PBT (polybutylene terephthalate) is a semi-crystalline engineering thermoplastic polyester that combines rigidity with moderate toughness and excellent dimensional stability. It is widely used in automotive electrical connectors, appliance housings, power tool components, and industrial switches where it must withstand repeated thermal cycling, chemical exposure, and mechanical stress. Engineers select PBT over commodity plastics when dimensional tolerance, flame resistance, and long-term performance at elevated temperatures are critical; it is often glass-fiber reinforced to enhance stiffness and creep resistance for demanding applications.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Strength(σc) | 253.3 | MPa | — | ||
Elongation at Break(εf) | 58.99 | - | — | ||
Flexural Strength (MOR)(σf) | 73.94 | MPa | — | ||
Hardness (Vickers)(HV) | 136.7 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 53.69 | MPa | — | ||
Young's Modulus(E) | 1.930 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 320.1 | K | — | ||
Melting Point / Solidus(Tm) | 496.7 | K | — | ||
Maximum Service Temperature(Tmax) | 624.4 | K | — | ||
Thermal Conductivity(k) | 0.2700 | W/(m·K) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 1.842 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.503 | - | — |