It has the features of strong acid resistance, anti abrasion, smooth, and so on. It is ... calendering, singeing and impregnation, the felt has the features of strong acid resistance, anti abrasion, smooth, and so on. It can ... Weft: <50Working Temperature (oC)Continuous: ≤120; Instant:: ≤140Anti-AcidGreat (including strong sulfuric)Moisture Resistance AATCC100≥4Filter Velocity (m/min)1.5Finishing ...