... Plastic pall ring for filtering waste gas: 1.material:PE,PP,RPP,PVC,CPVC,PVDF 2.diameter ... 76mm Plastic tower packing is made from heat resistant and chemical corrosion resistant plastics, including polyethylene (PE), polypropylene (PP ... , coal gas industry and environmental protection, etc. Physical & chemical properties of plastic tower packing Performance / MaterialPEPPRPPPVCCPVCPVDFDensity (g/cm3)0. ...