Material:polyacrylonitrile fiber Density:1.65-1.75g/cm3 Carbon content:> ... powder are based on the polyacrylonitrile fiber as the raw material.Via the special surface treatment, mechanical grinding, sieving and drying ... industries (paint, floors, coating, ink),anti-static filter, defense industry, building insulation, chemical,motorcycle muffler, paint drying room air filters, PTFE and ...