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    Polytetrafluoroethylene is called “plastic king”. Roy plancott, the father of fluororesin, began to study the substitutes of freon in DuPont company in 1936. They collected part of tetrafluoroethylene and stored it in the steel cylinder for the next experiment the next day. However, when the pressure reducing valve of the cylinder was opened the next day, no gas overflowed. They thought it was a gas leak, but weighed the cylinder. It was found that the cylinder did not lose weight. They saw through the cylinder and found a lot of white powder. This is polytetrafluoroethylene.
    Their research found that polytetrafluoroethylene has excellent properties and can be used as a fusion proof sealing washer for atomic bombs, shells, etc., so the U.S. military kept the technology secret during World War II. It was not until the end of World War II that it was declassified, and polytetrafluoroethylene was industrialized in 1946.Wholesale PTFE Washers