TECAPAI CM XP440 black-green

PAI Modified Bearing Grade

Proprietary additives are what makes TECAPAI CM XP440 black-green compression moulded 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 moulded allows for minimum run quantities as low as 1 piece, which adds to the product's appeal.

Torlon® PAI is a registered trademark of the Solvay Group.


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

Main Features

  • excellent wear properties
  • excellent chemical resistance
  • 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 Parameter Norm
    Modulus of elasticity
    (tensile test)
    4300 MPa DIN EN ISO 527-2
    Elongation at break (tensile test) 4,7 % 5mm/min DIN EN ISO 527-2
    Flexural strength 134 MPa 2mm/min, 10 N DIN EN ISO 178
    Modulus of elasticity
    (flexural test)
    4000 MPa 2mm/min, 10 N DIN EN ISO 178
    Compression strength 13/33/87 MPa 1% / 2% / 5% EN ISO 604
    Impact strength (Charpy) 34 kJ/m2 max. 7,5J DIN EN ISO 179-1eU
    Shore hardness 88 - D scale DIN EN ISO 868
  • product-technical-detail-collapse-item-1-lvl-1
    Thermal properties Value Unit Parameter Norm
    Glass transition temperature 283 C DIN EN ISO 11357
    Thermal expansion (CLTE) 3,5 10-5*1/K 23-60°C, longitudinal DIN EN ISO 11359-1;2
    Thermal expansion (CLTE) 3,5 10-5*1/K 23-100°C, longitudinal DIN EN ISO 11359-1;2
  • product-technical-detail-collapse-item-2-lvl-1
    Other properties Value Unit Parameter Norm
    Flammability (UL94) V0 - 3,3 mm -

Stock program