... 3.ISO 9001:2008 Needle punched nonwoven acrylic dust filter bag 1.Performance: 1)excellent chemical resistance and ... felt sieriesMade of polyester,polypropylene,acrilic,PPS,fiberglass,PTFE,P84,Nomex, GLT and milter. 3.dust filter bag ... sieriesMade of needle felts as listed in 2 4.liquid filter bag sieriesMonofilament filter bag, multifilament filter bag,needle punched filter bag, ...