Degradable plastic film and production method thereof

Abstract

The invention relates to a degradable plastic film, which is characterized by comprising the following components in part by weight: 50 to 80 parts of film-grade polyethylene, 20 to 50 parts of film-grade polyactic acid, 2 to 10 parts of plasticizer and 1 part of heat stabilizer. A preparation method comprises the following steps of: preparing, rechecking, blanking, mixing, performing blow molding, inspecting, making a bag, performing quality inspection and warehousing. The degradable plastic film can be automatically decomposed at the environment temperature of higher than 55 DEG C or under the action of oxygen enrichment or microorganisms; the discarded film can be completely degraded and digested by the microorganisms in the natural world to generate carbon dioxide and water, and the polyactic acid is ideal completely degradable plastic; and degradable plastic with different degradation speeds can be prepared by blending the film-grade polyactic acid with film-grade polyethylene plastic. The degradable plastic film can be produced by the ordinary plastic film blowing machine, film-grade polyethylene particles and the film-grade polyactic acid can be uniformly mixed during production, and the degradable plastic film can be blown by the plastic film blowing machine.

Description

technical field [0001] The invention belongs to the technical field of degradable plastic films, in particular to an environment-friendly degradable plastic film and a production method thereof. Background technique [0002] As we all know, the plastic bag made of plastic film is light, thin, impermeable, strong, and low in cost. It is a good packaging material. The consumption of tape is increasing, and the discarded plastic bags after using are not easy to recycle, especially not easy to degrade, and a large amount of discarded plastic bags have become a serious problem of current environmental pollution. In order to reduce the pollution of plastic films to the environment, people have developed some degradable plastic films one after another. Degradable plastic film is a film, which consists of film-grade plastics and ingredients that can cause plastic production, such as starch, calcium carbonate, etc., but this degradable plastic film is an additive degradable plastic ...

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 within a certain period of time in the natural environment after being discarded

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