Two-way easy-to-tear film

Abstract

The invention discloses a two-way easy-to-tear film. The two-way easy-to-tear film is three layers, including an outer layer, a middle layer and an inner layer. The outer layer comprises high-pressurelow-density polyethylene, low-pressure high-density polyethylene, linear low-density polyethylene and an ethylene-acrylic copolymer; the middle layer includes low-density polyethylene, metallocene medium-density polyethylene, an ethylene-methacrylic acid copolymer, and an ionomer or ethylene-norborneol dilute copolymer; and the inner layer comprises high pressure low density polyethylene, metallocene low density polyethylene, linear low density polyethylene, an ethylene-octene copolymer and functional master batch. The two-way easy-to-tear film has characteristics of good compound fastness, good customer experience and low cost, and is easy to tear in straight line in two directions.

Description

technical field [0001] The invention relates to the technical field of packaging films, in particular to a film blown by co-extrusion using raw materials such as low-density polyethylene, high-density polyethylene, ethylene-methacrylic acid copolymer, ionomer or ethylene-polybornene copolymer. Formed two-way easy-tear film. Background technique [0002] With the continuous improvement of people's living standards, the demand for the performance of plastic flexible packaging is no longer limited to shelf display, sealed protection of contents, and easy portability. How to open the package conveniently and quickly has become a trend. The easy-to-tear design of food and drug outer packaging reflects the convenience of life, and no tools are needed to open it. However, one of the existing easy-to-tear films is to achieve easy-to-tear through tearing holes or zigzag lines; the other is to control the easy-to-tear effect by controlling the depth of the laser cutting line, and th...

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the poor tear guide of the tear or jagged line, it often leads to poor tear or uneven edge of the tear, causing the contents to spill;

[0004] 2. The laser cutting line is easy to tear. Although the tear is smooth, if the cut is too deep, the sealing of the package will be deteriorated, and the shelf life will be affected. If the cut is too shallow, it is not easy to tear;

[0005] 3. Both of the above two methods require subsequent processing of the packaging bag, the position of the tear opening or the easy-tear line is fixed, and the packaging bag only has an easy-tear effect in a specific area, which cannot fully meet the needs of people's efficient life;

[0006] 4. Low efficiency and difficult process control

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