1. Micro pore structure. 2. Enhanced collection efficency. 3. Improved dust ... a good acid and alkali resistance, and good oxidation resistance.Data Sheet: Item NameP84 Needle FeltCompositionsP84 fiber / P84 scrimWeight (g/m2) ... -AlkaliGoodAnti-AbrasionGoodFilter Velocity (m/min)1.5Finshing Treatmentheat setting, singeing, calendering, coating etc. Remarks: All data expressed as typical values. The ...