Physical properties of the resistance to the tropical covering | |||||
Projects | Type | ||||
T1 | T2 | T3 | T4 | ||
Allowable variation range | |||||
Hardness | Difference between after aging and before aging(IRHD) | +20 | +20 | ±20 | ±20 |
Maximum value after aging(IRHD) | 85 | 85 | 85 | 85 | |
Tensile strength | Rate of performance change/% | -25 | -30 | -40 | -40 |
Minimum value after aging/Mpa | 12 | 10 | 5 | 5 | |
Elongation at break | Rate of change after aging/% | -50 | -50 | -55 | -55 |
Minimum value after aging/% | 200 | 200 | 180 | 180 | |
Note: T1--the testing temperature<100°C
T2--the testing temperature<125°C T3--the testing temperature<150°C T4--the testing temperature<175°C |
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