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Polybutylene Terephthalate (PBT) is an engineering thermoplastic polyester used in automotive, medical, consumer, electrical and electronics industries. This semi-crystalline polyester has a very high dimensional stability and is quite hard and rigid in nature.

The wide range of PBT products with different performance profiles available in the marketplace is a tribute to the versatility of this material.

What is Thermoplastic Polyester (PBT)?

Polybutylene Terephthalate (PBT) is a very strong Engineering Thermoplastic Polymer (ETP) with very high heat and good creep resistance. Its semi-crystalline structure and chemical composition provides resistance to a huge range of chemicals, oils and greases. PBT has good electrical properties, is resistant to weathering and can be made flame retardant.

Polybutylene Terephthalate is available in multiple families of numerous grades with different key properties. These engineering polyester products are used in auto interior and exterior, small and large appliances, power tools, electrical and electronic, food handling, filtration, cosmetics, personal care, medical & pharmaceutical applications.

Chemical Name: Polybutylene Terephthalate

Key Polybutylene terephthalate Uses:

Ignition coils and chassis
Switches and sockets
Stove and oven knobs and handles

Crastin® PBT

With more than 100 formulations available, designers and engineers rely on Crastin® PBT for stiffness and toughness, superior electrical insulation and exceptional surface finishes. It’s available in FDA and EU approved grades for food and cosmetics applications.

Crastin® PBT grades are also offered that meet the most stringent Electrical Insulation Standards (EIS) and enables Celanese to offer the industry’s largest portfolio of materials pre-approved by Underwriters Laboratories (UL) and recognized to International Electrotechnical Commission (IEC) standards.

Made globally in three regions, Crastin® PBT is available wherever you are.

PROPERTIES

PBT Technical Attributes:

Hard, rigid and strong
Continuous use temperature to 140℃
Very high heat distortion temperature (HDT) especially for glass fiber reinforced grades
High dimensional stability
Good creep resistance
Good chemical & stain resistance
Good weathering resistance
Good paintability & printability
Excellent surface properties & appearance
Rapid crystallization & fast cycle time

Thermoplastic Polyester (PBT) Processing: