in each buffer tube during operation is about 400 Newton. The tensile strength of the optical fiber cable 300
Page 80 of 96
with 8 buffer tubes and 6 optical fibers in each buffer tube during operation is about 500 Newton. The tensile strength of the optical fiber cable 300 with 12 buffer tubes and 6 optical fibers in each buffer tube during operation is about 800 Newton. The tensile strength of the optical fiber cable 300 with 8 buffer tubes and 12 optical fibers in each buffer tube during operation is about 1100 Newton. The tensile strength of the optical fiber cable 300 with 12 buffer tubes and 12 optical fibers in each buffer tube during operation is about 1150 Newton. The tensile strength of the optical fiber cable 300 with 24 buffer tubes and 12 optical fibers in each buffer tube during operation is about 2000 Newton. The tensile strength of the optical fiber cable 300 with 36 buffer tubes and 12 optical fibers in each buffer tube during operation is about 900 Newton. The tensile strength of the optical fiber cable 300 with 60 buffer tubes and 12 optical fibers in each buffer tube during operation is about 1200 Newton.
[0099] The tensile strength of the optical fiber cable 300 with 2 buffer tubes and 6 optical fibers in each buffer tube during installation is about 1300 Newton. The tensile strength of the optical fiber cable 300 with 4 buffer tubes and 6 optical fibers in each buffer tube during installation is about 1300 Newton. The tensile strength of the optical fiber cable 300 with 8 buffer tubes and 6 optical fibers in each buffer tube during installation is about 1600 Newton. The tensile strength of the optical fiber cable 300 with 12 buffer tubes and 6 optical fibers in each buffer tube during installation is about 2500 Newton. The tensile strength of the optical fiber cable 300 with 8 buffer tubes and 12 optical fibers in
Page 81 of 96
each buffer tube during installation is about 3300 Newton. The tensile strength of the optical fiber cable 300 with 12 buffer tubes and 12 optical fibers in each buffer tube during installation is about 3550 Newton. The tensile strength of the optical fiber cable 300 with 24 buffer tubes and 12 optical fibers in each buffer tube during installation is about 4000 Newton. The tensile strength of the optical fiber cable 300 with 36 buffer tubes and 12 optical fibers in each buffer tube during installation is about 2700 Newton. The tensile strength of the optical fiber cable 300 with 60 buffer tubes and 12 optical fibers in each buffer tube during installation is about 3450 Newton.
[00100] In an embodiment of the present disclosure, the optical fiber cable 300 with 432 optical fibers and 720 optical fibers is used for duct application only. In an embodiment of the present disclosure, the optical fiber cable 300 with optical fibers greater than 288 includes G657A2 category fibers only. In an embodiment of the present disclosure, the optical fiber cable 300 with optical fibers less than or equal to 288 includes G652D category fibers. In an embodiment of the present disclosure, the optical fiber cable 300 with optical fibers less than or equal to 288 may include G657A1 category fibers. In an embodiment of the present disclosure, the optical fiber cable 300 with optical fibers less than or equal to 288 may include G652A2 category fibers. In an embodiment of the present disclosure, the optical fiber cable 300 with optical fibers less than or equal to 288 may include any other suitable category fibers based on specific customer requirement.
Page 82 of 96
[00101] FIG. 4 illustrates yet another optical fiber cable 400, in accordance with yet another embodiment of the present disclosure. The optical fiber cable 400 includes a plurality of optical fibers 402, plurality of buffer tubes 404, a plurality of water swellable yarns 406a-c, a first layer 408, a second layer 410, a third layer 412 and plurality of embedded strength members 414. The number of plurality of optical fibers 402 present in each of the plurality of buffer tubes 404 is 12. In an embodiment of the present disclosure, the buffer tubes include any other suitable number of plurality of optical fibers 402. The number of plurality of optical fibers 402 present in the optical fiber cable 400 is selected from a group A. The group A includes 12. In an embodiment of the present disclosure, the group A includes any other suitable number of plurality of optical fibers 402. The plurality of optical fibers 402 present in the optical fiber cable 400 is coloured. The colour of each of the plurality of optical fibers 402 in the optical fiber cable 400 is selected from a group C. The group C includes red, blue, green, yellow, violet, white, orange, gray, brown, black, aqua and pink. In an embodiment of the present disclosure, the group C includes any other suitable colors of the like. Each of the plurality of buffer tubes 404 in the optical fiber cable 400 is coloured. The colour of each of the plurality of buffer tubes 404 in the optical fiber cable 400 is selected from a group D. The group D includes red, blue, green, light green, yellow, violet, white, orange, gray, brown, black, aqua and pink. In an embodiment of the present disclosure, the group D includes any other suitable colors of the like. In an embodiment of the present disclosure, the plurality of optical fibers 402 has a maximum fiber attenuation of less than equal to 0.36 dB/Km at a wavelength of 1310 nanometers. In
Page 83 of 96
another embodiment of the present disclosure, the plurality of optical fibers 402 has a maximum fiber attenuation of less than equal to 0.25 dB/Km at a wavelength of 1550 nanometers. In an embodiment of the present disclosure, the plurality of optical fibers 402 has a polarization mode dispersion of less than equal to 0.2ps/√km.
