PTFE is a tetrafluoroethylene polymer  with unique physical and chemical features, as listed below, that are excluded to other plastic materials:

- extreme chemical inertia;

- no moisture absorption and maximum resistance to solvents

- excellent heat resistance;

- very good resistance to ageing;

- very good dielectric properties;

- self-lubricating properties and very low friction coefficient;

- suitability for contact with foodstuffs.

PTFE is inert to basically all known chemical reagents.

It is only attacked by alkaline metals in elementary state, by chlorine trifluoride and by elementary fluorine at high temperatures and pressures. PTFE is insoluble in almost all solvents at temperatures up to about 300°C. Only at temperatures close to the crystalline melting point may some highly fluorinated oils cause the PTFE to swell and to melt.

PTFE has a low thermal transmittance value, so it can be considered as thermally stable.

It is not flammable and it is stable for an indefinitely long time up to 260 °C.

PTFE has excellent dielectric properties across a large range of temperatures and frequencies.

As the material basically does not absorb water, its properties stay unaltered even after prolonged exposure to weathering.

The dielectric strength is not practically affected by the working temperature.

The arc resistance of PTFE is remarkable and the action of the arc does not cause charring and only generates non-conductive vapours. Its electric properties too (e.g. relative permittivity, surface resistivity, volume resistivity, power factor, etc.) are particularly interesting.

Please note that, at temperatures between 19 °C and 21 °C, the material has a transition point that is determined by a change in its crystalline structure which causes a variation of approx. 1% in volume. Other peculiar features of PTFE include the non stick action and the low friction coefficient, especially with quite high loads.