Degradable film and preparation method thereof

Abstract

The invention discloses a degradable film. The degradable film is prepared from the following raw materials by weight percentage: 50%-60% of PVA, 20%-30% of corn starch, 20%-30% of glycerin, 2.5%-3% of a cross-linking agent PLA, 20%-30% of a filling modifier sugarcane fiber and 870%-1000% of purified water. The invention discloses a preparation method of the degradable film. The method includes the steps of: A. soaking: adding 50%-60% of PVA and 500%-600% of purified water into a steam heating stirring tank, stirring the substances evenly and performing standing for standby use. According to the invention, the macromolecular PVA and starch structure is filled with the micromolecular filling modifier sugarcane fiber to obtain the PVA film with higher strength, the water resistance of the film is strengthened, the film still keeps certain strength and elasticity after being soaked in water for a period of time, can be recycled, and is finally hydrolyzed and broken after being soaked in water for a long time, the degradation process is rapid, waste discarding is reduced, and stepwise heating and stepwise mixing avoid overheating decomposition of starch and other organic raw materialsand the influence on cross-linking.

Description

technical field [0001] The invention relates to the field of degradable film and preparation technology, in particular to a degradable film and a preparation method. Background technique [0002] The characteristics of similar products currently on the market: PVA, a water-soluble material, is used as the main component of the film. The anti-static effect is good, and it can be printed directly without corona treatment, but the cost of this film is twice that of ordinary plastics, and the marketization process is slow. Food or non-food films made of PVA have lower strength than ordinary plastics, but the degradation rate is very fast. High, environmental protection effect is obvious, the defect of similar products on the market at present: PVA film is very soluble in water, water resistance is insufficient, can not be recycled twice, after the film is made, it can be stored at room temperature (temperature 25 ℃, humidity 30%) It is easy to lose water, resulting in dry and u...

AI Technical Summary

Problems solved by technology

[0002] The characteristics of similar products currently on the market: PVA, a water-soluble material, is used as the main component of film formation. The anti-static effect is good, and it can be printed directly without corona treatment. However, the cost of this film is twice that of ordinary plastics, and the marketization process is slow. Food or non-food films made of PVA have lower strength than ordinary plastics, but the degradation rate is very fast. High, environmental protection effect is obvious, the defect of similar products on the market at present: PVA film is very soluble in water, water resistance is insufficient, can not be recycled twice, after the film is made, it can be stored at room temperature (temperature 25 ℃, humidity 30%) It is easy to lose water, causing the film to be dry, uneven, and the service life is obviously shortened. The film strength is low, and its physical parameters are less than half of the strength of ordinary polyethylene film.

Images