polyimide film 25 micron

25 Micron Polyimide Film – Manufacturer, Supplier & Exporter in India

There are certain applications where the weight of a thick film will not be required, and an ultra-thin film is too delicate for the same job. 25 Micron Polyimide Film offers the perfect combination – a film thin enough to wrap around coils and conductors, yet thick enough to maintain consistent dielectric qualities when exposed to electrical and thermal load continually.

At Harnawa Insulations, we manufacture 25 Micron Polyimide Film, which is amongst the most popular grades of polyimides that we sell and export worldwide, to manufacturers who require a film which wraps, folds and die-cuts easily in their manufacturing units. Our 25 Micron Polyimide Film undergoes tests to check for consistency in thickness and dielectric properties.

At a Glance

What This Thickness Is Good At

Rather than being the strongest or the thinnest film we stock, 25 Micron Polyimide Film is chosen because it strikes a working compromise between three things production teams care about:

1. Wrapping without cracking Sufficiently thin to easily wrap around small diameter coils, conductors and terminal leads, but able to withstand repeated bends during manufacture.

2. Consistent dielectric qualities Despite its thinness, the film maintains the high dielectric characteristics of polyimide, ensuring effective turn-to-turn and layer-to-layer insulation in tightly wound assemblies.

3. Processing consistency Slits, punches and die-cuts cleanly in standard converting machinery, reducing scrap and rework in comparison to more fragile ultra-thin materials.

Other features of the underlying polyimide material:

• Continuous operation from cryogenic through 400°C+ temperatures
• Resistance to common industrial solvents, oils and varnishes
• Self-extinguishing and flame-resistant qualities
• Consistency of dimensions during thermal cycling

Typical Uses

• Small and medium motor coil/conductor wraps
• Capacitor winding insulations
• Insulation between adjacent layers in compact transformer windings
• Flexible printed circuit (FPC) base/cover layers
• Miniature relay/solenoid insulation barriers
• Wire harnesses & lead-wire wraps for high temperature applications
• High temperature masking/process tape backing films

In the case where the coated or insulated bundle requires mechanical protection, this coating is usually covered with our Polyimide Tape – Kapton Tape, or in cases where the wire requires a primary insulation coating before the coating process, Fiberglass Insulated Cables can be used.

Industries That Rely on This Grade

• Motor & Small to Medium Motor Manufacture
• Capacitor Winding & Manufacture
• Transformer & Coils Assembly
• Consumer Electronics & Flexible Printed Circuit (FPC) Manufacture
• Relay, Solenoid & Switch Gear Components Manufacture
• Electric Vehicle Sub-Assembly Insulation

For those occasions when a thicker structure layer is required in conjunction with this film, such as in slot liners or phase separators, for example, our customers often complement it with Laminated Insulation Paper Composites or Aramid Papers. To safeguard the leads at the termination point, Fiberglass Insulation Sleeves are often combined. See our complete Industries page for more information.

Buying 25 Micron Polyimide Film from Harnawa Insulations

• Guaranteed Uniform Thickness – Dielectric thickness consistency tested throughout the production process; guaranteed that you will get the same thickness batch after batch.
• Direct Manufacturer Supply – Rather than being traded as third-party material, this film is processed and supplied by us directly.
• Domestic and International Supply – Suitable for bulk domestic and export shipments.
• International Standard Compliant – Film produced in accordance with the ISO 9001:2015 standard, certified with UL, CE, RoHS and REACH certification.
• Flexible Roll & Sheet Formats – Custom slit rolls and sheets produced according to your winding/converting line needs, with no size specification difficulty.
• Professional Engineering Assistance – In case you are uncertain about 25 micron suitability for your voltage class and mechanical demands, we can assist you in making the right choice.

Frequently Asked Questions (FAQs)

1. How is 25 Micron Polyimide Film different from 1 Mil Polyimide Film?

The name “25 microns” is rather similar to “1 mil” as both these film types have almost the same set of parameters. However, the difference appears due to the type of units in your specification sheet (metric or imperial). In case your sheet contains such unit as mils, please refer to 1 Mil Polyimide Film.

2. Can 25 Micron Polyimide Film be used for capacitor winding?

Sure, the 25-micron polyimide film is often used as the winding film due to its thinness and constant dielectric strength.

3. Can it be used for flexible printed circuits (FPC)?

Sure, it can be used for FPC production because it is used both as a base and covering material due to its flexible properties as well as good electrical insulation.

4. What is the maximum operating temperature of 25 Micron Polyimide Film?

This film is able to operate in an extreme temperature range from cryogenic temperatures up to 400 °C and above and is qualified for Class H insulation system and above.

5. Is it possible to supply me with 25 Micron Polyimide Film of custom width for use in winding applications?

Yes, this film is available in custom width/length suitable for your winding/converting machines. Just share your needs on Contact Us page.

6. Does Harnawa Insulations manufacture/export this item to international clients?

Yes, 25 Micron Polyimide Film is regularly supplied by us to our international clients except for those from India.

7. Which other types of polyimide films should I consider if I want additional mechanical strength in my application?

If additional mechanical strength/dielectric margin is required in your application, you may try 50 Micron Polyimide Film and 125 Micron Polyimide Film.