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project name | index | ||
Tensile strength/MPa | ordinary temperature(23℃)≥ | 7.5 | |
ordinary temperature(60℃)≥ | 2.3 | ||
Elongation at break/% | ordinary temperature(23℃)≥ | 450 | |
low temperature(-20℃)≥ | 200 | ||
Tear strength/(kN/m) ≥ | 25 | ||
Impermeability (30 minutes) | 0.3Mpa without leakage | ||
Low temperature bending | -40 ℃ without cracks | ||
Heating expansion amount/mm | Extend ≤ | 2 | |
Shrinkage ≤ | 4 | ||
Hot air aging (80℃×168h) | Tensile strength retention rate,%≥ | 80 | |
Retention rate of elongation at break,%≥ | 70 | ||
Alkali resistance [saturated Ca (OH) 2 solution 23 ℃ × 168h] | Tensile strength retention rate,%≥ | 80 | |
Retention rate of elongation at break,%≥ | 80 | ||
Ozone aging (40 ℃ × 168h) | elongation40%,500×10-8 | without cracks | |
Artificial climate aging | Tensile strength retention rate,%≥ | 80 | |
Retention rate of elongation at break,%≥ | 70 | ||
Bond peel strength (Sheet and Sheet) | Standard test conditions (N/mm) ≥ | 1.5 | |
Soaking retention rate (23 ℃ × 168h)% ≥ | 70 |