0.0125mm, 0.025mm Thermal Insulation Material Amber Polyimide Film for Transformer, Motor
Operating temperatures: Class H(180℃)
Unique combination of electrical, thermal, chemical and mechanical properties.
Product Introduction
We always take 'quality as the core and customer satisfaction as the goal' as the company's guiding principle and create high-quality One Side Silicone Release Paper, 80gsm Glassine Paper Sheet, Pet Based Release Coating Film. We will continue to improve ourselves while bringing competitive products and services to customers. Our company has constructed a high efficiency, low-cost organization system, with high-quality and low-cost products to dedicate to the majority of consumers. Today, our team is committed to innovation, and enlightenment and fusion with constant practice and outstanding wisdom and philosophy, we cater to the market demand for high-end products, to do professional products.
Insulation polyimide film is a high-performance polymer film engineered for motor and generator insulation applications where extreme temperature tolerance, dielectric strength, and chemical resistance are non-negotiable. Operating reliably at Class H (180°C) continuous rating - and capable of withstanding short-term exposure from -269°C to +400°C - it is the material of choice for slot liners, phase insulation, turn-to-turn insulation, and coil wrapping in motors, transformers, and high-voltage rotating equipment.
Manufactured from high-purity polyimide resin, our film maintains its electrical and mechanical properties across the full operating temperature range. It resists virtually all organic solvents, provides inherent flame retardancy, and can be combined with fluoropolymer coatings for enhanced moisture and corrosion protection. Available in rolls or custom die-cut shapes, our polyimide film is supplied to motor manufacturers, rewinding shops, and electrical equipment OEMs worldwide.
Technical Specifications
| Parameter | Value | Standard / Condition |
|---|---|---|
| Density | 1.42 ± 0.02 g/cm³ | - |
| Tensile Strength | 135 MPa (MD) / 115 MPa (TD) | - |
| Elongation at Break | 35% | - |
| Thermal Shrinkage | ≤ 1.0% at 150°C / ≤ 3.0% at 400°C | - |
| Dielectric Breakdown Strength | 150 MV/m | 50 Hz |
| Surface Resistivity | 1.0 × 10¹³ Ω | 200°C |
| Volume Resistivity | 1.0 × 10¹⁰ Ω | 200°C |
| Dielectric Constant | 3.5 ± 0.4 | 50 Hz |
| Dissipation Factor (Loss Tangent) | 4.0 × 10⁻³ | 48–62 Hz |
| Continuous Operating Temperature | -60°C to +250°C | Class H (180°C rated) |
| Short-Term Temperature Range | -269°C to +400°C | - |
| Flame Retardancy | Inherent (UL 94 V-0) | - |
Key Advantages
1. Exceptional Temperature Range Performs reliably from cryogenic conditions (-269°C) to short-term peaks of +400°C without degradation of electrical or mechanical properties. Class H (180°C) rated for continuous motor operation - ideal for high-efficiency, compact motor designs that run hot.
2. Outstanding Electrical Insulation Dielectric breakdown strength of 150 MV/m combined with high surface and volume resistivity ensures reliable phase-to-phase and turn-to-turn insulation - even in high-voltage, high-frequency motor applications.
3. Superior Chemical Resistance Resistant to virtually all organic solvents, oils, and refrigerants. Unaffected by the aggressive chemical environments found in compressor motors, traction motors, and industrial drive systems.
4. Inherent Flame Retardancy Meets UL 94 V-0 requirements without the need for halogenated flame-retardant additives. Safe for use in applications where fire safety is critical.
5. Excellent Mechanical & Dimensional Stability Tensile strength over 135 MPa with minimal shrinkage at elevated temperatures ensures tight winding, consistent slot fill, and long-term reliability under thermal cycling.
6. Process Versatility Can be die-cut, laminated, metallized, formed, thermoformed, or adhesive-coated. Compatible with automated winding and insertion equipment.
Available Formats & Customization
Standard: Rolls in various widths and thicknesses
Custom Die-Cutting: Precision-cut slot liners, phase papers, and shaped insulation components to your motor specifications
Laminated Options: Fluoropolymer (FEP/PFA) coated grades for enhanced chemical and moisture resistance
Adhesive-Coated: Single-sided pressure-sensitive adhesive backing for easy application
Applications
AC and DC motor slot liners and phase insulation
Generator stator and rotor winding insulation
Transformer interlayer and barrier insulation
Coil wrapping and taping in high-temperature windings
Traction motor insulation for rail and electric vehicles
Compressor motor insulation (hermetic and semi-hermetic)
Aerospace and defense-grade motor and actuator insulation
Why Weshare
15+ years of industrial insulation material supply experience
Polyimide film sourced from high-purity resin - consistent electrical and mechanical properties batch to batch
Custom die-cutting, laminating, and adhesive coating services
Free samples for evaluation and qualification
Professional technical recommendations - we help you select the right grade and format for your motor design
Strict lead time management with schedule commitment on every order
All of our 0.0125mm, 0.025mm Thermal Insulation Material Amber Polyimide Film for Transformer, Motor undergo rigorous product testing to satisfy our customers around the world. We deeply understand that innovation is the driving force that leads our company to sustainable development. Our company has won unanimous praise from the market for years with our strong technical force, advanced production and testing equipment, advanced quality management mode and excellent after-sales service.
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