... white OE level 4. for air filter Heat melt filter non-woven, is applicable for automotive environmental protection filter. Specification of ... /(Ventilation Property)more than 1400L/m2·sGB/T5453-1997(Dust Holding)more than 480g/m2 /(Pore diameter)130-160μmGB/ ... 1997, Holy Chemical Fibre Product Factory was founded, produce Acupuncture Non Woven. •2001, Relocated to Huangjiang Town, Dongguan City and ...