Waterproof Board
EVA Waterproof Board—Flexible EVA Impermeable Sheet
To guarantee a 100% product acceptance rate, the company's quality control department conducts both continuous production line inspections and random checks on finished goods, ensuring doubly secure quality for the "Zhonglong" brand.
Technical Parameter
| No. | Item | Condition | Unit | Index |
| 1 | Tensile Strength | 23°C | MPa | ≧16 |
| 60°C | ≧6 | |||
| 2 | Ultimate Elongation | 23°C | % | ≧550 |
| -20°C | ≧350 | |||
| 3 | Tear Strength | kN/m | ≧60 | |
| 4 | Impermeability | 0.3MPa; 30 min | No leakage | |
| 5 | Low-Temperature Flexibility | -35°C | No crack | |
| 6 | Thermal Dimensional Change | Extension | mm | ≤2 |
| Contraction | ≤6 | |||
| 7 | Heat Aging | 80°C×168h | % | ≥80 (Tensile strength retention) |
| ≥70 (Elongation retention) | ||||
| 8 | Alkali Resistance | [Sat. Ca(OH)₂(aq), 23°C×168h] | % | ≥80 (Tensile strength retention) |
| ≥90 (Elongation retention) |
