The Universal Selection Source: Plastics & Elastomers

Selection Guide

Polybutylene Terephthalate (PBT)

Benefits and main applications of Polybutylene Terephthalate (PBT) and its alloys are described within this content: beyond saving weight and decreasing costs PBT and PBT alloys offer many other benefits to the plastic industries in end-markets like automotive, consumer goods as well as electrical & electronics.

Polybutylene Terephthalate

Polybutylene Terephthalate
  • Polybutylene Terephthalate (PBT) is a semi-crystalline engineering-grade thermoplastic.
  • It combines excellent mechanical and electrical properties with robust chemical resistance to a wide range of chemicals, solvents, oils and greases.
  • Polybutylene Terephthalate is a member of polyester family of polymers.
  • It provides innovative solutions that save weight and decrease costs and offers fast crystallization.
  • PBT offers high strength, rigidity, and toughness.
  • Polybutylene Terephthalate has excellent dimensional stability, low moisture absorption, and powerful insulation resistance.
  • Unfilled PBT grades have a wide range of melt viscosities. This helps to provide processing latitude in injection molding and extrusion techniques (from melt-blowing of PBT fibers to production of PBT rod and slab, fiber optic buffer tubes or brake cable liners).
  • Reinforced Polybutylene Terephthalate grades applications include:

    • Automotive ignition
    • Electrical system parts
    • Electrical and electronic connectors and sockets
    • Switches, bobbins
    • Motor housings and insulation
    • Appliance housings, handles and bases
  • Flame-retardant Polybutylene Terephthalate and lubricated PBT versions are also available in both unreinforced and reinforced grades.
  • The broad use of PBT is also shown by the numerous regulatory approvals held by various grades. These include VDE or UL-approvals for the E/E market or FDA approval for the nutrition and medical market.

Polybutylene Terephthalate and Polyester Alloy


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