Advantages: Rigid PVC is one of the most widely used plastic materials. PVC material is a non-crystalline material.
In actual use, PVC materials often add stabilizers, lubricants, auxiliary processing agents, pigments, impact resistance 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 acids such as concentrated sulfuric acid and concentrated nitric acid, and it is not suitable for contact with aromatic and chlorinated materials.
Disadvantages: The melting temperature of PVC during processing is a very important process parameter. If this parameter is not appropriate, 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, PVC materials with large molecular weight are more difficult to process (this material usually needs to be added with lubricant to improve flow characteristics), so PVC materials with low molecular weight are usually used.
The shrinkage rate of PC is quite low, generally 0.2~0.6%.
PVC is easy to release toxic gases during the molding process.