DESCRIPTION
Virgin PTFE is white in colour and a very rigid material. It has a wide range of applications which makes use of its extreme chemical resistance, low coefficient of friction, excellent insulation properties and thermal stability up to 250°C.
SERVICE
Virtually resistant to all corrosive chemicals – with the exception of fluorine, some flourochemicals and molten alkali metals. Anti-stick and non-flammable. Fatigue resistant (especially in applications which involve flexing or vibrations)
Max recommended temperatures : -200°C to +250°C
These temperature and pressure guides cannot necessarily
be used simultaneously and may not apply to all thicknesses.
APPROVALS/COMPLIANCE
Non-flammable ASTM D635 & D470 Food Safe FDA 175.105 175.300 176.170 176.180 177.1520 177.2600 177.1550 177.2600 178.3570
WARNING
PTFE has poor resistance to gamma radiation. For example, exposure to 70 megarads radiation reduces tensile strength by 50%.
ALL PRESSURES AND TEMPERATURES ARE SUBJECT TO INDIVIDUAL APPLICATION
TYPICAL PHYSICAL PROPERTIES VIRGIN PTFE
|
PROPERTY |
METHOD |
UNITS |
SPECIFICATION |
|---|---|---|---|
| Specific Gravity | ISO 13000-2 | g/cm³ | 2130 – 2180 |
| Tensile Strength | ISO 13000-2 | MPa | >20 |
| Elongation | ISO 13000-2 | % | >200 |
| Hardness | ISO 13000-2 | Shore D | >54 |
| Ball Hardness | ISO 13000-2 | MPa | >23 |
| Compression Strength @ 1% Deformation | KG/cm² | >70 | |
| Deformation under load 140kg/cm² 24hrs @ 23°C | ASTM D621 | % | 10 – 17 |
| Permanent Deformation After 24 hrs, relaxation @ 23°C | ASTM D621 | % | 6 – 7.5 |
| Coefficient of static friction | ASTM D621 | 0.08 – 0.10 | |
| Coefficient of dynamic friction | ASTM D621 | 0.06 – 0.08 | |
| Thermal Conductivity | ASTM D621 | W / m.K | 0.24 |
| Dielectric Constant (Ɛ) At 60Hz to 2Ghz | ASTM D621 | % | 2.1 |
| Dielectric Strength | ASTM D621 | KV/mm | 20 – 70 |
| Volume Resistivity | ASTM D621 | Ohm cm | 10 18 |
| Flammability | ASTM | VE-0 | |
| Water Absorption | ASTM D621 | % | 0.01 |