HDPE is known for its high strength-to-density ratio.The density of HDPE can range from 930 to 970 kg/m3.Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength than LDPE. The difference in strength exceeds the difference in density, giving HDPE a higher specific strength.It is also harder and more opaque and can withstand somewhat higher temperatures (120 °C/248 °F for short periods). High-density polyethylene, unlike polypropylene, cannot withstand normally required autoclaving conditions. The lack of branching is ensured by an appropriate choice of catalyst (e.g., Ziegler–Natta catalysts) and reaction conditions.
| TESTED PROPERTY | TEST METHOD | FREQUENCY | UNIT ENGLISH METRIC |
VALUE ENGLISH(METRIC |
| Thickness Lowest individual reading |
ADTM D 5199 | eery roll | mil(mm) | 40(1.00 36(0.90) |
| Density | ASTM D1503 | 200,000lbs(90,000kg) | g/m³（mil) | 0.94 |
| Tensile properties (each direction Strength at break Strength at yield Elongation at break Elongation at yeild |
ASTM D 6692 ,Type IV Dumbbell,2 ipm (50mm/min) G.L 2.0min(50mm) G.L.1.3min(33mm) |
200,000ibs(90,000kg) | lb/in-width(N/mm) lb/in-width(N/mm) % % |
152(27) 84(15) 700 12 |
| Tear Resistance | ASTM D 1004 | 45,000ibs(20,000kg) | Ib(N) | 28(125) |
| Puncture Resistance | ASTM D 4833 | 45,000ibs(20,000kg) | Ib(N) | 72(320) |
| Carbon Black Content | ASTM D 1063*/4218 | 20,000ibs(9,000kg) | %(range) | 2.0-3.0 |
| Caron Black Dispersion | ASTM D 5596 | 45,000ibs(20,000kg) | Note | |
| Notch Constant Tensile Load | ASTM D 5397 Appdenix |
20,000ibs(9,000kg) | hr | 300 |
| Oxidative Induction Time | ASTM D 3895 ,200℃ O2 ， atm |
20,000ibs(9,000kg) | min | > 100 |
| TYPICAL ROLL DIMESIONS | ||||
| Roll Length | ft(m) | 164.04（50） | ||
| Roll Width | ft(m) | 19.68（6） | ||
| Roll Area | ft²（m²） | 3229.17（300） | ||
| Notes | ||||
| ** Roll lengthe and width have a torance of ±1% | ||||
| ** All geomembranes have dimesional stability of ±2% when tested according to ASTM 1204 and 1204 and LTB of < -77°C when tested according to ASTM D746 | ||||
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