Title of Invention: Super absorbent hydrogel complex shredding device
technical field
[One]
Cross-Citation with Related Application(s)
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0150705 filed on November 21, 2019, and all contents disclosed in the literature of the Korean patent application are incorporated as a part of this specification.
[3]
The present invention relates to a superabsorbent hydrogel complex shredding device capable of smooth shredding of the hydrogel.
background
[4]
Super Absorbent Polymer (SAP) is a synthetic polymer material that can absorb water 500 to 1,000 times its own weight. Material), etc., are named differently.
[5]
The superabsorbent polymer as described above has started to be put to practical use as a sanitary tool, and now, in addition to hygiene products such as paper diapers for children, a soil repair agent for gardening, a water-retaining material for civil engineering and construction, a sheet for seedlings, a freshness maintenance agent in the food distribution field, and It is widely used as a material for poultice, etc.
[6]
As a method for producing the superabsorbent polymer as described above, a method by reverse-phase suspension polymerization or a method by aqueous solution polymerization, etc. are known. Reverse phase suspension polymerization is disclosed in, for example, Japanese Patent Application Laid-Open No. 56-161408, Japanese Unexamined Patent Application Publication No. 57-158209, and Japanese Patent Application Laid-Open No. 57-198714. As the method using aqueous solution polymerization, thermal polymerization is performed while the hydrogel polymer is broken and cooled in a kneader equipped with several axes, and photopolymerization is performed simultaneously with polymerization and drying by irradiating a high-concentration aqueous solution with ultraviolet rays on a belt. methods and the like are known.
[7]
The hydrogel or hydrogel polymer obtained through the polymerization reaction as described above is generally marketed as a powdery product after being pulverized through a drying process. In order to efficiently proceed with the drying step as described above, it is important to increase the surface area of ​​the hydrogel polymer as much as possible. Therefore, in order to increase the surface area of ​​the hydrogel polymer before the drying process, a method of increasing the surface area of ​​the hydrogel polymer to be dried by simply pulverizing the hydrogel polymer polymerized through thermal polymerization or photopolymerization may be considered. In order to increase the surface area of ​​the hydrogel polymer as described above, a process of firstly pulverizing the hydrogel polymer after polymerization is disclosed.
[8]
A chopper is mainly used in the first crushing process of the hydrogel.
[9]
This chopper includes a screw for moving the hydrogel, a barrel including a spiral, a cutter blade for cutting the hydrogel, and a perforated plate through which the cut hydrogel is discharged.
[10]
Here, since the cutter blade and the perforated plate are each installed as one, there is a problem in that it is difficult to cut the size of the particles to be minced of the hydrogel to less than the set size. In addition, even when the particle size is reduced to less than the set size by repeating the mincing process, the minced gel with a very small particle size raises the pressure in the chopper to generate a kneading phenomenon, increasing extractable content (EC) And there is a problem that can cause a change in physical properties.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[11]
An embodiment of the present invention is to provide a superabsorbent polymer hydrogel shredding apparatus capable of shredding the hydrogel to a small size less than a set size and improving the manufacturing quality.
means of solving the problem
[12]
In one embodiment of the present invention, a transfer space to which the hydrogel is transferred is formed therein and a discharge part is formed on the side thereof, a transfer unit installed in the barrel body to transfer the hydrogel in the transfer space, and a function installed in the transfer unit It includes a plurality of mincing modules for pulverizing the gel and discharging it to the outside of the discharge unit in a minced state.
[13]
The shredding module may include a cutter member installed inside the barrel body to pulverize the hydrogel transferred by the transfer unit, and a perforated plate for discharging the hydrogel pulverized by the cutter member in a minced state.
[14]
The transfer unit may include a screw member that is rotatably installed in the transfer space to move the hydrogel, and a driving motor that provides a rotational driving force to the screw member.
[15]
The plurality of thinning modules may be installed to be spaced apart from each other in the direction of the discharge part from the screw member.
[16]
A plurality of fine cut holes for discharging the hydrogel in a minced state are formed in the plurality of perforated plates, and the fine cut holes may be respectively formed in the plurality of perforated plates with different diameters.
[17]
The small hole may be formed with a minimum diameter at the location of the discharge part among the plurality of perforated plates.
[18]
The threads of the screw member may be formed to have the same pitch.
Effects of the Invention
[19]
According to an embodiment of the present invention, a perforated plate and a cutter member are installed, and the size of the fine cut holes formed in each of the plurality of perforated plates is gradually reduced in the direction of the discharge part, so that the water-containing gel can be smoothly cut process and set size It is possible to smoothly cut the hydrogel with a small size of the following size.
Brief description of the drawing
[20]
1 is a perspective view schematically showing a superabsorbent hydrogel complex mincing device according to a first embodiment of the present invention.
