FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; Rule 13)
EMBEDDED IMAGE FILM-FOIL AND A PROCESS FOR PREPARING THE SAME
BILCARE LIMITED
an Indian Company
of 601, ICC Trade Tower, Pune- 411016,
Maharashtra, India.
Inventors
1) Prafial Ramachandra Naik
2) Mukherjee Somenath
3) Umarani Mahendra
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

This application is a patent of addition to Indian Patent Application No.l318/MUM/2008 filed on June 24, 2008, the entire contents of which, is specifically incorporated herein by reference.
FIELD OF THE DISCLOSURE
The present disclosure relates to a multi-layer packaging film and a process for preparing the same.
BACKGROUND
Packaging material in the form of polymeric films used for protecting products such as healthcare products and variety of other products including consumable products and non-edible products. The selection of polymeric films for packaging is based on its inertness, durability, cost, strength and resistance to light. Such standardized polymeric film for packaging is even though produced and when the product is packaged in such polymeric films, there are threats of counterfeiting. Counterfeiting is a severe problem for all industries including the pharmaceutical industry. Studies suggest that consumers would prefer to buy products that are in tamper evident authenticated packaging so as to reduce the chance of buying imitation products.
Every leading brand is prone to be attacked by in scrupulous individuals. Counterfeiters not only copy the leading brand but can also permanently damage its reputation. It is the responsibility of the manufacturer or brand owner to ensure that a genuine unadulterated product reaches the consumer.
Primary packaging is most convenient tool to combat with counterfeiting problem. There are certain overt and covert features by combination of which in primary packaging these industries can get advantage of brand identity along with anti-counterfeit solution for the packed products. Creation of an embedded image on film is very critical and it requires special type of coating and all the substrate should withstand the heat and mechanical load at the time of packaging of the products.
The Indian patent application 113l/DEL/2006 discloses a process of producing a colored hologram using a lacquer which comprises UV or electron beam hardening acrylic resin. The colored hologram is made on plastic or paper substrates particularly on flexible film via flexographic printing machine. Said resin is applied on the plastic or paper substrate and then the preformed holographic image is transferred from the master to the flexible plastic or paper substrate followed by radiation curing of the resin on the selected holographic image areas.

Thus, there is felt need for providing an improved packaging film which acts as protective authentication, help against counterfeiting and a process for producing such packaging film.
OBJECTS
Some of the objects of the present disclosure are as discussed herein below.
It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
It is another object of the present disclosure to provide a multi-layer packaging film for pharmaceutical products, food products and non-edible products.
It is another object of the present disclosure to provide a multi-layer packaging film comprising a polymer layer with a non-uniform embedded graphic image.
It is another object of the present disclosure to provide a multi-layer packaging film as a solution for protecting brand identity of the product.
It is another object of the present disclosure to provide a multi-layer packaging film which is cost-effective.
It is another object of the present disclosure to provide a multi-layer packaging film which has effective barrier properties.
It is still another object of the present disclosure to provide a multi-layer packaging film which provides a protective authentication to the packaged product.
It is yet another object of the present disclosure to provide a simple process for producing a multi-layer packaging film.
Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying drawings which are not intended to limit the scope of the present disclosure.
SUMMARY
In accordance with the present disclosure there is provided a multi-layer packaging film comprising: i) at least two polymeric layers having a thickness ranging between 5

