... material is coal 2.suitable for making face mask,respirator,and so on the raw material of ... 2mm,it is a ideal material for face mask.which has strong adsorption role.such as ... Benzenes,NHa,formaldehyde,VOC gas,set of filter dust,impurity particles and chemical adsorption dissociate the organic ... indication Property specificationPAN carbon feltPAN graphite feltvolume weight(g/cm3)0.14-0.160.12-0.14Carbon ...