[21]
FIG. 2 is a schematic side view of the superabsorbent hydrogel complex mincing device of FIG. 1. FIG.
[22]
FIG. 3 is a cross-sectional view schematically showing the superabsorbent hydrogel complex mincing device of FIG. 1 .
[23]
4 is a view schematically illustrating a state in which a plurality of perforated plates are installed inside the barrel body according to the first embodiment of the present invention.
[24]
5 is a view schematically showing the state of minced at a temperature of 40 ℃ of the conventional hydrogel.
[25]
6 is a view schematically showing the minced state at a temperature of 80° C. of the hydrogel according to the second embodiment of the present invention.
[26]
7 is a view schematically illustrating a state in which pitches of screw members are formed at equal intervals according to a third embodiment of the present invention.
[27]
8 is an enlarged view schematically illustrating a state in which kneading occurs in a hydrogel according to the prior art.
[28]
9 is an enlarged view of the fragmented particles of the hydrogel using a screw member having an equally spaced pitch according to a fourth embodiment of the present invention.
Best mode for carrying out the invention
[29]
Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.
[30]
1 is a perspective view schematically showing a superabsorbent hydrogel complex mincing device according to a first embodiment of the present invention, FIG. 2 is a schematic side view of the superabsorbent hydrogel complex mincing device of FIG. 1, and FIG. 3 is a cross-sectional view schematically showing the superabsorbent hydrogel complex mincing device of FIG. 1 .
[31]
1 to 3, the superabsorbent hydrogel complex mincing apparatus 100 according to the first embodiment of the present invention has a barrel body ( 10), a transfer unit 20 installed in the barrel body 10 to transfer the hydrogel in the transfer space 11, and a barrel body 10 installed in the transfer unit 20 to pulverize the hydrogel and cut into pieces It includes a plurality of segmentation modules 30 discharged to the outside of the.
[32]
The barrel body 10 may be installed in a state supported by the bottom surface in a state in which the transfer space 11 to which the hydrogel is transferred therein is formed along the longitudinal direction.
[33]
An input unit 12 for injecting hydrogel into the transfer space 11 may be installed at an upper portion of the barrel body 10 in an opened state.
[34]
A support base 13 may protrude from the lower portion of the barrel body 10 for stable support on the bottom surface.
[35]
It is also possible that the barrel spiral 15 protrudes from the inside of the barrel body 10 .
[36]
The barrel spiral 15 may be formed to protrude in a spiral shape from the inner wall surface of the barrel body 10 to correspond to the spiral shape of the screw member 21 .
[37]
The barrel spiral 15 may be formed to protrude from the inner wall surface of the barrel body 10 in a plurality of spiral shapes in opposite directions to correspond to the spiral shape of the screw member 21 .
[38]
In the present embodiment, the barrel spiral 15 is exemplarily described as protruding from the inner wall surface of the barrel body 10, but the present invention is not necessarily limited thereto.
[39]
The barrel spiral 15 is not necessarily limited to a spiral shape, and may include concentric band-like projections on the inner wall surface of the barrel body 10 or spherical or angular projections protruding corresponding to the spiral position of the screw member 21 , etc. It is also possible to apply changes.
[40]
As described above, since the barrel spiral 15 is formed to protrude inside the barrel body 10 , it is possible to stably transport the hydrogel without backflow along with the shredding auxiliary action of the hydrogel.
[41]
The hydrogel may be transferred by a transfer operation of the transfer unit 20 to be described later in a state in which the hydrogel is introduced into the barrel body 10 through the input unit 12 .
[42]
The input part 12 is formed in an opened state at the upper side of the barrel body 10, and may be installed in an upwardly expanded state so that the hydrogel can be easily introduced therein.
[43]
In this way, the hydrogel can be transported in the direction of the discharge part 14 of the barrel body 10 by the driving force of the transport part 20 in a state in which the hydrogel is put into the barrel body 10 to be properly pulverized.
[44]
The transfer unit 20 is installed in the barrel body 10 and may be installed to provide a transfer driving force for transfer of the hydrogel.
[45]
More specifically, the transfer unit 20 includes a screw member 21 that is rotatably installed in the transfer space 11 to move the hydrogel, and a driving motor 23 that provides rotational driving force to the screw member 21 . ) may be included.
[46]
The screw member 21 is rotatably installed in the longitudinal direction of the transfer space 11 inside the barrel body 10 , and is rotated by the driving operation of the driving motor 23 to enter the transfer space 11 . It may be installed to transport the filled hydrogel in the direction of the discharge part 14 of the barrel body 10 .