microns and 100 microns; ii) at least one metal layer having a thickness ranging between 7 microns and 100 microns; and iii) at least one adhesive layer; wherein, said metal layer is sandwiched between said two polymeric layers.
Typically, the metal layer comprises at least one metal selected from the group consisting of aluminum, gold, silver, copper and platinum.
Typically, the metal layer is in the form of a metal foil.
Typically, at least one polymeric layer is optionally metallized.
Typically, at least one polymeric layer comprising a non-uniform embedded graphic image.
Typically, the thickness of the metallized layer is ranging between 0.001 micron and 1 micron,
Typically, the metallized layer comprises at least one metal selected from the group consisting of aluminum, gold, silver, copper and platinum.
Typically, said two polymeric layers are selected from the group consisting of polypropylenes, polyethylenes, polyesters, copolymers of polyesters, polystyrene, copolymers of polystyrene, EVOH (copolymer of ethylene and vinyl alcohol), polyamides, copolymers of nylon, copolymers of ethylene methacrylic acid, PVC and a combination thereof.
Typically, the adhesive is at least one selected from the group consisting of polyurethanes, waterborne acrylic dispersion coatings, UV-curable formulations, unsaturated polyesters, epoxy based compounds, polyesters, polyacrylics, polymethyl acrylates, isocynates and a combination thereof.
Typically, the non-uniform embedded graphic image is created on at least one polymeric layer.
Typically, the non-uniform embedded graphic image is protected from physical damage and/or decorated for better aesthetics by means of an ink selected from the group consisting of polyesters, polyacrylics, NC based compounds (nitro-cellulose compounds), polyurethanes, thermochromic inks, UV inks, and a combination thereof.

Typically, the multi-layer packaging film is suitable for packaging product at least one selected from the group consisting of pharmaceuticals, solid foods, drinks and non-consumable products.
In accordance with the present disclosure there is provided a process for producing a multi-layer packaging film, said process comprising the following steps: i) creating an non-uniform embedded graphic image on one side of a polymeric layer; ii) affixing a metal layer with the non-imaged side of the polymeric layer; and iii) attaching the other side of the metal layer with at least one polymeric layer.
Typically, the affixing is carried out by means of an adhesive selected from the group consisting of polyurethanes, waterborne acrylic dispersion coatings, UV-curable formulations, unsaturated polyesters, epoxy based compounds, polyesters, polyacrylics, polymethyl acrylates, isocynates and a combination thereof.
Typically, the process further comprises a step of metallizing at least one polymeric layer,
DETAILED DESCRIPTION
Our co-pending Patent Application No. 1318/MUM/2008 discloses a multilayer formable packaging film comprising; a substrate devoid of plasticizer; a coat of an ester acrylic based primer, on a first surface of said substrate; a metallized layer deposited on said coat and embossed with a pre-determined pattern; and a base provided on the second surface of said substrate. The multilayer formable packaging film disclosed in Patent Application No. 1318/MUM/2011, is thermo formable and cold formable. The film is useful for preparing blister packaging units. The substrate used in the film of 1318/MUM/2008 is polyvinyl chloride (PVC). The inventors of the present disclosure focused on the preparation of a multi-layer packaging film which can be used for strip packaging units.
Accordingly, the present disclosure provides a multi-layer packaging film and a process for the preparation of said multi-layer packaging film.
In one aspect of the present disclosure, there is provided a multi-layer packaging film comprising at least two polymeric layers, at least one metal layer and an adhesive layer. The metal layer comprises at least one metal selected from the group consisting of aluminum, gold, silver, copper, platinum and the like. Preferably, the metal is aluminum. The thickness of the metal layer is ranging between 7 microns and 100 microns.
In one embodiment of the present disclosure, there is provided a metal layer in the form of a metal foil.

