Brand: YILONG
Materials: alkali-free glass fiber cloth + phenol-modified diphenyl ether resin
Density:1.8~1.95 g/cm³
Thickness: 0.5-200mm
Size: 1020x2010mm,1020x2040mm,1220x2440mm or customized.
Temperature Index: H 180℃
Packaging: Pallet, Wooden Box
Description
Modified Diphenyl Ether Laminated Glass Cloth Sheet is a plate-like laminate made from alkali-free glass fiber cloth impregnated with phenol-modified diphenyl ether resin, then baked and hot-pressed. This material exhibits excellent mechanical strength, high dielectric properties, and strong radiation resistance. It also offers good machinability and stability, making it ideal for use as insulating structural components in motors, electrical equipment, and other high-performance electrical applications.
Features
Superior electrical insulation, effectively preventing electrical leakage.
High temperature resistance (Class H, 180°C) while maintaining structural integrity.
Flame retardant, enhancing fire safety in applications.
Excellent mechanical strength, providing stability and durability under stress.
Outstanding chemical resistance against oils, solvents, and acids.
Dimensional stability under temperature and humidity fluctuations.
Easy to process: can be cut, drilled, and shaped for specific applications.
Versatile applications: suitable for electrical insulation, thermal insulation, gasketing, and structural support.
Long-lasting durability, capable of withstanding harsh conditions.
Compliant with industry standards for reliable performance.
Applications
Insulation structural components in motors and electrical equipment
Air gap pillars in Class H dry-type transformers
Air gap blocks in Class H dry-type transformers
Iron blocks in Class H dry-type transformers
Phase spacers in Class H dry-type transformers
Technical Data Sheet
| Diphenyl ether laminated glass cloth board (3255) | ||||||
| No. | Property | Unit | 3255-1 | 3255-2 | 3255-3 | 3255-4 |
| 1 | Appearance | — | Smooth, flat surface; no bubbles or impurities; slight scratches, dents, or uneven color allowed; edges cut neatly; no delamination or cracks at ends | |||
| 2 | Water Absorption | % | ≤0.4 | — | ≤0.4 | — |
| 3 | Density | g/cm³ | ≥1.75 | 1.7–1.9 | ≥1.79 | 1.7–1.9 |
| 4 | Flexural Strength (Longitudinal) | MPa | ≥350 | ≥350 | ≥400 | ≥400 |
| 5 | Impact Strength (Longitudinal, simply supported, unnotched) | kJ/m² | ≥147 | ≥150 | ≥180 | ≥180 |
| 6 | Volume Resistivity | |||||
| At Normal conditions | Ω·m | ≥1.0×10¹¹ | ≥1.0×10¹¹ | ≥1.0×10¹¹ | ≥1.0×10¹² | |
| After water immersion | ≥1.0×10⁸ | ≥1.0×10⁸ | ≥1.0×10⁸ | ≥1.0×10⁸ | ||
| At 180°C | ≥1.0×10⁸ | ≥1.0×10⁸ | ≥1.0×10⁸ | ≥1.0×10⁸ | ||
| 7 | Surface Resistivity | |||||
| At Normal conditions | Ω | ≥1.0×10¹³ | ≥1.0×10¹² | — | — | |
| After water immersion | ≥1.0×10¹¹ | ≥1.0×10¹¹ | — | — | ||
| 8 | Dielectric Strength (Vertical, in transformer oil 90±2°C) | |||||
| Plate 0.5–1.0 mm | MV/m | ≥22 | ≥22 | ≥25 | ≥25 | |
| Plate 1.1–2.0 mm | ≥20 | ≥20 | ≥22 | ≥20 | ||
| Plate 2.2–3.0 mm | ≥15 | ≥18 | ≥18 | ≥16 | ||
| Plate >3 mm (processed) | ≥15 | ≥16 | ≥16 | ≥15 | ||
| 9 | Parallel Layer Breakdown Voltage (90±2°C in transformer oil) | kV | ≥22 | ≥22 | ≥25 | ≥22 |
| 10 | Temperature Index | °C | 180 | 180 | 180 | 180 |
3255-1: Phenol-modified diphenyl ether glass cloth laminated sheet made from high-temperature dewaxed glass cloth impregnated with phenol-modified methoxydiphenyl ether resin, dried and hot-pressed.
3255-2: Phenol-modified diphenyl ether glass cloth laminated sheet made from high-temperature dewaxed glass cloth impregnated with phenol-modified poly-diphenyl ether resin, dried and hot-pressed.
3255-3: Diphenyl ether epoxy-imide glass cloth laminated sheet made from high-temperature dewaxed glass cloth impregnated with diphenyl ether epoxy-imide resin, dried and hot-pressed.
3255-4: Oxazine-modified diphenyl ether glass cloth laminated sheet made from high-temperature dewaxed glass cloth impregnated with oxazine-modified diphenyl ether resin, dried and hot-pressed.
Application Tips:
Laminated sheets have different properties from metals; processing must follow JB/Z141 standards to avoid damage.
Due to low thermal conductivity, high cutting speed and small feed rate are required.
Mechanical processing generates dust and fumes; adequate labor protection is necessary.
Thin laminated sheets can be used to wrap transformer coil outer cylinders.
Precautions:
If sheets become damp during storage or processing, bake at a low temperature.
Storage period is 1 year; sheets can still be used after inspection if beyond this period.
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