High-performance PE (polyethylene) preservative film for automatic packaging machine

Abstract

The invention discloses a high-performance PE (polyethylene) preservative film for an automatic packaging machine. The preservative film comprises a core layer, at least two middle layers and at least one surface layer, wherein by mass percent, the core layer is formed by mixing 80%-90% of LLDPE (linear low density polyethylene) and mLLDPE (metallocene linear low density polyethylene), 5%-10% of POE (polyolefin elastomer), 3%-5% of an antifogging agent, 1%-3% of stearic acid and 3%-5% of cellulose; each middle layer is formed by mixing 80%-90% of LLDPE and mLLDPE, 5%-10% of POE, 3%-5% of an antifogging agent and 3%-5% of cellulose; each surface layer is formed by mixing 85%-90% of LLDPE and mLLDPE, 1%-3% of POE, 1%-3% of an antifogging agent, 3%-5% of conductive mica powder, 1%-3% of ethyl distearamide and 3%-5% of cellulose. The preservative film is easily smoothly cut off by a cutter on the automatic preservative film packaging machine, and is excellent in flexibility, contractility, viscosity and transparency, moderate in water vapor penetration rate and excellent in oxygen barrier rate; the preservative effect can be greatly improved.

Description

technical field [0001] The invention relates to a fresh-keeping film, in particular to a high-performance PE fresh-keeping film used in an automatic packaging machine. Background technique [0002] Fruit and vegetable supermarkets, distribution centers, food processing plants, meat processing companies, etc. often need to use automatic plastic wrap packaging machines to pack various foods with plastic wrap in trays for storage, display and sales, but currently used for automatic fresh-keeping The cling film on the film packaging machine is usually commercially available PE cling film, which has a single film structure, mostly a single-layer structure, or although it is a multi-layer structure, due to the limitation of the PE cling film formula, the flexibility of the PE cling film Poor performance, shrinkage and adhesion, when used on automatic plastic wrap packaging machines, it will cause problems such as the plastic wrap cannot be cut smoothly by the cutter on the automat...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the poor flexibility, retractability, adhesiveness, transparency and surface gloss of PE cling film in the prior art, which causes the cling film to be unable to be smoothly cut off by the cutter on the automatic cling film packaging machine, and the film The body is easy to break and the surface of the film is not smooth after packaging, and it is easy to wrinkle after packaging on the food. It provides a simple structure, excellent flexibility, retractability, adhesiveness and transparency for automatic packaging. High performance PE cling film for machine

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