CR Corona Resistant Polyimide Film
Specification
CR polyimide film was developed specifically to withstand the damaging effects of “corona”, which can cause ionization and eventual breakdown of an insulation material or system when the voltage stress reaches a critical level. Corona resistant polyimide film has preserved the physical, mechanical property of polyimide film as it does, as well as the outstanding corona-resistant property.
Features：
CR polyimide film has preserved the physical, mechanical property of polyimide film as it does, as well as the outstanding corona-resistant property. environment-friendly with halogen-free, highest UL-94 flammability rating: V-0。
Parameters
Property | Unit | CR25 | CR50 | Test Method | |
Thickness | μm | 25±3 | 50±3 | ASTM D374 | |
Width | mm | 520 | ASTM D374 | ||
Tensile Strength | MD | Mpa | ≥125 | ≥125 | ASTM D882 |
TD | Mpa | ≥110 | ≥110 | ASTM D882 | |
Elongation | MD | % | ≥30 | ≥30 | ASTM D882 |
TD | % | ≥40 | ≥35 | ASTM D882 | |
Dielectric Strength | KV | ≥4.0 | ≥5.0 | ASTM D149 | |
Dielectric Constant | - | ＜3.6 | ASTM D150 | ||
Corona Resistant Performance | - | electric current 6 Am, up to 290ns, breakdown time 483min | |||
Remark: The above data are for reference only
Pictures
Application
Wind power generator, variable frequency motor, traction motor, electrical rotating machine, high voltage transformer , magnetic wire wrap, super high-voltage cable insulation.