Polybutylene terephthalate (PBT), a type of polyester, is synthesized from 1.4-pbt butylene glycol and para-terephthalic acid (PTA) or dimethyl terephthalate (DMT) through polycondensation, and then processed into a milky, translucent to opaque, crystalline thermoplastic polyester resin through blending. It is commonly referred to, along with PET, as thermoplastic polyester or saturated polyester.Applicable toElectronic computer coversConnectors, switch parts, household appliances, accessory parts, small electric covers、Mercury lamp shades, ironing board covers, oven parts, along with a large assortment of gears, cams, buttons, and electronic watch cases.Engines heat release covers, etc.; Internal parts: mainly endoscopic struts, windshield wiper brackets, and control valve systems.、Automotive ignition coil wires and various electrical connectors.
| Physical Properties | Rated value | Unit system | Testing Method |
Density | 1.31 | g/cm³ | ISO 1183 |
Absorption rate (23°C, 24 hr) | 0.20 | % | ISO 62 |
| Mechanical properties | Rated Value | Unit system | Testing Method |
Tensile stress | 60.0 | MPa | ISO 527-2 |
Breakage Rate | 20 | % | ISO 527-2 |
Bending Modulus | 2500 | MPa | ISO 178 |
Bend Strength | 89.0 | MPa | ISO 178 |
| Impact Resistance | Rated Value | Unit System | Test Method |
Simply supported beam notch impact strength | 3.2 | kJ/m² | ISO 179/1eA |
| Thermal performance | Rated Value | Unit system | Testing Method |
Hot Deformation Temperature (1.8 MPa, annealed) | 73.0 | °C | ISO 75-2/A |
Linear expansion coefficient | Internal methods | ||
Flow: 23 to 55°C | 1.1E-4 | cm/cm/°C | |
Horizontal: 23 to 55°C | 1.1E-4 | cm/cm/°C |
| Electrical Performance | Rated Value | Unit system | Testing Method |
Volume resistivity | 5.0E+16 | ohm·cm | IEC 60093 |
Dielectric Strength (3.00 mm) | 17 | kV/mm | IEC 60243-1 |
