Resin Families

Polybutylene Terephthalate (PBT)

Polybutylene Terephthalate, also known as PBT, has high strength and chemical reistance with good creep electricals.

All Resin Families

Thermoplastic polyester (PBT) is a semi-crystalline structure based on polybutylene terephthalate that provides high strength, rigidity and toughness, low creep even at high temperatures and resistance to a wide range of chemicals, solvents, oils and greases.

Polymer Characteristics

  • Good strength and stiffness
  • Good temperature resistance
  • Good chemical resistance
  • Good tribological properties
  • Low moisture absorption
  • Low oxidative yellowing
  • Excellent electrical properties
  • Rapid crystallization and fast cycle time


  • Glass fiber and glass sphere reinforced
  • Glass fiber reinforced with very high surface gloss
  • Glass fiber/mineral reinforced
  • Flame retardant
  • UV stabilized
  • Hydrolysis resistant grades
  • Medical
  • Special colors for laser marking

Processing Methods

  • Injection molding
  • Extrusion
  • Meltblown
  • Water- and gas-injection technology

Typical Applications

  • Housings
  • Connectors
  • Electrical components (arc suppressors, switch bases)
  • Door handles, windshield wiper arms

Trade Names

  • Celanese Celanex®
  • Celanese Vandar®
  • BASF Ultradur®
  • Ravago Hylox®
  • Enviroplas®