feature:1.its raw material is coal 2.suitable for making face mask,respirator,and so on the raw material of activated carbon mask cloth is coal,it is very thin ,we can do the thick to 0.2mm,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 waste gas. ...