PPS
Also available: PPS Glass Filled
PPS is a semi-crystalline high performance thermoplastic with optimised tribological properties for demanding bearing and friction requirements.
Key Features:
Very good sliding properties even without lubrication
Good thermal mechanical bearing strength
Good chemical and hydrolysis resistance even against superheated steam
Very wear resistant
Very rigid
Creep resistant
Not electrically insulating
Good machinability
Resistant to gamma radiation
Self extinguishing V-0
Applications:
Friction bearings, satic / dynamic high bearing strength parts, side shoes, sealing rings, pump housings / parts, wear strips, gears, thrust washers, ball valve seals, slide rings, valve housings.
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 |
1.54 |
| Tensile strength at yield |
MPa |
53455 |
- |
| Tensile strength at break |
MPa |
53455 |
120 |
| Elongation at Break |
% |
53455 |
1.4 |
| Modulus of elasticity in tension |
MPa |
53457 |
12500 |
| Modulus of elasticity in flexure |
MPa |
53457 |
- |
| Ball indentation hardness |
MPa |
53456 |
- |
| Impact strength (Charpy) |
KJ/m² |
53453 |
20 |
| 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 |
- |
- |
0.21 |
| Wear conditions as above |
µm/km |
- |
0.69 |
| Thermal |
- |
- |
- |
| Crystalline melting point |
ºC |
53736 |
285 |
| Glass transition temperature |
ºC |
53736 |
88 |
| Heat distortion temperature method A |
ºC |
ISO 75 |
- |
| Heat distortion temperature method B |
ºC |
ISO 75 |
- |
| Max. service temperature short term |
ºC |
- |
260 |
| Max. service temperature long term |
ºC |
- |
230 |
| Coefficient of thermal conductivity |
W/(m K) |
- |
- |
| Specific heat |
J/(g K) |
- |
- |
| Coefficient of thermal expansion |
10-5/K |
- |
~3 - 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 |
~0.05 |
| Water absorption at saturation at 23ºC |
% |
53495 |
|
| Resistance to hot water, washing soda |
- |
- |
resistant |
| Flamability |
- |
UL 94 |
V-O |
| Resistance to weathering |
- |
- |
resistant |
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