Fully-degradable plastic film with excellent thermal stability for color printing packaging and manufacturing method of fully-degradable plastic film

Abstract

The invention discloses a fully-degradable plastic film with excellent thermal stability for color printing packaging. The fully-degradable plastic film is characterized by being made from the following raw materials, by weight part, 80-85 of polylactic acid, 20-25 of corn starch, 12-14 of glycerin, 1.6-2 of epichlorohydrin, a proper amount of a sodium hydroxide solution with the concentration being 1 mol/L, a proper amount of hydrochloric acid with the concentration being 1 mol/L, a proper amount of distilled water, 25-30 of hemp fibers, 0.8-1 of a silane coupling agent kh-550, 3-4 of peach gum powder, 2-3 of castor oil, 3-4 of zirconia powder and 3-4 of silicon oxide. Zirconia powder and silicon oxide are modified and added in polylactic acid for inner mixing, so that modified zirconia powder and silicon oxide can be uniformly dispersed and the thermal stability and strength of the plastic film are improved. According to the formula and the technical innovation, the plastic film is good in thermal stability and toughness and is high in strength. Through addition of corn starch, the cost is reduced. The plastic film is safe and non-toxic and can be used for color printing packaging.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a fully degradable plastic film for color printing and packaging with good thermal stability and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly serious "white pollution" caused by waste plastics that are difficult to degrade, it has attracted widespread attention from all over the world. Countries around the world have successively issued relevant laws and regulations restricting or prohibiting the use of non-degradable plastic packaging. On the other hand, because petroleum, the raw material for making traditional plastics, is a non-renewable resource, it will be exhausted with the massive use of human beings. Therefore, it is imminent to develop environmentally friendly plastics that use renewable resources as raw materials and are degradable. [0003] Polylactic acid material is one of the most widely used degradable ...

AI Technical Summary

Problems solved by technology

[0003] Polylactic acid material is one of the most widely used degradable plastic materials at present. As a packaging film material, PLA has good transparency, mechanical properties and biocompatibility, high strength, thermoplasticity, hydrophobicity, easy molding and processing, and can be completely Degradation, the degradation products are non-toxic and harmless to the human body, come from renewable resources, and are easy to recycle, etc., but the defects of polylactic acid are expensive, high brittleness, and low toughness affect its application in a wider range of fields