High-barrier PE film
By setting up multiple layers of barrier materials and thermal insulation layers in the PE film, combined with hot pressing and protective coating, the problem of single barrier performance of existing PE films is solved, and a variety of barrier functions and stability are achieved, suitable for a variety of applications. environment.
Patent Information
- Application Number
- CN202421079137.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The existing high-barrier PE films only have thermal insulation function, and their barrier performance is too single, so they cannot provide multiple effective barrier functions for different usage environments.
Two symmetrical PE base layers are adopted, with a first and a second barrier layer between them. The first barrier layer is composed of a water barrier layer and a gas barrier layer. The second barrier layer is composed of a bonded thermal insulation layer, combined with hot pressing or The adhesive method is closely combined, and heat-insulating bubbles are provided between the insulation layers and protective coatings are added to improve stability.
The PE film has adaptability to multiple barrier functions, can be used in various environments, and protects internal components through protective coatings to maintain the stability of barrier properties and thermal insulation effect.
Smart Images
Figure CN222201933U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PE films, in particular to a high-barrier PE film. Background Art
[0002] PE film, also known as polyethylene film, is a film produced from PE particles. It has the characteristics of moisture resistance and low moisture permeability. It is mainly used in food packaging, medical packaging and other fields.
[0003] After searching, the patent number CN219988688U discloses a high barrier PE film. The gaps between the polyimide particles formed by the PE film cast molding process are reduced, thereby improving its own high barrier and thermal insulation properties. The isostatic pressing process can make the connection between the thermal insulation layer and the PE film base layer closer. In addition, through the dual processes of cast molding and isostatic pressing, the overall molding density of the PE film is increased, thereby improving its high barrier and thermal insulation properties.
[0004] However, the above-mentioned PE film only has a heat insulation function, and its barrier performance is too single, and it cannot have multiple effective barrier functions for different use environments. Utility Model Content
[0005] In view of the above problems existing in the existing high barrier PE film, the present utility model is proposed.
[0006] Therefore, the purpose of the utility model is to provide a high barrier PE film, which solves the problem that the existing PE film only has a heat insulation function, its barrier performance is too single, and it cannot have multiple effective barrier functions for different use environments.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] A high barrier PE film, comprising two symmetrically arranged PE base layers, a first barrier layer and a second barrier layer are arranged between the two PE base layers, the number of the first barrier layers is , and the first barrier layers are arranged on both sides of the second barrier layer;
[0009] The first barrier layer is composed of a water barrier layer and a gas barrier layer, and the second barrier layer is composed of heat insulation layers bonded on both sides.
[0010] Preferably, the water barrier layer and the gas barrier layer are respectively an aluminum oxide nanofilm and a silicon dioxide nanofilm, and the water barrier layer and the gas barrier layer are connected by chemical bonds, which can effectively prevent the penetration of gas and water molecules, while ensuring the stability and durability of the first barrier layer.
[0011] Preferably, the two heat insulation layers are both made of polyimide, which has an effective heat insulation effect.
[0012] Preferably, the two PE base layers are coated with a protective coating on the side away from each other, and the protective coating is a polyurethane coating. The thickness of each layer of the protective coating is between 5 and 15 microns. The protective coating has excellent physical properties and can effectively protect the surface of the film from external damage, thereby preventing the internal components of the PE film from being affected, so that the PE film has stable barrier properties.
[0013] Furthermore, a plurality of insulating bubbles are provided between the two insulating layers, which can serve as insulating layers and effectively reduce heat transfer.
[0014] Preferably, the PE base layer, the first barrier layer and the second barrier layer are tightly combined by heat pressing or gluing, thereby ensuring the structural stability and overall performance of the entire film.
[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:
[0016] 1. The utility model, through the combination of multiple layers of different barrier materials including the PE base layer, the first barrier layer, the second barrier layer, the water barrier layer, the gas barrier layer and the heat insulation layer, can make the PE film have multiple barrier functions and be suitable for various working environments.
