... are big factory specilized in manufacturing pvc resin for 20 years . PVC plastic materailhave soft and hard PVCsuspension gradebest quality Because of ... pipes, fittings, pipelines, centrifugal pumps and blowers and so on. PVC hard board is widely used in the chemical industry produced ... , switches and cables. In daily life, for the manufacture of PVC sandals, raincoat, toys and leather and so on!