... In normal temperature circumstance(under 150 C), the polyester needle felt will satisfy the bag filter systems, if the ... in the gas/fume, the acid dew will exist. Aramid needle felt, besides equip the ability of spinnability, abrasion resistance, ... aramid fiber will carbonization gradually. Besides, aramide fiber also with a good dimensional stability, long service life. Aramid(Nomex) needle felt ...