PPS – BEARING GRADE (POLYPHENYLENE SULFIDE)
Material Information
PPS (PolyPhenylene Sulfide) is a semi-crystalline engineering thermoplastic. It offers the broadest resistance to chemicals of any advanced engineering plastic. There are no known solvents that effect PPS under 392º F, and it is inert to steam, strong bases, fuels, and acids. It is ideal for precise tolerance machined components because it has minimal water absorption, has a very low coefficient of linear thermal expansion, and is stress relieving manufactured. PPS is also a great option for structural applications, corrosive environments, and a lower temperature replacement for PEEK. At moderate temperatures PPS offers great dimensional stability and strength.
The bearing grade of Quadrant PPS is internally lubricated, carbon fiber reinforced, and compression molded. It offers a low coefficient of thermal expansion with uncompromised chemical resistance. It is a great option for wear applications that require an electrically conductive material.
Application
- Lantern rings
- Aerospace applications
- Pump housings
- High-pressure liquid chromatography components
- Water retaining rings
- Hydrocarbon pump, valve, and compressor components
- Oil field parts
- Medical and diagnostic device parts
- Electronic test sockets and fixtures
- Flow meter rotors
- Engine sensors
- Halogen lamp sockets
Properties
- Broadest resistance to chemicals of all advanced engineering plastics
- Self-lubricated
- Electrically conductive
- Inert to steam, strong bases, fuels, and acids
- Minimal water absorption
- Very low coefficient of linear thermal expansion
Physical |
Astm Test Method |
Bearing Grade PPS |
| Density (lb/in^3) | D792 | 0.056 |
| Specific Gravity | D792 | 1.55 |
| Water Absorption @ 24 hours (%) | D570 | 0.02 |
Mechanical |
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| Tensile Strength (PSI) | D638 | 10,000 |
| Tensile Modulus (PSI) | D638 | 800,000 |
| Tensile Elongation at Break (%) | D638 | 1.5 |
| Flexural Strength (PSI) | D790 | 15,000 |
| Flexural Modulus (PSI) | D790 | 1,000,000 |
| Compressive Strength (PSI) | D695 | 15,000 |
| Compressive Modulus (PSI) | D695 | 800,000 |
| Izod Impact (Notched), ft-lb/in | D256 | M93, R126 |
| Rockwell Hardness | D785 | 1 |
Thermal |
||
| Coefficient of Thermal Expansion, 10^-5/°F |
D696 | 1.7 |
| Heat Deflection Temperature 264 psi, ºF | D648 | 490 |
| Glass Transition Temp, ºF | D3418 | NA |
| Continous Service Temp (Operating), °F | – | 450 |
| Thermal Conductivity, BTU-in/hr-ft² °F | C177 | 2.2 |
| Flammability Rating | UL94 | VO |
Electrical |
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| Dielectric Strength, Short Term, (Volts/Mil) @ .125″ Thick |
D149 | – |
| Volume Resistivity (ohm-cm) @ 50% RH | D257 | – |
| Dielectric Constant at 1 MHz | D150 | – |
| Dissipation Factor at 1 MHz | D150 | – |
NOTE:
The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.