Degradable film preparation process

Abstract

The invention provides a degradable film preparation process, comprising the following steps: (1) Preparation of photodegradable masterbatch: drying the photosensitizer for 0.5-1h, drying the dried photosensitizer, dispersant, polypropylene resin, antioxidant, Mix and granulate hydrophobic agent and lubricant to prepare photodegradable masterbatch; (2) Preparation of starch-based degradable masterbatch: dry starch for 0.5-1h, mix and stir dried starch and coupling agent evenly to prepare starch mixture, Then mix and granulate the starch mixture with polypropylene resin and plasticizer to obtain starch masterbatch; (3) preparation of degradable film: mix photodegradable masterbatch and starch masterbatch and dry for 0.5-1h, then dry the dried The photodegradable masterbatch and starch masterbatch are kneaded at high speed in a high-speed kneader to obtain a blow molding masterbatch, and the blow molding masterbatch is blow molded to obtain a degradable film. The process is simple and the cost is low, and the prepared degradable film has good mechanical properties, high degradation rate and uniform degradation.

Description

technical field [0001] The invention belongs to the technical field of film materials, and in particular relates to a preparation process of a degradable film. Background technique [0002] Thin films have become indispensable synthetic materials in people's production and life. With the continuous growth of film production, it brings convenience to people but also brings serious environmental pollution. For example, agricultural film, as a means of agricultural production, is widely used in modern agriculture, but if the waste agricultural film is not cleaned If it is not clean, it will bring great disadvantages to the environment and agricultural production. Long-term use of the agricultural film left on the land will cause crop yield reduction, land desertification, river blockage, and cause livestock to eat and die, which seriously damages the environment. If the residual plastic film per mu exceeds 22kg, the yield of crops will be reduced by 25%. If the low residual p...

AI Technical Summary

Problems solved by technology

With the continuous growth of film production, it brings convenience to people but also brings serious environmental pollution. For example, agricultural film, as a means of agricultural production, is widely used in modern agriculture, but if the waste agricultural film is not cleaned If it is clean, it will bring great disadvantages to the environment and agricultural production.

Long-term use of the agricultural film left on the land will cause crop yield reduction, land desertification, river blockage, and cause livestock to eat and die, which seriously damages the environment

If the residual film per mu exceeds 22kg, the yield of crops will be reduced by 25%. If the residual film per mu exceeds 50kg, the land will not be cultivated and will lead to desertification

Therefore, the degradable film has been widely used, but the existing degradable film preparation process, some of the process is complicated, the production cost is high, and the degradable film prepared by some has a single property and uneven degradation.

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