In one embodiment of the present disclosure, there are provided two polymeric layers in the multi-layer packaging film. A first polymeric layer contains a non-uniform embedded graphic image on one side of the first polymeric layer.
The first polymeric layer and a second polymeric layer of said multi-layer packaging film are same or different and is at least one selected from the consisting of polypropylene. polyethylene, polyesters, copolymers of polyesters, polystyrene, copolymers of polystyrene, EVOH (copolymer of ethylene and vinyl alcohol), polyamide, copolymers of nylon, PVC, copolymer of ethylene methacrylic acid and a combination thereof. The thicknesses of the first polymeric layer and the second polymeric layer are ranging between 5 microns and 100 microns.
Typically, the metal layer is sandwiched between the first polymeric layer and the second polymeric layer.
In another embodiment of the present disclosure, there is provided an adhesive layer between the metal layer and the polymeric layer. The adhesive includes but is not limited to a polyurethane, a waterborne acrylic dispersion coating, a UV-curable formulation, an unsaturated polyester, an epoxy based compound, a polyester, a polyacrylic, a polymethyl acrylate, an isocynate and a combination thereof. The thickness of the adhesive layer is ranging between 2 grams per square meter (gsm) and 10 grams per square meter (gsm).
In another embodiment of the present disclosure, there is provided a metallization of at least one polymeric layer. The metallization of the polymeric layer is carried out by using at least one metal selected from the group consisting of aluminum, gold, silver, copper, platinum and the like. The thickness of the metallized layer is ranging between 0.001 micron and 1 micron.
Typically, the non-uniform embedded graphic image is protected from physical damage and/or decorated for better aesthetics by means of an ink. The ink includes but is non-limited to regular ink obtained from polymers like polyesters, polyacrylics, NC based compounds (nitro-cellulose compounds), polyurethanes and a combination thereof. Other ink from thermochromic ink, UV inks, inks with solvent or water base, and the like.
Typically, the non-uniform embedded graphic image on the first polymeric layer is embedded by differential grating.
In another aspect of the present disclosure, there is provided a process for producing a multi-layer packaging film. The process involves the first step of creating the non-uniform embedded graphic image on one side of the first polymeric layer. The non-

imaged side of the first polymeric layer is then affixed to a metal layer by means of the adhesive. In the next step, the other side of the metal layer is attached to the second polymeric layer by means of the adhesive.
In one embodiment of the present disclosure, the process further comprises a step of metallizing the first polymeric layer.
In another embodiment of the present disclosure, the multi-layer packaging film is provided with the first polymeric layer comprising various micro-texts, nano-texts, optical designs, geometrical pattern and any combination thereof.
The multi-layer packaging film of the present disclosure is suitable for packaging products which include but are not limited to pharmaceuticals, solid foods, drinks, non-consumable products and products which need to be protected from damage and/or decomposition.
In another aspect of the present disclosure, there is provided a strip packaging unit prepared by using the multi-layer packaging film of the present disclosure The strip packaging unit is therefore a solution for protecting brand identity of the desired product. Moreover, the multi-layer packaging film of the present disclosure is holding effective barrier properties and protects the product from damage and/or decomposition.
In another embodiment of the present disclosure for creating the non-uniform embedded graphic image, there is provided a master origination which is a piece of nickel shim. Said master origination is produced by master shooting system (2D/3D or dot-matrix) using a laser, an advanced optic, and a photosensitive glass.
The created image is recorded by master shooting system onto the photosensitive glass and the glass is then coated with a silver layer for electronic forming. After electronic forming, the image and other information such as E-beam or mole hidden text which are in 2D/3D or dot-matrix effect are recorded on a piece of nickel shim. These steps finally provide the master origination.
In the next step, the nickel shim is duplicated from the origination by electronic forming. The nickel shim is then mounted on the hollow cylinder which is filled with an oil. The oil is heated at a temperature ranging between 90 C to 150 °C for embossing the graphic and/or design on a substrate using the nickel shim. The substrate of the present disclosure is the first polymeric layer.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description.

