Corona Resistant (CR) Polyimide Film
Engineers designed Corona Resistant (CR) Polyimide film to withstand the damaging effects of “corona.” It offers robust protection in high-voltage environments. Corona can cause ionization and eventual breakdown of insulation material or systems when voltage stress reaches a critical level.
- Corona Resistant
- Excellent electrical properties
- High-Temperature Resistance
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CORONA RESISTANT POLYIMIDE FILM DETAILS
Corona Resistant (CR) polyimide film offers superior resistance to coronal partial discharge compared to traditional polyimide films. It maintains excellent physical, electrical, thermal, and chemical resistant properties typical of polyimide films. Also, you can coat CR polyimide film with a pressure-sensitive adhesive. Coating with an FEP fluoropolymer creates FCR polyimide film, expanding its versatility and application range.
SPECIFICATIONS
| Product Number | Corona Resistant Polyimide Film Thickness | Tensile Strength psi | Elongation(%) | Dielectric Strength v/mil |
| CGS-7658(1 mil) | 1 Mil | 24,000 | 40 | 6000 |
| CGS-7658(2 mil) | 2 Mil | 24,000 | 40 | 5000 |
APPLICATIONS
CR polyimide film serves as an electrically insulating material in high-voltage environments prone to corona discharge. Additionally, it provides excellent protection against ionization and material breakdown, ensuring reliable performance. Typically, industries use it for magnet wire, turn-to-turn strands, coils, slot liners, and ground insulation materials in motor and generator applications. Its robust properties ensure reliability and performance in demanding conditions.
Corona-resistant CR Kapton polyimide film is widely used in electrical applications such as coil insulation, capacitor and transformer wrapping, and magnetic wire insulation.
Additionally, you can coat the film with heat-fusible FEP fluoropolymer on one or both sides, creating FCR polyimide film. This variant offers the excellent physical, electrical, thermal, and chemical resistance characteristics expected of polyimide films. Specifically, FCR019 has been developed for use as magnet wire insulation in rail traction, industrial motors, and generators, where enhanced insulation life under partial discharge environments is essential.
Common Applications Include:
- AC Inverter Duty Motors
- Rail and Automotive Traction Motors
- Hydro and Wind Power Generators
- Transformers
- Magnet Wire
The robustness and versatility of CR Kapton polyimide film make it an ideal choice for these demanding applications.
