Bio-based degradable PLA film with good wear resistance

Abstract

The utility model discloses a bio-based degradable PLA (polylactic acid) film with good wear resistance, which comprises a PLA film body, the PLA film body consists of a polylactic acid base film and barrier layers, the barrier layers are respectively arranged on the upper side and the lower side of the polylactic acid base film, reinforcing layers are arranged between the polylactic acid base film and the barrier layers, and the reinforcing layers are arranged on the polylactic acid base film. The strength of the whole structure of the PLA film body can be improved through the reinforcing layer of the net structure, the blocking layers made of the graphene materials can effectively improve the air isolation performance of the PLA film body, the abrasion-proof layer distributed on the outermost side of the PLA film body can effectively improve the air isolation performance of the PLA film body, and therefore the abrasion-proof performance of the PLA film body is improved, and the abrasion-proof performance of the PLA film body is improved. According to the PLA film, the barrier layer can be effectively protected, the barrier layer is prevented from being frosted in the use process of the PLA film body, the polylactic acid base film and the anti-abrasion layer are both made of polylactic acid materials, the PLA film body can be degraded, and the PLA film is more environmentally friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of PLA films, in particular to a bio-based degradable PLA film with good wear resistance. Background Art

[0002] Plastics are widely used in the packaging field due to their advantages such as light weight, good sealing, good toughness, low price and easy availability. At present, plastic packaging materials account for more than 30% of the total amount of various packaging materials. In my country's food packaging materials, the application of plastics has exceeded 50% of the total amount of packaging materials, ranking first among various packaging materials. However, traditional packaging plastics are made from petrochemical products through chemical reactions and are treated as non-degradable waste at the end of their product life cycle. With the increase of people's environmental awareness and strong concern about food safety issues, people are in urgent need of degradable green packaging plastics. At present, PLA (polylactic acid) is recognized as the most competitive degradable and environmentally friendly polymer, and is expected to become a substitute for petrochemical plastics in the packaging field.

[0003] The existing PLA film lacks anti-wear measures. After long-term use, the barrier layer attached to the outer layer of the PLA film is easily worn, resulting in poor insulation effect of the PLA film. At the same time, the existing PLA film lacks reinforcement measures, and it is particularly easy to deform or even break under external force. Therefore, a bio-based degradable PLA film with good wear resistance is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a bio-based degradable PLA film with good wear resistance to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bio-based degradable PLA film with good wear resistance, comprising a PLA film body, wherein the PLA film body is composed of a polylactic acid base film and a barrier layer, barrier layers are respectively arranged on the upper and lower sides of the polylactic acid base film, a reinforcement layer is arranged between the polylactic acid base film and the barrier layer, and anti-wear layers are arranged on the end surfaces of the two barrier layers that are away from each other.

[0006] As a further preferred embodiment of the present technical solution, the thickness of the polylactic acid-based film is 8 μm-200 μm.

[0007] As a further preferred embodiment of the present technical solution, the reinforcement layer is a mesh structure.

[0008] As a further preferred embodiment of the present technical solution, the thickness of the reinforcement layer is 1 μm-200 μm.

[0009] As a further preferred embodiment of the present technical solution, the barrier layer is made of graphene material.

[0010] As a further preferred embodiment of the present technical solution, the thickness of the barrier layer is 1 μm-200 μm.

[0011] As a further preferred embodiment of the present technical solution, the anti-wear layer is made of polylactic acid material.

[0012] As a further preferred embodiment of the present technical solution, the thickness of the anti-wear layer is 8 μm-200 μm.

