PTFE is a unique thermoplastic and is resistant to almost all corrosive chemicals, except for alkali metals. It has the lowest coefficient of friction of all materials and a slippery surface to which no substances will adhere. It is the perfect material for environments where the use of lubricants is not desirable. PTFE has the widest working temperature range of all plastics, from -270°C to 260°C, and is excellent for use in cryogenic applications as it shows no brittleness. PTFE has very good sealing properties and is not flammable unless in a 94% oxygen environment.Properties:
- Chemically inert.
- Insoluble in all known solvents below 300 °C.
- High thermal stability, continuous service temperature range (-270 °C to 260 °C).
- Low coefficient of friction.
- Outstanding electrical and dielectric properties.
- Resistant to stress cracking and weathering.
- Limited use in structural components because of low modulus of elasticity.
- Poor wear resistance.
- Poor mechanical strength.
- Non-toxic EU and FDA approval for food contact applications.
- Very high specific gravity.
- Easy to machine.
Note: Virgin - Unfilled PTFE is not ideal in high wear abrasive applications or in high loading applications.Applications:
Mechanical seals, gaskets, packing’s, electrical insulators, bridge bearing pads, chemical bellows, vee rings, valve seats, spiral back-up rings, ball valve seats and seals, expansion bearings, chemical transfer tubing, linings and coatings, glandless
valves and pumps, laboratory equipment.