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Electrical Insulation Epoxy Fiberglass Mesh Fabric from Hanyao factory has strict technical requirements,Alkali-free glass fiber (E-glass) must be used, and its epoxy coating must be perfectly compatible with the epoxy resin system used for transformer casting. It must be able to withstand the high curing temperature of epoxy resin (typically >100℃）and the long-term operating temperature of the transformer.
After wrapping, padding, or laying epoxy mesh between the winding layers and pouring epoxy resin, the mesh acts like the reinforcing steel in reinforced concrete, providing strong tensile strength and effectively resisting the radial expansion and axial compression of the windings under electromagnetic forces.The mesh fabric can prevent cracking and disperse stress, which greatly improves the crack resistance and toughness of the cast winding and ensures the reliability of the transformer in long-term operation.
| Item | Parameter name | Requirements | Test Method |
| Mechanical properties | Weight per unit area | 80 - 200 g/m² | GB/T 9914.3 |
| Mesh size | 2 mm x 2 mm ~ 5 mm x 5 mm | - | |
| Thickness | 0.08 - 0.20 mm | ASTM D1777 | |
| Tensile strength (warp/weft) | ≥ 1000 N/25mm | ASTM D5035 | |
| Elongation | ≤ 3% | ASTM D5035 | |
| Thermal properties | Long-term heat resistance | 155 - 180 °C | - |
| Thermogravimetric analysis (TGA) | ≤ 1% at 200°C | - | |
| Electrical properties | Breakdown voltage | ≥ 35 kV/mm | ASTM D149 |
| Volume resistivity | ≥ 1.0 x 10¹⁴ Ω·cm | ASTM D257 | |
| Surface resistivity | ≥ 1.0 x 10¹⁴ Ω | ASTM D257 | |
| Relative permittivity | 4.5 - 5.5(50Hz) | ASTM D150 | |
| Dielectric loss factor | ≤ 0.02 (50Hz) | ASTM D150 | |
| Chemical and environmental performance | Flammability | No | - |
| Chemical resistance | Excellent | - | |
| Resin compatibility | Excellent | - |
Disclaimer: The performance figures, parameters, and features described are typical values under specific test conditions and may vary in actual applications. They do not constitute a warranty or guarantee of performance under all conditions. Users are responsible for verifying the suitability of the product for their intended application.
1.Electrical Insulation Epoxy Fiberglass Mesh Fabric is able to withstand temperature upto 150℃ and 180℃.
2.It has extremely high radial and axial tensile strength.
3.It has high dielectric strength, capable of reliably isolating high- and low-voltage windings and turns.
4.Its heat resistance ensures that the transformer has a design life of up to several decades.
5.Its core application in dry-type transformers is to enhance the mechanical strength and insulation of the windings.
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