[00102] The plurality of buffer tubes 404 are made of Polyolefin based. In an embodiment of the present disclosure, the plurality of buffer tubes 404 is made of any other suitable material. Each of the plurality of buffer tubes 404 encapsulates the plurality of optical fibers 402 and thixotropic gel. The thixotropic gel is filled around the plurality of optical fibers 402 in each of the plurality of buffer tubes 404. The optical fiber cable 400 includes the plurality of water swellable yarns 406a-c around the plurality of buffer tubes 404 in the core of the optical fiber cable 400. The optical fiber cable 400 includes the first layer 408. The first layer 408 concentrically surrounds the core of the optical fiber cable 400. The first layer 408 extends substantially along the entire length of the optical fiber cable 400. The first layer 408 is made of aramid yarn. In an embodiment of the present disclosure, the first layer 408 is made of any other suitable material.
[00103] The optical fiber cable 400 includes the second layer 410. The second layer 410 concentrically surrounds the first layer 408 of the optical fiber cable 400. The second layer 410 extends substantially along the entire length of the optical fiber cable 400. The second layer
Page 84 of 96
410 is a water blocking tape. In an embodiment of the present disclosure, the second layer 410 is made of any other suitable material. The optical fiber cable 400 further includes the third layer 412. The third layer 412 concentrically surrounds the second layer 410 of the optical fiber cable 400. The third layer 412 extends substantially along the entire length of the optical fiber cable 400. The third layer 412 is an outer jacket of the optical fiber cable 400. The third layer 412 is made of high density polyethylene. In an embodiment of the present disclosure, the third layer 412 is made of any other suitable material. The third layer 412 of the optical fiber cable 400 is black in color. In an embodiment of the present disclosure, the third layer 412 has a thickness of greater than equal to 1.0 millimeter. The optical fiber cable 400 includes the plurality of embedded strength members 414a-b. The plurality of embedded strength members 414a-b are embedded in the third layer 412 and diagonally opposite to each other. The plurality of embedded strength members 414a-b are made of fiber reinforced plastic and provide strength and anti-buckling properties to the optical fiber cable 400. The optical fiber cable 400 includes a plurality of ripcords 416a-b. The plurality of ripcords 416a-b is embedded between the second layer 410 and the third layer 412. The plurality of ripcords 416a-b is positioned diagonally opposite to each other and extends substantially along the length of the optical fiber cable 400. The plurality of ripcords 416a-b is made of polyester based twisted yarns. In addition, the plurality of ripcords 416a-b is provided for tearing of the outer sheath of the optical fiber cable 400.
Page 85 of 96
[00104] In an embodiment of the present disclosure, the optical fiber cable 400 has a bend radius of 20D during installation and 10D during operation. In an embodiment of the present disclosure, the optical fiber cable 400 has a kink radius of 20D. In an embodiment of the present disclosure, the optical fiber cable 400 has a crush resistance of 2000 N/100mm. In an embodiment of the present disclosure, the optical fiber cable 400 has impact strength of 5Nm. In an embodiment of the present disclosure, the optical fiber cable 400 has torsion of ± 180 degrees.
[00105] The diameter of the optical fiber cable 400 with 3 buffer tubes and 12 optical fibers in each buffer tube is about 7.8 millimeters ±5%. The diameter of the optical fiber cable 400 with 6 buffer tubes and 12 optical fibers in each buffer tube is about 10 millimeters ±5%. The diameter of the optical fiber cable 400 with 12 buffer tubes and 12 optical fibers in each buffer tube is about11.5 millimeter ±5%. The weight of the optical fiber cable 400 with 3 buffer tubes and 12 optical fibers in each buffer tube is about 47 kilogram per kilometer ±10%. The weight of the optical fiber cable 400 with 6 buffer tubes and 12 optical fibers in each buffer tube is about 70 kilogram per kilometer ±10%. The weight of the optical fiber cable 400 with 12 buffer tubes and 12 optical fibers in each buffer tube is about 96 kilogram per kilometer ±10%.
