Polytetrafluoroethylene (abbreviated as PTFE), commonly referred to as "non-stick coating" or "easy to clean materials." This material is resistant to acids and bases and to various organic solvents and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is extremely low, so it can be used as a lubricant for lubricating the inner layer of the water pipe.
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 for anti-fuse gaskets 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.
Chinese trade names "teflon" (teflon), "Teflon", "Teflon", "Teflon" and so on. 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, boil 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.
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