PTFE (polytetrafluoroethylene)
PTFE (polytetrafluoroethylene) is a high-molecular-weight fluoropolymer that consists entirely of carbon and fluorine atoms. PTFE is best known by the brand name Teflon®.
PTFE Properties
Unsurpassed chemical resistance, only molten alkali metals and a few fluorine-containing compounds at elevated pressures and temperatures will attack its surface
Not affected by any solvents
Ultra-high purity
Exceptional flame resistance, rated UL 94 V-0
Extremely low coefficient of friction
Excellent insulator
Low dielectric constant over a wide frequency range
May be used in food contact applications in compliance with FDA 21 CFR 177.1550
Fillers can enhance PTFE’s mechanical properties
Suitable for outdoor use with no degradation from exposure to the elements
PTFE Applications
When the ability to withstand high temperatures is required, compression-molded and machined PTFE is often used to make seals and other parts for aircraft, rockets and missiles. PTFE is also used to make seals that can withstand cryogenic temperatures.
Because PTFE is chemically inert from cryogenic temperatures to very high temperatures, PTFE is used in components for transferring ultrapure, aggressive fluids, such as seals, valves, laboratory equipment, pipes, liners, fittings, connectors, and pumps. Contaminants will not adhere to the surface of PTFE.
The semiconductor industry uses ultra-pure PTFE for its extreme inertness and wide operating temperature range.
PTFE is one of the best insulating materials and is often used in electrical applications. Because it is non-wettable and absorbs only negligible amounts of water, it retains its high resistivity in damp, polluted environments. Its superior nonstick properties prevent the accumulation of conductive deposits.
The construction industry uses PTFE bearing pads because they resist weather-related degradation.
Virgin PTFE complies with FDA regulations for use in the food, beverage, cosmetics and pharmaceutical industries.