NO. | Test Items | Values | |
|---|---|---|---|
1 | Before ageing test | 1.1 Tensile strength(MPa) | ≥5.0 |
1.2 Elongation at break(%) | ≥200 | ||
2 | Air oven ageing test | 2.1 Test condition | 135±2℃/168h |
2.2 Tensile strength(MPa) | ≥5.0 | ||
2.3 Tensile strength rate(%) | ±30 | ||
2.4 Elongation at break rate (%) | ±40 | ||
3 | Air bomb ageing test | 3.1 Test condition | 127±2℃/40h |
3.2 Tensile strength rate(%) | ±30 | ||
3.3 Elongation at break rate (%) | ±30 | ||
4 | Heat extension test | 4.1 Test condition | 250±3℃/15min, stress20N/cm |
4.2 Loading elongation rate(%) | < 100 | ||
4.3 Un-loading elongation rate(%) | < 25 | ||
5 | Ozone ageing test | 5.1 Test condition | 25±2℃/24h, concentration 2.5-3% |
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℃ | |
Polymer: EPDM
Standard No.：EN 50363-1:2005
