... Pressure 2,Easy Dust Cleaning 3,With Smooth Surface PPS Non-woven filter bags for cement \PTFE MembraneProduct Name ... PPS\PTFE MembranePhysical PropertiesFiber PPSScrim PPS Spun YarnMembrane ePTFEWeight/Tolerance (g/m2) 500 Thickness ... used to sew dust filter bags such as PTFE, fiberglass, PPS, Nomex, P84 and so on.PTFE membrane can be laminated ...