1.Blended polyester anti-static needle punched felt During the production, we proportionally add electric conduction or antic- static fiber to needle punched felt. It is prevalent in the world at present. It generally adopts the carbon fiber or the stainless steel fiber. material Polyester fiber + anti-static filter weight(g/m2) 500 thickness(mm) 1.80 Air permeability(m3/m2/min) 15 Breaking strength warp &#8805;1000 weft &#8805;1100 elongation warp &#8804;35 weft &#8804;40 Constant working temperature(&#8451;) 130 Instant working temperature(&#8451;) 150 finishing treatment : Singed, calendering Surface electric-resistance (&#937;) < 10E5 Volume electric-resistant (&#937;) < 10E5 Friction voltage (V) < 500 surface density (&#956;C/m2) < 7 Half life (S) < 1 Acid resistant : common Alkali resistant : inferior Abrasion resistant : excellent Hydrolyze stability : inferior 2.Basic scrim anti-static needle punched felt It adopts the anti-static woven fabric for scrim. While weaving scrim, we add the conductive fiber in the warp direction to make the base scrim enable anti-static function. After forming needle punched felts, this function that can be extended to the felt. Our factory generally adopts the conductive fiber of stainless steel. This type is economical. material : Polyester + anti-static scrim weight (g/m2) 500 thickness(mm) 1.80 Air permeability (m3/m2/min) 15 Breaking strength warp &#8805;1000 weft &#8805;1100 elongation warp &#8804;35 weft &#8804;40 Constant working temperature (&#8451;) 130 Instant working temperature (&#8451;) 150 finishing treatment :calendering Surface electric-resistance (&#937;) < 10E10 Volume electric-resistant (&#937;) <10E9 Friction voltage(V ) < 500 Surface density (&#956;C/m2) < 7 Half life (S) < 1 Acid resistant : common Alkali resistant : inferior Abrasion resistant : excellent Hydrolyze stability : inferior