CN216359829U

CN216359829U - Composite film for improving curling of film after being heated and frozen

Info

Publication number: CN216359829U
Application number: CN202122911386.XU
Authority: CN
Inventors: 陈永海; 徐磊; 杨军
Original assignee: Shanghai Diyun Packaging Material Co ltd
Current assignee: Shanghai Diyun Packaging Material Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-04-22
Anticipated expiration: 2031-11-25

Abstract

The application discloses improve the film and be heated compound film that curls after being frozen relates to food film technical field, improves the film and be heated and take place the problem of curling easily after being frozen, including the basic unit, the outer fixed surface of basic unit is connected with outer composite bed, composite bed in the internal surface fixed connection of basic unit, outer composite bed includes by interior resistant frozen layer, insulating layer and the wearing layer that bonds outside to in proper order, inner composite bed includes by outer tensile layer, heat-resistant layer and the antiseized layer that bonds in proper order to interior. This application is through the setting of insulating layer, can strengthen the thermal-insulated effect of film, through the setting on resistant frozen layer, can strengthen the resistant frozen performance of film, through the setting on heat-resistant layer, can strengthen the heat resistance of film, make the film difficult emergence after being heated and being frozen curl, improve the result of use of film, through the setting on wearing layer and tensile layer, can strengthen the damage resistance of film, reduce the film damage, prolong the life of film.

Description

Composite film for improving curling of film after being heated and frozen

Technical Field

The application relates to the technical field of food films, in particular to a composite film for improving curling of a film after the film is heated and frozen.

Background

The food packaging film is a high polymer material which is used for wrapping the surface of food and is mainly used for isolating and decomposing the entering of microbe bacteria and external pollutants and preventing and prolonging the deterioration of the food.

In the process of realizing the above, the inventor finds that at least the following problems exist in the technology: the existing food film is easy to curl after being heated and frozen, and the using effect is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the film is easy to curl after being heated and frozen, the application provides a composite film which is improved and curled after being heated and frozen.

The application provides improve the compound film that the film is heated and is curled after being frozen, adopts following technical scheme:

the composite film for improving the curling of the film after being heated and frozen comprises a base layer, wherein an outer composite layer is fixedly connected to the outer surface of the base layer, and an inner composite layer is fixedly connected to the inner surface of the base layer;

the outer composite layer comprises a freezing-resistant layer, a heat-insulating layer and a wear-resistant layer which are sequentially bonded from inside to outside;

the inner composite layer comprises a tensile layer, a heat-resistant layer and an anti-sticking layer which are sequentially bonded from outside to inside.

Through adopting above-mentioned technical scheme, through the wearing resistance of wearing layer reinforcing film, reduce the wearing and tearing of film, through the tensile strength of tensile layer reinforcing film, it is damaged to reduce the film, prolongs the life of film, through the thermal-insulated effect of insulating layer reinforcing film, through the resistant performance of freezing of resistant layer reinforcing film, through the heat resistance of heat-resistant layer reinforcing film, makes the film be difficult for taking place to curl after being heated and catching a cold.

Optionally, the base layer is a PE film.

By adopting the technical scheme, the PE film, namely the polyethylene film, is a film produced by using PE particles, and has the advantages of moisture resistance and small moisture permeability.

Optionally, the freeze-resistant layer is made of polytetrafluoroethylene.

By adopting the technical scheme, the polytetrafluoroethylene has the characteristics of acid and alkali resistance, high temperature resistance and low temperature resistance, and the heat and freeze resistance of the film can be enhanced.

Optionally, the thermal insulation layer is made of silica aerogel.

Through adopting above-mentioned technical scheme, silica aerogel has the heat-proof quality, can strengthen the thermal-insulated effect of film.

Optionally, the wear layer is made of polypropylene fibers.

By adopting the technical scheme, the polypropylene fiber has the characteristic of high wear resistance, and the wear resistance of the film can be enhanced.

Optionally, the tensile layer is made of polyurethane fibers.

By adopting the technical scheme, the polyurethane fiber has better elasticity and tensile property, the tensile property of the film can be enhanced, and the breakage of the film is reduced.

Optionally, the heat-resistant layer is a polyimide film.

By adopting the technical scheme, the polyimide film has the characteristic of high temperature resistance, and the heat resistance of the film can be enhanced.

Optionally, the anti-sticking layer is a PET film.

By adopting the technical scheme, the PET film has good air tightness, the barrier property of the film can be enhanced, and the adhesion between the films can be reduced.

In summary, the present application includes at least one of the following benefits:

1. according to the film, the heat insulation effect of the film can be enhanced through the arrangement of the heat insulation layer, the freezing resistance of the film can be enhanced through the arrangement of the freezing resistance layer, the heat resistance of the film can be enhanced through the arrangement of the heat resistance layer, the film is not easy to curl after being heated and frozen, and the use effect of the film is improved;

2. this application can strengthen the wear resistance of film through the setting of wearing layer, reduces the wearing and tearing of film, through the setting of tensile layer, can strengthen the tensile property of film, reduces the film damage, prolongs the life of film.

