We all know teflon made of rods, tubes, films, bearings, gaskets, valves and other profiles and parts, widely used in machinery, chemical industry, aviation, electrical electronics, national defense industry, cutting-edge technology, medical health and electrical insulation and other fields.Here's more about teflon.
Electrical insulation and chemical properties of teflon
Teflon PTFE has good electrical insulation properties.It has very high resistivity and low dielectric loss, and because teflon PTFE does not absorb or absorb water vapor (does not absorb water or be soaked in water), surface resistivity is high even at 100% relative humidity.This property and its flashover resistance make teflon PTFE particularly suitable for a wide range of applications requiring insulation.Teflon PTFE is chemically stable, which is better than any other elastomer.It does not react with all known acids and bases, including the three strong acids and hydrofluoric acids.Teflon PTFE is impervious to moisture and does not dissolve in any known solvent (but can dissolve in molten alkali metals).Teflon PTFE is non-flammable, non-toxic and emits toxic gases only when heated above 400 ° c.Because of the inert nature of teflon PTFE, it can only be bonded in a special way.The highest working temperature of the adhesive should be noted when bonding.Teflon PTFE can be used for high speed machining with ordinary tools.When teflon PTFE is sintered and formed by adding different materials (such as graphite, glass fiber, copper powder, etc.), teflon PTFE can be modified, mainly to improve its mechanical and thermal properties.In vacuum technology, teflon PTFE can be used as a seal gasket, a seal for permanent or mobile inlet device, an insulating element and a low-friction moving element.The application temperature range of teflon PTFE is -50 ~ 200℃, and its maximum operating temperature can reach 250℃.
Teflon sealing performance
Teflon is generally used in corrosion-resistant pipelines, containers, pumps, valves, radars, high frequency communication equipment, radio equipment, etc.All kinds of teflon packing, ptfe ring, ptfe gasket, ptfe packing are widely used for sealing various anticorrosive pipe flanges.Use rubber or asbestos MATS for low corrosion.Polishing is generally suitable for hard materials, but for teflon, because it is very soft, and there is self-lubrication, so the polishing effect is not obvious.It is recommended to set up the feed and revolution when turning, and get a better surface roughness.Sealing performance depends on the efficiency and performance of the whole machine.Teflon materials have corrosion resistance, aging resistance, low friction coefficient and viscosity, a wide range of heat resistance, elasticity characteristics make it very suitable for the production of high corrosion resistance, temperature above 100℃ seal.Such as machine, heat exchanger, pressure vessel, large diameter flange seal container, valve, channel pump, glass reactor, plane flange, large diameter flange seal, shaft, piston rod, valve stem, worm gear oil pump, piston rod seal, and so on.
The electrical insulation and chemical properties and sealing properties of Teflon have been described in detail above. For more information, please pay attention to our news.
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