CN-224211589-U - Food packaging film capable of changing color according to temperature

CN224211589UCN 224211589 UCN224211589 UCN 224211589UCN-224211589-U

Abstract

The utility model discloses a food packaging film capable of changing color according to temperature, which relates to the technical field of food packaging and comprises a food packaging film, wherein the food packaging film comprises a food contact layer, the food contact layer is made of Polyethylene (PE), a reinforcing layer is fixedly connected to the surface of the food contact layer, the reinforcing layer is made of ethylene-vinyl acetate copolymer, a detection layer is arranged on one side, far away from the food contact layer, of the reinforcing layer, the detection layer is made of color-changing ink, a wear-resisting layer is fixedly connected to one side, far away from the detection layer, of the isolation layer, and is made of a polyamide film.

Inventors

HUANG CHUNMING
HUANG LUTING
FANG JINGJUN

Assignees

慈溪市新华包装有限公司

Dates

Publication Date: 20260508
Application Date: 20250605

Claims (6)

1. The food packaging film capable of changing color according to temperature comprises a food packaging film (1) and is characterized in that the food packaging film (1) comprises a food contact layer (101), the food contact layer (101) is made of polyethylene PE, a reinforcing layer (102) is fixedly connected to the surface of the food contact layer (101), the reinforcing layer (102) is made of ethylene-vinyl acetate copolymer, a detection layer (103) is arranged on one side, far away from the food contact layer (101), of the reinforcing layer (102), and the detection layer (103) is made of color-changing ink.
2. The food packaging film capable of changing color according to temperature as claimed in claim 1, wherein the side of the detection layer (103) far away from the reinforcing layer (102) is fixedly connected with an isolation layer (104), and the isolation layer (104) is made of an ultra-high molecular weight polyethylene film.
3. The food packaging film capable of changing color according to temperature as claimed in claim 2, wherein the side of the isolation layer (104) far away from the detection layer (103) is fixedly connected with a wear-resistant layer (105), and the wear-resistant layer (105) is a polyamide film.
4. A food packaging film capable of changing color according to temperature as claimed in claim 3, wherein the surface of the food packaging film (1) is fixedly connected with a protective film (4), and the protective film (4) is made of transparent materials.
5. The food packaging film capable of changing color according to temperature as claimed in claim 4, wherein the sealing strips (3) are fixedly connected to two sides of the surface of the food packaging film (1), and the sealing strips (3) are divided into two parts.
6. The food packaging film capable of changing color according to temperature as claimed in claim 5, wherein the surface of the food packaging film (1) is provided with a convenient tearing opening (2), and the convenient tearing opening (2) is in a circular arc shape.

Description

Food packaging film capable of changing color according to temperature Technical Field The utility model relates to the technical field of food packaging, in particular to a food packaging film capable of changing color according to temperature. Background The food packaging film is a packaging design, is convenient for preserving and storing food in life, and therefore produces a product packaging film, the food packaging film is a film which is directly contacted with the food, the food packaging film is used for wrapping the surface of the food, is mainly used for isolating and decomposing microbial bacteria and entering of external pollutants, prevents and prolongs high polymer materials of food deterioration, and also has the function of ensuring the fresh and healthy food, so that the food can be stored for a longer time. The existing food needs to be transported by a cold chain in the transportation process, and then the food needs to be frozen and refrigerated in the transportation process, however, the temperature display positions of most of the existing transportation devices are generally in a driving position or a carriage, and when the transportation temperature of the food is confirmed, the food needs to enter the carriage or enter the driving chamber again to judge, so that the food can be more troublesome, and therefore, the food packaging film capable of changing color according to the temperature is provided to solve the problems. Disclosure of utility model The utility model aims to at least solve one of the technical problems in the prior art, and provides a food packaging film capable of changing color according to temperature, which can solve the problems in the background art. In order to achieve the above purpose, the food packaging film capable of changing color according to temperature comprises a food packaging film, wherein the food packaging film comprises a food contact layer, the food contact layer is made of polyethylene PE, the surface of the food contact layer is fixedly connected with a reinforcing layer, the reinforcing layer is made of ethylene-vinyl acetate copolymer, one side, far away from the food contact layer, of the reinforcing layer is provided with a detection layer, and the detection layer is made of color-changing ink. Preferably, the detection layer is fixedly connected with an isolation layer on one side far away from the reinforcing layer, and the isolation layer is made of an ultra-high molecular weight polyethylene film. Preferably, one side of the isolation layer far away from the detection layer is fixedly connected with a wear-resistant layer, and the wear-resistant layer is a polyamide film. Preferably, the surface of the food packaging film is fixedly connected with a protective film, and the protective film is made of transparent materials. Preferably, sealing strips are fixedly connected to two sides of the surface of the food packaging film, and the sealing strips are divided into two parts. Preferably, the surface of the food packaging film is provided with a convenient tearing opening, and the convenient tearing opening is in a circular arc shape. Compared with the prior art, the utility model has the beneficial effects that: (1) This can be according to food packaging film of temperature discolouring, through the setting of testing layer, and because the plastic film that sets up is transparent material, and then the staff of being convenient for can directly see the colour of testing layer to can carry out approximate analysis to the temperature of depositing of food, need not to get into the carriage or get into the driver's cabin again in, made things convenient for people to the judgement of food transportation temperature. (2) This can be according to food packaging film of temperature discolouring, through the setting of food contact layer, and under the circumstances that the food contact layer was polyethylene PE material, can directly cover the parcel to food to isolate the food and the external world of storing, thereby reduced the circumstances that the food decayed in the transportation, and polyethylene PE material low temperature resistance is splendid, the security is high, nontoxic, make the food contact layer can protect the food of storing well, further improved the result of use of this packaging film. (3) This can be according to food packaging film of temperature discolouring, through the setting of wearing layer, under the wearing layer is polyamide film's material, utilize polyamide film to have the toughness of high strength, have good characteristics of preventing the puncture effect, thereby cover the protection to the article of transportation, and reduced the circumstances that damage appears in the packaging film in the transportation, thereby reduced in the transportation, the circumstances that food goes bad because of the film damage appears, thereby reduced because of the packing damage, make the cost that food