Degradable pp-evoh high barrier composite film

Abstract

A degradable PP-EVOH high resistance composite thin-film; each layer of the material in the composite thin-film obtains substantially same biodegradability through the introduction of a biological base; the added amount of an additive masterbatch in each layer of the material is controlled to be in the range of 0.3-15 % of the total mass of the layer of the material; the hydrophilic activity of a hydrophilic group in the additive masterbatch should be greater than or equal to the hydrophilic activity of a hydrophilic group in each layer of the material; by adding the additive masterbatch, the molar ratio of the hydrophilic groups to the carbon atoms in each layer of the material is substantially the same; that is, the biological activity is substantially the same, such that the degradation rate of each layer of the material is substantially the same, while the appearance, function and physical and mechanical properties of the product remain unchanged.

Description

technical field [0001] The invention relates to the technical field of multilayer composite films, in particular to a biodegradable PP-EVOH high barrier composite film. Background technique [0002] Multi-layer co-extruded composite film refers to a film compounded by a variety of different polymers by co-extrusion blow molding, co-extrusion casting or co-extrusion stretching. As a plastic packaging material, this film is widely used in food, processed meat products, daily necessities, cosmetics, chemical products, pesticides, military products, etc. Packaging function, with various barrier properties such as high moisture resistance, oxygen resistance, oil resistance, and fragrance retention in various environments. [0003] With the use of a large number of composite films in various fields, the pollution of composite films to the environment is increasing day by day. Because it is difficult to degrade, the pollution caused by the composite film has become a worldwide pu...

AI Technical Summary

Problems solved by technology

At present, some traditional methods for dealing with composite film waste, such as incineration, landfill, recycling, etc., have defects, and have certain limitations that bring serious load to the environment. Therefore, the development of biodegradable composite films that reduce environmental pollution is a solution to the environment. important way of pollution

[0004] As far as the applicant knows, the biodegradation technology and application technology of the composite film with the same degradation rate is still a blank, and there are no relevant reports at home and abroad.