Compound heat insulating and fresh keeping protection film

Abstract

The invention discloses a compound heat insulating and fresh keeping protection film. The compound heat insulating and fresh keeping protection film sequentially comprises a first reflection barrier layer, a first woven cloth layer, an EPE composite layer, a second woven cloth layer and a second reflection barrier layer, the first reflection barrier layer, the first woven cloth layer, the EPE composite layer, the second woven cloth layer and the second reflection barrier layer are respectively bonded through a PE layer, the EPE layer comprises 2-10 EPE layers, the EPE layers are fixed through hot piercing to form the EPE composite layer, the spacing of holes in the EPE composite layer is 1-4cm, and the diameter of the holes in the EPE composite layer is 0.5-1cm. The protection film has good barrier and heat insulation performances, has good flexibility, is suitable for packaging trays with various forms, and can be used to package the trays in 1000km; and the protection film has good barrier and heat insulation performances, so chill cars are not needed, and the transportation cost is saved, thereby products are more economical.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a fresh-keeping film, in particular to a composite heat-insulating and fresh-keeping protective film. Background technique [0002] Plastic wrap is a commonly used packaging material in daily life. Food, vegetables and fruits are packaged with plastic wrap to isolate the air from the food and achieve the effect of freshness preservation. There are many types of preservative films commonly used now, including commonly used polyethylene or polyvinyl chloride preservative films, various preservative films modified by formula on the basis of polyethylene, and composite preservative films modified by the structure of preservative films, such as Composite cling film is formed by stacking reinforcement material layer, polymer material layer and active separation material layer at one time. Although this composite cling film has better fresh-keeping effect than traditional cling film, ...

AI Technical Summary

Problems solved by technology

There are many types of preservative films commonly used now, including commonly used polyethylene or polyvinyl chloride preservative films, various preservative films modified by formula on the basis of polyethylene, and composite preservative films modified by the structure of preservative films, such as Composite cling film is composed of reinforcing material layer, polymer material layer and active separation material layer stacked at one time. Although this composite cling film has a better fresh-keeping effect than traditional cling film, the cost of the materials used is higher

[0003] There is also a kind of microporous fresh-keeping film, which produces a large number of tiny pores on the film. Now the mature preparation technology of microporous film includes inorganic filler polymer stretching technology, semi-crystalline polymer stretching technology, chemical foaming technology, phase Separation technology, etc., each technology has its own characteristics and is suitable for different applications, but now it is commonly used as microporous technology or the raw material preparation process is complicated and the cost is high, or the prepared microporous plastic wrap cannot achieve high tensile strength and safety. good effect requirements

[0004] As we all know, for fruits, seafood, meat, vegetables, candy, wine and other foods that need to be transported by cold rubbing, it is often necessary to be equipped with cold chain transportation equipment during transportation. This transportation method is costly, especially for some short-distance transportation

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