... .acid resistance 3.excellent wear and tear resistanceNonwoven needle punched Filter bag1)Materials: Polyester, Nylon, PP, PE, PTFE, Nomex, ... )Usage: Air Filtration, Liquid filtration, Powder filtrationP84 (Polyimide) filter felt (the domestic and import fiber)base cloth and raw ... fiber, the product name is P84. This fiber is different from synthetic fiber, the irregular leaf cross section forms very ...