... anti-alkali 2.25 years' experience 3.ISO9001:2008 Nomex needle felt characteristics: high temperature(204-240), anti- ... follows: HZ Filter FeltREF CODE:HZFF-PA-500NAME:Nomex Filter FeltFiber MaterialAramidScrim MaterialAramid staple yarnWeightGSM500ThicknessMM2.1AirpermeabilityL/dm2/min130 ... of polyester,polypropylene,acrilic,PPS,fiberglass,PTFE,P84,Nomex 3.dust filter bag sieriesMade of needle felts ...