Ordinary HDPE Geomembrane: GB/T 17643-2011 | ||||||||||||
No. | Item | Index | ||||||||||
Thickness,mm | 0.30 | 0.50 | 0.75 | 1.00 | 1.25 | 1.50 | 2.00 | 2.50 | 3.00 | |||
1 | Density,g/cm2 | >=0.940 | ||||||||||
2 | Tensile yield strength (longitudinal and transverse),N/mm | >=4 | >=7 | >=10 | >=13 | >=16 | >=20 | >=26 | >=33 | >=40 | ||
3 | Tensile breaking strength (longitudinal and transverse),N/mm | >=6 | >=10 | >=15 | >=20 | >=25 | >=30 | >=40 | >=50 | >=60 | ||
4 | Elongation at yield (longitudinal and transverse),% | - | - | - | >=11 | |||||||
5 | Elongation at break (longitudinal and transverse),% | >=600 | ||||||||||
6 | Right angle tear load (longitudinal and transverse),N | >=34 | >=56 | >=84 | >=115 | >=140 | >=170 | >=225 | >=280 | >=340 | ||
7 | Puncture resistance,N | >=72 | >=120 | >=180 | >=240 | >=300 | >=360 | >=480 | >=600 | >=720 | ||
8 | Carbon black content,% | 2.0~3.0 | ||||||||||
9 | Carbon black dispersibility | No more than 1 level 3 of 10 data, and levels 4 and 5 are not allowed. | ||||||||||
10 | Atmospheric pressure oxidation induction time(OIT),min | >=60 | ||||||||||
11 | Low temperature impact embrittlement performance | Pass | ||||||||||
12 | Water vapor permeability coefficient,g·cm/(cm2·s·Pa) | <=1.0×10-13 | ||||||||||
13 | Dimensional stability,% | ±2.0 | ||||||||||
Note: Technical performance indicators not listed in the table for thickness specifications are required to be implemented using the interpolation method. |
Waterproof geomembrane: TB/T3360.1-2014 | |||||||
No. | Item | Index | |||||
EVA | ECB | PE | |||||
1 | Tensile property | Tensile strength at break(MPa) | >=18 | >=17 | >=18 | ||
Elongation at break(%) | >=650 | >=600 | >=600 | ||||
2 | Tear strength( KN/m) | >=100 | >=95 | >=95 | |||
3 | Impermeability(0.3MPa/24h) | No-leakage | No-leakage | No-leakage | |||
4 | Low temperature bending(-35ºC) | No cracks | No cracks | No cracks | |||
5 | Heating expansion amount | Extend(mm) | <=2 | <=2 | <=2 | ||
Shrink(mm) | <=6 | <=6 | <=6 | ||||
6 | Hot air aging(80ºC×168h) | Tensile strength at break(MPa) | >=16 | >=14 | >=15 | ||
Elongation at break(%) | >=600 | >=550 | >=550 | ||||
7 | Alkali resistance (saturated Ca(OH)2 solution×168h) | Tensile strength at break(MPa) | >=17 | >=16 | >=16 | ||
Elongation at break(%) | >=600 | >=600 | >=550 | ||||
8 | Artificial aging | Breaking tensile strength retention rate(MPa) | >=80 | >=80 | >=80 | ||
Retention rate of elongation at break(%) | >=70 | >=70 | >=70 | ||||
9 | Puncture strength | Thickness1.5mm(N) | >=300 | >=300 | >=300 | ||
Thickness2.0mm(N) | >=400 | >=400 | >=400 | ||||
Thickness2.5mm(N) | >=500 | >=500 | >=500 | ||||
Thickness3.0mm(N) | >=600 | >=600 | >=600 |
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