Descriptions of well-known components and processing techniques are omitted so as to not necessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
Example 1:
A multi-layer packaging film was produced by using dry lamination process. In the said process, 7 microns aluminum foil in 600 mm width unwinded through unwinder of the lamination machine and 10 microns PET roll on which non-uniform embossed image was created, said PET roll was loaded on the secondary unwinder of the lamination machine in such way that non embossed side of the film would laminate with the adhesive side of the aluminum foil. Two component polyurethane based adhesive from Henkel with viscosity ranging between 18 and 25 second viscosity was applied on glossy surface of the aluminum foil using the gravure roller and about 2.5 GSM coating of this adhesive was obtained.The coating thickness of the adhesive was adjusted by the roller gap and doctor blade angle (pressure was around 6 bar). The coated aluminum foil was allowed to travel through the heating chamber. The oven temperature was maintained at a temperature of 60 °C and at the speed of 50 meter/minutes tor drying the adhesive on the foil. The dried Aluminum foil was received from the oven and was then laminated with corona treated 10 microns PET (image embedded roll) through nipping roller. Nipping taken place at a pressure of 6 bar and laminated the material into a single web. The obtained aluminum/PET roll was rewound on the winder.
The above laminate was cured for 24 hours at a temperature ranging between 25 °C to 30 °C and about 65 % relative humidity (RH).
The cured roll of aluminum/PET was loaded on the primary reiwinder of the lamination machine. 20 microns of polyethylene film was loaded on the secondary re winder of the lamination machine. Two component polyurethane based adhesive from Henkel with viscosity of 18 to 25 second viscosity was applied on dull side of the aluminum side of the aluminum/PET laminate using the gravure roller around 2.5 GSM coating of this adhesive. The coated laminate was allowed to travel through the heating chamber. The oven temperature was maintained at a temperature of 60°C and the speed of 50 meter/minutes for drying the adhesive on the laminate. The dried laminate received from ' oven was laminated with corona treated 20 microns polyethylene on the nipping roller which was consisted of a steel and a rubber roller and with enough pressure (pressure is around 6 bar) to laminate the material into a single web. The PE/aluminum/PET roll was rewound on the winder.
The above laminate i.e. PE/aluminum/PET was cured for 24 hours at a temperature ranging between 25 °C to 30 °C and about 65 % relative humidity (RH).

Example 2:
10 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 42
Total GSM: 56
Sealing strength at a temperature of 150°C: 0.47Kg/cm
Scotch Test: Pass
Co-efficient of friction (COF) PE to Metal: 0.30/0.26
Co-efficient of friction (COF) PE to PE: 0.28/0.24
Example 3:
12 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 25 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 49
Total GSM: 64
Sealing strength at a temperature of 150°C: 0.43Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.34/0.26
COF PE to PE: 0.32/0.22
Example 4:
18 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 55
Total GSM: 81
Sealing strength at a temperature of 150°C: 0.44Kg/cm

Scotch Test: Pass COF PE to Metal: 0.31/0.28 COF PE to PE: 0.29/0.26
Example 5:
12 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 79
Total GSM: 100
Sealing strength at a temperature of 150°C: 0.53Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.34/0.27
COFPE to PE: 0.29/0.28
Example 6:
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 20 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 68
Total GSM: 109
Sealing strength at a temperature of 150°C: 0.42Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.35/0.26
COF PE to PE: 0.32/0.25
Example 7:
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:

Total Thickness in micron: 90
Total GSM: 115
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.33/0.27
COF PE to PE: 0.36/0.28
Example 8:
12 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 46
Total GSM: 64
Sealing strength at a temperature of 150°C: 0.41 Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.34/0.25
COF PE to PE: 0.38/0.27
Example 9:
18 microns PET Polyester film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 25 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 57
Total GSM: 77
Sealing strength at a temperature of 150°C: 0.51 Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.36/0.25
COF PE to PE: 0.28/0.24
Example 10:

18 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 40 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 113
Total GSM: 184
Sealing strength at a temperature of 150°C 0.49Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.35/0.27
COF PE to PE: 0.34/0.27
Example 11:
12microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 79
Total GSM: 100
Sealing strength at a temperature of 150°C: 0.53Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.34/0.27
COF PE to PE: 0.29/0.28
Example 12:
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 55
Total GSM: 74
Sealing strength at a temperature of 150°C: 0.42Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.30/0.29

COF PE to PE: 0.33/0.26
Example 13:
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 20microns aluminum foil and other side of aluminum foil was laminated with 25 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 73
Total GSM: 114
Sealing strength at a temperature of 150°C: 0.46Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.32/0.38
COF PE to PE: 0.30/0.26
Example 14;
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 25 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 73
Total GSM: 123
Sealing strength at a temperature of 150°C: 0.39Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.30/0.26
COF PE to PE: 0.28/0.24
Example 15:
23 microns PET polyester film with non-uniform embosseci image was created and non embossed side was laminated with 25 microns aluminum foil and other side of aluminum foil was laminated with 25 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 78

