... ring for filtering waste gas: 1.material:PE,PP,RPP,PVC,CPVC,PVDF 2.diameter:16mm,25mm,38mm,50mm,76mm Plastic tower packing ... For these reasons it is widely used in the packing towers in petroleum industry, chemical industry, alkali-Chloride ... environmental protection, etc. Physical & chemical properties of plastic tower packing Performance / MaterialPEPPRPPPVCCPVCPVDFDensity (g/cm3)0.94-0.960.89 ...