NO. | Test Items | Values | |
|---|---|---|---|
| Before ageing test | |||
| 1.2 Elongation at break(%) | |||
| 1.3 Mooney Viscosity(ML100℃1+4) | |||
| 2 | 2.1 Test condition | 120±2℃/72h | |
| ≥7.0 | |||
| 2.3 Elongation at break(%) | ≥200 | ||
| 3 | Air oven ageing test | 3.1 Test condition | 120±2℃/240h |
| 3.2 Tensile strength rate(%) | ±20 | ||
| 3.3 Elongation at break rate(%) | ±30 | ||
| 4 | 4.1 Test condition | ||
| 4.2 Loading elongation rate(%) | < 100 | ||
| 4.3 Un-loading elongation rate(%) | < 25 | ||
| 5 | Ozone ageing test | 5.1 Test condition | |
| 5.2 Test result | No cracks | ||
| 5.3 Test condition | 40±2℃/72h, concentration 200±50ppm | ||
| 5.4 Test result | No cracks | ||
| 6 | Low-temperature bend test | 6.1 Test condition | -50±3℃ |
| 6.2 Low-temperature elongation at unbreak(%) | > 30 | ||
| 6.3 Wire surface after low-temperature bend | No cracks | ||
| 7 | Maximum material operating temperature | 90℃ | |
| 8 | Carbon black content | ≥2% | |
