F-class epoxy phenolic resin mica tape - China Manufacturer
I am a China-based Manufacturer delivering the F-class epoxy phenolic resin mica tape to electrical equipment makers and project teams worldwide. This tape combines premium mica with a tough epoxy phenolic resin system, delivering reliable insulation for windings, coils, motors, and transformers in demanding service. I designed it for Class F applications, with excellent thermal stability up to 155°C, strong chemical and moisture resistance, and dependable dielectric performance in harsh environments. I offer flexible options: widths, thicknesses, and resin contents, plus packaging, color coding, and QA documentation to fit your supply chain needs. You’ll appreciate my consistent quality, competitive pricing, and short lead times—perfect for mass production or urgent replacements. If you are seeking a proven insulating solution from a trusted Manufacturer, I’m ready to discuss your specs, test data, and certification requirements to ensure a seamless supply chain from China.
F-class epoxy phenolic resin mica tape Ahead of the Curve Trusted by Pros
F-class epoxy phenolic resin mica tape delivers industry-leading thermal and electrical performance for demanding insulation applications. Engineered for continuous operation up to 155°C, its epoxy-phenolic impregnation bonds mica flakes into a flexible, high-dielectric-strength tape that resists heat, flame, oils and solvents. Consistent thickness, excellent mechanical toughness and low thermal aging make it the go-to choice for stators, rotors, transformers and high-temperature electrical assemblies — ahead of the curve, trusted by pros. Designed for global procurement, our production and quality-control systems ensure uniform reels, tight tolerances and batch traceability to support large-scale manufacturing. Custom widths, impregnation grades and finished treatments are available to match application specifications, and full technical data, performance testing and sample reels can be provided for qualification. Competitive lead times, scalable volumes and compliance with international insulation standards make this mica tape a reliable investment for long-term performance and uptime.
{ F-class epoxy phenolic resin mica tape Ahead of the Curve Trusted by Pros}
| Property | Typical value / range | Test method / Standard | Units | Notes |
|---|---|---|---|---|
| Thermal class | Class F | IEC 60085 | — | Rated for continuous operation at 155°C |
| Continuous operating temperature | 155 | IEC 60085 | °C | Maximum recommended continuous service temperature |
| Short-term peak temperature | 200–220 | Internal thermal cycling | °C | Short-duration thermal spikes (minutes) |
| Glass transition (Tg) | 120–160 | DSC (ISO 11357) | °C | Depends on epoxy/phenolic ratio and filler |
| Thermal decomposition onset (Td) | >350 | TGA (ISO 11358) | °C | Onset of major mass loss in air |
| Dielectric strength (through-thickness) | 12–20 | ASTM D149 / IEC 60243 | kV/mm | Measured on cured tape samples; thickness-dependent |
| Dielectric constant (1 kHz) | 4.5–7.0 | IEC 60250 | — | Influenced by mica content and resin ratio |
| Dissipation factor (tan δ, 1 kHz) | 0.02–0.06 | IEC 60250 | — | Lower values preferred for high-frequency use |
| Volume resistivity | >1×10^14 | IEC 60093 | Ω·cm | Measured at 23°C, dry |
| Surface resistivity | >1×10^12 | IEC 60093 | Ω (sq.) | High surface insulation for creepage control |
| Thermal conductivity | 0.3–0.8 | ISO 22007 / ASTM D5470 | W·m⁻¹·K⁻¹ | Enhanced by mica filler vs. pure polymer |
| Coefficient of thermal expansion (CTE) | 10–30 | ISO 11359 | ppm/°C | In-plane value; mica reduces CTE vs. resin alone |
| Tensile strength (in-plane) | 30–80 | ASTM D882 | MPa | Typical cured tape values; depends on weave/thickness |
| Elongation at break | 1–5 | ASTM D882 | % | Relatively low due to rigid resin and mica filler |
| Moisture absorption (24 h) | <0.5 | ASTM D570 | % | Low water uptake supports dielectric stability |
| Flammability | V-0 (material dependent) | UL 94 | — | Phenolic content and mica improve flame performance |
| Chemical resistance | Good to moderate | ASTM D543 (guideline) | — | Resistant to transformer oils and common solvents; strong acids/alkalis may affect resin |
| Adhesion / Peel strength (pre-impregnated variants) | 2–5 | ASTM D3330 (peel) | N/cm | Varies with surface treatment and cure schedule |
| Typical thicknesses | 0.08, 0.10, 0.15, 0.20, 0.25 | — | mm | Common choices for winding and slot liners |
| Typical areal weight | 80–220 | Calculated from thickness & composition | g/m² | Correlates with mechanical stiffness and dielectric properties |
| Recommended cure schedule | 150–180 for 30–120 | Manufacturer-specific guidance | °C / min | Temperature (°C) and time (min); adjust for thickness and part size |
| Typical applications | Motor coils, stator slot insulation, transformers, high-temp windings | — | — | Designed for electrical insulation under elevated temperatures |
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