The Universal Selection Source: Plastics & Elastomers

Polybutylene Terephthalate (PBT)

Providing innovative solutions that save weight and decrease costs along with other benefits, PBT has made its place in end-markets like automotive, consumer goods as well as electrical & electronics. This content will familiarize you with the benefits of PBT, and polyester alloys, varied properties exhibited by PBT and their applications.

Polybutylene Terephthalate

Polybutylene Terephthalate (PBT) is a semi-crystalline engineering-grade thermoplastic. It is a member of polyester family of polymers. PBT displays excellent mechanical and electrical properties with robust chemical resistance to a wide range of chemicals, solvents, oils and greases.

This infographic below shows the major benefits of Polybutylene Terephthalate.

Polybutylene Terephthalate

It provides innovative solutions that save weight and decrease costs and offers fast crystallization & offers high strength, rigidity, and toughness. Polybutylene Terephthalate offers excellent dimensional stability, low moisture absorption, and powerful insulation resistance.

The 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


Resirene CET
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