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Kapton® HN Polyimide Disk
Available Configurations
Properties common to all products in this list
| Thickness | Diameter | Other Grades |
|---|---|---|
| 0.008mm to 0.125mm | 4mm to 50.8mm | FPC, HPP-ST, MT, B, CRC, 200RS100 |
Need custom configurations? Please contact our Technical Solutions team.
Key Features
Kapton® HN is DuPont's general-purpose polyimide film and the industry benchmark for all-round electrical, thermal, and mechanical performance — trusted across aerospace, electronics, cryogenics, and high-energy physics:
Exceptional Thermal Range (−269 °C to +400 °C)
Kapton® HN maintains its structural, electrical, and dielectric integrity across a temperature range no other polymer film can match — from deep cryogenic environments to continuous high-heat industrial service. This makes it the go-to material for aerospace wiring, cryogenic instrumentation, and space-grade thermal shielding.
Outstanding Electrical Insulation (up to 303 kV/mm)
With a dielectric strength of up to 303 kV/mm, a volume resistivity of 1.5×10¹⁷ Ω·cm, and a low, stable dielectric constant of 3.4 @ 1 MHz, Kapton® HN delivers reliable insulation in high-voltage and high-frequency applications including flexible printed circuits, transformers, and microelectronic devices.
High Mechanical Strength with Flexibility (231 MPa tensile strength, 72% elongation)
Combining tensile strength of 231 MPa with an elongation at break of 72%, Kapton® HN resists tearing and fatigue under repeated flexing — enabling use in dynamic flex circuits, robotic systems, and aerospace wire harnesses where dimensional reliability is critical.
Radiation and Flame Resistance (UL 94 V-0)
Kapton® HN's UL 94 V-0 flame rating and proven radiation tolerance make it indispensable for space systems, nuclear reactors, fusion research, and high-energy physics beam diagnostics, where safety and long-term integrity under irradiation are paramount.
Selective Chemical Resistance
Kapton® HN performs reliably when exposed to greases, fuels, aromatic hydrocarbons, and halogenated solvents, supporting its use across electronics manufacturing, lab instrumentation, and chemical processing environments.
Dimensional Stability and Low Outgassing
Kapton® HN maintains its shape and performance under thermal and environmental stress, with low outgassing, minimal moisture uptake (0.2–2.9%), and a low coefficient of friction (0.42). These characteristics make it ideal for cleanroom, vacuum, and space-grade applications where consistency is non-negotiable.
Industrial Applications
Kapton® HN is used across the most demanding industries, valued for its unmatched thermal range, dielectric strength, radiation hardness, and dimensional stability:
- ✦ Aerospace & Space Systems
- The reference-grade material for spacecraft wiring, wire insulation, and thermal blankets. Kapton® HN's resistance to extreme temperatures and ionising radiation makes it essential for avionics, satellite assemblies, re-entry shielding, and mission-critical cabling where no alternative is accepted.
- ✦ Cryogenics & High-Energy Physics
- Rated for continuous use down to −269 °C, Kapton® HN is the standard insulating film in cryogenic wiring, superconducting magnet systems, fusion reactors, particle detector windows, and beam diagnostic instruments at major physics research facilities worldwide.
- ✦ Electronics & Flexible Circuits
- Widely specified as a substrate for flexible printed circuits (FPCs), dielectric layers in capacitors, and chip-scale packaging in smartphones, computers, and high-density consumer electronics. Its flexibility and thermal stability enable compact, reliable circuit designs that withstand repeated flex cycles.
- ✦ Nuclear & Radiation-Hardened Systems
- Kapton® HN's proven radiation tolerance supports its use in nuclear reactor instrumentation, radiation-curing composite manufacturing, and any application requiring long-term structural and electrical integrity under high radiation doses.
- ✦ Automotive & Electric Vehicles
- Used in EV and hybrid vehicle battery modules, motor slot liners, sensors, and wire and cable tapes. Kapton® HN withstands the combined demands of high temperature, vibration, and chemical exposure inherent in modern automotive powertrains.
- ✦ Medical & Wearable Devices
- Biocompatible and sterilisation-resistant, Kapton® HN is used in flexible medical sensors, catheters, implantable electronics, and wearable diagnostic devices. Its thin profile and thermal stability enable compact, durable designs for continuous patient monitoring.
- ✦ Industrial & High-Temperature Manufacturing
- Applied in high-temperature masking, coil insulation, Class H electrical systems, and flexible heaters. Kapton® HN protects components reliably during soldering, thermal processing, and adhesive curing operations in demanding industrial environments.
Material Properties
| Element | Value |
|---|---|
| Acids - concentrated | Poor |
| Acids - dilute | Fair |
| Alcohols | Poor |
| Alkalis | Poor |
| Aromatic hydrocarbons | Good |
| Greases and Oils | Good |
| Halogenated Hydrocarbons | Good |
| Halogens | Fair |
| Ketones | Good |
| Element | Value |
|---|---|
| Coefficient of friction | 0.42 |
| Hardness - Rockwell | E52-99 |
| Elongation at break( % ) | Aug-70 |
| Tensile modulus( GPa ) | 2.0 – 3.0 |
| Izod impact strength( J m⁻¹ ) | 80 |
| Tensile strength( MPa ) | 70-150 |
| Element | Value |
|---|---|
| Dielectric constant @1MHz | 3.4 |
| Dissipation factor @ 1kHz | 0.0018 |
| Dielectric strength( kV mm⁻¹ ) | 154 – 303 |
| Surface resistivity( Ohm/sq ) | 10¹⁶ |
| Volume resistivity( Ohmcm ) | 10¹⁸ |
| Element | Value |
|---|---|
| Flammability | V0 |
| Radiation resistance | Good |
| Refractive index | 1.66 |
| Resistance to Ultra-violet | Poor |
| Limiting oxygen index( % ) | 53 |
| Water absorption - over 24 hours( % ) | 0.2-2.9 |
| Density( gcm⁻³ ) | 1.42 |
| Element | Value |
|---|---|
| Heat-deflection temperature - 1.8MPa( C ) | 360 |
| Lower working temperature( C ) | -270 |
| Upper working temperature( C ) | 250-320 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1090 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.1-0.35@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 30-60 |
Tolerances
| Thickness | ±20% | |
|---|---|---|
| Diameter | ±0.5mm |