No | Test item | I | II | |||
1 | Tensile strength Mpa ≥ | 1.0 | 1.8 | |||
2 | Elongation at break % ≥ | 360 | ||||
3 | Low temperature flexibility (round 10mm pole bend 180 degrees) | -10degrees no crack | -20degrees no crack | |||
4 | Imperviousness(0.3Mpa,30min) | impermeable | ||||
5 | Solid content% ≥ | 72 | ||||
6 | Dry time h | Face dry ≤ | 4 | |||
Real dry ≤ | 8 | |||||
7 | Tensile strength retention after treatment% | Heat treatment ≥ | 80 | |||
Alkali treatment ≥ | 60 | |||||
Acid treatment ≥ | 40 | |||||
Artificial weathering treatment ≥ | 80-150 | |||||
8 | Elongation at break after treatment% | Heat treatment ≥ | 200 | |||
Alkali treatment≥ | ||||||
Acid treatment≥ | ||||||
Artificial weathering treatment≥ | 200 | |||||
9 | Heating rate % | elongation ≤ | 1.0 | |||
Shorten ≤ | 1.0 |