Anti-counterfeiting laser transfer paper for food packaging bag with ultrahigh moisture and oxygen resistance

Abstract

The utility model discloses anti-counterfeiting laser transfer paper for an ultrahigh moisture-resistant oxygen-resistant food packaging bag, which relates to the field of packaging materials and comprises a heat-seal coating, a transfer coating, a first vacuum aluminum-plated layer, a first composite adhesive layer and a food-grade base paper layer. The anti-fake laser transfer paper for the food packaging bag with the ultrahigh moisture and oxygen resistance further comprises a high-barrier coating, a second composite adhesive layer, a second vacuum aluminum plating layer and an anti-fake laser information transfer coating. The anti-counterfeiting laser information transfer coating, the second vacuum aluminized layer, the second composite adhesive layer, the food-grade base paper layer, the first composite adhesive layer, the first vacuum aluminized layer, the transfer coating, the high-barrier coating and the heat-seal coating are sequentially arranged from top to bottom. The anti-counterfeiting laser transfer paper for the ultrahigh moisture and oxygen barrier food packaging bag is good in moisture and oxygen barrier effect, capable of reducing contact of food with moisture and oxygen in a high-humidity environment, environment-friendly, recyclable, low in cost, anti-counterfeiting and attractive.

Description

Technical Field

[0001] The utility model relates to the field of packaging materials, in particular to an anti-counterfeiting laser transfer paper for a food packaging bag with ultra-high moisture and oxygen resistance. Background Art

[0002] At present, there is a lack of anti-counterfeiting laser transfer paper for food packaging bags on the market that can block moisture and oxygen in high-humidity transportation environments to better preserve food. Utility Model Content

[0003] In view of the above-mentioned shortcomings that currently exist, the utility model provides an anti-counterfeiting laser transfer paper for food packaging bags with ultra-high moisture and oxygen barrier effects. It has good moisture and oxygen barrier effects, can reduce the contact of food with moisture and oxygen in a high humidity environment, is environmentally friendly and recyclable, has low cost, and has an anti-counterfeiting and beautiful appearance.

[0004] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0005] Disclosed is an anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags, comprising a heat-sealing coating, a transfer coating, a first vacuum aluminum-plated layer, a first composite adhesive layer, and a food-grade base paper layer. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags also comprises a high-barrier coating, a second composite adhesive layer, a second vacuum aluminum-plated layer, and an anti-counterfeiting laser information transfer coating. The anti-counterfeiting laser information transfer coating, the second vacuum aluminum-plated layer, the second composite adhesive layer, the food-grade base paper layer, the first composite adhesive layer, the first vacuum aluminum-plated layer, the transfer coating, the high-barrier coating, and the heat-sealing coating are arranged in sequence from top to bottom.

[0006] According to one aspect of the utility model, the anti-counterfeiting laser information transfer coating is a water-based acrylic copolymer.

[0007] According to one aspect of the utility model, the anti-counterfeiting laser information transfer coating has a solid content of 10-25%, a softening point of 120-130°C, a machine viscosity of 18-25 seconds, and a dry coating amount of 0.9-1.1 g / m 2 .

[0008] According to one aspect of the present invention, the second composite adhesive layer is a water-based dry composite adhesive with a coating amount of 4 to 7 g / m 2 .

[0009] According to one aspect of the utility model, the thickness of the first vacuum aluminum coating layer and the second vacuum aluminum coating layer are both 480 to 560 angstroms.

[0010] According to one aspect of the utility model, the high barrier coating is a water-based acrylic polymer.

[0011] According to one aspect of the utility model, the heat-seal coating is a water-based acrylic copolymer with a fineness of 0.1 micron, a solid content of 40±2%, a viscosity on the machine of 14 to 20 seconds, and a coating amount of 5 to 15 g / m 2 .

[0012] According to one aspect of the utility model, the transfer coating is a water-based acrylic copolymer with a solid content of 10-25%, a softening point of 150-160°C, a machine viscosity of 18-25 seconds, and a dry coating amount of 1.1-1.4 g / m 2 .

