Multi-layer degradation film

Abstract

The invention discloses a degradation film, particularly to a multi-layer degradation film, and belongs to the technical field of degradation, wherein the multi-layer degradation film sequentially comprises plural layers of degradation films from top to bottom, and separation films are respectively arranged between any two layers of the degradation films, and are used for isolating each degradation film, such that various layers of the degradation films can be separately degraded. According to the present invention, by arranging the separation layer to isolate oxygen and moisture, oxygen and moisture cannot enter the interior of the degradation film, such that the degradation film can be degraded layer by layer, and canot be degraded simultaneously; after the degradation film on the surface layer is degraded, the separation layer is dissolved under the action of water, and the degradation film on the next layer is degraded; and by controlling the number of the layers of the degradationfilms, the degradation time of the whole degradation film can be controlled at 6 months to 8 years.

Description

technical field [0001] The invention relates to a degradable film, in particular to a multi-layer degradable degradable film, which belongs to the technical field of degradation. Background technique [0002] The degradation of the film mainly refers to adding a certain amount of additives (such as starch, modified starch or other cellulose, photosensitizers, biodegradants, etc.) Under the action of environmental conditions such as force, insects and other animals and microorganisms, the macromolecular chain breaks to reduce the stability and gradually degrade in the natural environment. The degradation time of existing degradable films is mainly controlled by adjusting the ratio of additives. The degradation time can be better controlled by adjusting the ratio of additives within 3-6 months. The degradation time is required to be within 3-6 months. It is difficult to accurately control the degradation time of films of 1 year, 2 years and longer by adjusting the ratio. [...

AI Technical Summary

Problems solved by technology

By adding PLA with different molecular weights and adjusting the percentage ratio of PLA to TPU melt, the degradation time of the TPU film is controlled, so as to achieve the purpose of controlling the degradation time; although the degradation time can be controlled, in actual use, due to Due to the complexity and variability of the natural environment, it is difficult to control the degradation time. When the use environment changes, the ratio needs to be readjusted, and the operation is difficult.

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