... customers' requirements. 1) Material: polyester, polypropylene, PPS, PTFE and all compound needle punched filter felt.2) Can do all ... ’ requirements, such as polyester, polyester, polypropylene, PPS, PTFE and all compound needle punched filter felt. 3) Used for normal ... high temperature exhaust filtration in chemical,carbon black, iron and steel, non-ferrous metallurgy, coal-fired boiler, refractory ...