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Description
The 355 Modified Diphenyl Ether Glass Cloth Laminated Tube is made from processed alkali-free electrical-grade fiberglass cloth bonded with diphenyl ether resin. The material is formed through compression, drying, baking, and curing, resulting in a laminated tube with high mechanical strength and excellent dielectric properties. It is classified as H-class insulation. It is suitable for dry-type transformers and other insulated electrical components that require high-temperature performance.
Features
High thermal resistance: Class H insulation, capable of continuous use at 180 °C
Excellent mechanical properties and dielectric strength
Smooth surface with minimal defects; well-cut ends and dimensional stability
Can withstand mechanical processing (e.g., threading) without delamination or debris
Manufactured from alkali-free glass cloth, ensuring stable electrical performance
Applications
Coil insulation cylinders for dry-type transformers
Insulating structural components in high-temperature electrical equipment
Electrical devices requiring H-class thermal insulation
Custom machined components for high-performance electrical systems
| 355 Modified Diphenyl ether fiberglass cloth laminated tube | |||
| No. | Item | Unit | Value |
| 1 | Density | g/cm³ | 1.7–1.9 |
| 2 | Flexural Strength (Perpendicular Lamination, Normal Conditions) | MPa | ≥ 80 |
| 3 | Axial Compressive Strength | MPa | ≥ 70 |
| 4 | Breakdown Voltage (Parallel Lamination, Transformer Oil at 90 °C) | kV | ≥ 25 |
| 5 | Dielectric Strength (Perpendicular Lamination, Transformer Oil at 90 °C) | kV/mm | 6–14 |
| 6 | Dielectric Loss Factor (50 Hz) | – | ≤ 0.03 |
| 7 | Water Absorption (3 mm thickness) | % | ≤ 1 |
| 8 | Thermal Index | – | 180 °C |
| 9 | Dielectric Strength (Overall) | kV/mm | ≥ 20 |
| 10 | Tensile Strength | MPa | ≥ 250 |
| 11 | Flexural Strength | MPa | ≥ 300 |
| 12 | Water Absorption | % | ≤ 0.1 |
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