Total GSM: 128
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.31/0.27
COF PE to PE: 0.33/0.27
Example 16:
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 30 microns aluminum foil and other side of aluminum foil was laminated with 27 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 85
Total GSM: 143
Sealing strength at a temperature of 150°C: 0.41 Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.33/0.27
COF PE to PE: 0.29/0.26
Example 17:
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 30 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 88
Total GSM: 146
Sealing strength at a temperature of 150°C: 0.45Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.370/0.27
COF PE to PE: 0.33/0.28
Example 18:
23 microns PET Polyester film with non-uniform embossed image was created and non embossed side was laminated with 40 microns aluminum foil and other side of aluminum foil was laminated with 40 microns polyethylene.

The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 108
Total GSM: 182
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.31/0.27
COF PE to PE: 0.32/0.25
Example 19:
23 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 40 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 118
Total GSM: 191
Sealing strength at a temperature of 150°C: 0.41 Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.32/0.26
COF PE to PE: 0.28/0.24
Example 20:
18 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 50
Total GSM: 67
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COFPE to Metal: 0.32/0.25
COF PE to PE: 0.29/0.27
Example 21:

20 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in microti-. 64
Total GSM: 76
Sealing strength at a temperature of 150°C: 0.42Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.33/0.29
COF PE to PE: 0.35/0.27
Example 22:
20 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 67
Total GSM: 84
Sealing strength at a temperature of 150°C: 0.41Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.31/0.27
COF PE to PE: 0.31/0,29
Example 23:
25 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 69
Total GSM: 80
Sealing strength at a temperature of 150°C: 0.48Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.30/0.28

COF PE to PE: 0.32/0.27 Example 24:
25 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 72
Total GSM: 88
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.31/0.29
COF PE to PE: 0.35/0.26
Example 25:
25 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 30 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 110
Total GSM: 155
Sealing strength at a temperature of 150°C: 0.43Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.33/0.29
COF PE to PE: 0.33/0.26
Example 26:
20 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 30 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 85

Total GSM: 132
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test; Pass
COF PE to Metal: 0.33/0.29
COF PE to PE: 0.36/0.278
Example 27:
20 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 87
Total GSM: 102
Sealing strength at a temperature of 150°C: 0.45Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.31/0.26
COF PE to PE: 0.34/0.27
Example 28:
40 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 84
Total GSM: 94
Sealing strength at a temperature of 150 C: 0.41Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.31/0.29
COF PE to PE: 0.32/0.27
Example 29:
50 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.

The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 114
Total GSM: 121
Sealing strength at a temperature of 150°C: 0.40Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.32/0.25
COF PE to PE: 0.31/0.24
Example 30:
20 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total GSM: 94
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.32/0.29
COF PE to PE: 0.32/0.28
Example 31:
20 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polypropylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 57
Total GSM: 74
Sealing strength at a temperature of 150°C: 0.47Kg/cm
Scotch Test: Pass
COF PP to Metal: 0.37/0.26
COF PE to PP: 0.33/0.28
Example 32:

50 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polypropylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 114
Total GSM: 121
Sealing strength at a temperature of 150°C: 0.45Kg/cm
Scotch Test: Pass
COF PP to Metal: 0.33/0.27
COF PE to PP: 0.32/0.28
Example 33:
50 microns polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 50 microns aluminum foil and other side of aluminum foil was laminated with 50 microns polypropylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 155
Total GSM: 233
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF PP to Metal: 0.31/0.26
COF PE to PP: 0.33/0.29
Example 34:
20 microns polyethylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 54
Total GSM: 66
Sealing strength at a temperature of 150°C: 0.42Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.37/0.26

