A special bright and hard special bag-making film

Abstract

The invention discloses an ultra-bright and ultra-hard special bag making film. The ultra-bright and ultra-hard special bag making film is subjected to three-layer co-extruding by a casting machine, and has an outer layer, a middle layer and an inner layer which are compounded together, wherein the inner layer is formed by mixing ternary atactic polypropylene used as a base, metallocene low-density polyethylene and an anti-blocking agent in a ratio of 40 to 4 to 1; the middle layer is formed by mixing high-impact-resistance drawing polypropylene and a nucleating agent in a ratio of 10 to 1; and the outer layer is made of the high-impact-resistance drawing polypropylene; and the ratio of an inner speed to an middle speed to an outer speed of extruding speeds is 26% to 37% to 37%. The produced finished product has extremely good transparency and the high transparency requirements on the product by consumers are met; resin which is used by the thin film in a production process is a raw material with a good separation performance, and the separation performance and the impermeability of the bag making film are improved, so that various indexes of the film are improved and the film is prevented from air leakage; and the fragrance keeping performance of food is good and the quality keeping time of the food is prolonged.

Description

technical field [0001] The invention relates to a bag-making film, in particular to a special-purpose bag-making film with extra brightness and hardness. Background technique [0002] The traditional CPP bag-making film has a soft hand feeling and average transparency. The finished packaging bag is not smooth, the brightness is average, and the bag is soft but not hard. However, with the improvement of people's requirements for packaging bags, the requirements for the hardness and transparency of the film are getting higher and higher; and in production, the heat sealing temperature of the film is lowered to make the finished bag flat, high in brightness, good in shape and hardness Large, can not only meet the needs of users, but also reduce the cost of producers, a new preparation method is needed for bag-making films. Contents of the invention [0003] The purpose of the present invention is to solve the problems existing in the current technology and provide a special ...

AI Technical Summary

Problems solved by technology

[0002] The traditional CPP bag-making film has a soft hand feeling and average transparency. The finished packaging bag is not smooth, the brightness is average, and the bag is soft but not hard.