[47]
The driving motor 23 is installed in the barrel body 10 and the driving shaft is installed at one end of the screw member 21 , and by rotating the screw member 21 in one direction, the hydrogel is removed from the inside of the barrel body 10 . It may be installed to provide a rotational driving force to be transported while maintaining an appropriate transport speed.
[48]
The driving motor 23 and the screw member 21 may be installed to transmit rotational driving force through a speed reducer (not shown).
[49]
On the other hand, the screw member 21 may be provided with a mincing module 30 for pulverizing the hydrogel and discharging it to the outside of the discharge unit 14 in a minced state.
[50]
A plurality of such thinning modules 30 may be installed along the longitudinal direction of the screw member 21 .
[51]
As described above, the reason that a plurality of shredding modules 30 are installed on the screw member 21 is to maintain the size of the shredded particles of the hydrogel at an appropriate size to enable smooth shredding.
[52]
More specifically, the shredding module 30 is installed in the barrel body 10 by a cutter member 31 for crushing the hydrogel transferred by the transfer unit 20, and the cutter member 31 It may include a perforated plate 33 for discharging the pulverized hydrogel in a minced state. A plurality of such thinning modules 30 may be installed in a state spaced apart from each other along the longitudinal direction of the screw member 21 .
[53]
The cutter member 31 may be rotatably installed together with the rotational operation of the screw member 21 to properly pulverize the hydrogel transferred from the transport space 11 by the screw member 21 .
[54]
A plurality of cutter members 31 may be installed on the screw member 21 with the perforated plate 33 interposed therebetween since a plurality of cutting modules 30 are installed.
[55]
The perforated plate 33 may be respectively installed between the plurality of cutter members 31 and at the position of the discharge part 14 of the barrel body 10 . A plurality of small holes may be formed in the perforated plate 33 .
[56]
Accordingly, the hydrogel pulverized by the cutter member 31 is pressed and moved inside the barrel body 10 by the pressing force generated by the rotational operation of the screw member 21 , and the small hole in the perforated plate 33 . It can be stably discharged in a minced state.
[57]
Here, a surfactant may be added to the inside of the barrel body 10 . The surfactant may enable a smoother shredding action in the process in which the hydrogel is pulverized by the cutter member 31 and shredded through the fine slits of the perforated plate 33 .
[58]
The perforated plate 33 may be formed of a heat-treated metal material to stably support the pressing force of the hydrogel.
[59]
4 is a view schematically illustrating a state in which a plurality of perforated plates are installed inside the barrel body according to the first embodiment of the present invention.
[60]
As shown in FIG. 4 , the small cut holes 33a formed in the perforated plate 33 may be respectively formed in different sizes of diameters in each of the plurality of perforated plates 33 . 4 is a schematic view showing only the perforated plate 33 installed inside the barrel body 10 .
[61]
That is, the perforated plate 33 is arranged in plurality in a state spaced apart from each other at regular intervals along the longitudinal direction of the screw member 21 , and the small cut holes 33a are discharged from each of the plural perforated plates 33 . It may be formed in a state in which the diameter is gradually reduced in the direction of the portion 14 .
[62]
As such, the small hole 33a is formed with the largest diameter in the perforated plate 33 at the position A closest to the driving motor 23 in the inside of the barrel body 10 among the plurality of perforated plates 33 and , may be formed with a minimum diameter in the perforated plate 33 of the position (B) closest to the discharge portion (14).
[63]
As described above, in the superabsorbent hydrogel complex shredding apparatus 100 of this embodiment, the perforated plate 33 and the cutter member 31 are installed in plurality along the longitudinal direction of the screw member 21, and a plurality of perforated plates By gradually decreasing the size of the fine cut holes 33a formed in each of (33) in the direction of the discharge part 14, the process of shredding the hydrogel is made more smoothly and the size of the hydrogel is reduced to a small size of several millimeters or less. It is also possible to cut
[64]
Example 1
[65]
Example 1 is 100 g of acrylic acid, 32% caustic soda (NaOH) 123.5 g, sodium persulfate 0.2 g as a thermal polymerization initiator, diphenyl (2,4,6 trimethylbenzoyl) phosphine oxide 0.008 g as a photoinitiator, polyethylene A monomer composition having a total solids concentration of 45.0 wt% was prepared by mixing 0.26 g of glycol diacrylate (PEGDA) and 40.0 g of water.
[66]
Here, the monomer composition was supplied to the ultraviolet irradiation device and at the same time, the polymerization reaction was carried out for 60 seconds by irradiating ultraviolet rays having an intensity of 10 mW/cm^2. After the polymerization reaction proceeds, 0.3 g of a hydrophobic surfactant (SPAN 60) is applied to the prepared polymerization sheet, cut using a chopper having equal spacing screws, and dried using a rotary dryer at a speed of 300 RPM to dry the final hydrogel A sample was obtained.