[0013] According to one aspect of the utility model, the first composite adhesive layer is a water-based transfer composite adhesive with a fineness of 0.14 microns, a solid content of 50±2%, a machine viscosity of 16 to 22 seconds, and a coating amount of 6 to 9 g / m 2 .

[0014] According to one aspect of the utility model, the food-grade base paper layer is glassine paper with a grammage of 32 to 78 g / m 2 .

[0015] Advantages of the implementation of the utility model: An anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags, which is provided with an anti-counterfeiting laser information transfer coating, a second vacuum aluminum coating layer, a second composite adhesive layer, a food-grade base paper layer, a first composite adhesive layer, a first vacuum aluminum coating layer, a transfer coating, a high barrier coating, and a heat-sealing coating in sequence from top to bottom. By providing an anti-counterfeiting laser information transfer coating, two layers of aluminum coating, a high barrier coating, a heat-sealing coating, etc., the moisture and oxygen barrier properties of this product are stronger, and can reduce the contact between food and moisture and oxygen in a high humidity environment. By adopting a food-grade base paper layer and a water-based composite adhesive for the composite adhesive layer, etc., this product complies with the production concept of environmental protection and pollution-free, and can be degraded and recycled. The overall structure of this product is simple and compact, the cost is low, and it has multiple functions such as beauty, anti-counterfeiting and ultra-high barrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] The names corresponding to the serial numbers in the figure are as follows:

[0019] 1. Heat-seal coating; 2. High barrier coating; 3. Transfer coating; 4. First vacuum aluminum coating layer; 5. First composite adhesive layer; 6. Food-grade base paper layer; 7. Second composite adhesive layer; 8. Second vacuum aluminum coating layer; 9. Anti-counterfeiting laser information transfer coating. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] like Figure 1 As shown, an anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags is provided with an anti-counterfeiting laser information transfer coating 9, a second vacuum aluminum-plated layer 8, a second composite adhesive layer 7, a food-grade base paper layer 6, a first composite adhesive layer 5, a first vacuum aluminum-plated layer 4, a transfer coating 3, a high barrier coating 2, and a heat-sealing coating 1 from top to bottom.

[0023] In this embodiment, the anti-counterfeiting laser information transfer coating 9 is a water-based acrylic copolymer, that is, a copolymer of methyl methacrylate, butyl methacrylate and methacrylic acid; the solid content of the anti-counterfeiting laser information transfer coating 9 is 10-25%, the softening point is 120-130°C, the viscosity on the machine is 18-25 seconds, and the dry coating amount is 0.9-1.1 g / m 2 The coating can adhere well to aluminum, release well from BOPET film, and has clear and bright molded gratings. It can be printed, and the use of its resin components and additives complies with the provisions of GB 4806.10, GB 9685 and related announcements.

[0024] In this embodiment, the second composite adhesive layer 7 is a water-based dry composite adhesive, the main component of which is a copolymer of butyl acrylate and methacrylic acid, and the coating amount is 4-7 g / m 2 The use of its resin components and additives complies with the provisions of GB 4806.6, GB 9685 and related announcements.

[0025] In this embodiment, the first vacuum aluminum coating layer 4 and the second vacuum aluminum coating layer 8 have the same structure, and the thickness of both is 480 to 560 angstroms. Both are formed by vacuum aluminum coating equipment by heating aluminum wire with a purity of 99.9% at high temperature to vaporize it, then cooling it and depositing it on the surface of the film.

[0026] In this embodiment, the high barrier coating 2 is a water-based acrylic polymer, which has ultra-high moisture and oxygen barrier properties when coated on the aluminum layer. The use of its resin components and additives complies with the provisions of GB 4806.6, GB 9685 and related announcements; the fineness of the high barrier coating 2 is 0.1 micron, the solid content is 40±2%, the pH value is 6.0-8.0, (the viscosity is measured under the conditions of coating No. 4 cup and the temperature is 25°C) the viscosity on the machine is 14-20 seconds, and the coating amount is 5-10g / m 2 .

