High Density Polyethylene Geomembrane
1.Excellent anti-seepage performance：The material is dense and can effectively block liquid infiltration, suitable for projects that require strict anti-seepage such as water conservancy and environmental protection, reducing the risk of leakage.
2.Strong durability：It is anti-aging, acid and alkali resistant, and wear-resistant. It can be used stably for a long time in various harsh environments, and its service life can reach decades.
3.Convenient construction：Lightweight texture, can be cut and spliced, high laying efficiency, can adapt to complex terrain, and reduce construction difficulty.
4.Cost economy：The material price is moderate, with low installation and maintenance costs, making it more cost-effective compared to traditional anti-seepage materials.
5.Wide applicability：Widely used in landfill sites, reservoirs, artificial lakes, tunnels and other scenarios to meet the anti-seepage needs of different projects.
Product Introduction
Basic Definition
High Density Polyethylene Geomembrane is a flexible waterproof and barrier material made from high molecular weight polymers such as polyethylene and polyvinyl chloride through processes such as blow molding and rolling. Its molecular structure is dense and has excellent impermeability, which can effectively block the permeation paths of liquids and gases. It is the core material for achieving anti-seepage and isolation functions in various engineering projects, playing a key role in controlling water resource loss and preventing pollutant diffusion.
Core functions
The core function is efficient anti-seepage, which can tightly block the infiltration of liquids such as water, sewage, and chemical solutions, while also preventing the diffusion of gases such as methane and avoiding environmental pollution; In addition, it can also separate materials such as soil and sand with different particle sizes to prevent mixing and failure of structural layering, ensuring the stability of engineering structures and improving overall engineering quality.
Construction method
Flexible cutting can be made according to the actual size of the project, and hot melt welding or adhesive bonding are mainly used for splicing. Hot melt welding uses specialized equipment to heat the edges of the film to a molten state and then press it together, with a joint strength of over 80% of the base material; Adhesive is suitable for small area repairs or special material splicing, with strong bonding and good sealing performance. During the laying process, it is necessary to avoid piercing the membrane with sharp stones, steel bars, and other hard objects. If necessary, a cushion layer should be laid for protection to ensure the integrity of the membrane.
Product Parameters
Metric | ASTM | unit | Test value | Minimum test frequency | ||||||
test method | 0.75 mm | 1.00 mm | 1.25 mm | 1.50 mm | 2.00 mm | 2.50mm | 3.00 mm | |||
Minimum average thickness | D5199 | mm | 0.75 | 1 | 1.25 | 1.5 | 2 | 2.5 | 3 | Per volume |
Minimum value (any one of 10) | -10% | -10% | -10% | -10% | -10% | -10% | -10% | |||
minimum density | D 1505/D 792 | g/cm3 | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | 0.94 | 90,000 kg |
Minimum average tensile performance (1) | D638 Type IV | |||||||||
Breakage strength, | N/mm | 20 | 27 | 33 | 40 | 53 | 67 | 80 | 9,000 kg | |
yield strength | N/mm | 11 | 15 | 18 | 22 | 29 | 37 | 44 | ||
Strain extension, | % | 700 | 700 | 700 | 700 | 700 | 700 | 700 | ||
yield extension | % | 12 | 12 | 12 | 12 | 12 | 12 | 12 | ||
Minimum strength of right-angle tear | D 1004 | N | 93 | 125 | 156 | 187 | 249 | 311 | 374 | 20,000 kg |
Minimum puncture strength | D4833 | N | 240 | 320 | 400 | 480 | 640 | 800 | 960 | 20,000 kg |
Constant tensile load stress cracking (2) | D5397 | hour | 300 | 300 | 300 | 300 | 300 | 300 | 300 | Based on GRI GM-10 |
Carbon black content | D 1603(3) | % | 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 |
Carbon black dispersion | D5596 | Note (4) | Note (4) | Note (4) | Note (4) | Note (4) | Note (4) | Note (4) | 20,000 kg | |
Oxygen induction time (OIT) (5) | 90,000 kg | |||||||||
(a) Standard OIT | D3895 | minute | 100 | 100 | 100 | 100 | 100 | 100 | 100 | |
（b） high-handed OIT | D5885 | minute | 400 | 400 | 400 | 400 | 400 | 400 | 400 | |
85℃ Oven aging (minimum average) (5)(6) | Per formula | |||||||||
(A) Standard OIT is retained after 90 days | D 5721 | % | 55 | 55 | 55 | 55 | 55 | 55 | 55 | |
(B) High voltage OIT is retained for 90 days | D 3895 D5885 | % | 80 | 80 | 80 | 80 | 80 | 80 | 80 | |
Ultraviolet resistance (7) | Per formula | |||||||||
（a） standard OIT | D3895 | Note (8) 50 | ||||||||
(b) Retention of high pressure OIT after 1600 hours (9) | D5885 | % | ||||||||
Product Application
Environmental protection field
In landfill engineering, geomembrane is the "core barrier" of the anti-seepage system. It is laid at the bottom and surrounding areas of the landfill, which can tightly block the infiltration of garbage leachate into the soil and groundwater, prevent the spread of pollutants such as heavy metals and harmful organic matter, and reduce the risk of soil and water pollution; At the same time, its dense structure can effectively prevent the leakage of landfill gases such as methane, reducing greenhouse gas emissions and ensuring the production and living safety of surrounding residents.
Water conservancy engineering
In reservoir construction, geomembranes are laid on the upstream face and bottom of the dam body, which can significantly reduce the leakage of reservoir water through the dam body and foundation, and enhance the reservoir's water storage capacity; When used for irrigation channels, it can reduce the leakage loss rate of the channel, increase water resource utilization by more than 30%, especially in arid areas, significantly save valuable water resources, ensure agricultural irrigation and industrial water demand, and help water conservancy projects achieve long-term benefits.
Landscape and Municipal Affairs
In landscape projects such as artificial lakes and landscape water pools, geomembranes serve as waterproof layers to prevent water level drops caused by water infiltration, maintain stable water volume and aesthetic appearance of landscape water bodies, and reduce cost expenditures caused by frequent water replenishment; In the construction of tunnels and underground garages, the geomembrane laid on the outer layer of the structure can block the infiltration of groundwater, avoid problems such as leakage and moisture, ensure that the underground space is dry and clean, and improve the comfort of use and structural durability.
Industrial sector
Laying geomembranes in industrial wastewater treatment tanks can tightly block sewage leakage containing acid, alkali, heavy metals, and other components, prevent pollution of the factory area and surrounding soil and groundwater, and meet environmental discharge standards; In scenarios such as chemical waste liquid pools and waste disposal yards, its chemical corrosion resistance can resist the erosion of various corrosive media, ensure the safe disposal of industrial waste, and reduce the probability of environmental pollution incidents.
Geomembranes play a crucial role in various fields such as environmental protection, water conservancy, landscape and municipal engineering, as well as industry, due to their excellent anti-seepage and isolation properties. It can not only effectively prevent the spread of pollutants, save water resources, and ensure the stability of engineering structures, but also reduce environmental pollution risks, providing important guarantees for the safe and efficient operation of various projects, and is an indispensable material in modern engineering construction.
