Degradable foamed and co-extruded PA barrier thin film

Abstract

The invention discloses a degradable foamed and co-extruded barrier thin film. The thin film is characterized in that biodegradability of materials in the composite thin film tends to be uniform by introducing a biologic base, adding amount of adding-type master batch in each material is controlled within a range of being 0.3-15% of total mass of the corresponding material; hydrophilic activity of hydrophilic group in the adding-type master batch should be larger than or equal to that of hydrophilic group in each material. By adding the adding-type master batch, mole ratio of the hydrophilic group and carbon atom of each material tends to be uniform, in other words, bioactivity tends to be uniform, so that degrading rate of each layer of the composite thin film tends to be uniform. By balancing the mole ratio of the hydrophilic group and the carbon atom in each layer, bioactivity and biodegradability which tend to be uniform are acquired, and appearance, function and physical and mechanical performance of the thin film remain unchanged.

Description

technical field [0001] The invention relates to the technical field of multilayer composite films, in particular to a degradable foamed co-extruded PA barrier 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 public...

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.