Polybenzimidazole (PBI)

Alternative and trade names
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Its key features include:

  • Highest Compressive Strength of any unfilled resin
  • Excellent Tensile and Flexural Strength
  • Lowest coefficient of friction (COF) and highest Wear Resistance
  • Excellent Hardness
  • High Tg (467°C) and Heat Deflection Temperature (HDT)
  • Very good Plasma Resistance
  • It offers the highest Heat Resistance and Mechanical properties retention up to 400°C
  • Low Outgassing in vacuum (dry material)
  • This material data has been provided by M-Base.

    "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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    1.3 g/cm³

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    Elastic modulus

    5.8 - 5.9 GPa

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    3 %

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    Impact strength, Charpy notched

    3.5 kJ/m²

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    Tensile strength

    130.0 - 140.0 MPa

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    at 3% strain



    Coefficient of thermal expansion

    2.3e-05 - 3.3e-05 1/K

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    Specific heat capacity

    1300 J/(kg·K)

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    Thermal conductivity

    0.41 W/(m·K)

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    UL 94 V0



    Dielectric constant

    3.2 [-]

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    3.5 [-]

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    Electrical resistivity

    8000000000000 Ω·m

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    Technological properties

    Application areas

    Heat resistant textile fibres, firefighter uniforms, coatings for surface protection

    Processing methods

    Wet spinning, injection molding, extrusion, compression molding