Anti-counterfeiting laser transfer paper for ultra-high moisture- and oxygen-barrier food packaging bag

Abstract

An anti-counterfeiting laser transfer paper for an ultra-high moisture- and oxygen-barrier food packaging bag, comprising a heat sealing coating (1), a transfer coating (3), a first vacuum aluminized layer (4), a first composite adhesive layer (5), a food-grade base paper layer (6), a high-barrier coating (2), a second composite adhesive layer (7), a second vacuum aluminized layer (8), and an anti-counterfeiting laser information transfer coating (9), wherein the anti-counterfeiting laser information transfer coating (9), the second vacuum aluminized layer (8), the second composite adhesive layer (7), the food-grade base paper layer (6), the first composite adhesive layer (5), the first vacuum aluminized layer (4), the transfer coating (3), the high-barrier coating (2), and the heat sealing coating (1) are sequentially arranged from top to bottom. The anti-counterfeiting laser transfer paper for an ultra-high moisture- and oxygen-barrier food packaging bag has good moisture and oxygen barrier effects, can reduce the contact of food with moisture and oxygen in high-humidity environments, is environmentally friendly, recyclable, and cost-effective, and offers anti-counterfeiting properties and visual appeal.

Description

A type of anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags Technical Field

[0001] This utility model relates to the field of packaging materials, and in particular to an anti-counterfeiting laser transfer paper for food packaging bags with ultra-high moisture and oxygen barrier properties. Background Technology

[0002] Currently, there is a lack of anti-counterfeiting laser transfer paper for food packaging bags that can block moisture and oxygen in high-humidity transportation environments, thereby better preserving food. Utility Model Content

[0003] In view of the above-mentioned shortcomings, this utility model provides an anti-counterfeiting laser transfer paper for food packaging bags with ultra-high moisture and oxygen barrier properties. It has good moisture and oxygen barrier effects, which can reduce the contact between food and water and oxygen in high humidity environments. It is environmentally friendly, recyclable, low in cost, and anti-counterfeiting and aesthetically pleasing.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0005] An anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags includes a heat-sealing coating, a transfer coating, a first vacuum aluminized layer, a first composite adhesive layer, and a food-grade base paper layer. The ultra-high moisture and oxygen barrier food packaging bag anti-counterfeiting laser transfer paper also includes a high-barrier coating, a second composite adhesive layer, a second vacuum aluminized layer, and an anti-counterfeiting 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-sealing coating are arranged sequentially from top to bottom.

[0006] According to one aspect of this utility model, the anti-counterfeiting laser information transfer coating is an aqueous acrylic copolymer.

[0007] According to one aspect of this utility model, the anti-counterfeiting laser information transfer coating has a solid content of 10-25%, a softening point of 120-130℃, an on-machine viscosity of 18-25 seconds, and a dry coating weight of 0.9-1.1 g / m³. 2 .

[0008] According to one aspect of this utility model, the second composite adhesive layer is a water-based dry composite adhesive, and its coating amount is 4-7 g / m². 2 .

[0009] According to one aspect of the present invention, the thickness of both the first vacuum-plated aluminum layer and the second vacuum-plated aluminum layer is 480 to 560 angstroms.

[0010] According to one aspect of this utility model, the high-barrier coating is an aqueous acrylic polymer.

[0011] According to one aspect of this utility model, the heat-sealing coating is an aqueous acrylic copolymer with a fineness of 0.1 micrometers, a solid content of 40±2%, an on-machine viscosity of 14-20 seconds, and a coating weight of 5-15 g / m³. 2 .

[0012] According to one aspect of this utility model, the transfer coating is an aqueous acrylate copolymer with a solid content of 10-25%, a softening point of 150-160°C, an on-machine viscosity of 18-25 seconds, and a dry coating weight of 1.1-1.4 g / m³. 2 .

