Now PVC film has been widely used everywhere, why so popular? PVC with its good performance, simple technology and many other advantages gradually won the favor of people, also received more and more people's favor. PVC film, PVC film has its characteristics, the following to introduce the chemical and physical characteristics of PVC film.
Rigid PVC is one of the most widely used plastic materials. PVC is actually a kind of vinyl polymeric material, its material is a kind of amorphous material. In practical use, PVC materials often add stabilizer, lubricant, auxiliary processing agent, color, impact resistance agent and other additives. It has non-flammability, high strength, resistance to climate change and excellent geometric stability. The transparent membrane of PVCpvc is highly resistant to oxidants, reductants and strong acids. However, it can be corroded by concentrated oxidizing acids such as sulfuric acid and nitric acid and is not suitable for contact with aromatic hydrocarbon and chlorinated hydrocarbon.
The melting temperature of PVC during processing is a very important technological parameter, if this parameter is not appropriate, it will lead to the problem of material decomposition. The flow characteristic of PVC is quite poor, and its process range is very narrow. In particular, PVC materials with high molecular weight are more difficult to process (this material is usually added with lubricant to improve flow characteristics), so it is usually used with low molecular weight PVC materials. PVC shrinkage is quite low, generally 0.2~0.6%.