[00106] The maximum tensile strength of the optical fiber cable 400 with 3 buffer tubes and 12 optical fibers in each buffer tube is about 1200 Newton. The maximum tensile strength of the optical fiber cable
Page 86 of 96
400 with 6 buffer tubes and 12 optical fibers in each buffer tube is about 1600 Newton. The tensile strength of the optical fiber cable 400 with 12 buffer tubes and 12 optical fibers in each buffer tube is about 2500 Newton.
[00107] In an embodiment of the present disclosure, the optical fiber cable 400 with 4 buffer tubes and 12 optical fibers in each buffer tube has a maximum tensile strength of 1200 N. In another embodiment of the present disclosure, the optical fiber cable 400 with 12 buffer tubes and 12 optical fibers in each buffer tube has a maximum tensile strength of 2200 N. In yet another embodiment of the present disclosure, the optical fiber cable 400 with 24 buffer tubes and 12 optical fibers in each buffer tube has a maximum tensile strength of 2500 N.
[00108] The diameter of the optical fiber cable 400 with 4 buffer tubes and 12 optical fibers in each buffer tube is less than equal to 8.5 millimeters. The diameter of the optical fiber cable 400 with 12 buffer tubes and 12 optical fibers in each buffer tube is less than equal to 12 millimeters. The diameter of the optical fiber cable 400 with 24 buffer tubes and 12 optical fibers in each buffer tube is less than equal to 15 millimeters. The weight of the optical fiber cable 400 with 4 buffer tubes and 12 optical fibers in each buffer tube is about 50 kilograms per kilometer ±5%. The weight of the optical fiber cable 400 with 12 buffer tubes and 12 optical fibers in each buffer tube is about 95 kilograms per kilometer ±5%. The weight of the optical fiber cable 400 with 24 buffer
Page 87 of 96
tubes and 12 optical fibers in each buffer tube is about 142 kilograms per kilometer ±10%.
[00109] FIG. 5 illustrates yet another optical fiber cable 500, in accordance with yet another embodiment of the present disclosure. The optical fiber cable 500 includes a plurality of optical fibers 502, plurality of buffer tubes 504, a plurality of water swellable yarns 506a-c, a first layer 508, a second layer 510, a third layer 512 and plurality of embedded strength members 514a-b. The number of plurality of optical fibers 502 present in each of the plurality of buffer tubes 504 is 6. In an embodiment of the present disclosure, the buffer tubes include any other suitable number of plurality of optical fibers 502. The number of plurality of buffer tubes 504 present in the optical fiber cable 500 is selected from a group B. The group B includes 4, 6, 8, 12, 16 and 24. In an embodiment of the present disclosure, the group B includes any other suitable number of plurality of buffer tubes 504. The plurality of optical fibers 502 present in the optical fiber cable 500 is coloured. The colour of each of the plurality of optical fibers 502 in the optical fiber cable 500 is selected from a group C. The group C includes red, blue, green, yellow, violet, white, orange, gray, brown, black, aqua and pink. In an embodiment of the present disclosure, the group C includes any other suitable colors of the like. Each of the plurality of buffer tubes 504 in the optical fiber cable 500 is coloured. The colour of each of the plurality of buffer tubes 504 in the optical fiber cable 500 is selected from a group D. The group D includes red, blue, green, light green, yellow, violet, white, orange, gray, brown, black, aqua and pink. In an
Page 88 of 96
embodiment of the present disclosure, the group D includes any other suitable colors of the like. In an embodiment of the present disclosure, the plurality of optical fibers 502 has a maximum fiber attenuation of less than equal to 0.36 dB/Km at a wavelength of 1310 nanometers. In another embodiment of the present disclosure, the plurality of optical fibers 502 has a fiber attenuation of less than equal to 0.23dB/Km at a wavelength of 1550 nanometers. In an embodiment of the present disclosure, the plurality of optical fibers 502 has a fiber attenuation of 90 % fiber of less than equal to 0.22dB/Km at a wavelength of 1550 nanometers. In another embodiment of the present disclosure, the plurality of optical fibers 502 has a fiber attenuation of 90 % fiber of less than equal to 0.24dB/Km at a wavelength of 1625 nanometers. In an embodiment of the present disclosure, the plurality of optical fibers 502 has a polarization mode dispersion of less than equal to 0.2ps/√km. In an embodiment of the present disclosure, the plurality of optical fibers 502 has a polarization mode dispersion link of less than equal to 0.08ps/√km.
