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The polyimide film is a "casting method" production. It’s suitable for class H motor, electrical insulation and other electrical insulation materials for its high temperature resistance, radiation and excellent dielectric properties.
Dimension
1, Thickness and tolerance(μm )
Standard thickness | 25 | 40 | 50 | 75 | 100 |
Tolerance | +2 | +2 | +2 | +2 | +3 |
-1 | -1 | -1 | -2 | -2 |
Note: we can also supply 125-225μm according to users’ requirements.
2,Width: ≥250mm, tolerance ±1.6mm. We can tailore different width according to users’ need.
3,Length: we can supply 1000m-2000m according to users’ need.
4,Performance requirements
NO. | Index name | Unit | Index value | ||||
25 μ m | 40 μ m | 50 μ m | 70 μ m | 100 μ m | |||
1 | Density | Kg/ m3 | 1.400×103 ±0.02 | ||||
2 | Tensile strength | MPa | Longitudinal: ≥ 135 Horizontal: ≥ 115 | ||||
3 | Break elongation | % | Longitudinal and Horizontal: ≥ 35 | ||||
4 | Shrinkage rate | % | Longitudinal and Horizontal 150°C : ≤ 1.0 400°C: ≤ 3.0 | ||||
5 | Frequency electrical strength | Mv/m | Average value: ≥ 150 ≥ 130 ≥ 110
Individual value: ≥ 100 ≥ 80 ≥ 70 | ||||
6 | Surface resistor value 200°C | Ω | ≥ 1.0×1013 | ||||
7 | Volume resistor value 200°C | Ω.M | ≥ 1.0×1010 | ||||
8 | Relative permittivity 48 ~ 62Hz |
| 3.5±0.4 | ||||
9 | Dielectric loss factor 48 ~ 62Hz |
| ≤ 4.0×10-3 | ||||
10 | Long-term heat resistance temperature index |
| ≥ 180 | ||||