Chemical and physical properties of PVC film

PVC film is now widely used in various places, why is it so popular? With its good performance, simple craftsmanship and many other advantages, PVC has gradually won people's favor and received more people's favor. Both pvc film and pvc film have their own characteristics. The chemical and physical properties of pvc film will be introduced below.

Rigid PVC is one of the most widely used plastic materials. PVC is actually a kind of vinyl polymer, and its material is an amorphous material. In actual use, PVC materials often add stabilizers, lubricants, auxiliary processing agents, pigments, impact resistance agents and other additives. It has non-flammability, high strength, weather resistance and excellent geometric stability. PVC pvc transparent film 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 is not suitable for contact with aromatic hydrocarbons and chlorinated hydrocarbons.

The melting temperature of PVC during processing is a very important process parameter. If this parameter is not appropriate, it will cause material decomposition. The flow characteristics of PVC are quite poor, and its process range is very narrow. In particular, PVC materials with high 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 PVC is quite low, generally 0.2~0.6%.