[00110] The plurality of buffer tubes 504 are made of Polyolefin based. In an embodiment of the present disclosure, the plurality of buffer tubes 504 is made of any other suitable material. Each of the plurality of buffer tubes 504 encapsulates the plurality of optical fibers 502 and thixotropic gel. The thixotropic gel is filled around the plurality of optical fibers 502 in each of the plurality of buffer tubes 504. The optical fiber cable 500 includes the plurality of water swellable yarns 506a-c around the plurality of buffer tubes 504 in the core of the optical
Page 89 of 96
fiber cable 500. The optical fiber cable 500 includes the first layer 508. The first layer 508 concentrically surrounds the core of the optical fiber cable 500. The first layer 508 extends substantially along the entire length of the optical fiber cable 500. The first layer 508 is made of aramid yarn. In an embodiment of the present disclosure, the first layer 508 is made of any other suitable material.
[00111] The optical fiber cable 500 includes the second layer 510. The second layer 510 concentrically surrounds the first layer 508 of the optical fiber cable 500. The second layer 510 extends substantially along the entire length of the optical fiber cable 500. The second layer 510 is a water blocking tape. In an embodiment of the present disclosure, the second layer 510 is made of any other suitable material. The optical fiber cable 500 further includes the third layer 512. The third layer 512 concentrically surrounds the second layer 510 of the optical fiber cable 500. The third layer 512 extends substantially along the entire length of the optical fiber cable 500. The third layer 512 is an outer jacket of the optical fiber cable 500. The third layer 512 is made of high density polyethylene. In an embodiment of the present disclosure, the third layer 512 is made of any other suitable material. The third layer 512 of the optical fiber cable 500 is black in color. In an embodiment of the present disclosure, the third layer 512 has a thickness of greater than equal to 1.0 millimeter. The optical fiber cable 500 includes the plurality of embedded strength members 514a-b. The plurality of embedded strength members 514a-b are embedded in the third layer 512 and diagonally opposite to each other. The plurality of
Page 90 of 96
embedded strength members 514a-b are made of fiber reinforced plastic and provide strength and anti-buckling properties to the optical fiber cable 500. The optical fiber cable 500 includes a plurality of ripcords 516a-b. The plurality of ripcords 516a-b is embedded between the second layer 510 and the third layer 512. The plurality of ripcords 516a-b is positioned diagonally opposite to each other and extends substantially along the length of the optical fiber cable 500. The plurality of ripcords 516a-b is made of polyester based twisted yarns. In addition, the plurality of ripcords 516a-b is provided for tearing of the outer sheath of the optical fiber cable 500.
[00112] In an embodiment of the present disclosure, the optical fiber cable 500 has a bend radius of 20D during installation and 10D during operation. In an embodiment of the present disclosure, the optical fiber cable 500 has a kink radius of 20D. In an embodiment of the present disclosure, the optical fiber cable 500 has a crush resistance of 2000 N/100mm. In an embodiment of the present disclosure, the optical fiber cable 500 has impact strength of 5Nm. In an embodiment of the present disclosure, the optical fiber cable 500 has torsion of ± 180 degrees.
[00113] The diameter of the optical fiber cable 500 with 4 buffer tubes and 6 optical fibers in each buffer tube is about 7.6 millimeters ±5%. The diameter of the optical fiber cable 500 with 6 buffer tubes and 6 optical fibers in each buffer tube is about 8.2 millimeters ±5%. The diameter of the optical fiber cable 500 with 8 buffer tubes and 6 optical
Page 91 of 96
fibers in each buffer tube is about 8.5 millimeter ±5%. The diameter of the optical fiber cable 500 with 12 buffer tubes and 6 optical fibers in each buffer tube is about 10.7 millimeters ±5%. The diameter of the optical fiber cable 500 with 16 buffer tubes and 6 optical fibers in each buffer tube is about 11.6 millimeters ±5%. The diameter of the optical fiber cable 500 with 24 buffer tubes and 6 optical fibers in each buffer tube is about 13.0 millimeters ±5%. The weight of the optical fiber cable 500 with 4 buffer tubes and 6 optical fibers in each buffer tube is about 45 kilogram per kilometer ±10%. The weight of the optical fiber cable 500 with 6 buffer tubes and 6 optical fibers in each buffer tube is about 52 kilograms per kilometer ±10%. The weight of the optical fiber cable 500 with 8 buffer tubes and 6 optical fibers in each buffer tube is about 61 kilograms per kilometer ±10%. The weight of the optical fiber cable 500 with 12 buffer tubes and 6 optical fibers in each buffer tube is about 84 kilograms per kilometer ±10%. The weight of the optical fiber cable 500 with 16 buffer tubes and 6 optical fibers in each buffer tube is about 95 kilograms per kilometer ±10%. The weight of the optical fiber cable 500 with 24 buffer tubes and 6 optical fibers in each buffer tube is about 115 kilogram per kilometer ±10%.