[0027] In this embodiment, the heat-seal coating 1 is a water-based acrylic copolymer with oil-proof and water-blocking functions and heat-sealability, which can be used to contact various foods. The use of its resin components and additives complies with the provisions of GB 4806.6, GB 9685 and related announcements; the fineness of the heat-seal coating 1 is 0.1 micron, the solid content is 40±2%, the pH value is 6.0-8.0, (the viscosity is measured under the condition of coating No. 4 cup and the temperature is 25°C) the viscosity on the machine is 14-20 seconds, and the coating amount is 5-15 g / m 2 .

[0028] In this embodiment, the transfer coating 3 is a water-based acrylic copolymer (a copolymer of methyl methacrylate, butyl methacrylate and methacrylic acid). This coating can adhere well to aluminum and release well from BOPET film. The use of its resin components and additives complies with the provisions of GB 4806.10, GB 9685 and related announcements; the transfer coating 3 has a solid content of 10-25%, a softening point of 150-160° C., a machine viscosity of 18-25 seconds, and a dry coating amount of 1.1-1.4 g / m 2 .

[0029] In this embodiment, the first composite adhesive layer 5 is a water-based transfer composite adhesive, the main component of which is a copolymer of butyl acrylate and methacrylic acid. The use of its resin components and additives complies with the provisions of GB 4806.6, GB 9685 and related announcements, and it has acid and alcohol resistance; the fineness of the first composite adhesive layer 5 is 0.14 microns, the solid content is 50±2%, the pH value is 6.0-8.0, (the viscosity is measured under the conditions of coating No. 4 cup and the temperature is 25°C) the viscosity on the machine is 16-22 seconds, and the coating amount is 6-9g / m 2 .

[0030] In this embodiment, the weight of the food-grade base paper layer 6 is 32-78 g / m 2 , food grade base paper layer 6 uses 40g / m 2 UPM glassine paper.

[0031] Embodiment 2

[0032] like Figure 1As shown, an anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags is provided with an anti-counterfeiting laser information transfer coating 9, a second vacuum aluminum-plated layer 8, a second composite adhesive layer 7, a food-grade base paper layer 6, a first composite adhesive layer 5, a first vacuum aluminum-plated layer 4, a transfer coating 3, a high barrier coating 2, and a heat-sealing coating 1 from top to bottom.

[0033] In this embodiment, the anti-counterfeiting laser information transfer coating 9 is a water-based acrylic copolymer, that is, a copolymer of methyl methacrylate, butyl methacrylate and methacrylic acid; the solid content of the anti-counterfeiting laser information transfer coating 9 is 10-25%, the softening point is 120-130°C, the viscosity on the machine is 18-25 seconds, and the dry coating amount is 0.9-1.1 g / m 2 The coating can adhere well to aluminum, release well from BOPET film, and has clear and bright molded gratings. It can be printed, and the use of its resin components and additives complies with the provisions of GB 4806.10, GB 9685 and related announcements.

[0034] In this embodiment, the second composite adhesive layer 7 is a water-based dry composite adhesive, the main component of which is a copolymer of butyl acrylate and methacrylic acid, and the coating amount is 4-7 g / m 2 The use of its resin components and additives complies with the provisions of GB 4806.6, GB 9685 and related announcements.

[0035] In this embodiment, the first vacuum aluminum coating layer 4 and the second vacuum aluminum coating layer 8 have the same structure, and the thickness of both is 480 to 560 angstroms. Both are formed by vacuum aluminum coating equipment by heating aluminum wire with a purity of 99.9% at high temperature to vaporize it, then cooling it and depositing it on the surface of the film.

[0036] In this embodiment, the high barrier coating 2 is a water-based acrylic polymer, which is coated on the aluminum layer and has ultra-high moisture and oxygen barrier properties. The use of its resin components and additives complies with the provisions of GB4806.6, GB 9685 and related announcements; the fineness of the high barrier coating 2 is 0.1 micron, the solid content is 40±2%, the pH value is 6.0-8.0, (the viscosity is measured under the conditions of coating No. 4 cup and the temperature is 25°C) the viscosity on the machine is 14-20 seconds, and the coating amount is 5-10g / m 2 .

