... 3,With Smooth Surface PPS Non-woven filter bags for cement \PTFE MembraneProduct Name PPS\PTFE MembranePhysical ... PTFE sewing thread is used to sew dust filter bags such as PTFE, fiberglass, PPS, Nomex, ... laminated on dust filter cloth and dust filter bags for high filtration efficiency and long life ... time.Dust filter bags widely used in cement plant, power plant, ...