PE (Poly Ethylene) preservative film and preparation method thereof

Abstract

The invention provides a PE (Poly Ethylene) preservative film, comprising the following components in parts by weight: 100-300 parts of LLDPE (Linear Low Density Poly Ethylene), 20-30 parts of polyisobutene, 10-25 parts of TPEE (Thermoplastic Polyether Ester Elastomer), 5-15 parts of ultra-low density polyethylene, 2-8 parts of talcum powder, 1-3 parts of silicon dioxide, 1-4 parts of glycerol, 2-5 parts of sorbitol, 3-6 parts of Span40, 0.5-1.6 parts of trimethylolpropane and 200-500 parts of water. A preparation process of the PE preservative film provided by the invention comprises the following steps: firstly, dispersing the LLDPE, the polyisobutene, the TPEE and the ultra-low density polyethylene in water, and then adding the talcum powder, the silicon dioxide, the glycerol, the sorbitol, the Span40 and the trimethylolpropane, and heating until the temperature reaches 95 DEG C; after stirring evenly, cooling until the temperature is in the range from 50 DEG C to 70 DEG C to obtain a solution for curtain coating to form a film; applying the obtained solution to a steel strip on a curtain coating production line through a die head in a curtain coating way, and then passing the steel strip through a drying tunnel at a temperature in the range from 130 to 180 DEG C for drying. The PE preservative film provided by the invention is more convenient to stretch and easier to operate compared with a PVC (Polyvinyl Chloride) preservative film; the preservative film is lower in moisture permeability and more advantageous for retaining moisture.

Description

technical field [0001] The invention belongs to the technical field of plastic packaging, and in particular relates to a PE fresh-keeping film and a preparation method thereof. Background technique [0002] Packaging fresh and cooked food with PVC cling film has advantages such as softness and good anti-fog effect, but because PVC cling film contains a plasticizer - dioctyl adipate (DEHA), the WWF lists this substance as For substances that may damage the human endocrine system, many countries such as Europe, Japan, and South Korea have already banned DEHA-containing cling film, and my country has also banned PVC cling film. [0003] Because the polyethylene raw material (PE) is safe and non-toxic, the PE film made of it is water-permeable, moderately breathable, and suitable for food preservation. Therefore, ordinary PE cling film is mainly used to replace PVC cling film on the market at present, but ordinary PE cling film has the following disadvantages: Transparency Low, ...

AI Technical Summary

Problems solved by technology

[0003] Because the polyethylene raw material (PE) is safe and non-toxic, the PE film made of it is water-permeable, moderately breathable, and suitable for food preservation. Therefore, ordinary PE cling film is mainly used to replace PVC cling film on the market, but ordinary PE cling film has the following disadvantages: Transparency Low, poor anti-fog effect, can't see through the package content well; poor flexibility, difficult to stretch; poor shrinkage, poor packaging; poor adhesion on the bottom of the shallow plate, easy to disperse

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