High-Performance FHF Sinterable Insulation Film – Built for Extreme Electrical Reliability

Designed for next-generation motor and magnet-wire insulation, our Double-Sided FEP Coated Polyimide Film (FHF) delivers 165 MPa tensile strength, 86% elongation, and a 7.8 N/25mm heat-fusion bond, forming a seamless oil-proof, waterproof, and chemical-resistant insulation layer after sintering.

• Structure: FEP / Polyimide / FEP

• Performance: Exceeds JB/T 2226-96 by 34%+

• Application: Class H/C motor insulation, magnet wire sintering, deep-well pump motors

Product Overview

The FHF & FH Series FEP Coated Polyimide Film, manufactured by Shenzhen Teflon New Material Technology Co., Ltd, is a premium high-temperature, high-dielectric insulation composite engineered for the most demanding electrical applications.

By laminating chemically inert FEP resin onto high-performance Polyimide (PI) film, this composite provides:

• High mechanical strength

• Excellent dielectric stability

• Heat-bonding capability

• Exceptional resistance against oil, moisture, solvents, and corona discharge

This makes it the preferred insulation material for submersible motors, traction motors, inverter-duty motors, aerospace wiring, and high-reliability magnet wire production.

Why Our FHF Film Performs Better — Verified by 2025 Test Report

Your latest testing data significantly outperforms standard market PI+FEP films. Below:

1. Ultra-High Mechanical Strength

Measured Tensile Strength:165 MPa
 106% higher than standard requirements (≥80 MPa)

This extreme strength resists tearing during high-speed wrapping, dramatically reducing:

• Film breakage

• Machine downtime

• Material waste

Especially crucial for magnet-wire sintering and motor slot insulation.

2. Exceptional Flexibility & Durability

Elongation at Break:86%
→ Absorbs mechanical shock without stress fractures

Ensures smooth operation even under:

• Tight wrapping angles

• High-tension winding

• Fast lamination cycles

3. Perfect Sintering Bond – Hermetic Seal Formation

Thanks to uniform FEP coating, the material achieves:

Peel Strength:7.8 N/25mm (above 6.0 standard)

When heated, FEP resin melts and fully fuses, creating:

• Waterproof insulation

• Oil-resistant wrap

• Chemical-proof barrier

• Hermetic (zero-leak) bond layer

Ideal for deep-well pump motors, where insulation must survive hot oil, moisture and pressure.

4. High Dielectric Strength for Voltage Safety

Dielectric Strength:168 MV/m
→ 34% higher than standard requirement

Allows:

• Thinner insulation structures

• Higher power density

• Better reliability in HV windings

Suitable for Class H / Class C insulation systems.

5. Thermal & Electrical Stability at Elevated Temperatures

At 200°C,Film shows:

Volume Resistivity:1.4 × 10¹⁴ Ω·m
(Industry standard ≥ 1.0 × 10¹³)

This ensures:

• Lower leakage current

• Better thermal endurance

• Stable insulation life under extreme heat

Structure Variants

FHF – Double-Sided FEP Coating

• PI film coated with FEP on both sides

• Best adhesion, best electrical stability

• Ideal for magnet wire and slot liner insulation

FH – Single-Sided FEP Coating

• Cost-effective option

• Suitable for lamination / composite build-ups

3. Technical Specifications

4. Applications

Submersible Pump Motors

Oil-resistant, moisture-proof electrical insulation for demanding pump environments.

Wind Power & Traction Motors

High-stress generator/motor windings that require maximum electrical stability.

Magnet Wire Production

Uniform sintering ensures smooth coating and excellent bonding to conductors.

Aerospace & Military Wiring

Lightweight, high-temperature and chemically inert insulation system.

Electric Vehicle Motors

Stable insulation under high-frequency inverter stress.