Epoxy Glass Fiber Mesh Cloth for Dry-type Transformer
I. Product Introduction
Epoxy Glass Fiber Mesh Cloth is a high-performance insulating material made from alkali-free, wax-free, silane-treated glass fiber yarn and polyester filament woven into a square-hole mesh fabric. It is produced through a process of high-temperature dehydration, epoxy resin impregnation, drying, curing, and shaping.
The material is thoroughly impregnated with epoxy resin, resulting in a bubble-free internal structure with no partial discharge. Its temperature resistance reaches Class H. It maintains high mechanical strength under both normal and high-temperature conditions, ensuring that cast transformers, reactors, and other equipment operate safely and reliably.
II. Performances
High Mechanical Strength: Tensile strength 1000–5300N (depending on thickness), maintains high strength at elevated temperatures.
Excellent Electrical Insulation: Surface breakdown voltage ≥18kV, surface insulation resistance ≥1×10¹³Ω, void-free and partial discharge-free.
High Thermal Class: Class F (155°C) / H (180°C)
"Rebar" Reinforcement: Firmly bonds with casting resin, preventing coil outer insulation cracking caused by thermal cycling and short-circuit electromagnetic forces.
Good Processability: Flexible and durable, easy to cut and layer, with high dimensional accuracy.
Eco-Friendly and Healthy: Non-hazardous to human health, a green material.
Chemical Corrosion Resistance: Resistant to heat, moisture, oil, and chemicals, suitable for harsh operating environments.
III. Applications
Dry-type transformers: Used in filled cast coils as interlayer main insulation and inner/outer layer wrapping reinforcement, preventing cracks caused by thermal expansion/contraction and short-circuit stresses.
Reactors: Used for reinforcement and insulation in coil casting. Same function as above.
IV. Technical Specifications
1. Thickness: 0.3–2.4mm (Commonly used: 0.5/0.8/1.0/1.6/2.0mm)
2. Width: 1000–2100mm (Commonly used: 1200/1300/1500mm)
3. Mesh Size (Warp × Weft): 4×4, 5×4, 6×5, 10×7mm (5×4 / 6×5 are the most commonly used)
4. Roll Length: 30/40/50/100m (±0.5m)
5. Weight per Square Meter (gsm): 150–1100g/m² (increases with thickness)
6. Color: Red
Customization: Width, thickness, mesh size, and color can be customized according to customer requirements.
Storage and Transportation: Store flat, protect from moisture and direct sunlight. Stacking height ≤ 5 layers. Ambient temperature: -10°C to 40°C.
