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Polybutylene Terephthalate (PBT) Materials

Polybutylene Terephthalate (PBT) is a strong synthetic resin produced by the polymerization of butanediol and terephthalic acid. PBT delivers strength, dimensional stability, weatherability, colorability and overall durability. It resists chemicals and solvents; has minimal shrinkage during forming; is mechanically strong and heat resistant; and can be treated with flame retardants, making it non-combustible.

PBT has a low melting point, excellent flow when molten and rapid crystallization, making it ideal for injection molding into solid parts.

Characteristics and Properties

  • Good dimensional stability
  • Ease of flow
  • Good mechanical strength
  • Tensile strength up to 17,000 PSI
  • Excellent chemical resistance
  • Good insulating properties
  • Agency ratings – Underwriters Laboratories (UL) flammability and RTI International


  • Electrical housings
  • Plug connectors
  • Appliances
  • Personal care
  • Yarn and other textiles
  • Mobility - Under-the-hood auto parts

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