... 3.Anti-hydrolysis, acid and alkali 4.ISO:9001 control Needle punching PPS Ryton micron filter bag Composition: imported PPS ... 200 DEG CSpecialty: Anti-abrasion, anti-acid, anti-alkaliPPS compounded needle punched filter felt is one of our high-tech products, using ... PTFE dipping treatment, PTFE coating and so on.PPS compounded needle filter felt usually used for corrosive fume gases filtration and ...