Let us learn the PTFE (Teflon®) material!!
Teflon® is called "Plastic King". The father of fluororesin, Roy Planck, began researching Freon's substitutes in DuPont in 1936. They collected some of the tetrafluoroethylene stored in cylinders and prepared for the second. The next experiment was carried out, but when the cylinder pressure reducing valve was opened the next day, there was no gas overflow. They thought it was leaking. However, when the cylinder was weighed, it was found that the cylinder did not lose weight. They saw the cylinder and found a lot of white powder, which is Teflon.
They found that Teflon® is excellent in nature and can be used as an anti-fuse sealing gasket for atomic bombs, shells, etc., so the US military kept the technology secret during World War II. It was not until the end of World War II that it was declassified and industrialized production of Teflon was achieved in 1946.
It is a polymer compound formed by polymerization of tetrafluoroethylene. Its structure is simple -[-CF2-CF2-]n-, which has excellent chemical stability and corrosion resistance. It is the most corrosion resistant in the world today. One of the best materials, in addition to molten alkali metal, chlorine trifluoride, chlorine pentafluoride and liquid fluorine, can withstand all other chemicals, boiling in aqua regia does not change, widely used in various needs of anti-acid and organic In the case of solvents. Sealed, highly lubricated and non-tacky, electrically insulating and good anti-aging ability, excellent temperature resistance (can work for a long time at temperatures from 250 ° C to minus 180 ° C). Teflon itself is not toxic to humans.
Use temperature -190 ~ 250 °C, allow quenching and rapid heat, or alternate operation between hot and cold.
Pressure -0.1～6.4Mpa (full negative pressure to 64kgf/cm2) (Full vacuum to 64kgf/cm2)
Its production solves many problems in the chemical, petroleum, pharmaceutical and other fields. PTFE seals, gaskets, gaskets. PTFE seals, gaskets, and gaskets are molded by suspension polymerization of polytetrafluoroethylene resin. Teflon is chemically resistant compared to other plastics and has been widely used as a sealing material and a filling material.
The dispersion can be used as an insulating immersion liquid for various materials and an anticorrosive coating for metal, glass, ceramic surfaces, and the like. Various PTFE rings, polytetrafluoroethylene gaskets, and PTFE packings are widely used in various types of anti-corrosion pipe flange seals. In addition, it can also be used for spinning, PTFE fiber - fluorocarbon (foreign trade name is Teflon).
Nowadays, all kinds of plastic king products have played a pivotal role in the national economy, such as chemical industry, machinery, electronics, electrical appliances, military industry, aerospace, food processing, environmental protection and bridges.
Polytetrafluoroethylene (PTFE) conditions for use in chemical, petrochemical, refining, chlor-alkali, acid, phosphate, pharmaceutical, pesticide, chemical fiber, dyeing, coking, gas, organic synthesis, non-ferrous smelting, steel, atomic energy and polymer filtration materials Production of high-purity products (such as ion-exchange membrane electrolysis), transportation and operation of viscous materials, and food processing and production departments with strict requirements for hygiene.
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