Harnawa Insulations Private Limited

Polyimide film is a special plastic film, has excellent mechanical properties, dielectric properties, flame does not melt at -195 °C to 280 °C under the conditions of long- term use. Because of its unique high performance main as the base dielectrics for Flexible Printed Circuits (FPC), Tape Automated Bonding (TAB), Pressure Sensitive Tape (PST), Insulation for Electric Motors, Transformers etc., it is widely used in sophisticated product of military affairs, satellite navigation, digital product, 'H' Class and 'F' Class grade electric motors, computer and mobile phone etc.

FEP Polyimide Film is a high-performance, heat-bondable electrical insulation film made by laminating polyimide base film with a thin layer of FEP (Fluorinated Ethylene Propylene) copolymer on one or both sides. This hybrid structure provides outstanding thermal endurance, excellent dielectric strength and superior chemical resistance. Once heated above the melt temperature of FEP, the film becomes heat-sealable and forms strong bonds with metals, coils, conductors and insulating substrates.

FEP Polyimide Film is used in motors, high-temperature coils, aerospace electronics, EV motors, transformers and applications requiring exceptional durability and bonding strength. It maintains stable performance from cryogenic temperatures up to Class H (180°C) and beyond, making it suitable for extreme electrical and environmental conditions. The FEP coating gives the film moisture resistance, low friction, high chemical resistance and the ability to create hermetic seals.

Key Features
• Polyimide base film coated with FEP on one or both sides
• Class H (180°C) high-temperature insulation
• Heat-bondable above FEP melt temperature (~250°C)
• Excellent dielectric strength and electrical stability
• Wide temperature range: −200°C to +200°C continuous
• Outstanding chemical, moisture and solvent resistance
• Self-bonding capability after heat activation
• Dimensional stability and good mechanical toughness
• Smooth surface suitable for precision winding

Applications
• Motor and generator insulation systems
• Slot liners and turn-to-turn insulation
• High-temperature coil bonding and wrapped conductors
• Flexible printed circuits and electronics
• EV motors and battery insulation
• Aerospace and defence electrical systems
• Transformer insulation and high-frequency coils
• Magnetic wire wrapping and torsion coils

Technical Range
• Thickness options: 12 µm, 25 µm, 50 µm, 75 µm, 125 µm
• Temperature Class: Class H (180°C)
• FEP coating: Single-side (1S) or double-side (2S)
• Width: 6 mm to 1000 mm (custom slit available)
• Available in rolls, sheets and die-cut pieces

Advantages
FEP Polyimide Film provides unmatched thermal resistance combined with heat-bonding capability, making it ideal for insulation systems requiring long service life, high strength and precise adhesion. It is widely used in advanced electrical, aerospace and EV applications where reliability and performance are critical.

FEP Coated Polyimide Film is a high-performance electrical insulation film made by coating polyimide base film with a thin, uniform layer of FEP (Fluorinated Ethylene Propylene). This coating provides exceptional heat-bonding capability, chemical resistance and moisture protection, while maintaining the thermal endurance and electrical strength of polyimide.

When the film is heated above the melting temperature of FEP (around 250°C), the coating becomes adhesive, allowing the film to bond tightly to metals, copper conductors, coils and insulation components. This makes FEP Coated Polyimide Film an ideal choice for applications requiring high-temperature bonding, wrapping, insulation sealing, and coil consolidation.

It offers excellent dielectric strength, low shrinkage, high dimensional stability and reliable performance across a very wide temperature range. FEP Coated Polyimide Film is widely used in motors, EV motors, aerospace electronics, transformers, battery packs, flexible circuits and magnetic wire insulation.

Key Features
• Polyimide film coated with FEP on one or both sides
• Heat-bondable coating activates at approx. 250°C
• Class H (180°C) continuous insulation rating
• Excellent dielectric breakdown strength
• Outstanding chemical and moisture resistance
• Wide temperature range from −200°C to +200°C
• Strong adhesion after heat activation
• Smooth, flexible and dimensionally stable
• Suitable for precision winding and coil wrapping

Applications
• High-temperature motor and generator insulation
• Coil bonding and heat-sealed insulation wrapping
• EV motors and battery module insulation
• Aerospace electrical systems
• PCB insulation and flexible electronics
• Specialty tapes, bonding laminates and magnet wire covering
• Transformer layer insulation and high-frequency windings

Technical Range
• Thickness: 12 µm, 25 µm, 50 µm, 75 µm, 125 µm
• FEP Coating Options: Single-side (1S) or Double-side (2S)
• Temperature Class: Class H (180°C)
• Bonding Temperature: approx. 250°C
• Width: 6 mm to 1000 mm (custom slit available)
• Supplied in rolls, sheets or die-cut components

Advantages
FEP Coated Polyimide Film combines the thermal endurance of polyimide with the heat-bonding and chemical resistance of FEP, making it ideal for highly demanding electrical and electronic insulation systems. It ensures strong adhesion, long service life and excellent reliability in harsh operating conditions.

Polyimide Film is a high-performance electrical insulation film known for its exceptional thermal stability, mechanical strength and dielectric performance. It is widely used in motors, transformers, generators, EV motors, high-frequency coils and electronic applications that require reliable Class H (180°C) insulation. Polyimide Film maintains its properties over a wide temperature range and performs consistently under extreme thermal and electrical conditions.

Manufactured from aromatic polyimide polymers, the film exhibits excellent heat resistance, chemical stability and mechanical durability. It does not melt, shrink or degrade under high temperatures, making it suitable for inverter-duty motors, high-speed windings, PCB insulation, battery packs and aerospace-grade electrical systems. Its superior dielectric strength and dimensional stability make it one of the most preferred insulation materials for demanding environments.

Polyimide Film is flexible, lightweight and resistant to solvents, oils and moisture. It offers excellent bonding with epoxy, varnish and adhesive systems, and is often used as a base layer or reinforcement in laminated insulation structures such as AHA, APA, AMA and other high-temperature composites.

Key Features
• Class H (180°C) high-temperature insulation
• Outstanding dielectric strength and electrical stability
• High mechanical toughness and tear resistance
• Excellent thermal endurance from –200°C to +200°C
• Resistant to chemicals, oils and industrial solvents
• No melting or dripping under high temperature
• Moisture-resistant and dimensionally stable
• Suitable for laminating with aramid and polyester materials
• Flexible, lightweight and durable film

Applications
• Slot liners, turn-to-turn insulation and phase insulation
• High-frequency motor and transformer windings
• EV motor insulation and battery modules
• PCB insulation, flexible printed circuits and electronics
• Aerospace and defence electrical systems
• Laminated composites (AHA, APA, AMA, polyimide-based laminates)
• High-voltage coil insulation and capacitor wrapping

Technical Range
• Thickness: 12 µm, 25 µm, 50 µm, 75 µm, 125 µm (custom options available)
• Temperature Class: Class H (180°C)
• Width: 6 mm to 1000 mm (custom slit widths)
• Forms: Rolls, sheets and die-cut pieces
• Color: Amber / Golden / Transparent polyimide finish

Advantages
Polyimide Film delivers unmatched thermal and electrical insulation performance. It ensures long service life in harsh electrical environments and is ideal for OEMs manufacturing high-temperature motors, transformers and electronic components. Its stability, durability and versatility make it a benchmark solution for premium electrical insulation systems.