PTFE is the best-known chemically-resistant polymer. Only very few chemicals react to PTFE, and it is resistant to oxygen, ozone and UV light. This polymer has excellent thermal and electrical insulation properties and a minimal friction coefficient. Its mechanical properties are less resistant compared to other high-performance polymers. They can, however, be vastly improved by the addition of filling materials such as glass fiber, carbon and graphite. PTFE has almost perfect electrical properties. Its dielectric constant is minimal (2.1) as is its dielectric loss factor (0.0002), and this remains the case over a wide range of temperatures and frequencies. PTFE does not burn at an open flame, but degenerates above the continuous operating temperature.
Examples of how PTFE is used include:
apparatus construction and linings, fixture linings, foils, high-pressure hoses with reinforcements, isostatic pressed parts, lab equipment and accessories, composite bearings and cable coating.
Operating temperature: -200 to +260°C
Melting temperature: +322 to +342°C