Thermoplastic
PBT (polybutylene terephthalate)
Semi-crystalline engineering polyester; fast-crystallizing, electrically insulating and dimensionally stable — the workhorse of electrical connectors, usually glass-filled in service.
| Property | Value | Source | Method | Conditions | Note |
|---|---|---|---|---|---|
| Density | 1.31 g/cm³ | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | ISO 1183 | 23 °C, dry | — |
| Young's modulus E | 2.6 GPa | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | ISO 527 | 23 °C, dry | neat resin; glass-filled grades far stiffer |
| Tensile strength | 55 MPa | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | ISO 527 | 23 °C, dry | 50–60 typical, neat |
| Glass transition Tg | 45 °C | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | DSC | 23 °C, dry | — |
| Melting point Tm | 225 °C | CAMPUS plastics database — typical grade datasheet values (campusplastics.com) | DSC | 23 °C, dry | — |
Used in
See where PBT fits in a real product, and what it competes with:
Compare with
PBT (polybutylene terephthalate) vs Polypropylene (PP)
PBT (polybutylene terephthalate) vs Polyamide 6 (PA6, Nylon 6)
PBT (polybutylene terephthalate) vs Polycarbonate (PC)
PBT (polybutylene terephthalate) vs PEEK
PBT (polybutylene terephthalate) vs Polyethylene, high-density (HDPE)
PBT (polybutylene terephthalate) vs PVC, rigid (uPVC)
Sources
- CAMPUS plastics database — typical grade datasheet values (campusplastics.com)
Typical room-temperature values for learning and preliminary design; grades vary. Always confirm against the supplier datasheet before design work. Data policy: docs/DATA-SOURCES.md in the repository.