... of 250 ° C.(3) Low temperature - low resistance with good mechanical toughness; even if the temperature dropped to -196 °C, ... the surface of the metal, glass, pottery, anti-corrosion layers. Various PTFE rings, PTFE gaskets, PTFE packing is widely used in ... addition, can also be used for spinning, the PTFE fiber - Teflon (foreign trade name Teflon). Chemical, petrochemical, oil refining, chlor-alkali, ...