Polybutylene theraphthalate (PBT) is a semi-crystalline engineering thermoplastic. It has high heat resistance, stiffness and hardness, excellent slip/fictional properties and good resistance to chemicals. PBT has high dimensional stability and mechanical strength for complex thin walls. It can be colored.

Property Measure Low Measure High
Specific gravity 0.0473 lb./in.3 (1.31 g/cc) 0.0473 lb./in.3 (1.31 g/cc)
Melting point 437°F (225°C) 437°F (225°C)
Glass transition temperature 140°F (60°C) 140°F (60°C)
Tensile strength at break Not Available Not Available
Elongation at break 200% 200%
Hardness durometer (Shore A) Not Applicable Not Applicable
Hardness durometer (Rockwell M) 78 78
Water absorption @ 24 hours 0.09% 0.09%
Sterilization Ethylene oxide (EtO)
Gamma and E-beam radiation
Steam autoclaving

This material data sheet is presented for reference only. For a specific application and environment, characteristics and performance may vary. Product design and suitability for use are the sole responsibility of Microspec’s customer. Microspec strongly urges customers to consult with the material manufacturer.