HN Polyimide Film
HN Polyimide Film manufacturer in India — Harnawa Insulations Pvt Ltd. Kapton-type PI film with dielectric strength up to 6000 V/mil, operating range -269°C to 400°C. Available HN-05 to HN-10 (0.5 mil to 10 mil). CE, Mil-P-46123, RoHS certified. Custom sizes, bulk supply, pan-India delivery.
Description
Harnawa Insulations Private Limited is a leading Kapton polyimide film manufacturer in India, supplying the complete HN series of polyimide film (HN-05 to HN-10) for electrical insulation, flexible circuits, aerospace, automotive and industrial applications. Our HN polyimide film is a direct equivalent to Kapton HN film — the same PMDA-ODA chemistry, same dielectric strength up to 6000 V/mil, same operating range of -269°C to 400°C. Available in bulk rolls, custom slit widths and standard 520 mm width with pan-India delivery and export capability.
Whether you are searching for kapton film, PI film, or polyimide insulation film for motors, transformers, flexible PCBs or aerospace wiring — Harnawa supplies all grades directly from our Bhiwandi facility with no middlemen and fast lead times of 2–5 working days.
What is Kapton Polyimide Film?
Kapton polyimide film (also called PI film or polyimide insulation film) is a high-performance polymer film manufactured through the polymerization of pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA). “Kapton” is DuPont’s registered trade name for this material — the generic industry name is polyimide film or PI film. The patent for Kapton has long expired, and manufacturers worldwide now produce equivalent polyimide films to the same specifications.
Polyimide film offers an outstanding balance of physical, chemical and electrical properties across an extreme temperature range. It has been successfully used in applications at temperatures as low as -269°C and as high as 400°C — a range no other flexible insulation film can match. This is why kapton-type polyimide film remains the industry standard for Class H and Class C motor and transformer insulation, flexible printed circuits and aerospace wiring worldwide.
| Thermal Stability | Continuous operation from -269°C to 400°C with excellent thermal aging resistance |
| Dielectric Strength | Superior electrical insulation — dielectric strength up to 6000 V/mil (236 kV/mm) |
| Mechanical Properties | High tensile strength up to 170 MPa with excellent flexibility and elongation |
| Chemical Resistance | Resistant to solvents, oils, acids, alkalis and radiation |
| Flame Retardancy | Self-extinguishing, UL 94 V-0 rated, halogen-free, RoHS/REACH compliant |
Kapton Polyimide Film vs Standard PI Film — What is the Difference?
There is no material difference. Kapton film is DuPont’s brand name for PMDA-ODA polyimide film. When buyers in India search for “kapton film”, “kapton polyimide film”, “kapton type film” or simply “PI film”, they are all referring to the same material. Harnawa’s HN Polyimide Film is manufactured to equivalent specifications — same PMDA-ODA chemistry, same dielectric strength, same temperature range. The advantage of sourcing from Harnawa is direct manufacturing pricing, pan-India supply from Bhiwandi, and no DuPont import premium.
For technical comparison, the internationally recognised standard for this material is DuPont Kapton HN. Our HN polyimide film meets or exceeds the published Kapton HN datasheet values for all key parameters.
