... low temperatures, being corrosion-resistant, non-stick, self-lubricating and insulating. In addition, it has a low friction coefficient. PTFE ... life(1) .In chemistry industry : usa as sealing element,pipeline,pipe fitting and hight pure agentia household utensils ect(2 ... : use as bridge,tunnel ahead ,large-scale chemical industry pipeline,storage tank supporting bearing slipper.(5).In light textile and ...