Degradable composite antirust film

Abstract

The utility model provides a degradable composite anti-rust film, which relates to the field of composite anti-rust films and comprises an outer layer and an inner layer, the outer layer is in composite connection with the inner layer, the outer layer comprises a first elastic layer and a second elastic layer, a base film layer is arranged between the first elastic layer and the second elastic layer, the inner layer comprises a loading layer, and the loading layer is arranged between the first elastic layer and the second elastic layer. The inner side of the loading layer is provided with loading holes, nanoscale anti-rust particles are arranged in the loading layer, the outer side of the loading layer is provided with a polyurethane elastic film, and the outer side of the polyurethane elastic film is provided with a waterproof film. The degradable composite anti-rust film solves the problems that a gasification molecular layer and a metal adsorption surface of an existing degradable composite anti-rust film are thin, and gasification diffusion duration is short.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite antirust film technical field, concretely relates to a degradable composite antirust film. BACKGROUND

[0002] The overall scale of China's environmental protection industry is relatively small, and its boundaries and connotations are still expanding and enriching. Various plastic products have greatly enriched people's lives, but waste plastics decompose very slowly in nature, and it takes decades or even hundreds of years to completely decompose. Therefore, with the development of China's social economy and the adjustment of industrial structure, China's environmental protection industry will make a greater direct contribution to the national economy, and gradually become an industry that improves economic operation quality, promotes economic growth and improves economic and technical level. The direction of the expansion of the connotation of the industry will mainly focus on clean technology, clean products and environmental services, and the concept of China's environmental protection industry will evolve into "environmental industry" or "green industry". Natural degradation reduces the stability of plastic packaging materials and makes them more easily degradable in the natural environment. It reduces the serious situation of environmental pollution. In recent years, traditional antirust bags are gradually being replaced by degradable antirust films.

[0003] The antirust film is used for wrapping metal devices or articles that need to be stored to prevent rust during storage. After searching, the prior art (publication number: CN109132198A) records "a VCI degradable antirust film composed of an outer layer and an inner layer. The outer layer is prepared from the following raw materials by weight: polyvinyl alcohol 100-150 parts, starch 50-90 parts, photosensitizer 20-40 parts and biodegradable agent 20-50 parts; the inner layer is a gas phase corrosion inhibitor mixed layer prepared from the following raw materials by weight: PP resin 100-120 parts, ammonium chromate 10-30 parts, benzoic acid monoethanolamine 15-25 parts, o-nitrophenol dicyclohexylamine 20-40 parts, cyclohexylamine 10-20 parts, calcium carbonate 30-50 parts, talc 10-20 parts, plasticizer 15-25 parts, sodium benzoate 5-15 parts, dextrin 2-6 parts, benzene propyl triazole 3-9 parts, sodium molybdate 3-9 parts, hydroxyethyl cellulose 3-8 parts, zinc stearate 4-10 parts and polyethylene wax 4-10 parts. The present application achieves ideal degradation effect, and breaks through the limitation of antirust, has wide application, simple preparation method and easy operation."

[0004] While existing composite anti-rust films achieve rust prevention, they still have some shortcomings: Firstly, existing composite anti-rust films generally achieve rust prevention by laminating rust inhibitors onto the film layer. However, the existing film material has elasticity deviations, preventing it from adhering closely to the metal object. This results in a large encapsulation space, leading to a thin molecular layer formed on the metal surface after the rust inhibitor vaporizes and diffuses, thus reducing the protective effect. Secondly, the composite rust inhibitor vaporizes and diffuses rapidly under normal temperature and pressure, preventing the rust inhibitor within the film from continuously vaporizing and diffusing, thereby affecting the duration of rust prevention on the metal. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, a biodegradable composite rust-preventive film is provided to solve the problems of thin vaporization molecular layer and metal adsorption surface, and short vaporization diffusion duration in existing biodegradable composite rust-preventive films.

[0006] To achieve the above objectives, a biodegradable composite anti-rust film is provided, comprising: an outer layer and an inner layer, wherein the outer layer and the inner layer are compositely connected, and the outer layer includes a first elastic layer and a second elastic layer, wherein a base film layer is provided between the first elastic layer and the second elastic layer; the inner layer includes a loading layer, wherein a loading hole is provided on the inner side of the loading layer, and nano-sized anti-rust particles are provided inside the loading layer; a polyurethane elastic film is provided on the outer side of the loading layer, and a waterproof film is provided on the outer side of the polyurethane elastic film.

[0007] Furthermore, the first elastic layer is made of gelatin-based biogel material, and the second elastic layer is made of shell-like transparent film material.

[0008] Furthermore, the base film layer is made of polyvinyl alcohol and is compounded with starch, photosensitizer and biodegradable agent.

