PVC soft plastic bags have more plasticizers, which are soft and flexible;

PVC (polyvinyl chloride) chemical and physical properties Rigid PVC is one of the most widely used plastic materials. PVC material is an amorphous material. PVC materials are often added with stabilizers, lubricants, auxiliary processing agents, colorants, impact agents and other additives in actual use.

PVC material has non-flammability, high strength, weather resistance, and excellent geometric stability. PVC is very resistant to oxidants, reducing agents and strong acids. However, it can be corroded by concentrated oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid, and it is not suitable for contact with aromatic and chlorinated hydrocarbons.

The melting temperature of PVC during processing is a very important process parameter. If this parameter is improper, it will cause the problem of material decomposition. The flow characteristics of PVC are quite poor, and its process range is very narrow. In particular, large molecular weight PVC materials are more difficult to process (this material usually requires a lubricant to improve the flow characteristics), so usually small molecular weight PVC materials are used. The shrinkage of PVC is quite low, generally 0.2 ~ 0.6%.