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Insulation Material Polyimide Paper Used in Transformer Temperature Resistant -210℃-280℃ Long-term Use
Insulation Material Polyimide Paper For Transformer
Product Overview
This high-performance polyimide insulating paper is specially developed for winding insulation of dry-type and oil-immersed high-temperature transformers. It supports long-term continuous operation at 210℃ to 280℃, far exceeding the heat resistance limit of conventional Class H (180℃) insulation materials, classified as ultra-high heat-resistant Class C insulating substrate.
Manufactured with high-purity polyimide fiber forming technology, it integrates superior electrical insulation, mechanical strength and thermal stability. It overcomes defects of traditional aramid paper such as dielectric attenuation, dimensional shrinkage and poor oil aging resistance under high temperature, perfectly matching insulation demands of hot-spot zones in high-end power transformers.
Key Technical Properties
Thickness Range: 0.06mm ~ 0.25mm, custom slitting width available
Dielectric Strength: ≥15kV, stable insulation performance under continuous high temperature
Mechanical Property: Longitudinal tensile strength ≥160MPa, tear strength ＞4kN/m, flexible for automatic winding without cracking
Thermal Endurance: Long-term service temperature 210℃–280℃, no softening, shrinkage or toxic volatilization under persistent high heat
Chemical Resistance: Inert to transformer insulating oil, impregnating varnish, acid and alkali solvents, no pulverization or degradation after long-time immersion
Core Advantages
Ultra-high heat resistance: Stable long-term service at 210–280℃, resistant to instantaneous overheating impact during transformer overload, extending equipment service life greatly
Reliable dielectric performance: Slight breakdown voltage drop under high temperature, high frequency and oil immersion, restraining space charge accumulation and partial discharge
Outstanding mechanical toughness: High tensile & tear resistance, good flexibility for coil wrapping and interlayer lining without damage
Low thermal shrinkage: Stable dimension under wide temperature range, no deformation after long-term high-temperature operation to secure winding insulation structure
Flame retardant & eco-friendly: Self-extinguishing, halogen-free and zero harmful gas emission at high temperature, complying with fire safety standards for dry-type transformers
Main Applications
Inter-turn & interlayer insulation for dry-type special transformers, high-frequency power transformers, traction transformers
Core isolation, hot-spot reinforcement liner and high-voltage coil wrapping for transformers
High-temperature insulation components inside new energy power converters and rail transit power equipment
Company Introduction:
Inner Mongolia Kaiyue Information Technology Co., Ltd. Founded in 2021 and headquartered in Yongkang City, Zhejiang Province ,
China. The office is located in Hohhot City. We are a source manufacturer integrating R&D, production, and sales of ... Company Introduction:
Inner Mongolia Kaiyue Information Technology Co., Ltd. Founded in 2021 and headquartered in Yongkang City, Zhejiang Province ,
China. The office is located in Hohhot City. We are a source manufacturer integrating R&D, production, and sales of ...
