PTFE - Polytetrafluoroethylene

Polytetrafluoroethylene or PTFE, popularly known by its trade names as Teflon, Fluon, Algoflon, Hostaflon, is the most important fluorinated material. Due to its high-viscosity mass (melting point >327 °C) it is unable to be processed with the most common methods used with thermoplastic materials.

Polytetrafluoroethylene is available on the market as:

  • Polymer powder, which is produced from the polymerisation process in suspension for a compression moulding, sintering and RAM extrusion
  • Polymer powder in emulsion (for the extrusion of 'doughs')
  • Dispersion for applications in coatings
  • Primer or additive in other plastic materials, in order to reduce sliding friction.

 

FEATURES

  • Less stiff and solid
  • Operating temperature range: from -270 °C to 300 °C
  • Embrittlement only at temperatures lower than -260 °C
  • Universal chemical stability
  • Insolubility with all solvents known at lower than 300 °C
  • Resistance to atmospheric agents without stabilisation
  • Excellent electric and dielectric features
  • A very good anti-adhesive behaviour and sliding of all materials
  • Wear-resistance is not so good, but it can be improved by adding (from 5 to 40% of volume) graphite, E-carbon, bronze, iron, MoS2 or glass fibres.

 

SOME FIELDS OF APPLICATION

  • Seals subject to static and dynamic stresses
  • Bellows, pistons and other parts of machines
  • Coatings and linings
  • Supports for printed circuits
  • Films and others