Table 2(a) – High Density Polyethylene (HDPE) Geomembrane - Textured
Feb 03, 2023
Table - High Density Polyethylene(HDPE)Geomembrane-Textured
| Properties | Test Method |
Test Value | Testing Frequency (minimum) |
|||||||
| 0.5mm | 0.75mm | 1.0mm | 1.25mm | 1.5mm | 2.0mm | 2.5mm | 3.0mm | |||
| Thickness - (min.ave.) - mm ● lowest individual of 5 values ± % |
D 5199 | nom. ±5 |
nom. ±5 |
nom. ±5 |
nom. ±5 |
nom. ±5 |
nom. ±5 |
nom. ±5 |
nom. ±5 |
per roll |
| Formulated Density (min.ave.) - g/cc | D 1505 | 0.940 | 0.940 | 0.940 | 0.940 | 0.940 | 0.940 | 0.940 | 0.940 | 90,000kg |
| AsperityHeight (One side ave.) - mm | D 7466 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | every 2nd roll |
| Tensile Properties (min.ave.) ● yield strength - kN/m ● break strength - kN/m ● yield elongation - % ● break elongation - % |
D 6693 Type IV |
9 17 12 700 |
11 20 12 700 |
15 27 12 700 |
18 33 12 700 |
22 40 12 700 |
29 53 12 700 |
37 67 12 700 |
44 80 12 700 |
9,000kg |
| Tear Resistance (min.ave.) - N | D 1004 | 80 | 93 | 125 | 156 | 187 | 249 | 311 | 374 | 20,000kg |
| Puncture Resistance (min.ave.) - N | D 4833 | 200 | 240 | 320 | 400 | 480 | 640 | 800 | 960 | 20,000kg |
| Stress Crack Resistance - hr. | D 5397 App. |
500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | per GRI GM-10 |
| Carbon Black Content(range) - % | D4218 | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 | 9,000 kg |
| Oxidative Induction Time(OIT)（min.ave.) (a) Standard OIT - min. — or — (b) High Pressure OIT - min. |
D 8117 D5885 |
100 400 |
100 400 |
100 400 |
100 400 |
100 400 |
100 400 |
100 400 |
100 400 |
90,000kg |
| Oven Aging at 85℃ (a) Standard OIT (min.ave.) - % retained after 90 days — or — (b)High Pressure OIT (min.ave.) - % retained after 90days |
D 5721 D8117 D5885 |
55 80 |
55 80 |
55 80 |
55 80 |
55 80 |
55 80 |
55 80 |
55 80 |
per each formulation |
| UV resistance (a) Standard OIT (min.ave.) — or — (b)High Pressure OIT （min.ave.) - % retained after 1600 hrs |
D 7238 D8117 D5885 |
N.R.(8) 50 |
N.R.(8) 50 |
N.R.(8) 50 |
N.R.(8) 50 |
N.R.(8) 50 |
N.R.(8) 50 |
N.R.(8) 50 |
N.R.(8) 50 |
per each formulation |
| Melt Index,condition 190℃ c/2.16kg | D 1238 | 0.20g/10min | ||||||||
| Roll Width | 1-12m | |||||||||
| Roll Length | 50m or 100m | |||||||||
| Color | Black,Green,Blue,White | |||||||||
| Material: | HDPE, LDPE and LLDPE can be customized, | |||||||||
(1) Alternate the measurement side for double sided textured sheet
(2) Machine direction (MD) and cross machine direction (XMD) average values should be on the basis of 5 test specimens each direction.
Yield elongation is calculated using a gage length of 1.3 inches
Break elongation is calculated using a gage length of 2.0 inches
(3) P-NCTL test is not appropriate for testing geomembranes with textured or irregular rough surfaces. Test should be conducted on smooth edges of textured rolls or on smooth sheets made from the same formulation as
being used for the textured sheet materials.
The yield stress used to calculate the applied load for the SP-NCTL test should be the manufacturer’s mean value via MQC testing.
(4) Other methods such as D 1603 (tube furnace) or D 6370 (TGA) are acceptable if an appropriate correlation to D 4218 (muffle furnace) can be established.
(5) Carbon black dispersion (only near spherical agglomerates) for 10 different views:
9 in Categories 1 or 2 and 1 in Category 3
(6) The manufacturer has the option to select either one of the OIT methods listed to evaluate the antioxidant content in the geomembrane.
(7) It is also recommended to evaluate samples at 30 and 60 days to compare with the 90 day response.
(8) The condition of the test should be 20 hr. UV cycle at 75C followed by 4 hr. condensation at 60C.
(9) Not recommended since the high temperature of the Std-OIT test produces an unrealistic result for some of the antioxidants in the UV exposed samples.
(10) UV resistance is based on percent retained value regardless of the original HP-OIT value.
