Glass Polyester Characteristics
Glass Polyester is a glass-mat reinforced polyester.
GPO-1 is a cost-effective, general purpose laminate. It is a solid choice for applications in which good electrical properties, good physical strength and moderate heat resistance are required.
GPO-2 is the laminate of choice when arc or flame resistance is required. It has good electrical and physical properties and heat resistance.
GPO-3 is the laminate to choose when arc, flame and carbon track-resistance are needed. GPO-3 offers good physical strength and moderate heat resistance. It is used extensively in the making of electrical components.
Economical general purpose laminate (GPO-1)- Good electrical properties (GPO-1, 2 & 3)
- Excellent structural properties (GPO-1, 2 & 3)
- Flame-resistant (GPO-2 & 3)
- UL recognized laminate GPO-2 & 3)
- Arc- and track-resistant (GPO-3)
See the chart below for more details on glass polyester properties.
Applications for Glass Polyester Thermosets
- High amperage mounting panels (GPO-2)
- Switch bases (GPO-2)
- Terminal strips (GPO-2)
- Arc shoot components (GPO-2)
- Phase and end barriers (GPO-3)
- Insulating and bus bar supports (GPO-3)
- Mounting panels in switchgear and other types of electrical apparatus (GPO-3)
Contact a Dielectric Manufacturing knowledge expert to discuss the use of glass polyesters for fabrication of your parts. Call 800-367-9122 or email sales@dielectricmfg.com.
Glass Polyester Material Properties
| Property | Metric | units | English | units | ||
|---|---|---|---|---|---|---|
| General | ||||||
| Density | 1.7e3 - 2.5e3 | kg/m^3 USD/kg | 0.0614 - 0.0903 | lb/in^3 USD/lb | ||
| Mechanical | ||||||
| Yield Strength | 3.66e7 - 4.04e7 | Pa | 5.3 - 5.86 | ksi | ||
| Tensile Strength | 2.5e7 - 5.5e7 | Pa | 3.63 - 7.98 | ksi | ||
| Hardness (Vickers) | 1.35e8 - 1.49e8 | Pa | 13.8 - 15.2 | HV | ||
| Impact Strength (notched) | 4e3 - 3e4 | J/m^2 | 1.9 - 14.3 | ft.lbf/in^2 | ||
| Fracture Toughness | 1.41e6 - 2.69e6 | Pa/m^0.5 | 1.28 - 2.45 | ksi/in^0.5 | ||
| Young's Modulus | 9e9 - 1.44e10 | Pa | 1.31 - 2.09 | 10^6 psi | ||
| Thermal | ||||||
| Max Service Temperature | 151 - 168 | °C | 304 - 334 | °F | ||
| Insulator or Conductor | Insulator | Insulator | ||||
| Specific Heat Capability | 1.09e3 - 1.42e3 | J/kg °C | 0.26 - 0.34 | BTU/lb. °F | ||
| Thermal Expansion Coefficient | 2.00E-05 | strain/°C | 11.1 | µstrain/°F | ||
| Eco | ||||||
| CO2 Footprint | 7.59 - 8.38 | kg/kg | 7.59 - 8.38 | lb/lb | ||
| Recyclable | No | No |
