PPS – BEARING GRADE (POLYPHENYLENE SULFIDE)

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

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

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.