Product Description:
Brand: YILONG
Materials: Melamine Resin + Glassfiber Cloth
Color: White
ID: 8-500mm
Length: 1000mm
Temperature Index: 130
Thermal Class: B
Flammability: V-0
Packaging: Pallet, Wooden Box
Brand: YILONG
Materials: Melamine Resin + Glassfiber Cloth
Color: White
ID: 8-500mm
Length: 1000mm
Temperature Index: 130
Thermal Class: B
Flammability: V-0
Packaging: Pallet, Wooden Box
Description
G-5 and G-9 glass melamine laminates are composite materials made from continuous filament glass cloth impregnated with a heat-resistant melamine resin binder. These laminates are hard, flame-resistant, and possess excellent electrical insulating properties even under wet or humid conditions.
G-5: An older designation largely replaced by G-9. It may still appear in older drawings or documentation but is fully interchangeable with G-9.
G-9: The modern standard, offering superior flame and arc resistance, mechanical strength, and dimensional stability.
Features
High mechanical strength and structural integrity
Excellent electrical insulation with strong dielectric properties
Heat resistant, stable from -40°C to 130°C
Chemical, corrosion, and oxidation resistant
Long-lasting durability in industrial environments
Applications
Electrical insulation in transformers, motors, and electrical connectors
Structural components in industrial machinery
Applications requiring high-strength, heat- and chemical-resistant insulation
Environments exposed to mechanical stress, heat, and industrial chemicals
Technical Data Sheet
| Test / Property | Unit | G-3 | G-5/G9 | G-7 | G-10 | G-11 | G-11H |
| PHYSICAL | |||||||
| Density | g/cm³ | 1.8 | 1.85 | 1.8 | 1.8 | 1.8 | 1.9 |
| Water Absorption, 24 hrs | % | 2.65 | 0.6 | 0.1 | 0.1 | 0.2 | 0.2 |
| MECHANICAL | |||||||
| Tensile Strength – lengthwise | MPa | 289 | 425 | 138 | 310 | 296 | 280 |
| Tensile Strength – crosswise | MPa | 234 | 352 | - | 262 | 255 | 250 |
| Flexural Strength – lengthwise | MPa | 279 | 425 | 207 | 517 | 552 | 372 |
| Flexural Strength – crosswise | MPa | 234 | 352 | - | 448 | 483 | 124 |
| Flexural Modulus – lengthwise | GPa | 12.4 | 13.8 | 11 | 18.6 | 20.7 | 14 |
| Flexural Modulus – crosswise | GPa | 9.7 | 11.7 | - | 16.6 | 18.6 | 12 |
| Izod Notched Impact – lengthwise | kJ/m² | 0.64 | 0.67 | 0.64 | 0.71 | 0.61 | 16 |
| Izod Notched Impact – crosswise | kJ/m² | 0.59 | 0.45 | - | 0.61 | 0.46 | 14 |
| Compressive Strength | MPa | 379 | 448 | 345 | 448 | 434 | 346 |
| Hardness, Rockwell M | — | 110 | 115 | 105 | 110 | 112 | 112 |
| THERMAL | |||||||
| Coefficient of Linear Thermal Expansion – lengthwise | 10⁻⁶ / °C | 1.46 | 1.27 | 1.15 | 0.88 | 1.15 | 15 |
| Coefficient of Linear Thermal Expansion – crosswise | 10⁻⁶ / °C | 1.76 | 1.45 | 1.38 | 0.88 | 1.27 | 20 |
| Max Operating Temperature | °C | 180 | 140 | 220 | 140 | 165 | 180 |
| Thermal Class | / | H | B | C | B | F | H |
| Flammability Rating | UL94 | HB | V-0 | V-0 | HB | HB | HB |
| Thermal Conductivity | W/m·K | 0.29 | 0.29 | 0.29 | 0.29 | 0.29 | 0.25 |
| ELECTRICAL | |||||||
| Dielectric Strength (short time, 1/8" thick) | kV/mm | 18.1 | 11.8 | 13.8 | 31.5 | 35.4 | 16 |
| Dielectric Constant at 1 MHz | — | 7.3 | 6.3 | 4.5 | 5 | 4.5 | 4.8 |
| Dissipation Factor at 1 MHz | — | 0.023 | 0.019 | 0.018 | 0.019 | 0.02 | 0.02 |
| Arc Resistance | s | 180 | 180 | 240 | 100 | 120 | 120 |