[0017] 2. The utility model effectively protects the internal components of the PE film by providing a PE base layer and a protective coating, and tries to avoid the internal components of the PE film from being damaged and failing to have good barrier properties. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0020] Figure 2 This is an internal cross-sectional view of the second thermal insulation layer of the present invention.
[0021] Description of reference numerals:
[0022] 1. PE base layer; 2. Water barrier layer; 3. Gas barrier layer; 4. Thermal insulation layer; 5. Protective coating; 6. Thermal insulation bubbles. DETAILED DESCRIPTION
[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0024] The utility model embodiment discloses a high-barrier PE film.
[0025] The utility model provides Figure 1-2 A high barrier PE film shown includes two symmetrically arranged PE base layers 1, a first barrier layer and a second barrier layer are arranged between the two PE base layers 1, the number of the first barrier layers is 2, and they are arranged on both sides of the second barrier layer, and the PE base layer 1, the first barrier layer and the second barrier layer are tightly combined by heat pressing or gluing;
[0026] The first barrier layer is composed of a water barrier layer 2 and a gas barrier layer 3, which are respectively an aluminum oxide nanofilm and a silicon dioxide nanofilm, and are connected by chemical bonds. The second barrier layer is composed of thermal insulation layers 4 bonded on both sides, and the two thermal insulation layers 4 are made of polyimide, and a plurality of thermal insulation bubbles 6 are arranged between the two thermal insulation layers 4.
[0027] During the preparation of the PE film, the cooperation of the water-blocking layer 2 and the gas-barrier layer 3 symmetrically arranged on both sides can effectively prevent the penetration of gas and water molecules, so that the film has good waterproof and air-proof properties. At the same time, the setting of the heat-insulating layer 4 can make the PE film have good heat-insulating properties. In combination with the water-blocking layer 2 and the gas-barrier layer 3, the PE film has multiple barrier effects and is convenient for use in various environments. At the same time, the setting of the bubble structure inside the two heat-insulating layers 4 can effectively reduce the transfer of heat, further improving the heat-insulating effect of the film.
[0028] In order to effectively protect the PE film and ensure that the PE film as a whole has good barrier properties, such as Figure 1 As shown, the two PE base layers 1 are coated with a protective coating 5 on the side away from each other. The protective coating 5 is a polyurethane coating, and the thickness of each layer of the protective coating 5 is between 5 and 15 microns.
[0029] By providing the protective coating 5, the surface of the film can be effectively protected from external damage, so that the internal components of the PE film are not worn, thereby keeping the barrier effect of the PE film stable.
[0030] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A high barrier PE film, comprising two symmetrically arranged PE base layers (1), characterized in that: A first barrier layer and a second barrier layer are provided between the two PE base layers (1), the number of the first barrier layers is 2 and they are provided on both sides of the second barrier layer; The first barrier layer is composed of a water barrier layer (2) and a gas barrier layer (3), and the second barrier layer is composed of heat insulation layers (4) bonded on both sides.
2. The high barrier PE film according to claim 1, characterized in that: The water barrier layer (2) and the gas barrier layer (3) are respectively an aluminum oxide nanofilm and a silicon dioxide nanofilm, and the water barrier layer (2) and the gas barrier layer (3) are connected by chemical bonds.
3. The high barrier PE film according to claim 1, characterized in that: The two heat insulation layers (4) are both made of polyimide.
4. The high barrier PE film according to claim 1, characterized in that: The two PE base layers (1) are both coated with a protective coating (5) on the side away from each other. The protective coating (5) is a polyurethane coating. The thickness of each layer of the protective coating (5) is between 5 and 15 micrometers.
5. The high barrier PE film according to claim 1, characterized in that: A plurality of heat-insulating bubbles (6) are provided between the two heat-insulating layers (4).
6. The high barrier PE film according to claim 1, characterized in that: The PE base layer (1), the first barrier layer and the second barrier layer are tightly bonded together by means of heat pressing or gluing.