We supply high quality needle felt for filter bags This is PP needle felt nonwoven fabric fabric for filter bags Detailed Product Description Features: 1) Material: polypropylene 2) Weight: 500gsm 3) Thickness: 2.2mm 4) Tensile strength (n/5 x 20cm): a) Warp: 1,000 b) Weft: 1,100 5) Tensile elongation: a) Warp: <35% b) Weft: <55% 6) Permeability (10-3m3/m2.S): 150 - 200 7) Working temperature (oC): a) Continuance: 120 b) Instant: 150 8) Surface treatment: singeing, calendaring