Full-degradable plastic film used for far-infrared food fresh-keeping and preparation method thereof

Abstract

The invention discloses a full-degradable plastic film used for far-infrared food fresh-keeping. The full-degradable plastic film is prepared from, by weight, 60 to 65 parts of corn starch, 7 to 9 parts of nano montmorillonite, 0.6 to 0.7 part of peanut oil, 1.2 to 1.4 parts of tetrabutyl titanate, 12 to 14 parts of ramie straw, 30 to 35 parts of polyvinyl alcohol, 13 to 15 parts of tributyl citrate, 5 to 7 parts of tourmaline, 2 to 3 parts of chitosan, 1.5 to 2 parts of magnesium stearate, 3 to 5 parts of polyethylene glycol, and 1 to 2 parts of talcum powder. The combination of the full-degradable plastic film is reasonable; the full-degradable plastic film can be made into food preservative film or fruit packaging bags, contains tourmaline powder, is capable of emitting far infrared ray and negative ions, and can be used for food fresh-keeping; a preparation method is convenient for industrialized control; obtained products are safe and nontoxic; complete biodegradation after discarding can be realized; and no harm is caused on the environment.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a fully degradable plastic film for far-infrared food preservation and a preparation method thereof. Background technique [0002] At present, the development speed of the traditional polymer material industry has been slowed down due to the increasing cost caused by the dwindling oil resources. At the same time, the environmental pollution caused by polymer materials has become increasingly prominent, which has attracted great attention from the society. Natural polymer materials are recyclable resources, which can be decomposed by microorganisms into non-polluting substances, such as inorganic small molecules, water and carbon dioxide, etc., and natural polymer materials have strong plasticity, can be passed A variety of modification methods make it a desired functional material with certain special properties. Therefore, many countries have invested a lot of manpower and...

AI Technical Summary

Problems solved by technology

However, while starch improves the degradability of plastics, on the one hand, it will cause a decrease in its physical and mechanical properties, making it difficult to process. On the other hand, it is also too hydrophilic, which is not compatible with most general-purpose resins. Poor, resulting in a significant decline in the mechanical properties of the film, poor water resistance, thus hindering the wide application of starch plastics in the process of industrialization