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SynTherm® – Insulating Materials

Kapton® HN polyimide film

The polyimide film Kapton® HN consists of polycondensed aromatic Dianhydrid and aromatic Diamin.


Kapton® HN offers a unique combination of properties at the highest level, which are recommended for many applications in numerous branches. This PI films sustains it's excellent physical, electrical and mechanical properties within a wide temperature range. For short time it is also applicable for temperatures from -269 °C to +400 °C and is used in systems of class 240 °C. It has low flamability, is self-extinguishing and has no melting point. This PI-films offers a high chemical resistance - an organic solvent is unknown up to now. It has also a high resistance to beta and gamma radiation.


This polyimide film is especially for applications with high operating temperatures for which other films are not applicable.

  • UL listed, file-number E39505
  • UL 94-V-0
  • RoHS compliant acc. to 2011/EC
Delivery forms

Film thickness in µm:
25, 50, 75, 125
(Thicknesses 7.5 and 12.5 on request)

Kapton® HN is available:

  • in tapes starting with approx. 6 mm width
  • in rolls depending on material and thickness on request


  • depth approx. 1-12 mm, distance approx. 1-10 mm
  • approx. 10 mm up to 240 mm width and 0.25 mm thickness

Polyimide film of polycondensed aromatic Dianhydrid and aromatic Diamin.

Technical data
Typical mechanical properties
Nominal thickness  Density  Tensile strength longitudinal  Tensile strength transversal  Elongation at break longitudinal  Elongation at break transversal  Shrinkage at 150 °C 
Unit of measure         Test method 
µm  25 50 75 125 ASTM D-374-94
g/cm³  1.42 1.42 1.42 1.42 ASTM D-1505-90
N/mm²  231 231 231 231 ASTM D-882-91
N/mm²  231 231 231 231 ASTM D-882-91
72 82 82 82 ASTM D-882-91
83 83 83 83 ASTM D-882-91
0.17 0.17 0.17 0.17 ASTM D-5214-91
Typical electrical properties
Nominal thickness  Dielectric strength short term AC  Volume resistivity  Dielectric constant at 1 kHz  Dielectric loss factor at 1kHz 
Unit of measure         Test method 
μm  25 50 75 125 ASTM D-374-94
kV/mm  303 240 205 154 ASTM D-149-91
Ω x m  1.5 x 10^17 1.5 x 10^17 1.4 x 10^17 1.0 x 10^17 ASTM D-257-91
  3.4 3.4 3.5 3.5 ASTM D-150-92
  0.0018 0.0020 0.0020 0.0026 ASTM D-150-92

Nomex®, Kapton®, KAPTON® sind eingetragene Marken von E.I. Du Pont de Nemours and Company