PVC is a kind of plastic used widely in building materials. Therefore, it will not be replaced for a long time in the future, and it will have great application prospects in less developed areas in the future.
As we all know, there are two ways to produce PVC, one is the international common ethylene method, and the other is the unique calcium carbide method in China. The sources of ethylene method are mainly petroleum, while the sources of calcium carbide method are mainly coal, limestone and salt. These resources are mainly concentrated in China. For a long time, China's PVC of calcium carbide method has been in an absolute leading position. Especially from 2008 to 2014, China's PVC production capacity of calcium carbide method has been increasing, but it has also brought many environmental protection problems.