[00114] The maximum tensile strength of the optical fiber cable 500 with 4 buffer tubes and 6 optical fibers in each buffer tube is about 1200 Newton. The maximum tensile strength of the optical fiber cable 500 with 6 buffer tubes and 6 optical fibers in each buffer tube is about 1200 Newton. The tensile strength of the optical fiber cable 500 with 8 buffer tubes and 6 optical fibers in each buffer tube is about 1200 Newton.
Page 92 of 96
The maximum tensile strength of the optical fiber cable 500 with 12 buffer tubes and 6 optical fibers in each buffer tube is about 2000 Newton. The maximum tensile strength of the optical fiber cable 500 with 16 buffer tubes and 6 optical fibers in each buffer tube is about 2500 Newton. The maximum tensile strength of the optical fiber cable 500 with 24 buffer tubes and 6 optical fibers in each buffer tube is about 2500 Newton.
[00115] The foregoing descriptions of pre-defined embodiments of the present technology have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present technology to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the present technology and its practical application, to thereby enable others skilled in the art to best utilize the present technology and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the spirit or scope of the claims of the present technology.
Page 93 of 96

Claims
What is claimed is:
1. An optical fiber cable (100) comprising:
a plurality of optical fibers (106a-106e) substantially along a longitudinal axis (114) of the optical fiber cable (100);
a plurality of buffer tubes (104a-104e) lying substantially along the longitudinal axis (114) of the optical fiber cable (100), wherein the plurality of buffer tubes (104a-104e) encloses the plurality of optical fibers (106a-106e), wherein each of the plurality of buffer tubes is made of polyolefin material, wherein the Polyolefin based material has a density of 1.4 grams per cubic centimetres at a temperature of about 23 degree Celsius, wherein the Polyolefin based material has a hardness of 57 shore D per 15 seconds, wherein the Polyolefin material has a water absorption of about 0.3 milligrams per square centimetres tested for 10 days at a temperature of 70 degree Celsius, wherein the Polyolefin based material has a conductivity of 0.8 micro-Siemens per millimetre and wherein the polyolefin based material has elongation of 60 percent at a lower temperature of -20 degree Celsius; and
a jacket (112) surrounding the plurality of buffer tubes (104a-104e).
2. The optical fiber cable (100) as recited in claim 1, wherein the plurality of buffer tubes (104a-104e) are tested using a device equipped with four
Page 94 of 96
400 W medium pressure lamps having bulbs made of borosilicate glass which filters wavelengths below 295 nanometers, wherein irradiance measured at a surface of each of the plurality of buffer tubes (104a-104e) is about 95 Wm2 in a range of 300 nanometers to 400 nanometers, wherein each buffer tube is fixed on a rotating carousel for homogeneous irradiation and wherein the plurality of buffer tubes (104a-104e) are exposed at a temperature of 60 degree Celsius.
3. The optical fiber cable (100) as recited in claim 1, wherein the optical fiber cable (100) comprises a central strength member (102), and wherein the central strength member (102) is made of fiber reinforced plastic.
4. The optical fiber cable (100) as recited in claim 1 further comprising one or more binder yarns between the plurality of buffer tubes (104a-104e) and the jacket (112), wherein the one or more binder yarns are made of a material selected from a group of polymers consisting of polyester, aramid and polypropylene.
5. The optical fiber cable (100) as recited in claim 1, wherein the jacket (112) is made of a material selected from a group of polymers consisting of medium density polyethylene, high density polyethylene and nylon.
6. The optical fiber cable (100) as recited in claim 1, wherein the polyolefin based material has a tensile strength of about 14 MPa.
Page 95 of 96
7. The optical fiber cable (100) as recited in claim 1, wherein the polyolefin based material has 160 percent of elongation at break point.
8. The optical fiber cable (100) as recited in claim 1, wherein the polyolefin based material has a melt flow index of about 8 grams per 10 minutes at a temperature of 150 degree Celsius and under load of 21.6 kilograms.
9. The optical fiber cable (100) as recited in claim 1, wherein the polyolefin based material has elongation of 140 percent after ageing at 136 degrees Celsius for 10 days.
10. The optical fiber cable (100) as recited in claim 1, wherein the polyolefin based material does not have fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
11. The optical fiber cable (100) as recited in claim 1, wherein the polyolefin based material has a limiting oxygen index of 34 percent.
12. The optical fiber cable (100) as recited in claim 1, wherein the polyolefin based material is low smoke zero halogen.