High-transparency shrink film produced from full-degradable material

Abstract

The utility model discloses a highly transparent shrink film made of fully degradable materials, which comprises a PHA (polyhydroxyalkanoate) main body film layer, a biological photosensitive degradation layer is arranged on one side of the PHA main body film layer, a nano-reinforced transparent layer is arranged on one side of the biological photosensitive degradation layer, a biological composite layer is arranged on one side of the nano-reinforced transparent layer, and the biological composite layer is arranged on the other side of the nano-reinforced transparent layer. An anti-infrared composite layer is arranged on the other side of the PHA main body film layer, and the PHA main body film layer, the biological photosensitive degradation layer, the nano reinforced transparent layer, the biological composite layer and the anti-infrared composite layer are bonded through an adhesive. The full-degradable material can be decomposed into harmless substances through microbial action or other natural processes in the natural environment, the influence on the environment is small, the requirement of sustainable development is met, the high-transparency shrink film produced by the full-degradable material generally has high transparency, products in a package can be clearly displayed, and the product quality is improved. And the product display effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat shrink films, in particular to a high-transparency shrink film produced by using fully degradable materials. Background Art

[0002] Heat shrink film is used for the sale and transportation of various products. Its main function is to stabilize, cover and protect the products.

[0003] The Chinese patent application number 202320461383.7 discloses a high barrier anti-fog shrink film. The existing heat shrink film solves the problem that the mist water evaporated from the soy sauce food on the packaging film accumulates into water droplets and drips on the food, affecting the taste of the food. However, it has the following problems:

[0004] Poor environmental friendliness: Although it provides excellent barrier and anti-fog performance, it may contain non-fully degradable materials such as polyamide layer, ethylene-vinyl alcohol copolymer coating, etc. These materials may not be easily degraded in the natural environment, resulting in long-term environmental pollution.

[0005] High production complexity: Multi-layer structure means more steps and materials are required in the production process, which increases the complexity and cost of production. At the same time, multi-layer structure may also lead to an increase in the scrap rate in the production process.

[0006] High recycling difficulty: Due to the multi-layer structure and the combination of different materials, there may be challenges in separating different materials during recycling. This increases the difficulty and cost of recycling and reduces the overall recyclability.

[0007] Low transparency: Although the high barrier anti-fog shrink film has anti-fog function, its multi-layer structure and the use of certain materials may affect its overall transparency. Utility Model Content

[0008] The utility model aims to provide a highly transparent shrink film produced by fully degradable materials to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a highly transparent shrink film produced with fully degradable materials, comprising a PHA main film layer, a bio-photosensitive degradation layer is arranged on one side of the PHA main film layer, a nano-reinforced transparent layer is arranged on one side of the bio-photosensitive degradation layer, a bio-composite layer is arranged on one side of the nano-reinforced transparent layer, and an anti-infrared composite layer is arranged on the other side of the PHA main film layer, and the PHA main film layer, the bio-photosensitive degradation layer, the nano-reinforced transparent layer, the bio-composite layer and the anti-infrared composite layer are bonded by an adhesive.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The fully degradable material of the utility model can be decomposed into harmless substances through the action of microorganisms or other natural processes in the natural environment, has little impact on the environment, and meets the requirements of sustainable development.

[0012] The highly transparent shrink film produced from the fully biodegradable material of the utility model generally has high transparency, can clearly display the product in the package, and improve the display effect of the product.

[0013] In the utility model, since the structure of the high-transparency shrink film produced by the fully degradable material is relatively simple, fewer steps and materials may be required in the production process, thereby improving the production efficiency and reducing the production cost.

[0014] The highly transparent shrink films produced from the fully degradable materials of the utility model may have more advantages in recycling and reuse because they can be more easily processed through biodegradation or other means, reducing the need for complex recycling technology.

