Elastic barrier environmental friendly composite film

Abstract

The present invention relates to an elastic barrier environmental friendly composite film. The film is formed by multiple layers, and sequentially comprises a bottom-layer starch elastic film, a middle-layer polylactide strength elastic film, and an outer-layer starch elastic film. The film is characterized by further comprising inorganic fiber coatings and superhydrophobic coatings, wherein the inorganic fiber coatings are respectively arranged between the bottom-layer starch elastic film and the middle-layer polylactide strength elastic film and between the middle-layer polylactide strength elastic film and the outer-layer starch elastic film, and the superhydrophobic coatings are sprayed on the outsides of the bottom-layer starch elastic film and the outer-layer starch elastic film. The composite film has excellent strength, a certain elasticity and good thermal insulation and water resisting property, can be flameproof, and can be used for the field of high-grade film package.

Description

technical field [0001] The invention relates to a method for preparing a film, in particular to a method for preparing an environmentally friendly composite film with certain resilience, good strength and good waterproof and heat insulation properties. Background technique [0002] Although plastic materials have excellent performance and wide applicability, they are derived from petroleum products and cannot be degraded. In today's resource crisis and environmental pollution are becoming more and more serious, looking for excellent performance and renewable alternative materials has become the current research field in the field of materials. top priority. [0003] At present, the amount of packaging film is increasing, and widely used plastic films such as PE film, PP film, PET film, etc. have good mechanical properties and are easy to prepare, but cannot be degraded, resulting in serious white pollution. [0004] Among the degradable materials, starch has been deeply res...

AI Technical Summary

Problems solved by technology

Although polylactic acid has good biodegradability, processability, and excellent mechanical properties, it is brittle and brittle, lacks elasticity and flexibility, which largely limits the application of polylactic acid films.

[0005] As far as film needs are concerned, in addition to high requirements for mechanical properties, functional requirements are also put forward in some special fields, such as waterproof, air-proof, anti-bacterial, anti-rust, etc. in the field of food and drug packaging. Difficult to functionalize membranes of degradable materials

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