PE blown film for liquid packaging and preparation method thereof

Abstract

The invention discloses a PE blown film for liquid packaging. The PE blown film is mainly prepared from the following raw materials in parts by weight: 50-80 parts of metallocene polyethylene, 10-25 parts of linear low-density polyethylene and 10-25 parts of low-density polyethylene. The density of the metallocene polyethylene is 0.900-0.918 g/cm < 3 >, the density of the linear low-density polyethylene is 0.915-0.921 g/cm < 3 >, and the density of the low-density polyethylene is 0.920-0.925 g/cm < 3 >. According to the PE blown film for liquid packaging provided by the invention, the metallocene polyethylene, the linear low-density polyethylene and the low-density polyethylene are mixed in proportion, so that the advantages of the metallocene polyethylene, the linear low-density polyethylene and the low-density polyethylene can be integrated, the rigidity and the toughness of the PE blown film are improved, and the stress strength and the rubbing performance of the PE blown film can be ensured even in a long-distance liquid transportation process; and meanwhile, through a multi-layer co-extrusion blow molding processing mode, the PE blow molding film has good tensile strength, right-angle tear strength, falling dart impact strength, heat sealing strength and rubbing performance, and the comprehensive performance of the film is improved.

Description

technical field [0001] The invention relates to the technical field of film materials, in particular to a PE blown film for liquid packaging and a preparation method thereof. Background technique [0002] With the rapid development of world trade, the demand for liquid transportation is also increasing, and the competition is also increasing. In the past, liquid transportation usually uses plastic drums, iron drums, film + carton packaging to transport liquids. This method has the characteristics of insufficient loading, high packaging costs and high transportation costs. In order to reduce transportation costs, medium and large liquids are now transported Used in the process, PE film is mostly used as packaging material. PE film is widely used in the packaging field, and can be applied to food and food additive packaging, non-hazardous liquid chemical packaging, industrial alcohol, acid and lipid packaging, and petroleum extract packaging. Wait. [0003] PE film has the c...

AI Technical Summary

Problems solved by technology

In the past, liquid transportation usually uses plastic drums, iron drums, film + carton packaging to transport liquids. This method has the characteristics of insufficient loading, high packaging costs and high transportation costs. In order to reduce transportation costs, medium and large liquids are now transported Used in the process, PE film is mostly used as packaging material. PE film is widely used in the packaging field, and can be applied to food and food additive packaging, non-hazardous liquid chemical packaging, industrial alcohol, acid and lipid packaging, and petroleum extract packaging. Wait

[0003] PE film has the characteristics of moisture resistance and low moisture permeability, as well as good chemical stability and good ductility, so it can be used as a packaging material for small and medium-sized liquid transportation. The inside will vibrate very violently with the start and brake of the vehicle. At the same time, due to the weight of the liquid itself, the conventional PE film is easy to be in the tear when large package

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