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
12 in x 48 in
0.250 in – 1 in
0.394 in – 3.940 in
Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes available upon request.
PAI Properties and 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
||PAI UNFILLED GRADE
||PAI BEARING GRADE
|Izod impact (notched)
||ft-lbs/in of notch
|Heat deflection temperature @ 264 psi
|Water absorption (immersion 24 hours)
|Coefficient of linear thermal
Note: The properties reported reflect typical values for extruded PAI shapes. The properties of compression molded and injection molded PAI will vary from these values.
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