Drawings

FIG. 1 is a schematic view of the overall structure of the present application;

FIG. 2 is a schematic structural view of an external composite layer of the present application;

FIG. 3 is a schematic structural view of a composite layer in the present application.

Description of reference numerals: 1. a base layer; 2. an outer composite layer; 201. a freeze-resistant layer; 202. a thermal insulation layer; 203. a wear layer; 3. an inner composite layer; 301. a tensile layer; 302. a heat-resistant layer; 303. and (4) an anti-sticking layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

Referring to fig. 1, the composite film for improving curling of the film after being heated and frozen comprises a base layer 1, wherein the base layer 1 is a PE film, namely a polyethylene film, and the PE film is produced by using PE particles, and has moisture resistance and small moisture permeability, an outer composite layer 2 is fixedly connected to the outer surface of the base layer 1, and an inner composite layer 3 is fixedly connected to the inner surface of the base layer 1.

Referring to fig. 1 and 2, the outer composite layer 2 includes a freezing-resistant layer 201, a heat-insulating layer 202 and a wear-resistant layer 203 which are sequentially bonded from inside to outside, the freezing-resistant layer 201 is arranged on one side of the base layer 1 far away from the inner composite layer 3, the freezing-resistant layer 201 is made of polytetrafluoroethylene, and the polytetrafluoroethylene has the characteristics of acid and alkali resistance, high temperature resistance and low temperature resistance and can enhance the heat and freezing resistance of the film. Insulating layer 202 sets up and keeps away from basic unit 1 one side at resistant layer 201 that freezes, and insulating layer 202 is made by silica aerogel, and silica aerogel has the heat-proof quality, can strengthen the thermal-insulated effect of film. The wearing layer 203 sets up and keeps away from resistant layer 201 one side at insulating layer 202, and wearing layer 203 is made by polypropylene fiber, and polypropylene fiber has high wear-resisting characteristic, can strengthen the wear resistance of film.

Referring to fig. 1 and 3, the inner composite layer 3 includes a tensile layer 301, a heat-resistant layer 302 and an anti-sticking layer 303 which are sequentially bonded from outside to inside, the tensile layer 301 is disposed on one side of the base layer 1 far away from the outer composite layer 2, the tensile layer 301 is made of polyurethane fibers, and the polyurethane fibers have good elasticity and tensile property, so that the tensile property of the film can be enhanced, and the breakage of the film is reduced. The heat-resistant layer 302 sets up and keeps away from basic unit 1 one side at tensile layer 301, and heat-resistant layer 302 is the polyimide film, and the polyimide film has high temperature resistance's characteristics, can strengthen the heat resistance of film. Antiseized layer 303 sets up and keeps away from tensile layer 301 one side at heat-resistant layer 302, and antiseized layer 303 is the PET film, and the PET film has good gas tightness, can strengthen the barrier property of film, can reduce the adhesion between the film simultaneously.

The implementation principle of the application is as follows: when the film is used, the wear-resisting property of the film is enhanced through the wear-resisting layer 203, the abrasion of the film is reduced, the tensile property of the film is enhanced through the tensile layer 301, the damage of the film is reduced, the service life of the film is prolonged, the heat insulation effect of the film is enhanced through the heat insulation layer 202, the freezing resistance of the film is enhanced through the freezing-resisting layer 201, the heat resistance of the film is enhanced through the heat-resisting layer 302, and the film is not easy to curl after being heated and frozen.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. Improve the compound film that the film is heated and is curled after freezing, including basic unit (1), its characterized in that: the outer surface of the base layer (1) is fixedly connected with an outer composite layer (2), and the inner surface of the base layer (1) is fixedly connected with an inner composite layer (3);

the outer composite layer (2) comprises a freezing-resistant layer (201), a heat-insulating layer (202) and a wear-resistant layer (203) which are sequentially bonded from inside to outside;

the inner composite layer (3) comprises a tensile layer (301), a heat-resistant layer (302) and an anti-sticking layer (303) which are sequentially bonded from outside to inside.

2. The composite film for improving curling of the film after being frozen by heat according to claim 1, wherein: the base layer (1) is a PE film.

3. The composite film for improving curling of the film after being frozen by heat according to claim 1, wherein: the anti-freezing layer (201) is made of polytetrafluoroethylene.

4. The composite film for improving curling of the film after being frozen by heat according to claim 3, wherein: the insulation layer (202) is made of silica aerogel.

5. The composite film for improving curling of the film after being frozen by heat according to claim 4, wherein: the wear resistant layer (203) is made of polypropylene fibers.

6. The composite film for improving curling of the film after being frozen by heat according to claim 1, wherein: the tensile layer (301) is made of polyurethane fibers.

7. The composite film for improving curling of the film after being frozen by heat according to claim 6, wherein: the heat-resistant layer (302) is a polyimide film.

8. The composite film for improving curling of the film after being frozen by heat according to claim 7, wherein: the anti-sticking layer (303) is a PET film.