PTFE Carbon Filled
PTFE has proor creep and wear resistance. These properties can be improved with the addition of a carbon filler. This filler improves dimensional stability, riases the heat deflection temperature, improves creep resistance and the dynamic bearing performance.
Carbon Filled PTFE - Main Characteristics:
Extremely good chemical resistance against virtually all media
Wide temperature range (-260ºC to +250ºC)
Good sliding properties
Improved dimensional stability
Improved creep resistance
Partial electrical conductivity - antistatic
Black in colour
The preferred fields for the use of Carbon Filled PTFE are: chemical engineering, machine parts, transport and conveyor technology, pump and instrument construction, electrical industry, electronics, laser technology, fume purification, pure water production, cryogenics, filter technology, food and medical technology.
Carbon Filled PTFE - Applications:
Pump housings
Valve seats
Gaskets
Roller coverings
Shaft bearings
Filter housings
Etching plates
Shaft Seals
Slide runners
Technical Information:
Information to be used as a guide only. It corresponds with our current knowledge and indicates possible applications. We cannot guarantee suitability for a specific application. Unless otherwise stated these values represent averages taken from injection moulded samples.
| Properties |
Unit |
Test Method DIN ASTM |
Result |
| Mechanical |
- |
- |
- |
| Density |
g/cm³ |
53479 |
2.10 - 2.15 |
| Tensile strength at yield |
MPa |
53455 |
12-15 |
| Tensile strength at break |
MPa |
53455 |
- |
| Elongation at Break |
% |
53455 |
100-150 |
| Modulus of elasticity in tension |
MPa |
53457 |
395-560 |
| Modulus of elasticity in flexure |
MPa |
53457 |
- |
| Ball indentation hardness |
MPa |
53456 |
- |
| Impact strength (Charpy) |
KJ/m² |
53453 |
- |
| Creep rupture strength after 1000 hours with static load |
MPa |
- |
- |
| Time yield limit for 1% elongation after 1000 hours |
MPa |
- |
- |
| Coefficient of friction against hardened and ground steel p+0,05 N/mm2, v=0,6 m/s |
- |
- |
- |
| Wear conditions as above |
µm/km |
- |
- |
| Thermal |
- |
- |
- |
| Crystalline melting point |
ºC |
53736 |
327 |
| Glass transition temperature |
ºC |
53736 |
- |
| Heat distortion temperature method A |
ºC |
ISO 75 |
5.5 |
| Heat distortion temperature method B |
ºC |
ISO 75 |
121 |
| Max. service temperature short term |
ºC |
- |
290 |
| Max. service temperature long term |
ºC |
- |
250 |
| Coefficient of thermal conductivity |
W/(m K) |
- |
0.44 |
| Specific heat |
J/(g K) |
- |
- |
| Coefficient of thermal expansion |
10-5/K |
- |
7.2 - 8.4 |
| Electrical |
- |
- |
- |
| Dielectric constant at 10 (5) Hz |
- |
53483 |
- |
| Dielectric loss factor at 10(5) Hz |
- |
53483 |
- |
| Specific Volume Resistance |
Ωcm |
53482 |
- |
| Surface Resistance |
O |
53482 |
- |
| Dielectric strength 1mm |
kV/mm |
53481 |
- |
| Tracking resistance |
- |
53480 |
- |
| Miscellaneous |
- |
- |
- |
| Moisture Absorption: Equilibrium in standard atmosphere (23ºC / 50% relative humidity) |
% |
53714 |
<0.14 |
| Water absorption at saturation at 23ºC |
% |
53495 |
- |
| Resistance to hot water, washing soda |
- |
- |
resistant |
| Flamability |
- |
UL 94 |
VO |
| Resistance to weathering |
- |
- |
resistant |
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