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PTFE

Although PTFE is classed as a thermoplastic, it is not processed by conventional moulding or extrusion but by sintering PTFE powder compacted to the required shape under pressure.

Applications generally exploit one or more of its unusual combination of properties; resistance to high temperatures, resistance to low temperatures, low loss dielectric properties over a wide frequency range, chemical inertness and antistick properties.
The most well-known examples of its use include non-stick cookware (non-stick Teflon coated frying pans were introduced for Christmas 1961) and plumbers' thread tape.

Due to its low friction, it is used for applications where sliding action of parts is needed: bearings, bushings, gears, slide plates, etc. PTFE's low frictional properties have also been utilized as computer mice feet such as the Logitech G5 and Logitech G7 computer mice series from Logitech or most Razer gaming mice (e.g the Deathadder, Lachesis). The low-friction provided by PTFE allows the mice to be moved and glide across surfaces smoothly and with less effort.
Because of its chemical inertness, PTFE cannot be cross-linked like an elastomer. Therefore it has no "memory," and is subject to creep (also known as "cold flow" and "compression set"). This can be both good and bad. A little bit of creep allows PTFE seals to conform to mating surfaces better than most other plastic seals. Too much creep, however, and the seal is compromised. Compounding fillers control unwanted creep, as well as to improve wear, friction, and other properties. Sometimes metal springs apply continuous force to PTFE seals to give good contact, while permitting some creep.