... ,aramid,P84,acrylic,PPS,PTFE and all compound needle punched filter felt.2) Can do all kinds of filter bags for liquid,and air filters ... according to customers' requirements,such as polyester,polypeopylene,aramid,acrylic,P84,PPS,PTFE and compound filter felt ... and steel,non-ferrous metallurgy,coal-fired boiler,refractory and cement industries