Environment-friendly degradable plastic bag

Abstract

The invention discloses an environment-friendly degradable plastic bag. The environment-friendly degradable plastic bag comprises the following components of 30-55 parts of low density polyethylene, 20-26 parts of polyvinyl alcohol resin, 3-5 parts of butantriol, 2-6 parts of photocoupler, 5-10 parts of a degradation accelerator, 2-7 parts of cellulose acetate, 1-10 parts of diatomite, 1-4 parts of a chelating agent, 2-5 parts of an emulsifying agent and 3-7 parts of a self-collapsing agent in parts by weight. The environment-friendly degradable plastic bag, disclosed by the invention, has theadvantages that cross-linking and gelation caused by thermal ageing in the plastic bag machining process can be prevented by adding the photocoupler and the chelating agent to a polyethylene molded plastic system in a synergistic manner, thermostability and oxidation resistance of the prepared plastic bag can be greatly improved; a plastifying effect can also be realized; and meanwhile, as the degradation accelerator is added to the material, the prepared plastic bag obtains excellent biological degradability.

Description

technical field [0001] The invention relates to an environment-friendly degradable plastic bag. Background technique [0002] Polyethylene (PE for short) is a thermoplastic resin obtained by polymerization of ethylene. Polyethylenes are crystalline thermoplastic resins whose chemical structure, molecular weight, degree of polymerization and other properties are largely dependent on the polymerization method used. Polyethylene is a typical thermoplastic, which is an odorless, tasteless, non-toxic, flammable white powder; polyethylene is easy to be photooxidized, thermally oxidized, and ozonized, and it is easy to degrade under the action of ultraviolet rays; polyethylene has good chemical stability. At room temperature, it can withstand dilute nitric acid, dilute sulfuric acid and any concentration of hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, ammonia water, amines, hydrogen peroxide, sodium hydroxide, potassium hydroxide and other solut...

AI Technical Summary

Problems solved by technology

[0003] Plastic bags are a necessity in people's daily life, but the direct contradiction between the convenience of using plastic bags and environmental pollution is becoming more and more serious. For this reason, the country has issued a plastic restriction order, but the effect is not too obvious. In addition to reducing the use of plastic bags In addition, the material of plastic bags is also an aspect that needs to be considered. For this reason, people have begun to study degradable plastic bags. Although there are many researches and reports on degradable plastics, many specific problems cannot be solved, and the color of degradable plastic bags is dim. Yellowing, low transparency, giving people a feeling of not being clean enough and ugly, so it is not safe to use

In addition, the load-bearing capacity of degradable plastic bags is low, which cannot meet the requirements of customers for loading more things and repeated use; degradable plastics containing starch have poor water resistance and poor wet strength, and their mechanical properties will drop sharply when they encounter water.