Specifications: pps needle felt 's temperature is 190 degree to 220 degree, which is the best filter media for anti -acid, anti-alkali, hydrolysis resistant, but it is not so good at anti -oxidant, and applied in waste inicinerator, electric station boiler, industrial boiler, etc. Detailed Product Description Features: 1) Material: PPS fiber 2) Weight: 450gsm 3) Thickness: 1.2mm 4) Tensile strength (n/5 x 10cm): a) Warp: 800 b) Weft: 1,000 5) Tensile elongation: a) Warp: <40% b) Weft: <60% 6) Permeability (10 - 3m3/m2S): 150 - 350 7) Working temperature (oC): a) Continuance: 190 b) Instant: 220 8) Surface treatment: singeing, calendering, heat setting