DESCRIPTION
25% Glass Filled PTFE has better creep and wear resistance compared to Virgin PTFE, these properties are improved with the addition of a glass filler. This filler improves dimensional stability, slightly raises temperature limitations and improves creep resistance. It is white in colour and very rigid. 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 260°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 +260°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 177.1550 177.2600 178.3570
ALL PRESSURES AND TEMPERATURES ARE SUBJECT TO INDIVIDUAL APPLICATION
TYPICAL PHYSICAL PROPERTIES 25% GLASS FILLED PTFE
|
PROPERTY |
METHOD |
UNITS |
SPECIFICATION |
|---|---|---|---|
| Specific Gravity | ASTM D792 | g/cc | 2230 – 2260 |
| Tensile Strength | ASTM D4894 | MPa | 13 – 18 |
| Elongation | ASTM D4894 | % | 180 – 220 |
| Hardness | ASTM D2240 | Shore D | 60 – 65 |
| Deformation Under Load 140kg/cm² 24hrs @ 23°C | ASTM D695 | % | 10 – 12 |
| Deformation Under Load 140kg/cm² 24hrs @ 150°C | ASTM D695 | % | 13 – 15 |
| Permanent Deformation After 24hrs, relaxation @ 23°C | ASTM D695 | % | 5 – 6 |
| Permanent Deformation After 24 hrs, relaxation @ 150°C | ASTM D695 | % | 8 – 10 |
| Friction Coefficient | ASTM D1894 | 0.15 (Dynamic) | |
| Volume Resistivity | ASTM D257 | Ohm cm | 10 15 |
| Water Absorption | ASTM D570 | % | 0.013 |
| Service Temperature | °C | -200°C / +260°C | |
| Flammability | UL 94 | % | V-0 |
| Melting Point | °C | 325 – 335 |