Corona Resistance polyimide Film (Kapton CR, FCR)
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Corona resistance polyimide films ,not only with ordinary polyimide film electrical properties, good heat resistance and resistance chemicals, but also with the super corona resistance and good thermal conductivity performance, mainly apply to sintering electromagnetic winding wire ,traction motor, wind generators, and the special motor turn-to-turn insulation and heat insulation, the heat resistance level is a class C.
The technical requirements
- CR type: Corona resistance polyimide film without any coating FCR type: Corona resistance polyimide film with F46 single side coating FCRF type: Corona resistance polyimide film with F46 double side coating
- its appearance is golden brown, translucent, the surface is bright and clean, no wrinkles, tear, particles, bubble, pinhole and foreign material defects. Its edge is tidy, and without damage. 3. Thickness and allowable deviation
|
Model |
CR type |
FCR type |
FCRF type |
|
Thickness(um) |
25 |
38 |
50 |
|
Allowable deviation(um) |
±2 |
±3 |
±3 |
Note: coating thickness may be based on customer demand in 5 ~ 12.5 um range regulation.4. Width and allowable deviation Width may cut according to the customer request within 600 -1050 mm. Each volume length is for 500-1000 m; Each volume joints for final product are not more than three, the proportion of volumes with joints vs the total volumes number in the one order is not more than 25%,the shortest length is more than 300 m; Single plate or roll products joint numbers are not more than three, the shortest length is more than 300 m. FCR type and FCRF type using thermal bonding lap. 5. Film marks: -Every single volume label marked: batch number, specification, net weight;Every single plate or roll labeling: specification. -Package should have obvious and firm mark; -The format of the packing cases is confirmed by purchase order related terms.
|
Serial Number |
Type |
CR |
FCR |
FCRF |
|
1 |
Corona resistance life (h) 1 KV voltage, frequency 20 KHz temperature 90 ℃ ±2 ℃ pulse rise time 400 ns |
≥80 |
≥80 |
≥80 |
|
2 |
Industrial frequency electric intensity (v/um) |
≥200 |
≥120 |
≥100 |
|
3 |
Surface resistivity (Ω) |
1X1014 |
1X1014 |
1X1014 |
|
4 |
Volume resistivity (Ω. Cm) 1 |
1X1010 |
1X1010 |
1X1010 |
|
5 |
Relative permittivity (48-62 Hz ac) |
|||
|
6 |
Dielectric power factor (48-62 Hz ac) |
≤3.5X10-3 |
≤3.5X10-3 |
≤3.5X10-3 |
|
7 |
Tensile strength (Mpa) : |
≥135 |
≥80 |
≥80 |
|
8 |
Elongation at break (%) |
≥40 |
≥40 |
≥40 |
|
9 |
Hot shrinkage rate (%) 150 ℃,0.5h 400℃， 0.5h |
≤1.0 ≤3.0 |
≤1.0 ≤3.0 |
≤1.0 ≤3.0 |
Note:
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