Polyimide Film Types & Grades — Full Range
Harnawa manufactures the complete range of polyimide film grades. HN Series (highlighted below) is the standard general-purpose kapton-type PI film. Other grades are engineered for specific applications:
| Grade / Series | Type Code | Description & Key Use |
| HN Series — This Product | Standard | General purpose kapton-type polyimide film, 0.5–10 mil. High dielectric strength, high-temperature and chemical resistance. Direct equivalent to Kapton HN. |
| FEP Coated Film | FH / FHF | FEP fluoropolymer coated polyimide film — one or both sides — for heat sealability, moisture barrier and enhanced chemical resistance. |
| Black PI Film | BX / BY / BL | Opaque black polyimide film, light-blocking, 13–125 μm. Excellent EMI shielding for hi-temp tape, labels and coverlay. |
| ESD PI Film | Functional | Anti-static polyimide film for PCB protection during wave soldering. ESD surface resistance: 10⁵–10⁹ Ω. No adhesive residue. |
| Aluminized PI Film | Functional | Sputtered aluminium on polyimide film for EMI shielding and thermal conductivity. Thickness: 25–250 μm. |
| CR Film | CR / FCR / FCRF | Corona Resistant polyimide film with ≥80 hr corona resistance. For inverter duty motors and VFD-fed equipment. |
| Thermal-Conductive | MT Series | Polyimide film with enhanced thermal conductivity (>0.36 W/m·K) for LED modules, power electronics and EV batteries. |
| NHN Composite | Laminate | Non-woven paper / polyimide film / non-woven paper laminate. 0.15–0.35 mm. Breakdown voltage: 8–10 kV. |
| Colourful PI Film | Specialty | Red, Green and Transparent polyimide film — colour-stable at high temperature. 25–50 μm. |
| Voice Coil Film | Specialty | High dimensional stability polyimide film for loudspeaker voice coil formers. 25–125 μm. |
Typical Applications of Kapton Polyimide Film
- Motor & transformer insulation
- Magnet wire coating
- Slot liners & phase insulation
- Cable & wire wrapping
- Inter-winding insulation
- Generator insulation
- FPC substrates (FCCL)
- Coverlay films
- Flexible heaters
- Electronic component mounting
- PCB solder masking
- Space suit radiation protection
- Satellite insulation
- Aircraft wiring
- Thermal protection systems
- Cryogenic applications
- Voice coil frames (speakers)
- EMI shielding
- High-temperature labels & tape
- EV battery insulation
- Solar panel backsheet
HN Polyimide Film — Kapton Type Specifications
The HN designation — same as Kapton HN — refers to the standard amber-coloured PMDA-ODA polyimide film that is the global baseline for PI film performance. HN polyimide film is produced as a smooth, amber-coloured, translucent sheet. Unlike most polymer films that soften or degrade at elevated temperatures, HN polyimide film maintains its electrical, mechanical and dimensional properties from cryogenic temperatures (-269°C) all the way up to 400°C.
HN Series spans from HN-05 (0.5 mil / 12.5 μm) to HN-10 (10 mil / 250 μm). Dielectric strength ranges from 6000 V/mil for thin grades down to 3000 V/mil for thick grades — all with the same 24,000 psi tensile strength throughout the range. This consistency is a key advantage of kapton-type polyimide film over other insulation materials.
Key Features & Benefits
- Kapton-Equivalent Performance: Direct replacement for DuPont Kapton HN — same PMDA-ODA chemistry and all published performance values
- High Dielectric Strength: Up to 6000 V/mil — reliable high-voltage electrical insulation
- Widest Temperature Range: -269°C to +400°C continuous — no other flexible film matches this range
- High Tensile Strength: 24,000 psi (165 MPa) — consistent across all thickness grades
- Chemical Resistance: Resistant to solvents, oils, acids and most industrial chemicals
- Dimensional Stability: Shrinkage ≤1.0% at 150°C, ≤3.0% at 400°C
- Flame Retardant: Self-extinguishing, UL 94 V-0 rated, halogen-free
- RoHS / REACH Compliant: Safe for export to EU, USA and global markets
Technical Specifications — HN Polyimide Film
| Material | Polyimide (PI) — PMDA-ODA type, Kapton HN equivalent |
| Continuous Use Temperature | 220°C – 240°C (short-term up to 500°C) |
| Volume Resistivity (20°C) | ≥1×10¹⁵ Ω·cm |
| Dielectric Constant | 2.0–3.9 (50Hz–1MHz) |
| Dissipation Factor | ≤0.004 (48–62Hz) |
| Density | 1.42 ± 0.2 g/cm³ |
| Shrinkage at 150°C / 400°C | ≤1.0% / ≤3.0% |
| Color | Amber / Transparent Brown |
| Standard Width / Roll Length | 520 mm / 1500 m (custom available) |
| Flame Rating | UL 94 V-0, Halogen-Free |
| Certifications | CE, Mil-P-46123, RoHS/REACH, ISO 9001, ISO 14001 |
Available Sizes — HN Polyimide Film Full Range
Harnawa stocks the complete HN series of kapton-type polyimide film from 0.5 mil to 10 mil. All grades share the same 24,000 psi tensile strength; dielectric strength varies by thickness as shown below:
| Product No. | Thickness | Tensile Strength | Elongation | Dielectric Strength |
| HN-05 | 0.5 mil (12.5 μm) | 24,000 psi | 40% | 6000 V/mil |
| HN-1 | 1 mil (25 μm) | 24,000 psi | 45% | 6000 V/mil |
| HN-2 | 2 mil (50 μm) | 24,000 psi | 50% | 5000 V/mil |
| HN-3 | 3 mil (75 μm) | 24,000 psi | 50% | 4500 V/mil |
| HN-5 | 5 mil (125 μm) | 24,000 psi | 50% | 3500 V/mil |
| HN-7 | 7 mil (175 μm) | 24,000 psi | 50% | 3300 V/mil |
| HN-10 | 10 mil (250 μm) | 24,000 psi | 50% | 3000 V/mil |
Custom slit widths and roll lengths are available on request. Contact us for MOQ and bulk pricing on kapton polyimide film.
