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絕緣紙
| Index item | unit | demand |
| 1.thickness tolerance（max.） | ％ | ±10 |
| 2.density | g/cm3 | 1.0-1.2 |
| 3.tensile strength（mix.）longitudinal | Mpa | 80 |
| 4. tensile strength（mix.）traverse | Mpa | 40 |
| 5. tensile strength（mix.） traverse after folding | Mpa | A B |
| 6. tensile strength（mix.） longitudinal after folding | Mpa | 60 |
| 7.moisture content（max.） | ％ | 8 |
| 8.ash content（max.） | ％ | 1 |
| 9.electric break town strength（mix.） |
| A B |
| In oil 0.1.mm |
| 9 9 |
| 0.15-0.25mm | KV/mm | 10 10 |
| 0.30-0.35mm | 10 - | |
| 0.40-0.50mm | 9 - | |
| 10. electric break town strength（mix.） |
| |
| In are after folding |
| A B |
| 0.10-0.15mm | KV/mm | 7 7 |
| 0.20-0.25mm | 8 8 | |
| 0.30mm | 8 - | |
| 0.30-0.50mm | 7 - | |
| 11. electricity conductivity（max.） |
| 8 |
| 12.PH of water extractives | Ms/m | 6-9 |
