Polyimide Film
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The polyimide film is to be produced by cast method, which has High temperature resistance, resistance to radiation and excellent dielectric properties, applicable to electrical insulating of the class H electric motor and other electrical equipments , and other use electrical insulating materials.
1. Appearance: Film surface is bright and clean, not due, tear, particle, bubbles, Pinhole and foreign material defects ;Edge is tidy, without damage; Films supply in rolls. 2. Size 2.1. Thickness and allowable deviation:
|
The standard thickness(um) |
25 |
40 |
50 |
75 |
100 |
125 |
175 |
200 |
|
|
The allowable deviation(um) |
+1 |
+2 |
+2 |
+2 |
+3 |
+4 |
+4 |
+5 |
+5 |
|
-1 |
-1 |
-2 |
-2 |
-3 |
-3 |
-4 |
-5 |
-5 |
Note:Supplying according to customer request with thickness 12.5-22.5 um, allowabledeviation can be negotiated by both sides. 2.2. Width: no less than 250 mm, deviation +/-1.6mm. According to the needs of the users, tape can be cut with different specifications. 2.3. Length: Supplying according to the requirement of customer. 2.4. Performance requirements
|
Serial number |
Index name |
Unit |
Index |
||||||
|
25um |
40um |
50um |
75um |
100um |
|||||
|
1 |
density |
Kg/m³ |
1425±10 |
||||||
|
2 |
tensile strength |
horizontally |
Mpa |
≥165 |
|||||
|
vertically |
|||||||||
|
3 |
elongations |
horizontally and vertically |
% |
≥40 |
≥50 |
||||
|
4 |
shrinkage rate horizontally and vertically 150℃ 400℃ |
% |
≤0.35 ≤2.5 |
||||||
|
5 |
industrial frequency electric strength 48H2～62H2 |
v/um |
≥240 |
≥200 |
≥180 |
≥160 |
|||
|
6 |
surface resistance,200℃ |
Ω |
≥1.0X1014 |
||||||
|
7 |
Volume resistance,200℃ |
Ω.M |
≥1.0X1010 |
||||||
|
8 |
Relative permittivity 48～62Hz |
- |
|||||||
|
9 |
dielectric power factor 48～62Hz |
- |
≤4.0X103 |
||||||
|
10 |
long-term heat resistance temperature index |
- |
≥180 |
||||||
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