Polybutylene terephthalate Reinforced with 30% Glass Fibre (PBT+GF30)

Alternative and trade names
Ultradur®, Crastin®, Celanex®, Pocan®, TECACOMP®, Arnite®, Raditer®, VYPET™
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Reinforced Polybutylene terephthalate with 30% glass fiber.

  • Very good stiffness and toughness
  • Wear resistance
  • Excellent surface finishes and good colourability.
  • It has an excellent electrical insulation characteristics and high arc-resistant grades are available.
  • Many flame retardant grades have UL recognition (class V-0).
  • It typically has high chemical and heat ageing resistance.
  • The good melt stability normally enables the recycling of properly handled production waste.
  • 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.

    Ashby charts

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    1.47 - 1.56 g/cm³

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    Elastic modulus

    8.0 - 11.0 GPa

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    1.8 - 3.5 %

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    Impact strength, Charpy notched

    5.0 - 12.0 kJ/m²

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    Impact strength, Charpy unnotched

    40 kJ/m²

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    70 kJ/m²

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    Tensile strength

    100.0 - 150.0 MPa

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    at 1.8-3.5% strain



    Coefficient of thermal expansion

    2e-05 - 0.0001 1/K

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    Melting point

    220.0 - 225.0 °C

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    Specific heat capacity

    1500 J/(kg·K)

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    Thermal conductivity

    0.27 - 0.28 W/(m·K)

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    UL 94 HB



    Dielectric constant

    3.5 [-]

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    4.5 [-]

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    Electrical resistivity

    10000000000000 Ω·m

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    Technological properties

    Application areas

    windshield wiper arms, printed circuit boards, airbag ignition sensors


    30% Glass Fiber


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    Processing methods

    Injection molding, extrusion