... . 1) Material: polyester, polypropylene, PPS, PTFE and all compound needle punched filter felt.2) Can do all kinds of filter ... 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 and cement industries.