... .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 ... -combustibility. It resists acid and alkali, organic solvents and grease, limited oxygen index LOI value is 38, can be ...