Degradable plastic film

Abstract

A degradable plastic film is composed of film-grade polyethylene and film-grade polylactic acid. The weight percentage of film-grade polyethylene is 50%-80%, and the weight percentage of film-grade polylactic acid is 20%-50%. Polylactic acid is an ideal fully degradable plastic, and film-grade polylactic acid and film-grade polyethylene can be blended to make degradable plastic films with different degradation rates. The invention can be produced by an ordinary plastic film blowing machine. During production, the film-grade polyethylene particles and film-grade polylactic acid can be evenly mixed, and the degradable plastic film can be blown by the plastic film blowing machine. The composition of the present invention has polylactic acid and film-grade polyethylene plastics, because polylactic acid will decompose automatically when the ambient temperature is higher than 55°C or under the action of oxygen-enriched and microorganisms, the discarded polylactic acid film will be in the discarded environment , can guarantee degradation.

Description

technical field [0001] The invention relates to a degradable plastic film, in particular to a composition of the degradable plastic film. Background technique [0002] The plastic bag made of plastic film is light, thin, impermeable, strong, and low in cost. It is a good packaging material. The use of plastic bags brings great convenience to people's lives, making plastic bags The amount of use is increasing, and the waste plastic bags after use are not easy to recycle and degrade. A large number of waste plastic bags have become a serious problem of current environmental pollution. In order to reduce the pollution of plastic films to the environment, some degradable plastic films have been developed. Degradable plastic film is a film composed of film-grade plastics and components that can cause plastic degradation, such as starch, calcium carbonate, etc. This degradable plastic film is an additive degradable plastic film, additive degradable plastic Thin films play a posi...

AI Technical Summary

Problems solved by technology

However, the processing performance of this degradable plastic film is not good, and the physical properties and appearance of the plastic film produced are poor; in addition, the degradation of this degradable plastic film requires certain fixed conditions, and the environment after the plastic film is discarded, Either it is placed in a closed garbage disposal system, or it is exposed to the natural environment with unstable conditions. It is difficult to guarantee the fixed conditions required for the degradation of this plastic film. In most cases, these degradable plastics, whether in In the waste treatment system or in the natural environment, it cannot be degraded well due to limited conditions

In the prior art, there is no degradable plastic film that can guarantee degradation in the environment after disposal