The miracles of science™

Select Industry

Kapton® CR

DuPont™ Kapton® CR polyimide film was developed specifically to withstand the damaging effects of partial discharge, which can cause ionization and eventual breakdown of an insulation material or system when the voltage stress reaches a critical level.


  • Electrical rotating machines
  • Electrical insulation
  • Generators
  • Traction motors
  • Transformers

Electrical Properties of Kapton® CR

Property 1 mil
Dielectric Strength, kV/mm 291
Dielectric Constant 3.9
Dissipation Factor .003
Volume Resistivity, ohm·cm 2.3 x 1016

For a complete listing of CR properties, click here .