PTFE - Teflon
PTFE is an infusible material and starts to melt in a temperature of 327°C. Due to the uniquely low free surface energy PTFE has good lubrication properties, and furthermore is resistant to chemicals, both organic and non-organic.
APPLICATION FIELDS: linings for chemical equipment, pipes and fittings for equipment operating in extreme conditions, sealing materials, medicine (e.g. implants), parts for pumps and equipment, electrotechnology.
| Properties | Unit | Value | Test method |
| General properties | |||
| Density | g/cm3 | 2,18 – 2,20 | DIN 53479 |
| Flammability according to UL standard | grade | V 0 | UL 94 |
| Resistance to weather conditions | - | resistant | - |
| Mechanical properties | |||
| Elongation at break (yieldpoint) | % | 190 - 350 | EN ISO 527 |
| Ball indentation hardness, 30 sec. value (135 N) | N/mm2 | 25 - 30 | EN ISO 2039-1 |
| Shore-D hardness | - | 55 - 59 | EN ISO 868 |
| Yield point | MPa | 20 | DIN 53455 |
| Tensile strength | kj/m2 | 16 | DIN 53455 |
| Modulus of elasticity at break | MPa | 700 | DIN 53457 |
| Grindability | µm/km | 21 |
- 4120 = 100 |
| Thermal properties | |||
| Scope of operation temperatures | ° | -200 - +260 | - |
| Melting point | ° | 327 | DIN 53736 |
| Heat distortion temperature (HDT A process) |
° | 55 | ISO-R 75 / DIN 53461 |
| Heat distortion temperature (HDT B process) |
° | 121 | ISO-R 75 / DIN 53461 |
| Short-term operation temperature | ° | 290 | - |
| Thermal conductivity at 23°C | W/(K*m) | 0,21 | - |
| Coefficient of linear expansion, at length (23°C) |
10-5 1/K | 16 | - |
| Electrical properties | |||
| Volume resistivity | Ohm*cm | 1017 | DIN 53482 / VDE 0303/3 |
| Surface resistance | Ohm | 1015 | DIN 53482 |
| Dielectric strength | kV/mm | 50 | DIN 453482 / VDE 0303/2 / IEC-243 |
| Dielectric constant (10 MHz) | - | 2,1 | DIN 53483 / IEC-250 |