Multi-degradable plastic film and preparation method thereof

Abstract

The invention discloses a multi-degradable plastic film which comprises the following components in percentage by weight: 85-98.7% of a polymer substrate, 0.1-1% of nano-titanium dioxide, 0.1-1% of kaolin, 0.1-1% of ferric stearate and 1-2% of hydrophilic resin. A preparation method of the multi-degradable plastic film comprises the following steps: uniformly mixing polyolefin, nano-titanium dioxide, kaolin, ferric stearate and hydrophilic resin in percentage by mass, melting and pelleting, and performing blow molding by using a blow molding machine, thereby preparing the multi-degradable plastic film. The multi-degradable plastic film has the beneficial effects that firstly, the use property of a product is not affected, and the basic requirements of daily life, agriculture use and the like can be met; secondly, multi-degradation can be achieved by using light, heat and biological substances, and due to the added hydrophilic resin, the plastic film can easily absorb the moisture in the air and the soil, multi-degradation is accelerated, and complete degradation is achieved.

Description

technical field [0001] The invention relates to a degradable plastic film, in particular to a multiple degradable plastic film and a preparation method thereof. Background technique [0002] The use of plastic products is convenient for people's life, but it brings more environmental pollution. In recent years, in order to reduce the white pollution caused by plastics, the development and use of degradable plastics has become more and more important. Common degradable plastics polylactic acid (PLA), polybutylene succinate (PBS), polycaprolactone (PCL), polyvinyl alcohol (PVA), poly-β-hydroxybutyrate (PHB), Polyhydroxyalkanoate (PHA), carbon dioxide copolymer, aliphatic aromatic copolymer, etc. Although degradable plastics have the advantages of reducing the volume after degradation, saving land resources, eliminating the need for incineration, and reducing harmful gas emissions, however, degradable plastics still have disadvantages such as high cost and poor physical and m...

AI Technical Summary

Problems solved by technology

Although degradable plastics have the advantages of reducing the volume after degradation, saving land resources, not incinerating, and reducing harmful gas emissions, but degradable plastics still have disadvantages such as high cost and poor physical and mechanical properties, which affect their application range.

Chinese patents "Full Starch Biodegradable Plastics" (200310111110.7) and "Fully Degradable Additives and Fully Degradable Plastic Products" (98114170.6) have reported biodegradable plastics processed from easily biodegradable materials such as starch and cellulose, Although this type of plastic can be completely biodegraded, most of them have disadvantages such as high production technology content, high price, poor mechanical strength, weak heat resistance and water resistance.