TECAPAI® CM XP440 black-green

PAI Modified Bearing Grade

Proprietary additives are what makes TECAPAI CM XP440 black-green compression molded PAI plastic an excellent choice as a bearing and seal material. Solvay Specialty Polymers provides the Torlon® material from which this bearing grade polyamide-imide is made, and it can be considered as Ensinger's version of a product commonly referred to in web searches as “torlon 4540”. It has excellent tribological properties including a low coefficient of friction. Additionally, TECAPAI CM XP440 has a low CLTE and good compression strength. It also maintains strength and stiffness at elevated temperatures, and combines very good machinability with strong chemical resistance to round out its polyamide-imide properties profile.
Users in the oil and gas industry will find TECAPAI CM XP440 black-green a useful Torlon material in labyrinth seals for compressors and pumps, as well as other bearing and wear components. Finally, the fact that TECAPAI CM XP440 black-green is compression molded allows for minimum run quantities as low as 1 piece, which adds to the product's appeal.


Chemical designation
PAI (Polyamide-imide)
1.46 g/cm3

Main Features

  • excellent wear properties
  • very good thermal stability
  • excellent dimensional stability
  • good machinability

Target industries

Technical details

  • product-technical-detail-collapse-item-0-lvl-1
    Mechanical properties Value Unit Condition Test Method
    Tensile strength at break 9,300 psi ASTM D 638
    Modulus of elasticity
    (tensile test)
    580,000 psi ASTM D 638
    Elongation at break (tensile test) 3.1 % ASTM D 638
    Flexural strength 15,000 psi ASTM D 790
    Modulus of elasticity
    (flexural test)
    580,000 psi ASTM D 790
    Compression strength 4,500 psi 1% strain ASTM D 695
    Compression strength 22,000 psi 10% strain ASTM D 695
    Compression modulus 350,000 psi ASTM D 695
    Shore hardness 88 - D scale ASTM D 2240
    Impact strength (Izod) 0.6 ftlbsin notched ASTM D 256
    Coefficient of friction 0.14 - static ASTM D 1894
    Coefficient of friction 0.18 - dynamic ASTM D 1894
  • product-technical-detail-collapse-item-1-lvl-1
    Thermal properties Value Unit Condition Test Method
    Deflection temperature 500 F @ 264 psi ASTM D 648
    Glass transition temperature 529 F ASTM D3418
    Thermal expansion (CLTE) 1.94 *10^-5 in/in / degre -40 °F to 302 °F ASTM E 831
  • product-technical-detail-collapse-item-2-lvl-1
    Other properties Value Unit Condition Test Method
    Flammability (UL94) V-0 - 3.3 mm -
    Limiting PV 9,300 psi-fpm ASTM D 3702
    Moisture absorption 0.2 % 24 hr immersion ASTM D 570
    Moisture absorption 1.6 % saturation ASTM D 570

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