Description
EPGC205 / G11R (HGW 2370.4) epoxy glass roving sheets are high-performance laminates made from premium epoxy resin and continuous glass rovings. Through a precise impregnation and curing process, the material achieves a uniform structure with excellent dielectric insulation and strong mechanical properties.
The combination of high-grade epoxy and tightly woven glass rovings provides outstanding resistance to thermal stress, moisture, and chemical exposure. EPGC205 is designed for demanding electrical systems and precision machinery, delivering stable insulation performance and reliable mechanical durability under continuous operation and harsh environments.
Features
Made from high-grade epoxy resin reinforced with continuous glass rovings
Precision-engineered laminate with uniform and consistent internal structure
Excellent electrical insulation and reliable dielectric performance
High mechanical strength for demanding structural insulation applications
Strong resistance to thermal stress, moisture, and chemical exposure
Designed for continuous operation under high mechanical and electrical loads
Maintains stable insulation performance in harsh and complex working environments
Applications
1. Electrical Machines Industry
Slot wedges
Slot insulating pads
Fillers and cover plates
Nut insulation and distance pieces
2. Electrical Equipment Manufacturing
Insulation structural parts for Class F electrical equipment
Intermediates and spacers with high mechanical requirements
3. Motor & Generator Industry
Insulating components used in motors and generators
Technical Data Sheet
| EPGC205 Epoxy Glass Laminate Sheet / G11-R |
| Item | Property | Unit | Standard Value | Typical Value |
| 1 | Flexural strength ⊥ | MPa | ≥340 | 510 |
| 2 | Flexural strength ⊥ | MPa | ≥170 | 320 |
| 3 | Tensile strength | MPa | ≥300 | 530 |
| 4 | Charpy impact strength ∥ (Notched) | kJ/m2 | ≥70 | 170 |
| 5 | Flexural modulus ⊥ (under normal condition) | MPa | -- | 3.2x104 |
| 6 | Flexural modulus ⊥ (under 150±5℃) | MPa | -- | 3.0x104 |
| 7 | Electric strength ⊥ (at 90℃±2℃ in oil ), 3mm thickness | kV/mm | ≥9 | 20 |
| 8 | Breakdown voltage ∥ (at 90℃±2℃ in oil) | kV | ≥45 | ≥50 |
| 9 | Insulation resistance (after 24h immersion in water) | MΩ | ≥1.0×104 | 3.8×105 |
| 10 | Water absorption, 3mm thickness | mg | ≤22 | 17 |
| 11 | Comparative tracking index (CTI) | _ | _ | CTI600 |
| 12 | Density | g/cm3 | 1.80~2.2 | 1.99 |
| 13 | Temperature index | ℃ | _ | 155℃ |
| 14 | Flammability | Class | HB | HB |