[0013] The utility model provides a bio-based degradable PLA film with good wear resistance, which has the following

[0014] Beneficial effects:

[0015] The utility model can improve the strength of the overall structure of the PLA film body through the reinforcement layer of the mesh structure, the barrier layer made of graphene material can effectively improve the air isolation performance of the PLA film body, and the anti-wear layer distributed on the outermost side of the PLA film body can effectively protect the barrier layer to prevent the barrier layer from being frosted during the use of the PLA film body. The polylactic acid base film and the anti-wear layer are both made of polylactic acid material, so that the PLA film body can be degraded and is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a schematic diagram of the disassembly of the overall structure of the utility model;

[0018] Figure 3 It is a further disassembly schematic diagram of the overall structure of the utility model;

[0019] Figure 4 For this utility model Figure 3 The structural diagram of A in the figure;

[0020] In the figure: 1. PLA film body; 2. Polylactic acid base film; 3. Reinforcement layer; 4. Barrier layer; 5. Anti-wear layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] The utility model provides a technical solution: Figures 1 to 4As shown, in this embodiment, a bio-based degradable PLA film with good wear resistance includes a PLA film body 1, which is composed of a polylactic acid base film 2 and a barrier layer 4. The barrier layers 4 are respectively arranged on the upper and lower sides of the polylactic acid base film 2, and a reinforcement layer 3 is arranged between the polylactic acid base film 2 and the barrier layer 4. The end surfaces of the two barrier layers 4 away from each other are both provided with anti-wear layers 5.

[0023] The thickness of the polylactic acid base film 2 is 8 μm-200 μm.

[0024] The reinforcing layer 3 is a mesh structure, which can improve the strength of the overall structure of the PLA film body 1.

[0025] The thickness of the reinforcement layer 3 is 1 μm-200 μm.

[0026] The barrier layer 4 is made of graphene material and is disposed on the surface of the reinforcement layer 3 by spraying, which can effectively improve the air isolation capability of the PLA film body 1 .

[0027] The thickness of the barrier layer 4 is 1 μm-200 μm.

[0028] Among them, the anti-wear layer 5 is made of polylactic acid material, which is distributed on the outermost side of the PLA film body 1. It can effectively protect the barrier layer 4 and prevent the barrier layer 4 from being frosted during the use of the PLA film body 1. Polylactic acid is a biodegradable material, which can ensure that the anti-wear layer 5 can be degraded, making the PLA film body 1 more environmentally friendly.

[0029] The thickness of the anti-wear layer 5 is 8 μm-200 μm.

[0030] The utility model provides a bio-based degradable PLA film with good wear resistance, and the specific working principle is as follows:

[0031] The reinforcing layer 3 with a mesh structure can improve the strength of the overall structure of the PLA film body 1. The barrier layer 4 made of graphene material can effectively improve the air isolation performance of the PLA film body 1. The anti-wear layer 5 distributed on the outermost side of the PLA film body 1 can effectively protect the barrier layer 4 to prevent the barrier layer 4 from being frosted during the use of the PLA film body 1. The polylactic acid base film 2 and the anti-wear layer 5 are both made of polylactic acid material, so that the PLA film body 1 can be degraded and is more environmentally friendly.

[0032] 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 bio-based degradable PLA film with good wear resistance, comprising a PLA film body (1), characterized in that: The PLA film body (1) is composed of a polylactic acid base film (2) and a barrier layer (4); the barrier layers (4) are respectively arranged on the upper and lower sides of the polylactic acid base film (2); a reinforcement layer (3) is arranged between the polylactic acid base film (2) and the barrier layer (4); and the end surfaces of the two barrier layers (4) that are away from each other are both provided with an anti-wear layer (5).

2. The bio-based degradable PLA film with good wear resistance according to claim 1, characterized in that: The thickness of the polylactic acid-based film (2) is 8 μm-200 μm.

3. The bio-based degradable PLA film with good wear resistance according to claim 1, characterized in that: The reinforcement layer (3) is a mesh structure.

4. The bio-based degradable PLA film with good wear resistance according to claim 1, characterized in that: The thickness of the reinforcement layer (3) is 1 μm-200 μm.

5. The bio-based degradable PLA film with good wear resistance according to claim 1, characterized in that: The barrier layer (4) is made of graphene material.

6. The bio-based degradable PLA film with good wear resistance according to claim 1, characterized in that: The thickness of the barrier layer (4) is 1 μm-200 μm.

7. The bio-based degradable PLA film with good wear resistance according to claim 1, characterized in that: The anti-wear layer (5) is made of polylactic acid material.

8. The bio-based degradable PLA film with good wear resistance according to claim 1, characterized in that: The thickness of the anti-wear layer (5) is 8 μm-200 μm.

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