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Item | High Strength Polythylene geomembrane | ||||||
Thickness mm | 0.75 | 1.0 | 1.5 | 2.0 | |||
Densityg/㎡ | ≥0.94 | ||||||
Yield strenrth(stress),N/mm | 12 | 15 | 23 | 30 | |||
Breaking strength(stress),N/mm | 22 | 28 | 43 | 57 | |||
Elongation at yield,% | 13 | ||||||
Elongation at break,% | 700 | ||||||
Right angle tear strength,N | 95 | 125 | 187 | 249 | |||
Puncture strength,N | 270 | 350 | 530 | 700 | |||
Resistance to environmental stress cracking,h | 400 | ||||||
Carbon black | |||||||
Carbon black content(range),% | 2.0-3.0 | ||||||
Carbon black dispersion | Nine out of the 10 observation areas should belong to Level 1 or 2, Level 3 should not be more than once | ||||||
Oxidation induction time(OIT) | |||||||
Standard OIT,min | 100 | ||||||
High pressure OIT,min | 400 | ||||||
Standard OIT retention after 91 days of baking,% | 55 | ||||||
Retention of high pressure OIT afrer 91 days of baking | 80 | ||||||
After 1600h of ultraviolet radiation,the retention of standard OIT,% | 50 | ||||||
After 1600h of ultraviolet radiation,the retention of high-pressure OIT,% | 50 | ||||||
-70℃ low temperature impact embrittlement performance | pass | ||||||
Dimensional stability,% | ±2 |
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