125 Micron Polyimide Film – Manufacturer, Supplier & Exporter in India
If any application calls for more than just a basic protective coating, if it requires the strength of a mechanical body and voltage breakdown capability, then the engineers call for 125 Micron Polyimide Film, which is one of the heaviest gauges in our polyimides lineup. Weighing around 4.9 mil (0.0049 inch), 125 Micron Polyimide Film is designed to provide mechanical stability along with the superior electrical insulating properties.
Harnawa Insulations produces and distributes 125 Micron Polyimide Film to the manufacturers of power and electrical equipments in India and export worldwide. The heavy gauge nature of 125 Micron Polyimide Film makes it ideal where the insulation requirement is subjected to mechanical stress or voltages.
Technical Specifications
| Property | Value |
|---|
| Product | 125 Micron Polyimide Film |
| Thickness | 125 microns (≈ 4.9 mil) |
| Appearance | Amber / golden translucent |
| Polymer Base | Aromatic Polyimide (PI) |
| Continuous Operating Range | -269°C to 400°C+ |
| Thermal Class | Class H (180°C) and above |
| Insulation Type | High dielectric strength film |
| Tensile Behaviour | High tensile and tear strength for its class |
| Supply Format | Rolls, slit rolls, cut sheets |
| Sizing | Custom width/length on request |
Why the Thicker Gauge Matters
- High Breakdown Voltage Performance – The greater thickness of the film section allows for increased breakdown distance, making the 125 Micron Polyimide Film superior in terms of higher-voltage insulation performance compared to thin film sections.
- Mechanical Strength In-Built – Resistant to tearing from punching, die cutting, handling, and during installation, and hence suitable when it is used both as an insulation and structural barrier layer.
- High Thermal Stability – Approved for Class H continuous use and well beyond 400°C in short term exposures, and therefore suitable for thermal cycling applications in motors, transformers and capacitors.
- Chemical and Solvent Resistance – Immune to the effects of oils, cleaners, and varnishes used in the manufacture of electrical components.
- Flame Resistance and Low Outgassing – Self-extinguishing plastic film that provides an added margin of safety in enclosed electrical assemblies.
- Dimensional Stability – Maintains stability in terms of flatness and insulation properties through multiple thermal cycles.
Where 125 Micron Polyimide Film Is Used
Due to the extra thickness, this grade is usually recommended in cases where the film itself has to carry some mechanical or electrical load, and not just serve as a simple barrier:
- Ground wall and phase-to-phase insulation of transformers and coils
- Slot liners of high-voltage motors and generators
- Dielectric films of capacitors
- Rigid flex and flexible multi-layer circuit substrates
- Barrier insulations for busbars and switch gear components
- High-temperature gasketing and thermal barrier insulation
- Heating element insulation for industrial and household heaters
- Insulation layers of EV battery pack assemblies
In insulation systems, this film is usually used in combination with our Laminated Insulation Paper Composites, such as NMN and AHA laminates, when the polyimide film adds extra dielectric strength between aramid and paper plies. This film is also compatible with our High Temperature Insulation Tapes series for taping and binding of insulation systems during winding process.
Industry Applications
- Manufacturing of Power & Distribution Transformers
- Motor & Generator Winding
- Manufacturing of Capacitors
- Battery & Drivetrain Insulation for Electric Vehicles (EVs)
- Switchgear & Busbar Insulation
- Electrical Systems for Aerospace & Defense
- Manufacturing of Industrial Heating Elements
For high-tensile winding insulation within the same sectors, our clients also manufacture Aramid Paper for the structural part and Fiberglass Insulation Sleeves for lead wire and terminal insulation.
Sourcing 125 Micron Polyimide Film from Harnawa Insulations
- Manufactured and Supplied Directly – By manufacturing and supplying the products ourselves, we can ensure consistency in thickness tolerance and dielectric characteristics.
- Export Ready – Exportation of 125 Micron Polyimide Film is made possible through Harnawa as the exporter of the product in India and internationally, using a well-developed export procedure.
- Certified Quality – With ISO 9001:2015, UL, CE, RoHS, and REACH certification, we meet the compliance requirements expected for electrical grade films.
- Cutting and Slitting Services – The films are available in custom cut sheets and rolls according to customer requirements.
- Engineering Application Assistance – Our engineering support staff will assist in finding out the appropriate gauge of film that satisfies your mechanical and voltage needs.
Frequently Asked Questions (FAQs)
1. What is it that distinguishes 125 Micron Polyimide Film from thinner varieties such as 1 Mil or 25 Micron?
The extra thick nature of 125 Micron Polyimide Film helps to provide a longer dielectric breakdown path and greater mechanical durability; it can thus offer better insulation capabilities at higher voltages as well as in applications wherein mechanical stress is applied directly to the film. Our 1 Mil and 25 Micron Polyimide Films are more suitable for flexible circuits and wrapping.
2. Is it possible to use 125 Micron Polyimide Film in transformer insulation?
Yes, its thickness and high dielectric strength make this film an ideal choice for insulation of ground wall as well as phases in transformers and coils, often in combination with our Laminated Insulation Paper Composites in a layered insulation system.
3. What is the range of temperatures it is able to endure?
The film is able to function reliably in a very wide range of temperature extremes, both cryogenic temperatures and up to 400 degrees centigrade or even above for limited periods of time; it is suitable for insulation in Class H (180°C) systems or higher.
4. Is Harnawa Insulations a manufacturing unit or merely a trading company?
Harnawa Insulations is a manufacturer, distributor, exporter and supplier of polyimide film and electrical insulation materials; our company manufactures and processes it from start till finish before dispatching it – we are not simply a trading company.
5. Does it come in custom widths and roll lengths?
Yes, 125 Micron Polyimide Film can be provided in custom-slit rolls and sheets according to your die-cutting, winding or production line requirements. Send us your requirement on our Contact Us page.
6. Can it be exported outside India?
Yes, we export 125 Micron Polyimide Film as well as other insulation products worldwide based on our ISO 9001:2015, UL, CE, RoHS and REACH certificates.
7. Is it suitable for flexible circuit applications?
Though thin films are usually preferred in highly flexible circuits, this film is very suitable in rigid-flex circuits and substrates.
