... permeability needle felt2.Excellent chemical resistance and hydrolysis resistance3.Widely used in waste incineration, asphalt,dryer,coal mill and ... ,twill,satin construction,any dimension is available. 2.needle felt sieriesMade of polyester,polypropylene,acrilic,PPS,fiberglass,PTFE ... filter bag sieriesMonofilament filter bag, multifilament filter bag,needle punched filter bag,made of pp,pe,pa(nylon ...