Oil-proof PE preservative film

Abstract

The invention discloses an oil-proof PE preservative film. The oil-proof PE preservative film comprises an inner layer, a middle layer and an outer layer which are sequentially arranged in a stacked mode, wherein the thickness ratio of the inner layer to the middle layer to the outer layer is 1 + / - 0.4 to 1 + / - 0.4 to 1 + / - 0.4, the inner layer is prepared from low-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene and metallocene linear low-density polyethylene according to the weight ratio of 5 + / - 0.4 to 2 + / - 0.3 to 1 + / - 0.2 to 1 + / - 0.2 to 1 + / - 0.2, the middle layer is prepared from low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene and metallocene linear low-density polyethylene according to the weight ratio of 10 + / - 0.2 to 10 + / - 0.2 to 10 + / - 0.2 to 2 + / - 0.1 to 2 + / - 0.1, the outer layer is prepared from low-density polyethylene, high-density polyethylene, linear low-density polyethylene according to the weight ratio of 5 + / - 0.4 to 2 + / - 0.3 to 1 + / - 0.2, and the weight ratio of the low-density polyethylene in the inner layer, the low-density polyethylene in the middle layer to the low-density polyethylene in the outer layer is 2 to 1 to 2. The oil-proof PE preservative film has good oil penetration prevention and has aromatic smell.

Description

technical field [0001] The invention belongs to the technical field of PE film, and in particular relates to an oil-proof PE fresh-keeping film. Background technique [0002] PE, the full name of which is Polyethylene, is the simplest polymer organic compound and the most widely used polymer material in the world today. PE protective film is based on special polyethylene plastic film, which can be divided into high-density polyethylene protective film, medium-density polyethylene protective film and low-density polyethylene protective film according to different densities. The biggest advantage of PE protective film is that the protected product is not polluted, corroded, scratched during production, processing, transportation, storage and use, and protects the original smooth and shiny surface, thereby improving product quality and market competitiveness . [0003] However, the traditional PE protective film has the following defects: [0004] (1) Poor oil-proof permeabi...

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Problems solved by technology

[0006] Based on this, in view of the above problems, the present invention proposes an oil-proof PE fresh-keeping film, which modifies the film through polypropylene, and makes the film have better heat-sealing performance through metallocene linear low-density polyethylene, so that after modification The molecular chains of the PE film form a three-dimensional configuration to increase the molecular density, so as to prevent the penetration of oil molecules, and avoid the situation that the oil cannot be effectively separated when used as a fresh-keeping product and cause mutual contamination of food; at the same time, the aromatic substance myrcene is added to make The film has an aromatic smell, and myrcene can be combined with low-density polyethylene and linear low-density polyethylene, and will not affect the heat-sealing strength and tensile strength at break of the PE film

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