[0015] With the improvement of environmental awareness and the popularization of the concept of sustainable development, consumers and enterprises are more and more inclined to choose environmentally friendly products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 A schematic diagram of the biocomposite layer of the utility model;

[0018] Figure 3 This is a schematic diagram of the infrared protection composite layer of the utility model.

[0019] In the figure: 1. PHA main film layer; 2. Bio-photosensitive degradation layer; 3. Nano-enhanced transparent layer; 4. Bio-composite layer; 5. Anti-infrared composite layer; 6. Bio-based plasticizer adjustment layer; 7. Bio-identification label layer; 8. Anti-hydrolysis layer; 9. Plant fiber reinforced mesh layer; 10. Infrared reflection and heat insulation layer; 11. Bio-enzyme catalysis layer; 12. Weather-resistant and anti-ultraviolet layer. 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] See also Figure 1-3The utility model provides a technical solution: a highly transparent shrink film produced with fully degradable materials, comprising a PHA main film layer 1, a biophotodegradable layer 2 is arranged on one side of the PHA main film layer 1, a nano-reinforced transparent layer 3 is arranged on one side of the biophotodegradable layer 2, a bio-composite layer 4 is arranged on one side of the nano-reinforced transparent layer 3, an anti-infrared composite layer 5 is arranged on the other side of the PHA main film layer 1, and the PHA main film layer 1, the biophotodegradable layer 2, the nano-reinforced transparent layer 3, the bio-composite layer 4 and the anti-infrared composite layer 5 are bonded by an adhesive.

[0022] The bio-composite layer 4 includes a bio-based plasticizing adjustment layer 6, a biometric identification label layer 7, an anti-hydrolysis layer 8 and a plant fiber reinforced mesh layer 9 which are arranged in sequence from the inside to the outside. The bio-based plasticizing adjustment layer 6, the biometric identification label layer 7, the anti-hydrolysis layer 8 and the plant fiber reinforced mesh layer 9 are bonded together by an adhesive.

[0023] The infrared-proof composite layer 5 includes an infrared-reflecting heat-insulating layer 10, a biological enzyme catalytic layer 11 and a weather-resistant and anti-ultraviolet layer 12 arranged in sequence from the inside to the outside. The infrared-reflecting heat-insulating layer 10, the biological enzyme catalytic layer 11 and the weather-resistant and anti-ultraviolet layer 12 are bonded by an adhesive.

[0024] The thickness of the PHA main film layer 1 is 45-55 μm, the thickness of the bio-photodegradable layer 2 is 10-25 μm, and the thickness of the nano-reinforced transparent layer 3 is 12-18 μm.

[0025] The bio-based plasticizing adjustment layer 6, the biometric identification label layer 7, the anti-hydrolysis layer 8 and the plant fiber reinforced mesh layer 9, the bio-based plasticizing adjustment layer 6 has a thickness of 10-20 μm, the biometric identification label layer 7 has a thickness of 0.1-2 μm, the anti-hydrolysis layer 8 has a thickness of 5-20 μm, and the plant fiber reinforced mesh layer 9 has a thickness of 10-12 μm.

[0026] The infrared reflecting heat insulating layer 10, the biological enzyme catalytic layer 11 and the weather resistant and anti-ultraviolet layer 12, the infrared reflecting heat insulating layer 10 has a thickness of 5-30 μm, the biological enzyme catalytic layer 11 has a thickness of 0.5-5 μm, and the weather resistant and anti-ultraviolet layer 12 has a thickness of 30-50 μm.

[0027] The outermost layer, the weather-resistant and anti-ultraviolet layer 12: its main function is to resist the erosion of ultraviolet rays and improve the weather resistance of the film when used outdoors.

[0028] Biological enzyme catalytic layer 11: it is added on the inner side of the weather-resistant and anti-ultraviolet layer, and its main function is to promote the biodegradation process of the membrane under specific environment.

