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PTFE Rod Physically Inert

Yangzhong Tianyou Seals Co.,Ltd | Updated: Nov 01, 2017

PTFE Rod Physically inert

Teflon bar is an uncoated polytetrafluoroethylene resin suitable for the processing of various gaskets, seals and lubricating materials working in corrosive media and electrically insulating parts used at various frequencies. (Which may contain recycled polytetrafluoroethylene resin) by molding, paste extrusion or plunger extrusion process of forming the bar, then, in use, what advantages of PTFE rods?

1, no adhesion: no adhesion to any substance;

2, greatly improve the service life, long-term use than glass products more economical;

3, resistance to extreme temperature: to + 260 ℃ to -180 ℃ temperature long-term work;

4, non-toxic: with a physical inertia, can be implanted in the human body, harmless to the human body;

5, corrosion resistance: strong acid, alkali, aqua regia and a variety of organic solvents; in addition to molten metal sodium and liquid fluoride, the ability of all other chemicals, boiled in the water can not afford to change; in fluorine plastic, Fluoride consumption of the largest, the most widely used, it is an important species of fluorine plastic. The chemical structure of polytetrafluoroethylene is to replace all the hydrogen atoms in the fluorine atom with fluorine atoms. Polytetrafluoroethylene was called "Plastic King", the father of fluororesin Roy Prycote 1936 DuPont in the United States began to study the replacement of freon, they collected some of the tetrafluoroethylene stored in the cylinder, ready for the second Day for the next experiment, but when the next day to open the cylinder after the valve, but no gas spill, they thought it was leak, but the cylinder weighing, found that the cylinder did not lose weight. They saw the cylinder and found a lot of white powder, which was polytetrafluoroethylene.

They found that PTFE has excellent properties and can be used in atomic bombs, shells and other anti-fissure gasket, so the US military will be the technology during World War II has been kept confidential. Until the end of World War II, only to decrypt, and in 1946 to achieve industrial production of polytetrafluoroethylene. Polytetrafluoroethylene, commonly known as "plastic king", is made of polytetrafluoroethylene polymer compounds, with excellent chemical stability, corrosion resistance, sealing, high lubrication non-stick, electrical insulation and good resistance Aging endurance. Used as engineering plastics, can be made of polytetrafluoroethylene ptfe tube, rod, belt, plate, film and so on. Polytetrafluoroethylene ptfe powder with domestic materials and imported materials, on their latest price of PTFE please consult permanent seals. Polytetrafluoroethylene has a relatively high molecular weight, a low number of hundreds of thousands, a height of more than 10 million, typically millions (polymerization degree of 104 orders of magnitude, and polyethylene only at 103). Generally, the crystallinity is 90 to 95% and the melting temperature is 327 to 342 ° C. The CF2 units in the polytetrafluoroethylene are arranged in a zigzag shape. Since the radius of the fluorine atom is slightly larger than that of the hydrogen, the adjacent CF2 units can not be completely cross-oriented, but form a helical twisted chain with almost fluorine atoms The entire surface of the polymer chain. This molecular structure explains the various properties of polytetrafluoroethylene. When the temperature is below 19 ° C, a 13/6 helix is formed; a phase change occurs at 19 ° C and the molecule is slightly unfastened to form a 15/7 helix.