Corona Resistant Polyimide Film

Description:

CR Polyimide Film (e.g. Kapton® CR Film) is a corona resistant film, 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 not only retains the excellent electrical, thermal, and chemical properties of general polyimide Film, but also has superior corona resistance and thermal conductivity. It enhances service life and operational efficiencies vs conventional electrical insulation materials.

Characteristics

 • Excellent Corona Resistance

 • High thermal conductivity

 • High dielectric strength

 • Longer insulation life

 • High Temperature resistance

Application:

CR Corona Resistant Polyimide Film can be punched, formed, laminated, or adhesive coated. It is widely used as electrical insulation materials where there is a need for enhanced insulation life under partial discharge environments in rail traction, industrial motors and generators, transformer, magnet wire, coils and so on.

Technical Data: 

Property	Units	CR Polyimide Film Typical Value
Film Type		100CR	150CR	200CR	300CR
Nominal Thickness	μm	25.0	38.0	50.0	75.0
Thickness Tolerance	μm	±2.5	±4.0	±5.0	±5.0
Tensile  Strength	MPa	175	170	165	155
Elongation	%	69	69	69	69
Corona  Resistance at 20 kV/mm at 50 Hz	h	> 60,000	> 60,000	> 60000	> 60,000
Dielectric Strength,	kV/mm	210	195	185	180
Volume Resistivity at 200℃	Ω.cm	1.0x1012	1.0x1012	1.0x1012	1.0x1012
Surface Resistivity at 200℃	Ω	1.0x1014	1.0x1014	1.0x1014	1.0x1014
Shrinkage, at 150°C	%	0.20	0.20	0.20	0.20

Film Roll Size: 3" paper or plastic core, film width: 6mm -1000mm; standard width: 520mm, 1000mm

※ Special thickness or combinations can be supplied according to customer.

※   Products can be supplied in roll, tape or shapes according to customer's requests.

Notes: The technical information and data, recommendations, and other statements provided are based on tests or experience which we believe to be reliable, but the accuracy or completeness of such information is not guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application. Kapton® is a registered trademark of DuPont.