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PAI

PAI is Widely Used For:

  • Semiconductor machinery parts
  • Chip test sockets
  • Aerospace components
  • Electrical connectors
  • Bearings and bushings
  • Bearing cages
  • Pump and valve parts
  • Seals

Performance Characteristics:

  • Strong and stiff
  • Performs well at elevated temperatures
  • Extremely low thermal expansion
  • Excellent electrical insulating properties (electrical grade)
  • Outstanding bearing and wear properties (bearing grade)
  • Good resistance to many common solvents, fuels, and acids

Common Brands:

  • Tecator
  • Torlon® PAI
  • Duratron® PAI
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PAI

Extremely strong, stiff, dimensionally stable plastic material often used in elevated temperature environments

PAI (polyamide-imide) is an extremely strong and stiff plastic material. It is often used in elevated temperature environments where other thermoplastics would lose their mechanical properties. 

PAI is a very dimensionally stable material with an extremely low coefficient of thermal expansion (CTE) making it an excellent choice for applications that require machining to tight tolerances. It is available in a variety of formulations.

Shop for PAI

 

STANDARD SIZES
SHEET Dimensions:
12 in x 48 in
Thickness:
0.250 in – 1 in
ROD Outside Diameter:
0.394 in – 3.940 in
OPTIONS AVAILABLE
COLOR Natural
GRADES Bearing, Electrical

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes available upon request.

 

PAI MATERIAL OPTIONS

Unfilled/Electrical Grade PAI– has extremely high dielectric strength and it is often used for applications where it functions as an electrical insulator. 

Bearing Grade PAI– can be used for demanding bearing applications that require extreme loads, speeds, and/or elevated temperatures.

 

Typical properties of PAI
  UNITS ASTM TEST PAI UNFILLED GRADE PAI BEARING GRADE
Tensile strength psi D638 21,000 19,000
Flexural modulus psi D790 711,000 870,000
Izod impact (notched) ft-lbs/in of notch D256 2.3 2.0
Heat deflection temperature @ 264 psi °F D648 532 534
Maximum continuous service
temperature in air		 °F   500 500
Water absorption (immersion 24 hours) % D570 0.30 -
Coefficient of linear thermal
expansion		 in/in/°Fx10-5 D696 1.7 -

Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.

Need more information about this material? Use our interactive plastic properties table