... 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 ... or high temperature exhaust filtration in chemical,carbon black, iron and steel, non-ferrous metallurgy, coal-fired boiler, refractory ...