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What are the characteristics of polytetrafluoroethylene (PTFE)

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What are the characteristics of polytetrafluoroethylene (PTFE)

  • Categories:Industry news
  • Author:Miss PTFE tube
  • Origin:Miss PTFE tube
  • Time of issue:2021-07-20 13:54
  • Views:

What are the characteristics of polytetrafluoroethylene (PTFE)

  • Categories:Industry news
  • Author:Miss PTFE tube
  • Origin:Miss PTFE tube
  • Time of issue:2021-07-20 13:54
  • Views:
What are the characteristics of polytetrafluoroethylene (PTFE)
 
      Polytetrafluoroethylene, English name: Polytetrafluoroethylene, referred to as FTFE or F4. Polytetrafluoroethylene is a polymer of tetrafluoroethylene. Polytetrafluoroethylene (Teflon or PTFE), commonly known as "Plastic King", was invented in 1938.
 
      The C-C bond is covered by the F atom in the PTFE molecule, and the C-F bond bond is highly stable, and it is not corroded by any chemicals except for alkali metals and fluorine.
      The F atom in the PTFE molecule is symmetrical, and the two elements in C-F are covalently combined. There are no free electrons in the molecule, and the whole molecule is neutral. Make PTFE have excellent dielectric properties. Because there is an inert fluorine-containing shell outside the PTFE molecule, it has outstanding non-stick performance and low friction coefficient.
      PTFE has outstanding excellent comprehensive properties, high temperature resistance, corrosion resistance, non-stick, self-lubricating, excellent dielectric properties, and a very low coefficient of friction. By adding any filler that can withstand the sintering temperature of PTFE, its mechanical properties can be greatly improved. At the same time, other excellent properties of PTFE are maintained. Filled varieties include glass fiber, metal, metal oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL... etc. The wear resistance and limit PV value can be increased by 1000 times.
      PTFE has excellent chemical stability, corrosion resistance, airtightness, high lubrication and non-stick properties, electrical insulation and good aging resistance. It can work for a long time at a temperature of +250°C to -180°C. Except for molten sodium and liquid fluorine, it can withstand all other chemicals, and it will not change when boiled in aqua regia.
 
PTFE engineering plastics can be made into PTFE tubes, rods, belts, plates, films, etc. Generally used in corrosion-resistant pipelines, containers, pumps, valves, radar, high-frequency communication equipment, and radio equipment with high performance requirements. The dispersion can be used as the insulating dipping solution for various materials and the anticorrosive coating on the surface of metal, glass, and ceramics. Various PTFE rings, PTFE gaskets, PTFE packings, etc. are widely used for sealing various anticorrosive pipeline flanges. In addition, it can also be used for spinning, PTFE fiber-fluorine fiber (foreign trade name is Teflon).
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Next: How to calculate the heating ring power of PFA Tube extruder

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