[0009] Furthermore, the loading layer is made of starch-based film material, and multiple loading holes are opened on the inner side of the loading layer, and a waterproof and breathable membrane is provided at the outer opening of the loading holes.

[0010] Furthermore, the loading hole extends outward into the interior of the polyurethane elastic membrane, and nano-scale anti-rust particles are disposed on the inner side of the waterproof membrane.

[0011] Furthermore, the nano-scale rust-preventive particles are configured as a vapor phase corrosion inhibitor mixture layer.

[0012] Furthermore, the outer and inner layers have the same thickness, and release paper is bonded to the inner side of the inner layer.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By utilizing the first elastic layer and the first elastic layer included in the outer layer, and the polyurethane elastic film included in the inner layer, the composite anti-rust film has a good elastic effect, so that it can make close contact with the outer wall of the metal object when it is wrapped, thereby reducing the interlayer space with the metal object. For large metal equipment, it reduces the footprint after wrapping. At the same time, it facilitates the rapid formation of a molecular film layer on the surface of the metal object after the rust inhibitor vaporizes and diffuses, thereby improving the protective effect.

[0015] 2. The inner layer includes a loading layer and loading holes, which facilitates the integration of nano-scale rust-preventive particles into the inner layer. The nano-scale rust-preventive particles are encapsulated through a waterproof membrane and a waterproof and breathable membrane, thereby increasing the amount of rust-preventive material and extending the vaporization time of the rust-preventive agent. This allows for the continuous diffusion of rust-preventive agent molecules on the outside of the metal, thus extending the rust-preventive effect time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the outer and inner layer structures of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the layered structure of the outer material in an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the inner layer material layer structure of an embodiment of the present utility model.

[0019] Figure 4 This is an embodiment of the present utility model. Figure 3 Schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 1. Outer layer; 11. First elastic layer; 12. Base film layer; 13. Second elastic layer; 2. Inner layer; 21. Loading layer; 211. Loading hole; 212. Waterproof and breathable membrane; 213. Nanoscale anti-rust particles; 22. Polyurethane elastic membrane; 23. Waterproof membrane. Detailed Implementation

[0021] Reference Figures 1 to 4 As shown, this utility model provides a biodegradable composite anti-rust film, comprising: an outer layer 1 and an inner layer 2, the outer layer 1 and the inner layer 2 being compositely connected, the outer layer 1 and the inner layer 2 having the same thickness, and release paper being adhered to the inner side of the inner layer 2, the outer layer 1 comprising a first elastic layer 11 and a second elastic layer 13, and a base film layer 12 being provided between the first elastic layer 11 and the second elastic layer 13, the inner layer 2 comprising a loading layer 21, and loading holes 211 being provided on the inner side of the loading layer 21, and nano-level anti-rust particles 213 being provided inside the loading layer 21, a polyurethane elastic film 22 being provided on the outer side of the loading layer 21, and a waterproof film 23 being provided on the outer side of the polyurethane elastic film 22.

[0022] In the embodiment, the outer layer 1 and the inner layer 2 constitute the main structure of the degradable composite anti-rust film involved in the application, and the outer layer 1 and the inner layer 2 are prepared by double-layer co-extrusion method.

[0023] Specifically, the loading layer 21 of the inner layer 2 is on the side of the wrapped metal object, and the release paper is attached to one side of the loading layer 21, so that the diffusion molecules of the internal nano-scale anti-rust particles 213 are sealed before use.

[0024] Specifically, the preparation process of the nano-scale anti-rust particles 213 is as follows: ammonium chromate, monoethanolamine benzoate, o-nitrophenol dicyclohexylamine, sodium benzoate, dextrin, benzene propyl triazole, sodium molybdate, hydroxyethyl cellulose, zinc stearate, polyethylene wax and cyclohexylamine are mixed and dissolved in ethanol, stirred uniformly, heated to 50℃ for pretreatment for 40min, 1 / 2 of the PP resin, calcium carbonate, talc and diisodecyl phthalate are added, high-speed stirring and mixing, granulation, granulation process parameters: main machine speed 30r / min, feeding speed 500r / min, cutting speed 700r / min, one zone temperature 130℃, two zone temperature 138℃, three zone temperature 145℃, four zone temperature 150℃, five zone temperature 146℃, melt temperature 142℃, 1 / 2 of the PP resin is added, mixed, blown into a film, and the blown film process parameters are: main machine speed 20r / min, pulling speed 8m / min, one zone temperature 155℃, two zone temperature 162℃, three zone temperature 175℃, four zone temperature 172℃, five zone temperature 170℃.

[0025] As a preferred embodiment, by setting the polyurethane elastic film 22, on the one hand, the degradable function is realized, and on the other hand, the elastic modulus of the whole anti-rust film is increased, so that it can be tightly attached to the outer wall of the metal object.

