Rigid PVC is one of the widely used plastic materials using Zui. PVC material is a kind of non crystalline material.
PVC materials are often added stabilizers, lubricants, auxiliary processing agents, pigments, impact resistant agents and other additives.
PVC material has non flammability, high strength, weather resistance and excellent geometric stability.
PVC has strong resistance to oxidants, reducing agents and strong acids. However, it can be corroded by concentrated oxidizing acid such as concentrated sulfuric acid and concentrated nitric acid, and it is not suitable for the contact with aromatic hydrocarbon and chlorinated hydrocarbon.
The melting temperature of PVC is a very important process parameter during processing. If this parameter is improper, the problem of material decomposition will be caused.
The flow characteristics of PVC are rather poor, and the process range is very narrow. In particular, the PVC material with large molecular weight is more difficult to be processed (this material is usually added to the lubricant to improve the flow characteristics), so it is usually used for small molecular weight PVC materials.
The shrinkage rate of PVC is quite low, which is generally 0.2~0.6%.
PVC is easy to release toxic gases during the molding process.