[0013] According to one aspect of this utility model, the first composite adhesive layer is a water-based transfer composite adhesive with a fineness of 0.14 micrometers, a solid content of 50±2%, an on-machine viscosity of 16-22 seconds, and a coating weight of 6-9 g / m³. 2 .

[0014] According to one aspect of this utility model, the food-grade base paper layer is glassine paper with a basis weight of 32-78 g / m². 2 .

[0015] Advantages of this invention: A high-moisture-barrier and oxygen-barrier food packaging bag anti-counterfeiting laser transfer paper, consisting of, from top to bottom, an anti-counterfeiting laser information transfer coating, a second vacuum aluminized layer, a second composite adhesive layer, a food-grade base paper layer, a first composite adhesive layer, a first vacuum aluminized layer, a transfer coating, a high-barrier coating, and a heat-sealing coating. By incorporating the anti-counterfeiting laser information transfer coating, two aluminized layers, a high-barrier coating, and a heat-sealing coating, this product exhibits enhanced moisture and oxygen barrier properties, reducing contact between food and moisture and oxygen in high-humidity environments. By using a food-grade base paper layer and a water-based composite adhesive for the composite adhesive layer, this product conforms to the concept of environmentally friendly and pollution-free production, and is biodegradable and recyclable. The product has a simple and compact overall structure, low cost, and multiple functions including aesthetics, anti-counterfeiting, and high barrier properties. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a schematic diagram of the structure of this utility model.

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

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

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

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

[0023] In this embodiment, the anti-counterfeiting laser information transfer coating 9 is a water-based acrylic copolymer, specifically a copolymer of methyl methacrylate, butyl methacrylate, and methacrylic acid. The anti-counterfeiting laser information transfer coating 9 has a solid content of 10–25%, a softening point of 120–130°C, an on-machine viscosity of 18–25 seconds, and a dry coating weight of 0.9–1.1 g / m³. 2 This coating adheres well to aluminum, releases well from BOPET film, produces clear and glossy molded gratings, and is printable. Its resin composition and additives comply 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 its coating amount is 4-7 g / m². 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 plating layer 4 and the second vacuum aluminum plating layer 8 have the same structure, and both have a thickness of 480 to 560 angstroms. Both are formed by heating and vaporizing aluminum wire with a purity of 99.9% at high temperature in a vacuum aluminum plating device, then cooling and depositing it on the surface of a thin film.

[0026] In this embodiment, the high-barrier coating 2 is a water-based acrylic polymer, which, when coated on the aluminum layer, exhibits ultra-high moisture and oxygen barrier properties. The resin composition and additives used comply with the provisions of GB 4806.6, GB 9685, and related announcements. The high-barrier coating 2 has a fineness of 0.1 micrometers, a solid content of 40±2%, a pH value of 6.0–8.0, and a viscosity (measured in a No. 4 cup at 25°C) of 14–20 seconds. The coating weight is 5–10 g / m³. 2 .

[0027] In this embodiment, the heat-sealable coating 1 is a water-based acrylate copolymer with oil- and water-resistant properties, suitable for contact with various foods. Its resin composition and additives comply with GB 4806.6, GB 9685, and related announcements. The heat-sealable coating 1 has a fineness of 0.1 micrometers, a solid content of 40±2%, a pH value of 6.0–8.0, and a viscosity (measured in a No. 4 cup at 25°C) of 14–20 seconds. The coating weight is 5–15 g / m³. 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 adheres well to aluminum and releases well from BOPET film. Its resin composition and additives comply with the provisions of GB 4806.10, GB 9685, and related announcements. The solid content of the transfer coating 3 is 10-25%, the softening point is 150-160°C, the viscosity on the machine is 18-25 seconds, and the dry coating weight is 1.1-1.4 g / m³. 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 resin composition and additives used comply with the provisions of GB 4806.6, GB 9685, and related announcements, and it possesses acid and alcohol resistance properties. The fineness of the first composite adhesive layer 5 is 0.14 micrometers, the solid content is 50±2%, the pH value is 6.0~8.0, and the viscosity (measured under conditions of Coat No. 4 cup and temperature of 25°C) is 16~22 seconds. The coating amount is 6~9 g / m³. 2 .

