Fully-degradable material for shopping bags, mulching films and greenhouse films and preparation method of fully-degradable material

Abstract

The invention discloses a fully-degradable material for shopping bags, mulching films and greenhouse films and a preparation method of the fully-degradable material, and relates to the technical fieldof film production. The preparation method comprises the steps: adopting modified polyvinyl alcohol and modified vegetable gelatin or chitosan as main raw materials, adding a cross-linking agent, a waterproofing agent, a stabilizer, an anti-block agent, polyethylene wax, an antioxidant, a coupling agent and other agents, performing high-speed stirring, performing treatment by using a casting method or granulation through a twin-screw machine, and performing treatment by using a film blowing method so as to obtain the shopping bags, mulching films or greenhouse films. The fully-degradable material for the shopping bags, mulching films and greenhouse films and the preparation method of the fully-degradable material have the advantages that the prepared fully-degradable shopping bags, mulching films and greenhouse films have safety, no toxicity, harmlessness, toughness, softness and smoothness, good elasticity, high transparency, high tensile strength and low price, and traditional plastic products can be replaced completely; easy degradation is achieved, the material can be self-denatured through natural factors, and is decomposed and degraded into small molecular compounds, and thedecomposed products have the effect of soil improvement.

Description

technical field [0001] The invention relates to the technical field of film production, in particular to a fully degradable material used for shopping bags, mulch films and greenhouse films and a preparation method. Background technique [0002] Traditional plastic shopping bags, agricultural mulch films and greenhouse films are a kind of film made of plastic polyvinyl chloride, polyethylene, and polypropylene. Because plastics cannot be degraded, they become white garbage, which not only pollutes the environment, but also It has brought great harm to people's lives, and even caused cancer. For a long time, due to accidental ingestion of animals, even death and injury, there are many cases in daily life. In recent years, there have been many researches on degradable materials, but there are usually problems such as slow and incomplete degradation, poor material toughness, high price, and difficulty in popularization and application, and there are relatively few studies on de...

AI Technical Summary

Problems solved by technology

[0002] Traditional plastic shopping bags, agricultural mulch films and greenhouse films are a kind of film made of plastic polyvinyl chloride, polyethylene, and polypropylene. Because plastics cannot be degraded, they become white garbage, which not only pollutes the environment, but also It has brought great harm to people's lives, and even caused cancer. For a long time, due to accidental ingestion of animals, even death and injury, there are many cases in daily life

In recent years, there have been many researches on degradable materials, but there are usually problems such as slow and incomplete degradation, poor material toughness, high price, and difficulty in popularization and application, and there are relatively few studies on degradable materials used for greenhouse films. Usually, the application of degradable greenhouse films is hindered by problems such as toughness and transparency.