COF PE to PE: 0.35/0.27 Example 35:
40 microns polyethylene film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 40 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 94
Total GSM: 103
Sealing strength at a temperature of 150°C: 0.47Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.38/0.27
COF PE to PE: 0.38/0.26
Example 36;
20 microns EVOH film with non-uniform embossed image was created and non embossed side was laminated with 30 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 75
Total GSM: 128
Sealing strength at a temperature of 150°C: 0.47Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.35/0.27
COF PE to PE: 0.36/0.25
Example 37:
20 microns EVOH film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 25 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 59

Total GSM: 76
Sealing strength at a temperature of 150°C: 0.47Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.36/0.28
COF PE to PE: 0.35/0.28
Example 38:
10 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 20 microns Surlyn.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 42
Total GSM: 57
Sealing strength at a temperature of 150°C: 0.53Kg/cm
Scotch Test: Pass
COF Surlyn to Metal: 0.38/0.27
COF Surlyn to Surlyn: 0.37/0.25
Example 39:
12 microns PET Polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 25 microns Surlyn.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 49
Total GSM: 64
Sealing strength at a temperature of 150°C: 0.48Kg/cm
Scotch Test: Pass
COF Surlyn to Metal: 0.37/0.27
COF Surlyn to Surlyn: 0.35/0.24
Example 40:
18 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 9 microns aluminum foil and other side of aluminum foil was laminated with 25 microns Surlyn.

The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 57
Total GSM: 78
Sealing strength at a temperature of 150°C: 0.54Kg/cm
Scotch Test: Pass
COF Surlyn to Metal: 0.38/0.27
COF Surlyn to Surlyn: 0.37/0.25
Example 41:
18 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 30 microns aluminum foil and other side of aluminum foil was laminated with 30 microns Surlyn.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 83
Total GSM: 139
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF Surlyn to Metal: 0.38/0.29
COF Surlyn to Surlyn: 0.36/0.27
Example 42:
12 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 50 microns Surlyn.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 79
Total GSM: 101
Sealing strength at a temperature of 150°C: 0.50Kg/cm
Scotch Test: Pass
COF Surlyn to Metal: 0.37/0.26
COF Surlyn to Surlyn: 0.34/0.28
Example 43:

40 microns PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 12 microns aluminum foil and other side of aluminum foil was laminated with 50 microns Surlyn.
The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 107
Total GSM: 140
Sealing strength at a temperature of 150°C: 0.48Kg/cm
Scotch Test: Pass
COF Surlyn to Metal: 0.36/0.27
COF Surlyn to Surlyn: 0.36/0.27
Example 44:
12 microns PET Polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 50 microns Surlyn. The resulting laminated material, after drying holds the following properties:
Total Thickness in micron: 74
Total GSM: 87
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF Surlyn to Metal: 0.36/0.27
COF Surlyn to Surlyn: 0.38/0.25
Example 45:
100 microns metallized polyethylene film with non-uniform embossed image was created and non embossed side was laminated with 20 microns aluminum foil and other side of aluminum foil was laminated with 100 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness: 92
Total GSM: 243
Sealing strength at a temperature of 150°C: 0.46Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.38/0.27

COF PE to PE: 0.36/0.23
Example 46:
10 microns metallized PET polyester film with non-uniform embossed image was created and non embossed side was laminated with 7 microns aluminum foil and other side of aluminum foil was laminated with 20 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness: 42
Total GSM: 56
Sealing strength at a temperature of 150°C: 0.49Kg/cm
Scotch Test: Pass
COF PE to Metal: 0.36/0.25
COF PE to PE: 0.32/0.25
Example 47:
20 microns metallized polypropylene film with non-uniform embossed image was created and non embossed side was laminated with 30 microns aluminum foil and other side of aluminum foil was laminated with 30 microns polyethylene.
The resulting laminated material, after drying holds the following properties:
Total Thickness: 85
Total GSM: 132
Sealing strength at a temperature of 150 C: 0.44Kg/cm
Scotch Test; Pass
COF PE to Metal: 0.37/0.27
COF PE to PE: 0.35/0.27

