SynTherm® – Insulating Materials Kapton® CRC polyimide film

Kapton® CRC is a polyimide film specially developed for the effects of partial discharge which may cause ionisation and possible losses of insulating materials.

Kapton® CRC combines the excellent features of Kapton® HN polyimide film with the advantages of a very glow-discharge resistant surface. Using a Kapton® CRC polyimide film improves the resistance of the insulating systems of high-voltage generators or motors significantly.

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  • rotating electrical machines
  • electrical insulation isolation
  • generators
  • traction motors
  • transformers
  • insulation of profile conductors and cables – specially in electrically highly utilized systems


  • UL liste, File Number E 39505
  • RoHS compliant acc. to 2011/65/EC

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Film thickness in µm:



Technical data

Typical mechanical properties
Property Unit of measure   Prüfmethode 
Nominal thickness  µm  25.4 ASTM D-374-94
Tensile strength longitudinal  MPa  228 ASTM D-882-91
Tensile strength transversal  MPa  228 ASTM D-882-91
Elongation at break longitudinal  70 ASTM D-882-91
Elongation at break transversal  70 ASTM D-882-91
Typical electrical properties
Property Unit of measure   Prüfmethode 
Total thickness  µm  25.4  
Dielectric strength  kV/mm  252 ASTM D-149-81
Volume resistivity  Ω x cm  >10^16 ASTM D-257-78