Item | Performance Index | |
Hardness (Shore A) | 60~70 | |
Tensile Strength (Mpa) | ≥8 | |
Elongation at breakage (%) | 300 | |
Hot air aging (70±2)°C/70h | Hardness changes, Shore A | 0~+5 |
Tensile strength changes,% | -15~+15 | |
Break elongation changes,% | -25~0 | |
Water proof (80±2)°C/120h | Hardness changes,Shore A | 0~+5 |
Tensile strength changes,% | -15~+15 | |
Break elongation changes,% | -25~0 | |
Compression set | (23±2)°C/72h | ≤35 |
(70±2)°C/24h | ≤50 | |
Brittleness temperature °C | No more than | -40 |
Ozone resistance | Stretch 20%,(40±2) °C/72h Ozone concentration (2±0.2)*10^-6 | No Crack |
Polluting | Light pollution | |
Causticity (100±2) °C/24h | Not turn to black |