30KV/mm High Strength Polyimide Paper for Motor Coil Wrap

Minimum Order Quantity :	50	Price :	25
Payment Terms :	T/T

Place of Origin:	CHINA	Brand Name:	Longtai
Certification:	ISO 9001 ROHS	Document:	Polyimide Paper.pdf

Detail Information
Breakdown Voltage:	See Picture Show	Tensile Strength:	32-250 N/10mm
Thickness:	0.05-0.3MM	Dielectric Strength:	10-30kv/mm
Long-term Temperature:	210℃-280℃	Tear Strength:	＞4kN/m

Product Description

30KV/mm High Strength Polyimide Paper for Motor Coil Wrap

This high dielectric polyimide paper features max 30KV/mm breakdown strength, covering thicknesses from 0.06mm to 0.3mm. It serves as core wrapping insulation for EV traction motor coils, effectively resisting high voltage impulse and avoiding winding breakdown under long-term high-temperature operation.

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

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We Are a Source Manufacturer Integrating R&D, Production, And Sales of Automotive Outdoor Equip-Ment | Main Products Include: Rooftop Tents | Car Side Awnings | Roof Platforms | Pickup Truck Accessories Include: Tonneau Covers, Canopies, Truck Roll Bars | Customization Support: Color, Pattern, Logo and Full-Detail Customization

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