Degradable plastic packaging bag

Abstract

The present invention belongs to the field of plastic products, and particularly relates to a biodegradable plastic packaging bag which is characterized by comprising the following components by weight: 5-15 parts of ethyl cellulose, 10-20 parts of polyethylene, 15-30 parts of modified starch, 15-30 parts of corn starch, 15-30 parts of sweet potato starch, 20-40 parts of polylactic acid, 2-10 parts of calcium carbonate powder, 1-5 parts of a lubricant, 1-5 parts of a plasticizer, 1-3 parts of a toughening agent, 1-10 parts of a degradation accelerator, 1-5 parts of polyvinyl alcohol, 2-5parts of chitosan, 1-5 parts of a compatibilizing agent and 2-6 parts of polycaprolactone. The biodegradable plastic packaging bag begins to thin, lose in weight, reduce in strength, then gradually splits into fragments after being exposed to the environment for two months, when these fragments are buried in garbage or soil, the degradation effect is very obvious; by addition of the plasticizer and the calcium carbonate powder, the added ingredients may enhance the tensile strength of the plastic packing tape, reduce the air and moisture permeability, and maintain the original characteristics of the plastic packaging bag.

Description

technical field [0001] The invention belongs to the field of plastic products, in particular to a degradable plastic packaging bag. Background technique [0002] Plastic packaging bags are polymer compounds made of monomers as raw materials through addition polymerization or polycondensation reactions. They are generally made of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. In people's daily life, plastic packaging bags are widely used, but the "white pollution" caused by waste plastics is becoming more and more serious. With the enhancement of people's awareness of environmental protection, how to alleviate white pollution has become a topic of increasing concern. Degradable plastic packaging bag is an emerging plastic product in recent years. Its various properties can meet the requirements of use and have the characteristics of unchanged performance during the storage period. After use, it can be degraded into envir...

AI Technical Summary

Problems solved by technology

[0003] At present, although there are various degradable plastic packaging bags on the market, tests have shown that most degradable plastic packaging bags generally begin to become thinner, lose weight, and lose strength after being exposed to the environment for 3 months, and gradually break into pieces. If these fragments are buried in garbage or soil, the degradation effect is not obvious

In addition, some additives in degradable plastics will change some characteristics of plastics, such as increased air permeability and moisture permeability, poor tensile strength, etc., which is not conducive to the promotion and application of degradable plastic packaging bags