[0029] Infrared reflection and heat insulation layer 10: Its function is to reflect infrared rays, reduce the thermal conductivity of the film, and provide heat insulation. The outer side of this layer (i.e. the side facing the bio-enzyme catalytic layer) is coated with a water-soluble polymer coating to provide temporary waterproof performance.

[0030] PHA main film layer 1: This is the main component of the shrink film. PHA (polyhydroxyalkanoate) is a biodegradable polyester material.

[0031] Biological photodegradable layer 2: Its main function is to enhance the photodegradation performance of the film, making the film more easily decomposed under light conditions.

[0032] Nano-reinforced transparent layer 3: The main function of this layer is to improve the transparency and mechanical strength of the film.

[0033] Bio-based plasticizing adjustment layer 6: used to adjust the plasticizing properties of the film.

[0034] Biometric tag layer 7: Its main function is to provide biometric functionality to ensure product authenticity and traceability.

[0035] Anti-hydrolysis layer 8: The main function is to improve the stability of the membrane in a humid environment and prevent performance degradation due to moisture intrusion.

[0036] Innermost layer - plant fiber reinforced mesh layer 9: This layer not only improves the mechanical strength of the membrane, but also further enhances its biodegradability.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly transparent shrink film produced from fully biodegradable materials, comprising a PHA main film layer (1), characterized in that: A biophotodegradable layer (2) is arranged on one side of the PHA main film layer (1), a nano-reinforced transparent layer (3) is arranged on one side of the biophotodegradable layer (2), a biocomposite layer (4) is arranged on one side of the nano-reinforced transparent layer (3), and an infrared-proof composite layer (5) is arranged on the other side of the PHA main film layer (1); the PHA main film layer (1), the biophotodegradable layer (2), the nano-reinforced transparent layer (3), the biocomposite layer (4), and the infrared-proof composite layer (5) are bonded together by an adhesive.

2. The highly transparent shrink film produced from fully degradable materials according to claim 1, characterized in that: The biocomposite layer (4) comprises a bio-based plasticizing adjustment layer (6), a bio-identification label layer (7), an anti-hydrolysis layer (8) and a plant fiber reinforced mesh layer (9) which are arranged in sequence from the inside to the outside, and the bio-based plasticizing adjustment layer (6), the bio-identification label layer (7), the anti-hydrolysis layer (8) and the plant fiber reinforced mesh layer (9) are bonded together by an adhesive.

3. The highly transparent shrink film produced from fully degradable materials according to claim 1, characterized in that: The infrared-proof composite layer (5) comprises an infrared-reflecting heat-insulating layer (10), a biological enzyme catalytic layer (11), and a weather-resistant and anti-ultraviolet layer (12) which are arranged in sequence from the inside to the outside, and the infrared-reflecting heat-insulating layer (10), the biological enzyme catalytic layer (11), and the weather-resistant and anti-ultraviolet layer (12) are bonded together by an adhesive.

4. The highly transparent shrink film produced from fully degradable materials according to claim 1, characterized in that: The thickness of the PHA main film layer (1) is 45-55 μm, the thickness of the biophotodegradable layer (2) is 10-25 μm, and the thickness of the nano-reinforced transparent layer (3) is 12-18 μm.

5. The highly transparent shrink film produced from fully degradable materials according to claim 2, characterized in that: The bio-based plasticizing adjustment layer (6) has a thickness of 10-20 μm, the biometric identification label layer (7) has a thickness of 0.1-2 μm, the anti-hydrolysis layer (8) has a thickness of 5-20 μm, and the plant fiber reinforced mesh layer (9) has a thickness of 10-12 μm.

6. The highly transparent shrink film produced from fully degradable materials according to claim 3, characterized in that: The infrared reflection and heat insulation layer (10) has a thickness of 5-30 μm, the bio-enzyme catalysis layer (11) has a thickness of 0.5-5 μm, and the weather-resistant and anti-ultraviolet layer (12) has a thickness of 30-50 μm.

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