NO. | Items | Value |
1 | Tensile force | Tensile strength /(N/50mm) ≥ | 212 |
Elongation at maximum tensile force/% ≥ | 320 |
Elongation at bitumen break ≥ | 350 |
Test phenomena | No bitumen layer sep- arated from film before the break of film |
2 | Tear Strength by nail shank/N ≥ | 100 |
3 | Heat Resistance | 70°C, 2h , no displacement |
4 | Low temperature flexibility/ºC | -20 |
No crack |
5 | Water Impermeability | 0.2MPa,120min,No Water Leakage |
6 | Peel strength/ (N/mm) N ≥ | Sheet with sheet | 1.2 |
Sheet with aluminium plate | 1.3 |
7 | Bonding retention /min ≥ | 50 |
8 | Watertightness by nail shank | Pass |
9 | Oil penetration test,sheets ≤ | 2 |
10 | Heat Aging (70°C/168h) | Tensile retention /% N ≥ | 90 |
Elongation at maximum tensile force/% ≥ | 380 |
Low temperature flexibility /°C | -18 |
No crack |
11 | Heat stability | Appearance | No blister,fold, displacement or flow |
Dimensional variation/% W ≤ | 2.0 |