... ISO 9001:2008 100% Acrylic nonwoven needle punched felt 1.Good air permeability needle felt2.Excellent chemical resistance and hydrolysis resistance3 ... ,PTFE,P84,Nomex 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,made of pp,pe,pa(nylon),the ...