[0030] In this embodiment, the basis weight of the food-grade base paper layer 6 is 32–78 g / m². 2 The food-grade base paper layer 6 uses 40g / m² 2 UPM glassine paper.

[0031] Example 2

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

[0033] In this embodiment, the anti-counterfeiting laser information transfer coating 9 is a water-based acrylic copolymer, specifically a copolymer of methyl methacrylate, butyl methacrylate, and methacrylic acid. The anti-counterfeiting laser information transfer coating 9 has a solid content of 10–25%, a softening point of 120–130°C, an on-machine viscosity of 18–25 seconds, and a dry coating weight of 0.9–1.1 g / m³. 2 This coating adheres well to aluminum, releases well from BOPET film, produces clear and glossy molded gratings, and is printable. Its resin composition and additives comply 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 its coating amount is 4-7 g / m². 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 plating layer 4 and the second vacuum aluminum plating layer 8 have the same structure, and both have a thickness of 480 to 560 angstroms. Both are formed by heating and vaporizing aluminum wire with a purity of 99.9% at high temperature in a vacuum aluminum plating device, then cooling and depositing it on the surface of a thin film.

[0036] In this embodiment, the high-barrier coating 2 is a water-based acrylic polymer, which, when coated on the aluminum layer, exhibits ultra-high moisture and oxygen barrier properties. The resin composition and additives used comply with the provisions of GB 4806.6, GB 9685, and related announcements. The high-barrier coating 2 has a fineness of 0.1 micrometers, a solid content of 40±2%, a pH value of 6.0–8.0, and a viscosity (measured in a No. 4 cup at 25°C) of 14–20 seconds. The coating weight is 5–10 g / m³. 2 .

[0037] In this embodiment, the heat-sealable coating 1 is an oil-resistant and heat-sealable water-based acrylate copolymer that can be used in contact with various foods. Its resin composition and additives comply with the provisions of GB 4806.6, GB 9685, and related announcements. The heat-sealable coating 1 has a fineness of 0.1 micrometers, a solid content of 40±2%, a pH value of 6.0–8.0, and a viscosity (measured in a No. 4 cup at 25°C) of 14–20 seconds. The coating weight is 5–15 g / m³.2 .

[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 adheres well to aluminum and releases well from BOPET film. Its resin composition and additives comply with the provisions of GB 4806.10, GB 9685, and related announcements. The solid content of the transfer coating 3 is 10-25%, the softening point is 150-160°C, the viscosity on the machine is 18-25 seconds, and the dry coating weight is 1.1-1.4 g / m³. 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 resin composition and additives used comply with the provisions of GB 4806.6, GB 9685, and related announcements, and it possesses acid and alcohol resistance properties. The fineness of the first composite adhesive layer 5 is 0.14 micrometers, the solid content is 50±2%, the pH value is 6.0~8.0, and the viscosity (measured under conditions of Coat No. 4 cup and temperature of 25°C) is 16~22 seconds. The coating amount is 6~9 g / m³. 2 .

[0040] In this embodiment, the basis weight of the food-grade base paper layer 6 is 32–78 g / m². 2 The food-grade base paper layer 6 uses 40g / m² 2 UPM glassine paper.