[0037] In this embodiment, the heat-seal coating 1 is an aqueous acrylic copolymer with oil-proof function and heat-sealability, which can be used to contact various foods. The use of its resin components and additives complies with the provisions of GB 4806.6, GB 9685 and related announcements; the heat-seal coating 1 has a fineness of 0.1 micron, a solid content of 40±2%, a pH value of 6.0-8.0, (viscosity measured under the condition of coating No. 4 cup at a temperature of 25°C) a viscosity on the machine of 14-20 seconds, and a coating amount of 5-15 g / m2 .

[0038] In this embodiment, the transfer coating 3 is a water-based acrylic copolymer (a copolymer of methyl methacrylate, butyl methacrylate and methacrylic acid). This coating can adhere well to aluminum and release well from BOPET film. The use of its resin components and additives complies with the provisions of GB 4806.10, GB 9685 and related announcements; the transfer coating 3 has a solid content of 10-25%, a softening point of 150-160° C., a machine viscosity of 18-25 seconds, and a dry coating amount of 1.1-1.4 g / m 2 .

[0039] In this embodiment, the first composite adhesive layer 5 is a water-based transfer composite adhesive, the main component of which is a copolymer of butyl acrylate and methacrylic acid. The use of its resin components and additives complies with the provisions of GB 4806.6, GB 9685 and related announcements, and it has acid and alcohol resistance; the fineness of the first composite adhesive layer 5 is 0.14 microns, the solid content is 50±2%, the pH value is 6.0-8.0, (the viscosity is measured under the conditions of coating No. 4 cup and the temperature is 25°C) the viscosity on the machine is 16-22 seconds, and the coating amount is 6-9g / m 2 .

[0040] In this embodiment, the weight of the food-grade base paper layer 6 is 32-78 g / m 2 , food grade base paper layer 6 uses 40g / m 2 UPM glassine paper.

[0041] The production process steps of an anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags are as follows:

[0042] Step 1: Apply water-based environmentally friendly food-grade anti-counterfeiting laser information transfer coating 9 on the surface of a 15u thick biaxially oriented polyester film (BOPET film) at a coating speed of 100-130m / min on a coating machine, and use an oven to dry and solidify to form a coating film. (The anti-counterfeiting laser information transfer coating 9 has a solid content of 20-25%, a softening point of 120-130°C, a machine viscosity of 18-25 seconds, and a dry coating amount of 0.9-1.1g / m 2 . )

[0043] Step 2: Laser holographic embossing is performed on the anti-counterfeiting laser information transfer coating film on a laser embossing machine. The embossing method adopts a hard pressing seamless embossing method. After laser embossing, the anti-counterfeiting laser information transfer coating 9 is recorded on the biaxially stretched PET polyester film transfer coating 3 to form an anti-counterfeiting laser transfer coating film. The embossing temperature of this step is 150-165° C., and the embossing speed is 60-80 m / min.

[0044] Step 3: Use vacuum aluminum plating machine to coat high purity aluminum wire at 10 -2 ~10 -3 Pa vacuum conditions, heated to about 1400 degrees Celsius gasification, and then cooled to adhere to the transfer coating surface of the anti-counterfeiting laser transfer coating film, forming an anti-counterfeiting laser transfer aluminum-plated film with an anti-counterfeiting laser holographic pattern and a vacuum aluminum-plated layer, the thickness of the aluminum-plated layer is 480 to 560 angstroms. (Steps 1 to 3 obtain the anti-counterfeiting laser information transfer coating 9 and the second vacuum aluminum-plated layer 8 attached to the BOPET film.)

[0045] Step 4: Apply a water-based environmentally friendly food-grade transfer coating 3 on the surface of a 12u thick biaxially oriented BOPET polyester film at a coating speed of 100-130m / min on a coating machine, and dry and solidify in an oven to form a transfer coating film with a solid content of 10-25%, a softening point of 150-160°C, a machine viscosity of 18-25 seconds, and a dry coating amount of 1.1-1.4g / m 2 .

