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| HDPE geomembrane technical index of ASTM test GM 13 standard | |||||||
| No. | Item | Test Value (mm) | |||||
| 0.5 | 0.75 | 1.0 | 1.25 | 1.5 | 2.0 | ||
| 1 | Minimum Density(g/cm3) | ≥0.94 | |||||
| 2 | Tensile Property | ||||||
| Strength at yield, N/mm | 7 | 11 | 15 | 18 | 22 | 29 | |
| Tensile Strength at break,N/mm | 14 | 20 | 27 | 33 | 40 | 53 | |
| Elongationat yield,% | 12 | ||||||
| Elongation at break,% | 700 | ||||||
| 3 | Tear Resistance N | 60 | 93 | 125 | 156 | 187 | 249 |
| 4 | Puncture Resistance N | 160 | 240 | 320 | 400 | 480 | 640 |
| 5 | Stress Crack Resistance, hrs | 300 500 | |||||
| 6 | Carbon Black Content,% | 2.0-3.0 | |||||
| Carbon Black Dispersion | 1or 2 | ||||||
| 7 | Standard OTI Min | 100 | |||||
| High Pressure OTI Min | 400 | ||||||
| 8 | Impact Cold Crack at-70ºC | Pass | |||||
| 9 | Water vapor permeability (g.cm/c2.s. Pa) | ≤1.0x10-13 | |||||
| 10 | Dimensional Stability (%) | ±2 | |||||




