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What are the performance characteristics of PTFE balls


PTFE ball Teflon ball application The Chinese name of t […]

PTFE ball Teflon ball application
The Chinese name of the PTFE ball is polytetrafluoroethylene ball, also called Teflon ball, and its English name is Teflon.
PTFE emulsion is a kind of polytetrafluoroethylene polymer chemical material, it is widely used in packaging, electronic and electrical, chemical energy, corrosion-resistant materials. PTFE, Teflon, and PTFE coatings are high-performance coatings that combine heat resistance, chemical inertness, excellent insulation stability, and low friction, and have comprehensive advantages that other coatings can’t compete with. Its application flexibility It can be used for almost all shapes and sizes of products.
PTFE ball Teflon ball production method
PTFE balls, PTFE balls, and Teflon balls are produced by radical polymerization of tetrafluoroethylene. Industrial polymerization is carried out under agitation in the presence of a large amount of water to disperse the heat of reaction and facilitate temperature control. The polymerization is generally carried out at 40-80°C and a pressure of 3-26 kg/cm2. Inorganic persulfate and organic peroxide can be used as initiators, or a redox initiation system can be used. 171.38kJ of heat is released during polymerization of tetrafluoroethylene per mole.
Performance characteristics of PTFE ball, PTFE ball, Teflon ball:
Polytetrafluoroethylene ball, PTFE ball, Teflon ball is a polymer polymerized from tetrafluoroethylene monomer. It is a transparent or opaque wax-like substance similar to PE. Its density is 2.2g/cm3, and it absorbs water. The rate is less than 0.01%. Its chemical structure is similar to PE, except that all hydrogen atoms in polyethylene are replaced by fluorine atoms. Due to the high bond energy and stable performance of the CF bond, it is resistant to chemical corrosion and can withstand all strong acids (including aqua regia) except molten alkali metals, fluorinated media, and sodium hydroxide above 300 ℃. The role of an oxidizing agent, reducing agent, and various organic solvents; the F atom in the PTFE molecule is symmetrical, and the two elements in the CF bond are covalently bonded. There are no free electrons in the molecule, making the whole molecule neutral, so it has excellent mediation. Electrical performance and its electrical insulation is not affected by the environment and frequency. Its volume resistance is greater than 1017 Km, has low dielectric loss, high breakdown voltage, good arc resistance, and can work in an electrical environment at 250 ℃; because there is no hydrogen bond in the molecular structure of PTFE, the structure is symmetrical. The crystallinity is very high (generally 55%~75%, sometimes as high as 94%), which makes PTFE excellent in heat resistance. Its melting temperature is 324 ℃, decomposition temperature is 415 ℃, service temperature is 250 ℃, embrittlement The temperature is -190 ℃, and the heat distortion temperature (under 0.46MPa) is 120 ℃. Teflon, Teflon, and PTFE have good mechanical properties. Their tensile strength is 21~28MPa, bending strength is 11~14MPa, elongation is 250%~300%, and the coefficient of dynamic and static friction against steel is 0.04. The coefficient of friction is smaller than that of nylon, polyoxymethylene, and polyester plastics.