| No. | Item name | Unit | Test method | Index |
| 1 | Density | g/cm3 | GB/T5130 section 8.1 | (1.80-2.08) |
| 2 | Water absorption | mg | GB/T5130 section 8.2 | Refer to table 2
|
| 3 | Vertical layer direction bending strength | MPa | GB/T5130 section 5.1 | ≥340 |
| 4 | Vertical layer direction compression strength | MPa | GB/T5130 section 5.3 | ≥ (350) |
| 5 | Tensile strength | MPa | GB/T5130 section 5.7 | ≥ (300) |
| 6 | Compact strength (Simply strut-beam method) | KJ/m3 | GB/T5130 section 5.5.1 | ≥33 |
| 7 | Insulation resistance after water dipping | Ω | GB/T5130 section 6.3 | ≥5.0 × 108 |
| 8 | Mediate loss factor, 1MHz hour | ____ | GB/T5130 section 6.2 | ≤ 0.04 |
| 9 | Dielectric constant, 1MHz hour | ____ | GB/T5130 section 6.2 | ≤5.5 |
| 10 | Vertical layer direction electric strength at (90±2)ºC transformer oil | KV/mm | GB/T5130 section 6.1 | Refer to table 3 |
| 11 | Parallel layer direction striking voltage | kV | GB/T5130 section 6.1 | ≥35 |
