... PPS fiber/ PPS long thread scrim4) Thickness (mm):1.8mm5) Air Perm. : 12m3m2/min6) Warp tensile strength: >1200N/5x20cm Weft ... , Teflon coating and membrane PPS is one of the best filter materials with the properties of anti -acid, anti-alkali, ... can finish them with water - oil repellent treatment, PTFE membrane treatment,fabric colth-upin bag types PPS(Ryton) needle felt, filter cloth, filter bags