Indicator name | Unit | Index value |
Nominal thickness | um | 25 | 40 | 50 | 75 | 100 | 125 |
Thickness deviation | um | +4 | +4 | +7 | +8 | +7 | +11 |
| -3 | -4 | -6 | -6 | -7 | -7 |
Tensile strength (vertical / lateral) | um | 165 | 165 | 165 | 165 | 165 | 165 |
Elongation at break (vertical/lateral) | % | 40 | 50 | 50 | 50 | 50 | 50 |
AC electrical strength (48Hz-62Hz) | V/um | 235 | | 195 | 175 | | 120 |
Slitting width | range | mm | Allowable deviation |
<26 | | ±0.4 |
26~102 | | ±0.8 |
>102 | | ±1.6 |
density | kg/m3 | 1425±10 |
Melting point | - | Not melting |
Relative permittivity 23 ° C | 50Hz | - | 3.5±0.4 |
| 1KHz | | 3.4±0.4 |
Dielectric loss factor 23 ° C, 50 Hz or 1 Hz | - | ≤4.0×10-3 |
Volume resistivity | Ω·m | ≥1.0×1010 |
Surface resistivity | Ω | ≥1.0×1014 |
Dimensional stability (longitudinal and transverse shrinkage) (required only for thickness ≥25μm) | 150ºC | % | ≤0.35 |
400ºC | | ≤2.5 |
Water absorption (wet 24h) | % | ≤4.0 |
Long-term heat resistance temperature index | ºC | ≥200 |