... packing (Balck PTFE packing )consists of PTFE yarn containing graphite panicles. Because in this kind of composite material, both ... a great extent. Owing to good heat conductivity of graphite, working temperature of packing can be increased , hence ... in equipment of foodstuff, pharmaceutic, wine-making, petroleum, chemical, power, paper making, printing and dyeing industries.Temperature:-248~ 300 ° ...