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

[0042] Step 1: Apply a water-based, environmentally friendly, food-grade anti-counterfeiting laser information transfer coating 9 to the surface of a 15µm thick biaxially oriented polyester film (BOPET film) at a coating speed of 100–130 m / min using a coating machine. Dry and cure in an oven to form a coated film. (The anti-counterfeiting laser information transfer coating 9 has a solid content of 20–25%, a softening point of 120–130℃, a working viscosity of 18–25 seconds, and a dry coating weight of 0.9–1.1 g / m³.) 2 。 )

[0043] Step two involves laser holographic embossing of the anti-counterfeiting laser information transfer coating film on a laser embossing machine. The embossing method is a hard-press seamless embossing. After laser embossing, the anti-counterfeiting laser information transfer coating 9 is recorded on the biaxially oriented PET polyester film transfer coating 3, forming the anti-counterfeiting laser transfer coating film. The embossing temperature in this step is 150–165℃, and the embossing speed is 60–80 m / min.

[0044] Step 3: Use a vacuum aluminizing machine to heat high-purity aluminum wire at 10... -2 ~10 -3 Under vacuum conditions of Pa, the material is heated to approximately 1400 degrees Celsius and vaporized. After cooling, it adheres 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 480–560 angstroms. (Steps one to three yield 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 to the surface of a 12µm thick biaxially oriented BOPET polyester film at a coating speed of 100–130 m / min using a coating machine. Dry and cure in an oven to form a transfer-coated film with a solid content of 10–25%, a softening point of 150–160℃, an on-machine viscosity of 18–25 seconds, and a dry coating weight of 1.1–1.4 g / m³. 2 .

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

[0047] Step six: On the wet laminating gantry machine, apply the first composite adhesive layer 5 to the surface of the aluminum layer of the transferred aluminized film obtained in step five onto the adhesive base, and then attach the back of the food-grade base paper layer 6 to the adhesive layer; the food-grade base paper layer 6 uses 32-78 g / m³. 2 UPM glassine paper, specifically 40g / m² 2 The UPM glassine paper is used; the first composite adhesive layer 5 uses a water-based environmentally friendly transfer adhesive, applied via an anilox steel roller at a rate of 6–9 g / m². The multilayered material is dried in 4–6 ovens at 100–130°C, then placed in a constant temperature and humidity chamber at 20–25°C and 40–55% HR for 8–12 hours to achieve equilibrium curing, forming the transfer paper. (Steps four to six yield the transfer coating 3, the first vacuum aluminized layer 4, the first composite adhesive layer 5, and the food-grade base paper layer 6 of this product.)

[0048] Step 7: On a wet laminating gantry mill, peel off the biaxially oriented BOPET polyester film for reuse. Apply the high-barrier coating 2 evenly and finely to the transfer paper transfer coating 3 obtained in Step 6 using an air knife coating method at the top coating station; (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 / m²). 2;) After coating, the material is dried in an oven at 80-130℃ for 5-6 sections to promote the curing of the high-barrier coating 2 onto the transfer coating 3, forming a transfer paper for food packaging bags with high barrier properties. (Steps four to seven yield the high-barrier coating 2, transfer coating 3, first vacuum aluminized layer 4, first composite adhesive layer 5, and food-grade base paper layer 6 of this product.)

[0049] Step 8: Apply the heat-sealing coating 1 evenly and finely to the surface of the high-barrier coating 2 of the transfer paper obtained in Step 7 using an air knife coating method at the surface coating seat of the wet laminating gantry machine; (Heat-sealing coating 1 has a solid content of 40±2%, a viscosity of 14-20 seconds on the machine, and a coating amount of 5-15 g / m²). 2 ;) After coating, the material is dried in an oven at 80-130℃ for 5-6 sections to promote the curing of the heat-sealing coating 1 onto the surface of the high-barrier coating 2, forming a transfer paper for food packaging bags with ultra-high moisture and oxygen barrier properties that can be heat-sealed. (Steps four to eight yield the following components: heat-sealing coating 1, high-barrier coating 2, transfer coating 3, first vacuum-metallized layer 4, first composite adhesive layer 5, and food-grade base paper layer 6.)