Certifications & Compliance
CE ListedEuropean Conformity — required for all EU market sales
Mil-P-46123Type 1, Item A — US Military performance specification
RoHS CompliantRestriction of Hazardous Substances — EU directive
REACH CompliantEU Chemical Safety regulation for export markets
UL 94 V-0Highest flame retardancy rating — self-extinguishing
ISO 9001International quality management system certification
ISO 14001Environmental management system certification
Halogen-FreeNo chlorine, fluorine or bromine — safe for all markets
Why Buy Kapton Polyimide Film from Harnawa Insulations?
Manufacturer — Not a Trader
We manufacture kapton-type HN polyimide film directly. No middlemen — better pricing, faster lead times and direct technical support.
Complete PI Film Range
HN, FEP, Black, ESD, CR, NHN, Aluminized, Thermal-Conductive, Colourful and Voice Coil — all polyimide film grades from one manufacturer.
Custom Sizes Available
Custom slit widths and roll lengths to your exact specifications for OEM and production requirements.
Certified Quality
CE, Mil-P-46123, RoHS/REACH, ISO 9001, ISO 14001. Full certification documentation with every order.
Pan-India Supply
Fast dispatch from Bhiwandi to Mumbai, Pune, Delhi, Bangalore, Chennai, Hyderabad, Ahmedabad and all major cities.
Export Ready
Exporting kapton-type PI film to USA, UK, UAE, Germany, Singapore, Malaysia and more with complete documentation.
Supply & Packaging
- Standard Width: 520 mm | Custom slit widths available
- Roll Length: 1500 m standard | Custom lengths available
- Packaging: Rolls on plastic/cardboard cores, wrapped in polyethylene film
- Storage: 15°C–30°C, 40%–70% RH, away from sunlight
- Shelf Life: 24 months from manufacture date
- Lead Time: 2–5 working days (standard) | 7–14 days (custom orders)
Related Polyimide Film Products
- FEP Polyimide Film — FEP coated kapton-type film, heat sealable, FH / FHF series
- Black Polyimide Film — Opaque black PI film for light blocking and EMI shielding
- ESD Polyimide Film — Anti-static PI film for PCB protection
- Corona Resistant Polyimide Film — CR PI film for inverter duty motors
- NHN Polyimide Composite Film — PI/non-woven laminate for motor slot insulation
- Thermal Conductive Polyimide Film — MT Series for heat dissipation
- Aluminized Polyimide Film — Metallized PI film for EMI shielding
- Colourful PI Film — Colour-stable polyimide film in red, green and transparent
Frequently Asked Questions — Kapton Polyimide Film
What is kapton polyimide film and what is it used for?
Is your HN polyimide film the same as Kapton HN?
What is the difference between kapton film and polyimide film?
What is the maximum temperature kapton polyimide film can handle?
What thicknesses of kapton-type polyimide film are available?
What is the price of kapton polyimide film in India?
Do you supply custom widths of polyimide film?
What certifications does your kapton-type polyimide film carry?
About Harnawa Insulations Private Limited
Harnawa Insulations Private Limited is a manufacturer of kapton polyimide film and polyimide products based in Bhiwandi, Maharashtra, India. We supply the complete range of PI films — HN (kapton type), FEP, Black, ESD, CR, NHN, Aluminized, Thermal-Conductive, Colourful and Voice Coil — to motor manufacturers, transformer OEMs, electronics companies and PCB fabricators across India and internationally.
polyimidefilms.com is owned and maintained by Harnawa Insulations Private Limited. For bulk pricing, OEM supply and export enquiries contact enquiry@harnawainc.com or visit harnawainc.com. You can also reach us on IndiaMART where we are listed as a verified supplier of kapton polyimide film.
Find your right polyimide products with us!
You have questions according to our products or want to send an inquiry? Our sales representative will be happy to help you.
- enquiry@harnawainc.com
- +91 7276671876
- info@harnawainc.com
- +91 8879811876
