A Composite Thin Film with Stable Friction Coefficient

Abstract

The invention relates to a composite thin film having stable friction coefficient. The composite thin film includes polypropylene thin film and biaxially oriented polypropylene thin film. Through regulation of formula of the polypropylene thin film, the composite thin film is prepared from the polypropylene thin film and the biaxially oriented polypropylene thin film through a solvent-free composition process. The composite thin film has good performance, stable friction coefficient and can satisfy high-speed automatic package of some product. The preparation of the composite thin film is free of solvent and is more environment-friendly, so that the composite thin film can ensure safety of food package. Compared with thin films prepared through a solvent composition process in the prior art, the composite thin film is increased by more than one times in production speed and is greatly increased in production efficiency.

Description

technical field [0001] The invention belongs to the technical field of packaging film production, and in particular relates to a composite film with a stable friction coefficient. Background technique [0002] With the development of economy and society, people pay more and more attention to food safety, and the requirements for food packaging bags are getting higher and higher. Food packaging bags have become a very important control factor for food safety. How to produce a high-quality Barrier, good sealing strength, high composite strength, safe and sterile food packaging bags are urgent; not only that, people's awareness of environmental protection is getting stronger and stronger, how to ensure that the production process of food packaging bags is more environmentally friendly, and at the same time continuously improve the quality of food packaging bags Safety and high barrier properties have become the development trend of flexible packaging. [0003] The existing sol...

AI Technical Summary

Problems solved by technology

In my country, food packaging bags are basically produced by solvent-based dry compounding process, which has certain impacts on energy consumption, environmental protection and sanitation, especially the problem of solvent residues, which has caused environmental and food safety problems. certain hazard

[0004] In addition, different packaging equipment has different requirements for packaging film materials. With the automation of product packaging, some manufacturers need packaging film materials to drive the packaged products when producing products. Ordinary packaging films cannot meet the requirements of equipment, such as ordinary CPP / The friction coefficient of BOPP packaging film produced by solvent-based dry compounding process is unstable, the friction coefficient is high, the roll film sticks, the film is not smooth, the friction coefficient is low, the product slips during transportation, and it is easy to deviate during the packaging process. Not conducive to the automatic packaging requirements of high-speed packaging equipment