1 Mil Polyimide Film

1 Mil Polyimide Film – Manufacturer, Supplier & Exporter in India

1 Mil Polyimide Film is a thin, yellow coloured high-grade polymer film designed for use in applications requiring absolute electrical insulation and thermal stability. This film, which measures 1 mil thick (25 microns / 0.001 inch) thick in nominal value, offers superior dielectric strength, excellent physical strength, chemical inertness and the capacity to function continuously in a wide range of temperatures from cryogenic conditions up to over 400°C.

Harnawa Insulations is a premier manufacturer, supplier and exporter of 1 Mil Polyimide Film in India. These films are supplied to our customers all over India as well as to other markets. Quality control standards during production ensure that these films have the same thickness, dielectric strength and reliability batch after batch. These films are often used in conjunction with our other Class-H insulating materials like Aramid Papers and Fiberglass Insulation Sleeves in order to provide insulation to motors, transformers and cables.

Product Overview

Key Features & Benefits

1 Mil Polyimide Film also has a Class H temperature rating that matches those of our Insulation Tapes (High Temperature) product line, ensuring that integration into tape-insulated designs is straightforward.

• Superior Heat Resistance – Capable of enduring continual exposure to extremely high temperatures and cold temperatures without deteriorating; thus, suitable for Class H and Class C electrical insulation systems.
• Excellent Electrical Insulation – It has a good dielectric strength and a minimal dielectric loss, which helps it to perform safely and efficiently in high voltage and frequency applications.
• Mechanical Strength – In spite of having a thin gauge, it possesses excellent mechanical properties like high tensile strength, tear resistance and flexibility enabling it to withstand slitting, die cutting, winding without breaking.
• Chemical and Solvent Resistance – Resistant to most of the acids, solvents and oils and thus possesses a long operational lifetime even in harsh industrial environment.
• Dimensional Stability – Dimensionally stable even when exposed to temperature fluctuations; thus, ensuring that no insulation failure occurs.
• Flame Resistance – Self-extinguishing property gives an additional advantage to it in electrical/electronic components.
• Lightweight & Thin Gauge – A thin gauge of 1 mil makes it perfect for space-saving design like FPCs and flexible cables.

Applications

Application areas for the 1 Mil Polyimide Film include:

• Flexible printed circuit boards (FPCBs) and flexible circuits
• Insulating motor windings, coils, and transformers
• Insulating slot liners and phases in electric motors and generators
• Masking tape for high-temperature wave and reflow soldering
• Insulating wires and cables
• Capacitor dielectrics
• Aerospace, EV battery, and high-temperature wiring insulation
• Insulating sensor and heater elements
• Insulation for membrane switches and touch panels

Used in conjunction with our Fiberglass Insulated Cables including those with PTFE & Silicone insulations, the 1 Mil Polyimide Film is often employed as the wrap insulation for dielectric protection in conductor assembly at high temperatures. In motors and generators as the slot and phase insulation, it works well with our Laminated Insulation Paper Composites including NMN and AHA laminates, where the addition of an extra polyimide film improves the dielectric properties.

Browse Related Insulation Products: Insulation Tapes (High Temperature) and Polyimide Tape – Kapton Tape.

Industries We Serve

Harnawa Insulations offers 1 Mil Polyimide Film to an array of industries, such as:

• Transformer and Coil Building
• Motor Manufacturing
• Generator Manufacturing
• Manufacture of Electric Vehicles (EVs)
• Capacitor Manufacturing
• High Temperature Industrial Applications
• Aerospace and Defence Electronics
• Consumer Electronics and Flexible PCB Manufacturing

However, in case of more robust winding and slot insulations in the above industries, many customers rely on our other product line – Aramid Papers, due to their greater thickness in terms of mechanical properties needed for motor and transformer construction. For further details regarding our target industries, see the Industries page.

Why Choose Harnawa Insulations as Your 1 Mil Polyimide Film Manufacturer, Supplier & Exporter in India?

Direct Manufacturer & Trusted Supplier – Consistency in quality, processing and availability of the material in bulk and custom slitting orders.

PAN India & Global Exports – We produce, distribute and export 1 Mil Polyimide Film to all parts of India and the world, through a strong logistics and dispatch network.

Quality Assurance System – We have an ISO 9001:2015, UL, CE, ROHS and REACH certification for our processes and products.

Custom Slitting & Sizing – Films delivered to you in customized sizes depending upon your production line specifications.

Technical Support – Our technical team supports you in choosing the right thickness of film according to the voltage class and temperature.

Competitive Pricing – Competitive pricing directly from the manufacturer.

More Information – Please go through “About us” or “Services” for more information.

Frequently Asked Questions (FAQs)

1.What is 1 Mil Polyimide Film used for?

1 Mil Polyimide Film is primarily used for electrical insulation in motors, transformers, and generators, as well as in flexible printed circuits, high-temperature masking tape, wire wrapping, and capacitor dielectrics, wherever a thin, heat-resistant, and electrically insulating film is required.

2.What does “1 mil” mean in polyimide film thickness?

“Mil” is a unit of thickness equal to one-thousandth of an inch (0.001″). 1 mil is approximately equal to 25 microns (25.4 µm), making it one of the thinner gauges in our polyimide film range.

3.What is the maximum temperature 1 Mil Polyimide Film can withstand?

The film offers a wide operating temperature range, performing reliably from cryogenic temperatures up to 400°C and above for short-term exposure, making it suitable for Class H and Class C insulation systems.

4.Is Harnawa Insulations a manufacturer or a trading supplier of polyimide film?

Harnawa Insulations manufactures, supplies, and exports polyimide film and other electrical insulation materials directly to customers in India and abroad, ensuring consistent quality control from processing through to dispatch.

5.Can the film be custom slit to specific widths and lengths?

Yes. We offer custom slitting and roll sizing for 1 Mil Polyimide Film based on your specific application and production line requirements. Share your specifications via our Contact Us page.

6.Does Harnawa Insulations export 1 Mil Polyimide Film outside India?

Yes, we regularly export polyimide film and related insulation products to international customers, supported by our quality certifications (ISO 9001:2015, UL, CE, RoHS, REACH) and an established export logistics process.

7.What is the difference between 1 Mil and other thicknesses like 25, 50, or 125 Micron Polyimide Film?

1 Mil (≈25 microns) is our thinnest standard offering, ideal for lightweight flexible applications. For higher mechanical strength or higher voltage insulation needs, thicker options such as 50 Micron or 125 Micron Polyimide Film are recommended. Our team can help you select the right grade based on your application.

8.How do I request a sample or bulk quotation?

You can request a quote by filling out our enquiry form, emailing enquiry@harnawainc.com, or messaging us directly on WhatsApp.