product no. : 500 ac name: acrylic needle felt weight(g/m2): 500 material: homo-polymer acrylic fiber thickness(mm): 2.0 air permeability(l/m2/s): 150-300 tensile strength: warp:≥800 (n/5×20cm) weft:≥1000 tensile elongation: warp:＜20 (%) weft:＜40 working temp: continuous:140 short time:160 finishing treatment: heat set, glazed one side