... PP,Acrylic,PPS,Nomex,P84,PTFE,FMS,Glassfiber Felt Material: Polyester fiberWeight (g): 500 Thickness (mm):2.0mm Air Permeability ... can finish them with singeing, calendering, heat setting, Teflon coating and membrane. polyester needle felt adopt nonwoven workmanship, with the property of ... cake release, high filter efficiency, save energy, long life. Polyester Needle Punched Felt-Industrial Fabric