Engineering Plastics Polybutylene Terephthalate - PBT

Polybutylene terephthalate (PBT) is a versatile engineering thermoplastic known for its excellent combination of mechanical, electrical, and thermal properties. It belongs to the polyester family and is commonly used in various industries due to its wide range of advantageous characteristics. Here’s a closer look at PBT:

Key Characteristics:

  1. Mechanical Properties: PBT offers high strength, stiffness, and toughness, making it suitable for applications requiring structural integrity and impact resistance.

  2. Heat Resistance: PBT exhibits good heat resistance, with a relatively high melting point (around 225-235°C or 437-455°F). It retains its mechanical properties at elevated temperatures, making it suitable for high-temperature applications.

  3. Electrical Insulation: PBT has excellent electrical insulation properties, making it suitable for electrical and electronic applications where insulation and reliability are essential.

  4. Chemical Resistance: It demonstrates good resistance to many chemicals, oils, and solvents, enhancing its suitability for use in harsh environments.

  5. Dimensional Stability: PBT exhibits low moisture absorption and good dimensional stability, maintaining its shape and size over a wide range of temperatures and environmental conditions.

  6. Processing: PBT is easily processed using common plastic processing techniques such as injection molding, extrusion, and blow molding, allowing for the manufacture of complex shapes and parts.


  • Automotive: PBT is widely used in automotive components such as connectors, housings, sensors, and under-the-hood parts due to its mechanical strength, heat resistance, and chemical resistance.

  • Electrical and Electronics: It finds applications in electrical connectors, sockets, switches, circuit breakers, and insulating components in electrical and electronic devices due to its excellent electrical insulation properties and dimensional stability.

  • Consumer Goods: PBT is used in the manufacturing of consumer goods such as appliance housings, handles, knobs, and electronic device enclosures due to its toughness, heat resistance, and aesthetic appeal.

  • Industrial Components: PBT is utilized in various industrial applications such as gears, bearings, pumps, and valves due to its mechanical properties, wear resistance, and chemical resistance.

  • Textiles: PBT fibers are used in the textile industry for manufacturing fabrics, garments, and industrial textiles due to their strength, resilience, and resistance to stretching and shrinking.

Overall, Polybutylene terephthalate (PBT) is a versatile engineering plastic with a wide range of applications across various industries, thanks to its excellent combination of mechanical properties, electrical insulation, heat resistance, and chemical resistance.

Open chat
Hello 👋
Can we help you?