... .Denstiy (g/cm3):2.7 calcium carbonate for pvc pipe1.useage: Paint, Dope, Rubber, PVC pipe, Paper making etc as stuff materials2 ... of rubber or plastic products to improve the rigidity. Intensity, heat-resistance, reduce the contractibility of finished products and decrease the ... of sheath of PVC wires and cables, PVC leatheroid, PVC pipe material, PVC section material, particles of TRP, PVC threads. ...