TECHNICAL ADVANTAGES
The present disclosure relates to a multi-layer packaging film and a process for producing the multi-layer packaging film have several technical advantages including but not limited to the realization of:
1. the multi-layer packaging film provides a strong solution for protecting brand identity of the branded product:
2. the multi-layer packaging film provides effective barrier property:
3. the multi-layer packaging film was cost-effective: and
4. the process for producing the multi-layer packaging film was simple and cost-effective.
While certain embodiments of the disclosures have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the disclosure. Variations or modifications to the design and construction of this disclosure, within the scope of the disclosure, may occur to those skilled in the art upon reviewing the disclosure herein. Such variations or modifications are well within the spirit of this disclosure. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the disclosure.
The numerical values given for various physical parameters, dimensions and quantities are only approximate values and it was envisaged that the values higher than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure and the claims unless there was a statement in the specification to the contrary.

We claim
1. A multi-layer packaging film comprising:
i) at least two polymeric layers having a thickness ranging between 5
microns and 100 microns; ii) at least one metal layer having a thickness ranging between 7 microns and
100 microns; and iii) at least one adhesive layer; wherein, said metal layer is sandwiched between said two polymeric layers.
2. The multi-layer packaging film as claimed in claim 1, wherein the metal layer comprises at least one metal selected from the group consisting of aluminum, gold, silver, copper and platinum.
3. The multi-layer packaging film as claimed in claim 1, wherein the metal layer is in the form of a metal foil.
4. The multi-layer packaging film as claimed in claim 1, wherein at least one polymeric layer is optionally metallized.
5. The multi-layer packaging film as claimed in claims 1 and 4, wherein at least one polymeric layer comprising a non-uniform embedded graphic image.
6. The multi-layer packaging film as claimed in claim 4, wherein the thickness of the metallized layer is ranging between 0.001 micron and 1 micron.
7. The multi-layer packaging film as claimed in claim 4; wherein the metallized layer comprises at least one metal selected from the group Consisting of aluminum, gold, silver, copper and platinum.
8. The multi-layer packaging film as claimed in claim 1, wherein said two polymeric layers are selected from the group consisting of polypropylenes, polyethylenes,

polyesters, copolymers of polyesters, polystyrene, copolymers of polystyrene. EVOH (copolymer of ethylene and vinyl alcohol), polyamides, copolymers of nylon, copolymers of ethylene methacrylic acid, PVC and a combination thereof.
9. The multi-layer packaging film as claimed in claim 1, wherein the adhesive is at least one selected from the group consisting of polyurethanes, waterborne acrylic dispersion coatings, UV-curable formulations, unsaturated polyesters, epoxy based compounds, polyesters, polyacrylics, polymethyl acrylates, isocynates and a combination thereof.
10. The multi-layer packaging film as claimed in claim 1, wherein the non-uniform embedded graphic image is created on at least one polymeric layer.
11. The multi-layer packaging film as claimed in claim 10, wherein the non-uniform embedded graphic image is protected from physical damage and/or decorated for better aesthetics by means of an ink selected from the group consisting of polyesters, polyacrylics, NC based compounds (nitro-cellulose compounds), polyurethanes, thermochromic inks, UV inks. and a combination thereof.
12. The multi-layer packaging films as claimed in claim 1, wherein the multi-layer packaging film is suitable for packaging product at least one selected from the group consisting of pharmaceuticals, solid foods, drinks and non-consumable products.
13. A process for producing a multi-layer packaging film, said process comprising the following steps:
i) creating an non-uniform embedded graphic image on one side of a polymeric
layer; ii) affixing a metal layer with the non-imaged side of the polymeric layer; and iii) attaching the other side of the metal layer with at least one polymeric layer.

14. The process as claimed in claim 13, wherein the affixing is carried out by means of an adhesive selected from the group consisting of polyurethanes, waterborne acrylic dispersion coatings, UV-curable formulations, unsaturated polyesters, epoxy based compounds, polyesters, polyacrylics, polymethyl acrylates, isocynates and a combination thereof.
15. The process as claimed in claim 13, wherein the process further comprises a step of metallizing at least one polymeric layer.