Fully biodegradable composite film and preparation method thereof

Abstract

The invention discloses a fully biodegradable composite film which is prepared from the following components in parts by weight: polyglycolic acid, polyhydroxybutyrate, poly(L-lactide-epsilon-caprolactone), fatty glyceride, a slipping agent, a water blocking agent, reinforced fibers, talcum powder, pentaerythritol diphosphite, chitosan, starch and other materials. The invention further provides apreparation method of the fully biodegradable composite film. The fully biodegradable composite film and the preparation method disclosed by the invention have the advantages that the composite film has excellent microbial degradability and hydrolytic property, the final forms of the decomposed fully biodegradable materials are water and carbon dioxide, and the final product is environmental-friendly; the composite film is safe and non-toxic and does not cause potential health threat to animals and human beings; the composite film has excellent mechanical property, and various application requirements of packaging materials are fully met; cheap and pollution-free packing is increased under the condition that the mechanical property is not influenced, and the cost is effectively reduced; the preparation process is simple.

Description

technical field [0001] The invention relates to the fields of medical treatment and packaging materials, in particular to a fully degradable composite film with low cost, good toughness and simple preparation and a preparation method thereof. Background technique [0002] Plastic packaging bags have become a necessity in daily life, with a large amount of use and a huge amount of waste. Plastic packaging bags are mostly made of polyethylene film or polyvinyl chloride with some performance-improving additives. In addition to possible damage to the human body, the most important thing is that natural degradation is slow, and because of the huge amount of use and less recycling, waste plastics Packaging bags often form more and more serious "white pollution". "White pollution" not only causes visual pollution to life, but also endangers agricultural production and ecological cycle. [0003] As plastic production continues to grow and its uses continue to expand, its waste is ...

AI Technical Summary

Problems solved by technology

However, it has certain chemical toxicity and poor stability, which is not conducive to popularization and practicality.

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