Polyimide film is a special engineering plastic film with excellent mechanical properties, dielectric properties, flame retardant and infusible, and can be used for a long time under the conditions of -195 ℃ – 280 ℃. Due to its excellent and unique performance, it is mainly used as a basic material to make flexible circuit boards (FPC), high temperature tapes, electrical and motor insulation (Insulation), F. Class H motor cables, magnet wires, etc.
| Performance | Test items | Unit | Thickness Index | Test Conditions | testing method | ||
| Thickness | μm | 12.5 | 25 | 50 | 20℃ | ASTM D1505 | |
| Mechanical properties | Tensile strength | Mpa | 150 | 180 | 200 | 20℃ | JB/T 2726— 1996 |
| Elongation | % | 60 | 70 | 90 | 20℃ | JB/T 2726— 1996 | |
| Electrical | Breakdown voltage | MV/m | 170 | 200 | 200 | 60Hz, 20℃ | JB/T 2726— 1996 |
| Dielectric coefficient | 3.2 | 3.2 | 3.2 | 1MHz, 20℃ | ASTM D150 | ||
| Volume impedance | Ω•cm | >1010 | >1010 | >1010 | 500V, 20℃ | ASTM D257 | |
| Surface impedance | Ω | >1013 | >1013 | >1013 | 500V, 20℃ | ASTM D257 | |
| Hot sex | Thermal expansion | ppm/℃ | <30 | <35 | <35 | 100~200℃ | ASTM D5213-04 |
| Dimensional stability | % | <0.1 | <0.1 | <0.1 | 200℃, 2hr | JB/T 2726 —— 1996 | |
| physical properties | Density | g/cm3 | 1.420 ± 20 | 20℃ | ASTM D1505 | ||
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