[67]
Comparative Example 1
[68]
[Table 1]
[69]
As shown in Table 1 above, it can be confirmed that the average particle size is reduced when the hydrogel is passed through the perforated plate 13 times, and when the hydrogel of Example 1 is passed through a plurality of perforated plates through Comparative Example 1 It can be seen that the average particle size is reduced when the hydrogel is chopped.
[70]
Example 2 and Comparative Example 2
[71]
As shown in Table 2 below, the type of the hydrophobic surfactant of Example 1 was changed to SA (stearic acid series), and in the comparative example, the temperature of the mincing process was changed to 40 ° C. At 40 ° C, severe kneading was produced. And it was confirmed that the measurement was impossible.
[72]
[Table 2]
[73]
In Table 2, CRC is a centrifugal retention capacity (CRC), and EC is an extractable content (EC).
[74]
5 is a poor state of the shredded state of the hydrogel 110 when the temperature of the polymer sheet is 40 ° C., FIG. 6 shows that when the temperature of the polymer sheet is 80 ° C., kneading occurs in the hydrogel 110. has not been
[75]
7 is a view schematically illustrating a state in which pitches of screw members are formed at equal intervals according to a third embodiment of the present invention. A detailed description of the same reference numerals as those of FIGS. 1 to 6 will be omitted.
[76]
7, the pitch P of the screw member 121 according to the third embodiment of the present invention may be formed to protrude at the same pitch at equal intervals. Therefore, the minced particles of the hydrogel can be minced in a good state without kneading.
[77]
Table 3 below shows the process of shredding the hydrogel using the screw member of Example 3 having a pitch equal to that of a general screw.
[78]
[Table 3]
[79]
8 is an enlarged view of the main part showing the shredded particles of the hydrogel by using a conventional screw member, and FIG. It is an enlarged view of the main part showing the particle enlarged.
[80]
As shown in FIG. 8, in the conventional screw member, a kneading phenomenon occurs in the hydrogel 210, and as shown in FIG. 9, in the fourth embodiment of the present invention, the kneading phenomenon occurs in the hydrogel 210. It can be confirmed that this does not occur. In addition, as shown in Table 3, the effect of reducing EC can be confirmed.
[81]
That is, as shown in FIG. 9 , when a screw member having an equally spaced pitch is used, a pressure drop occurs so that kneading of the hydrogel particles does not occur and the extractable content (EC) A reduction effect is also possible.
[82]
Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and variations are possible within the scope of the claims, the detailed description of the invention, and the accompanying drawings, and this also It is natural to fall within the scope of
[83]
(Explanation of symbols)
[84]
10...Barrel body 11...Transfer space
[85]
12...Injection part 13...Support base part
[86]
14...discharge part 15...barrel spiral
[87]
20...Transfer 21, 121...Screw member
[88]
23...drive motor 30...segment module
[89]
31...Cutter member 33...Perforated plate
[90]
33a. Fine cut hole 110, 210. Hydrogel
Claims
[Claim 1]
a barrel body having a transport space in which the hydrogel is transported and a discharge part formed on the side thereof; a transfer unit installed on the barrel body to transfer the hydrogel in the transfer space; and a plurality of mincing modules installed in the transfer unit to pulverize the hydrogel and discharge it to the outside of the discharge unit in a minced state; A superabsorbent hydrogel complex shredding device comprising a.
[Claim 2]
The method of claim 1, wherein the shredding module comprises: a cutter member installed inside the barrel body to pulverize the hydrogel transferred by the transfer unit; and a perforated plate for discharging the hydrogel pulverized by the cutter member in a minced state; A superabsorbent hydrogel complex shredding device comprising a.
[Claim 3]
According to claim 2, wherein the transfer unit, A screw member rotatably installed inside the transfer space to move the hydrogel; and a driving motor providing a rotational driving force to the screw member. A superabsorbent hydrogel complex shredding device comprising a.
[Claim 4]
[Claim 4] The superabsorbent hydrogel complex mincing device according to claim 3, wherein the plurality of mincing modules are installed to be spaced apart from each other in the direction of the discharge part from the screw member.
[Claim 5]
[Claim 5] The super absorbency according to claim 4, wherein a plurality of small holes for discharging the hydrogel in a minced state are formed in the plurality of perforated plates, and the fine cut holes are respectively formed in the plurality of perforated plates with different diameters. Hydrogel complex mincing device.
[Claim 6]
[Claim 6] The apparatus of claim 5, wherein the fine cut hole is formed to have a minimum diameter at the location of the discharge part among the plurality of perforated plates.
[Claim 7]
[Claim 4] The apparatus of claim 3, wherein the screw threads of the screw member have the same pitch.