1. Introduction:
High(middle) density polyethylene geomembrane is made from HDPE resin and additives such as antioxidant ,light-stabilize and carbon black, etc. It is extensively used for landfills, sewages, mining, environmental protections and irrigation projects.
£²£® Specification £º thickness £º 0.3mm -3.0mm width £º 4 -10m
£³£® Characteristic £º
- There are two types of the geomembrane ' s surface: smooth and textured. The textured surface has higher friction coefficient which can be used to avoid slide between the two covering layers .
- It has excellent erosion resistance, pitch ,oil and tar resistance, bacteria resistance and no poison
- The product has high UV resistance ,oven aging resistance and oxidant resistance, it can endure the direct sunlight lasting for decades.
- It has high tensile strength and tear resistance with excellent puncture resistance on the surface of rough and coarse basic ground .The puncture resistance by plant root accord with DIN4062.
- It can be easily welded by hot wedge and hot wind and is convenient for construction.
4. Major technical parameter £º
Minimum Values for Smooth Black-Surfaced HDPE Geomembranes ASTM GM13
Property |
Test Method (1) |
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|
|
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Thickness, mil (mm) |
ASTM D 5199 |
|
|
|
|
|
|
Minimum Average |
|
30 (0.75) |
36 (0.91) |
60 (1.5) |
80 (2.0) |
100 (2.5) |
120 (3.0) |
Lowest Individual Reading |
|
27 (0.69) |
40 (1.0) |
54 (1.4) |
72 (1.8) |
90 (2.3) |
108 (2.7) |
Density, g/cm 3 |
ASTM D 1505 |
0.94 |
0.94 |
0.94 |
0.94 |
0.94 |
0.94 |
Carbon Black Content, % |
ASTM D 1603, mod. |
2.0 |
2.0 |
2.0 |
2.0 |
2.0 |
2.0 |
Carbon Black Dispersion |
ASTM D 5596 |
Note 2 |
Note 2 |
Note 2 |
Note 2 |
Note 2 |
Note 2 |
Tensile Properties: |
ASTM D 6693 |
|
|
|
|
|
|
(each direction) |
|
|
|
|
|
|
|
Strength at Yield, lb/in (kN/m) |
|
63 (11) |
84 (15) |
130 (23) |
173 (30) |
216 (38) |
259 (45) |
Strength at Break, lb/in (kN/m) |
|
122 (21) |
162 (28) |
243 (43) |
324 (57) |
405 (71) |
486 (85) |
Elongation at Yield, % |
( 1.3¡± gauge length) |
13 |
13 |
13 |
13 |
13 |
13 |
Elongation at Break, % |
( 2.0¡± gauge length) |
700 |
700 |
700 |
700 |
700 |
700 |
Tear Resistance, lb (N) |
ASTM D 1004 |
21 (93) |
28 (124) |
42 (187) |
56 (249) |
70 (311) |
84 (373) |
Puncture Resistance, lb (N) |
ASTM D 4833 |
59 (263) |
79 (352) |
119 (530) |
158 (703) |
180 (800) |
216 (960) |
Notched Constant Tensile Load, hours |
ASTM D 5397, app. |
400 |
400 |
400 |
400 |
400 |
400 |
Oxidative Induction Time, min. |
ASTM D 3895 |
100 |
100 |
100 |
100 |
100 |
100 |
1 Some test procedures have been modified for application to geosynthetics. All procedures and values are subject to change without prior notification. |
2 Only near spherical agglomerates are considered. 9 of 10 views shall be Category 1 or 2. No more than one view Category 3. |
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