[0046] Step 5: Repeat step 3 with the transfer coating film obtained in step 4 to obtain a transfer aluminum-plated film with a vacuum aluminum-plated layer, wherein the thickness of the aluminum-plated layer is 480 to 560 angstroms.

[0047] Step 6: On the wet laminating gantry machine, the first composite adhesive layer 5 is applied to the surface of the aluminum layer of the transfer aluminum-plated film obtained in step 5, and the back of the food-grade base paper layer 6 is pasted on the adhesive layer; the food-grade base paper layer 6 is made of 32-78 g / m 2 UPM glassine paper, specifically 40g / m 2 UPM glassine paper; the first composite adhesive layer 5 uses water-based environmentally friendly transfer glue, which is applied by an anilox steel roller with a glue amount of 6 to 9 g / m2. The composite multilayer material is dried in an oven at 100 to 130°C for 4 to 6 sections, and then placed in a constant temperature and humidity room at 20 to 25°C and 40 to 55% HR for 8 to 12 hours of equilibrium maturation to form a transfer paper. (Steps 4 to 6 obtain the transfer coating 3, the first vacuum aluminum plating layer 4, the first composite adhesive layer 5, and the food-grade base paper layer 6 of this product.)

[0048] Step 7: On the wet laminating gantry machine, the biaxially oriented BOPET polyester film is peeled off and reused, and the high barrier coating 2 is evenly and finely coated on the transfer coating 3 of the transfer paper obtained in step 6 by air knife coating at the top coating seat; (the solid content of the high barrier coating 2 is 40±2%, the viscosity on the machine is 14-20 seconds, and the coating amount is 5-10 g / m 2;) After coating, it is dried in an oven at a temperature of 80 to 130°C for 5 to 6 times to promote the high barrier coating 2 to solidify and form a film on the transfer coating 3 to form a transfer paper for food packaging bags with high barrier properties. (Steps 4 to 7 obtain the high barrier coating 2, transfer coating 3, first vacuum aluminum coating layer 4, first composite adhesive layer 5, and food-grade base paper layer 6 of the product.)

[0049] Step 8: Apply the heat seal coating 1 evenly and finely on the surface of the high barrier coating 2 of the transfer paper with high barrier performance obtained in step 7 by air knife coating at the surface coating seat of the wet composite gantry machine; (the solid content of the heat seal coating 1 is 40±2%, the viscosity on the machine is 14-20 seconds, and the coating amount is 5-15g / m 2 ;) After coating, it is dried in an oven at 80-130°C for 5-6 times to promote the curing of the heat-seal coating 1 on the surface of the high-barrier coating 2 to form a transfer paper for food packaging bags with ultra-high moisture and oxygen resistance and heat-sealability. (Steps 4 to 8 obtain the heat-seal coating 1, high-barrier coating 2, transfer coating 3, first vacuum aluminum coating layer 4, first composite adhesive layer 5, and food-grade base paper layer 6 of the product.)

[0050] Step 9: Coat the second composite adhesive layer 7 on the surface of the vacuum aluminum-plated layer of the anti-counterfeiting laser transfer aluminum-plated film obtained in step 3 at the glue coating station of the dry laminating machine, and apply glue through a textured steel roller, with a glue amount of 4 to 7 g / m 2 (Steps 1 to 3 plus step 9 obtain the anti-counterfeiting laser information transfer coating 9, the second vacuum aluminum coating layer 8, and the second composite adhesive layer 7 attached to the BOPET film.)

[0051] After 2-3 sections of drying in an oven at a temperature of 80-130°C, the food-grade base paper layer 6 of the transfer paper obtained in step eight is pasted on the second composite adhesive layer 7. The composite multilayer material is then placed in a constant temperature and humidity room at a temperature of 20-25°C and a humidity of 40-55% HR for 8-12 hours of equilibrium maturation, and finally an anti-counterfeiting laser paper for food packaging bags with ultra-high moisture and oxygen resistance and heat-sealability is formed (at this time, this product is attached to a BOPET film).