[0050] Step 9: Apply the second composite adhesive layer 7 to the surface of the vacuum aluminized layer of the anti-counterfeiting laser transfer aluminized film obtained in Step 3 at the glue application station of the dry laminating machine. Apply the adhesive using a textured steel roller, with an adhesive application amount of 4-7 g / m². 2 (Steps one through three plus step nine together yield the anti-counterfeiting laser information transfer coating 9, the second vacuum aluminized layer 8, and the second composite adhesive layer 7 attached to the BOPET film.)

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

[0052] Step 10: According to product requirements, peel the ultra-high moisture and oxygen barrier heat-sealable anti-counterfeiting laser paper for food packaging bags obtained in Step 9 into rolls or cut into individual sheets using a peeling machine or slitting machine. Simultaneously, peel off the biaxially oriented BOPET polyester film for reuse. After peeling is complete, the product, ultra-high moisture and oxygen barrier anti-counterfeiting laser transfer paper for food packaging bags, is obtained.

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

[0054] Advantages of this utility model:

[0055] A type of anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags comprises, from top to bottom, an anti-counterfeiting laser information transfer coating 9, a second vacuum aluminized layer 8, a second composite adhesive layer 7, a food-grade base paper layer 6, a first composite adhesive layer 5, a first vacuum aluminized layer 4, a transfer coating 3, a high-barrier coating 2, and a heat-sealing coating 1. By incorporating the anti-counterfeiting laser information transfer coating 9, two aluminized layers, the high-barrier coating 2, and the heat-sealing coating 1, this product exhibits enhanced moisture and oxygen barrier properties, reducing the contact between food and moisture and oxygen in high-humidity environments. By using the food-grade base paper layer 6 and water-based composite adhesives in the composite adhesive layer, this product conforms to the concept of environmentally friendly and pollution-free production, and is biodegradable and recyclable. The product has a simple and compact overall structure, low cost, and multiple functions including aesthetics, anti-counterfeiting, and ultra-high barrier properties.

[0056] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high moisture and oxygen barrier food packaging bag anti-counterfeiting laser transfer paper, comprising a heat-sealing coating (1), a transfer coating (3), a first vacuum aluminized layer (4), a first composite adhesive layer (5), and a food-grade base paper layer (6), characterized in that, The ultra-high moisture and oxygen barrier food packaging bag anti-counterfeiting laser transfer paper also includes a high barrier coating (2), a second composite adhesive layer (7), a second vacuum aluminized layer (8), and an anti-counterfeiting laser information transfer coating (9). The anti-counterfeiting laser information transfer coating (9), the second vacuum aluminized layer (8), the second composite adhesive layer (7), the food-grade base paper layer (6), the first composite adhesive layer (5), the first vacuum aluminized layer (4), the transfer coating (3), the high barrier coating (2), and the heat-sealing coating (1) are arranged sequentially from top to bottom.

2. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags 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 bags 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℃, an on-machine viscosity of 18-25 seconds, and a dry coating weight of 0.9-1.1 g / m³. 2 .

4. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags 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 4-7 g / m². 2 .

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

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

7. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags according to claim 6, characterized in that, The heat-sealing coating (1) is an aqueous acrylic copolymer with a fineness of 0.1 micrometers, a solid content of 40±2%, an on-machine viscosity of 14-20 seconds, and a coating weight of 5-15 g / m³. 2 .

8. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags according to claim 7, characterized in that, The transfer coating (3) is a water-based acrylate copolymer with a solid content of 10-25%, a softening point of 150-160℃, an on-machine viscosity of 18-25 seconds, and a dry coating weight of 1.1-1.4 g / m³. 2 .

9. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags 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 micrometers, a solid content of 50±2%, an on-machine viscosity of 16-22 seconds, and a coating weight of 6-9 g / m³. 2 .

10. The anti-counterfeiting laser transfer paper for ultra-high moisture and oxygen barrier food packaging bags according to claim 9, characterized in that, The food-grade base paper layer (6) is glassine paper with a basis weight of 32-78 g / m2. 11.

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