[0026] As Figures 2 to 4 In the embodiment, the first elastic layer 11 is made of gelatin-based biological gel material, the second elastic layer 13 is made of imitation shell transparent film material, the base film layer 12 is made of polyvinyl alcohol material and is compounded with starch, photosensitizer and biodegradable agent, the loading layer 21 is made of starch-based film material, a plurality of loading holes 211 are formed in the inner side of the loading layer 21, a waterproof and breathable film 212 is arranged at the outer opening of the loading hole 211, the loading hole 211 extends to the inside of the polyurethane elastic film 22, the nano-scale anti-rust particles 213 are arranged in the inner side of the waterproof film 23, and the nano-scale anti-rust particles 213 are gas phase corrosion inhibitor mixed layer.

[0027] As a preferred embodiment, the gelatin-based biogel adopted by the first elastic layer 11 has good mechanical properties, tunability, modifiability or healing, has high elastic properties, and can be completely degraded. Its composition is completely extracted from natural and safe food, has good self-adhesion and rapid self-healing ability. This biogel successfully combines the beneficial properties together, is easy to replicate and expand, and can be produced at low cost under external environmental conditions.

[0028] As a preferred embodiment, the second elastic layer 13 adopts a shell-like transparent film based on sustainable biological materials, which constructs a "brick-fiber" shell-like layered structure through two natural components of nanoclay sheets and bacterial cellulose, and improves the elasticity of the film.

[0029] In use, the first elastic layer included in the outer layer and the first elastic layer, and the polyurethane elastic film included in the inner layer, make the composite anti-rust film have good elastic effect, and then when wrapped with the metal object, it can be in contact with the outer wall of the metal object, thereby reducing the space between the metal object, and for large metal equipment, it reduces the occupied space after wrapping, and facilitates the formation of a molecular film layer on the metal surface after the gasification and diffusion of the anti-rust agent, thereby improving the protection effect. The loading layer and the loading hole included in the inner layer make it convenient to composite nano-level anti-rust particles into the inner layer, and the waterproof film and the waterproof breathable film realize the wrapping of the nano-level anti-rust particles, so as to increase the stock of anti-rust agent material, thereby prolonging the gasification time of the anti-rust agent, so that the anti-rust agent molecules exist on the metal outside for a long time, thereby prolonging the anti-rust effect time.

[0030] The degradable composite anti-rust film can effectively solve the problem that the existing degradable composite anti-rust film has a thin gasification molecular layer and metal adsorption surface, and has a short gasification diffusion duration, realizes increasing the thickness of the anti-rust film and the metal adsorption surface on the basis of the existing degradable composite anti-rust film technology, prolongs the anti-rust agent gasification diffusion duration, and thereby enhances the protection effect of the anti-rust film.

Claims

1. A biodegradable composite anti-rust film, comprising: The outer layer (1) and the inner layer (2) are characterized in that: the outer layer (1) and the inner layer (2) are compositely connected, and the outer layer (1) includes a first elastic layer (11) and a second elastic layer (13), and a base film layer (12) is provided between the first elastic layer (11) and the second elastic layer (13). The inner layer (2) includes a loading layer (21), and a loading hole (211) is provided on the inner side of the loading layer (21). Nanoscale anti-rust particles (213) are provided inside the loading layer (21). A polyurethane elastic film (22) is provided on the outer side of the loading layer (21), and a waterproof film (23) is provided on the outer side of the polyurethane elastic film (22).

2. The biodegradable composite anti-rust film according to claim 1, characterized in that, The first elastic layer (11) is made of gelatin-based biogel material, and the second elastic layer (13) is made of shell-like transparent film material.

3. The biodegradable composite anti-rust film according to claim 1, characterized in that, The base film layer (12) is made of polyvinyl alcohol and is compounded with starch, photosensitizer and biodegradable agent.

4. The biodegradable composite anti-rust film according to claim 1, characterized in that, The loading layer (21) is made of starch-based film material, and multiple loading holes (211) are provided on the inner side of the loading layer (21), and a waterproof and breathable membrane (212) is provided on the outer opening of the loading hole (211).

5. The biodegradable composite anti-rust film according to claim 1, characterized in that, The loading hole (211) extends outward into the interior of the polyurethane elastic membrane (22), and the nano-scale anti-rust particles (213) are located on the inner side of the waterproof membrane (23).

6. The biodegradable composite anti-rust film according to claim 1, characterized in that, The nano-scale rust-preventive particles (213) are configured as a vapor phase corrosion inhibitor mixture layer.

7. The biodegradable composite anti-rust film according to claim 1, characterized in that, The outer layer (1) and the inner layer (2) have the same thickness, and release paper is bonded to the inner side of the inner layer (2).

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