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Home / News / What is the difference between PTFE polytetrafluoroethylene and ePTFE expanded tetrafluoroethylene?

PTFE polytetrafluoroethylene: a polymer compound made by polymerization of tetrafluoroethylene, has excellent chemical stability and corrosion resistance, is one of the best corrosion resistance materials in the world today, except for molten alkali metals and trifluoro In addition to chlorine chloride, chlorine pentafluoride and liquid chlorine, it is resistant to all other chemicals, and it does not change when it is boiled in aqua regia. It is widely used in various occasions requiring acid and alkali resistance and organic solvents. It has sealing, high lubricity and non-stickiness, electrical insulation, good aging resistance, and excellent temperature resistance (can work for a long time at a temperature of positive 250 ℃ to negative 180 ℃). PTFE itself is not toxic to humans. The use temperature is -190 ~ 250 ℃, allowing rapid cooling and rapid heating, or alternating cooling and heating operation. Pressure -0.1 ~ 6.4Mpa.
Scope of application:
Polytetrafluoroethylene (PTFE) is suitable for industries such as chemical, petrochemical, oil refining, chlor-alkali, acid production, phosphate fertilizer, pharmaceuticals, pesticides, chemical fiber, dyeing, coking, coal gas, organic synthesis, non-ferrous smelting, steel, atomic energy and polymer filter materials, Production of high-purity products (such as ion-exchange membrane electrolysis), transportation and operation of viscous materials, and highly strict food and beverage processing and production departments. Various Teflon gaskets, Teflon gaskets, Teflon packings, etc. are widely used for sealing all kinds of anti-corrosion pipeline flanges.
ePTFE expanded tetrafluoroethylene: it is expanded or stretched polytetrafluoroethylene, which has the sealing property of polytetrafluoroethylene, and at the same time improves the "cold flow" of polytetrafluoroethylene (that is, the material product is continuously loaded for a long time) Plastic deformation (creep) under the action). Because of its multi-directional stretch fiber structure. Give it excellent longitudinal and lateral stability, while minimizing the cold deformation and compression creep of the material, especially suitable for large pressure vessels, large diameter and uneven surface tubular heat exchangers, large plate heat exchangers 1. Large-scale glass-lined reactor. Use temperature -240 ~ 270 ℃, maximum 315 ℃, pressure: vacuum 40bar, can contact with food. Softer than ptfe material, rollable material, lighter than ptfe material.

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