[0052] Step 10: According to product requirements, the anti-counterfeiting laser paper for food packaging bags with ultra-high moisture and oxygen resistance and heat-sealability obtained in step 9 is peeled off into a roll product or cut into a single product on a peeling machine or a slitting machine, and the biaxially oriented BOPET polyester film is peeled off and reused. After the peeling is completed, that is, at this time, the product, i.e., the anti-counterfeiting laser transfer paper for food packaging bags with ultra-high moisture and oxygen resistance, is completely obtained.

[0053] In this embodiment, the biaxially oriented BOPET polyester film is not limited to the thickness selected in the above embodiment, but can be selected from the range of 12 to 18 μm. The resin composition and additives used in this biaxially oriented BOPET polyester film must comply with the provisions of GB 4806.7, GB 9685 and related announcements.

[0054] Advantages of the utility model:

[0055] An anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags is provided with an anti-counterfeiting laser information transfer coating 9, a second vacuum aluminum coating layer 8, a second composite adhesive layer 7, a food-grade base paper layer 6, a first composite adhesive layer 5, a first vacuum aluminum coating layer 4, a transfer coating 3, a high barrier coating 2, and a heat-sealing coating 1 from top to bottom. By providing an anti-counterfeiting laser information transfer coating 9, two aluminum coating layers, a high barrier coating 2, a heat-sealing coating 1, etc., the moisture and oxygen barrier properties of this product are stronger, and can reduce the contact between food and moisture and oxygen in a high humidity environment. By adopting a food-grade base paper layer 6 and a water-based composite adhesive for the composite adhesive layer, etc., this product complies with the production concept of environmental protection and pollution-free, and can be degraded and recycled. The overall structure of this product is simple and compact, the cost is low, and it has multiple functions such as aesthetics, anti-counterfeiting, and ultra-high barrier.

[0056] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. An anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags, comprising a heat seal coating (1), a transfer coating (3), a first vacuum aluminum coating layer (4), a first composite adhesive layer (5), and a food-grade base paper layer (6), characterized in that: The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag further comprises a high barrier coating (2), a second composite adhesive layer (7), a second vacuum aluminum-plated layer (8), and an anti-counterfeiting laser information transfer coating (9); the anti-counterfeiting laser information transfer coating (9), the second vacuum aluminum-plated layer (8), the second composite adhesive layer (7), the food-grade base paper layer (6), the first composite adhesive layer (5), the first vacuum aluminum-plated layer (4), the transfer coating (3), the high barrier coating (2), and the heat-sealing coating (1) are arranged in sequence from top to bottom.

2. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 1, characterized in that: The anti-counterfeiting laser information transfer coating (9) is a water-based acrylic copolymer.

3. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 2, characterized in that: The anti-counterfeiting laser information transfer coating (9) has a solid content of 10-25%, a softening point of 120-130°C, a machine viscosity of 18-25 seconds, and a dry coating amount of 0.9-1.1 g / m 2 .

4. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 1, characterized in that: The second composite adhesive layer (7) is a water-based dry composite adhesive with a coating amount of 4 to 7 g / m 2 .

5. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 4, characterized in that: The thickness of the first vacuum aluminum coating layer (4) and the second vacuum aluminum coating layer (8) are both 480 to 560 angstroms.

6. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 1, characterized in that: The high barrier coating (2) is a water-based acrylic polymer.

7. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 6, characterized in that: The heat-seal coating (1) is a water-based acrylic copolymer with a fineness of 0.1 micron, a solid content of 40±2%, a viscosity on the machine of 14 to 20 seconds, and a coating amount of 5 to 15 g / m 2 .

8. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 7, characterized in that: The transfer coating (3) is a water-based acrylic copolymer with a solid content of 10-25%, a softening point of 150-160°C, a machine viscosity of 18-25 seconds, and a dry coating amount of 1.1-1.4 g / m 2 .

9. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 8, characterized in that: The first composite adhesive layer (5) is a water-based transfer composite adhesive with a fineness of 0.14 microns, a solid content of 50±2%, a machine viscosity of 16 to 22 seconds, and a coating amount of 6 to 9 g / m 2 .

10. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bag according to claim 9, characterized in that: The food-grade base paper layer (6) is glassine paper with a grammage of 32 to 78 g / m 2 .

Images