| No. | Test item | Performance indexes |
|---|---|---|
| 1 | Tensile strength MPa | ≥8 |
| 2 | Elongation at break% | ≥250 |
| 3 | Shore hardness (A) | 76±5 |
| 4 | Scorch 121℃ min | ≥20 |
| 5 | Viscosity ML121℃1+4 | 55~75 |
| 6 | Aging: 90℃×24h Medium: Air (on basis of elongation) | 0.75 |
| 7 | Ozone 40℃×720h 500pphm No cracking at 20% elongation | No cracking |
| 8 | 100℃×72h 3# standard △V% | 0~100 |
| 9 | H withdrawal (Φ0.3㎜) N | ≥100 |
| 10 | Low-temperature brittleness of rubber sheet (℃) | ≤ -30℃ |
| 11 | Low-temperature of hose | -40℃ |
| 12 | Specific gravity g/cm3 | 1.43±0.03 |
| 13 | Cure condition: 151℃×60 min, or 163℃×20 min | |
