Optimization of filming technology of water-soluble PVA film

The water-soluble PVA film can pass natural factor to degradable quickly, meeting the environmental protection request. It is a kind of new green packing material. The experiment took the polyvinyl alcohol as the main material, add other materials such as intensifiers, plasticizers, emulsifying agents and disengage agents to the film, made into water-soluble gum that the content was 15.0%～18.0%, upper-class follow to draw the cloth to become the film on the steel plate, took off the film after it was dried. The optimal film-forming conditions were obtained through single-factor experiments and orthogonal experiments. The results show that the optimum film forming technology is as follows: the polyvinyl alcohol concentration is 11.0%, the soluble starch concentration is 1.0%, and the glycerin concentration is 4.0%, the polydimethyl siloxane fluid concentration is 0.8% and the tween 80 concentration is 1.0%. The film-formed is dried at 80～90℃ for 20 minutes, then the water-soluble PVA films with better properties are obtained.