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LDPE geomembrane

LDPE geomembrane is based on plastic film. Compared with HDPE geomembrane, it has better tensile strength and flexibility. It is a new generation of geotechnical anti-seepage material.

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LDPE geomembrane is based on plastic film. Compared with HDPE geomembrane, it has better tensile strength and flexibility. It is a new generation of geotechnical anti-seepage material.

The geotechnical anti-seepage material made of LDPE geomembrane and geotextile bonded has the characteristics of corrosion resistance, low temperature resistance, light weight, strong tear resistance, etc. Its low cost, high quality and low price are the characteristics of other geotechnical anti-seepage materials of the same category. It is unmatched by permeable materials.

Construction technology

Geomembrane paving is completed, should minimize walking on the membrane surface, moving tools, etc., where the geomembrane can cause harm to the object, should not be placed on the membrane or carry walking on the membrane, so as not to cause accidental damage to the membrane. When laying geomembrane, we should strive to weld less, under the premise of ensuring the quality of welding, and try to save raw materials. The lap width of the joints between the membrane and the membrane is generally not less than 10cm, and the weld seams are usually arranged parallel to the larger slope, i.e. along the direction of the slope.

Technical indicators

Ordinary high-density polyethylene geomembrane (GB/T 17643 2011 GH-1 type technical indicators)

Item	Indicator
Thickness m m	0.30	0.50	0.75	1.00	1.25	1.50	2.00	2.50	3.00
densities g/cm³	≥0.940
Tensile yield strength (longitudinal and transverse) N/mm	≥4	≥7	≥10	≥13	≥16	≥20	≥26	≥33	≥40
Tensile breaking strength (longitudinal and transverse) N/mm	≥6	≥10	≥15	≥20	≥25	≥30	≥40	≥50	≥60
Yield elongation (longitudinal and transverse) %				≥11
Elongation at break (longitudinal and transverse) %	≥600
Right angle tearing load (longitudinal and transverse) N	≥34	≥56	≥84	≥115	≥140	≥170	≥225	≥280	≥340
Puncture strength N	≥72	≥120	≥180	≥240	≥300	≥360	≥480	≥600	≥720
Carbon black content %	2.0-3.0
Carbon Black Dispersibility	No more than 1 out of 10 data at level 3, not allowed at levels 4 and 5
Atmospheric pressure oxidation induction time (OIT)min	≥60
Low temperature impact embrittlement properties	pass
water vapor permeability coefficient g ·cm/(cm2 · s ·Pa)	≤1.0×10-13
Dimensional stability %	±2.0

Environmental protection high-density polyethylene geomembrane "GB/T 17643-2011 GH-2S type technical indexes

Item	Indicator
thicknesses mm	0.75	1.00	1.25	1.50	2.00	2.50	3.00
Densities g/cm³	≥0.940
Tensile yield strength (longitudinal and transverse) N/mm	≥11	≥15	≥18	≥22	≥29	≥37	≥44
Tensile breaking strength (longitudinal and transverse) N/mm	≥20	≥27	≥33	≥40	≥53	≥67	≥80
Yield elongation (longitudinal and transverse) %	≥12
Elongation at break (longitudinal and transverse) %	≥700
Right angle tearing load (longitudinal and transverse) N	≥93	≥125	≥160	≥190	≥250	≥315	≥375
puncture strength N	≥240	≥320	≥400	≥480	≥640	≥800	≥960
Stress cracking under tensile load		≥300
Carbon black content %	2.0~3.0
Carbon Black Dispersibility	No more than 1 out of 10 data at level 3, not allowed at levels 4 and 5
Atmospheric pressure oxidation induction time (OIT)min	Atmospheric pressure oxidation induction time ≥ 100
Atmospheric pressure oxidation induction time (OIT)min	High pressure oxidation induction time ≥ 400
85°C heat aging %	≥55
anti-ultraviolet	≥50