ASTM Waterproof Impermeable HDPE Geomembrane Sheet Anti UV Liners For Sea Slope

HDPE geomembrane (high-density polyethylene geomembrane) is an environmentally friendly anti-seepage material with high-density polyethylene resin as the main raw material. It is widely used in engineering anti-seepage, pollution isolation and structural reinforcement..

Basic characteristics

Composition and structure

· The main components are 97.5% high-density polyethylene, 2.5% carbon black and trace antioxidants, without chemical additives.

· Density greater than 0.94g/cm³, milky white appearance, thin cross-section is translucent.

Physical properties

· High tensile strength: tensile strength can reach 28MPa, elongation at break 700%.

· Wide temperature range: applicable temperature -60°C to +60°C, service life of more than 50 years.

· Low permeability: permeability coefficient as low as K=1.0×10⁻¹³g·cm/(cm²·s·Pa), with significant anti-seepage effect.

Chemical properties

· Resistant to strong acid, strong alkali and more than 80 chemical media corrosion, and resistant to plant root puncture.

· Anti-ultraviolet and anti-aging, strong stability in open air environment.

Main Feature

⚫ High anti-seepage ratio
⚫ Chemical Stability
⚫ Anti plant root system
⚫ Aging resistance
⚫ High Mechanic strength
⚫ Low cost
⚫ Environmental protection formulation
⚫ Rapid construction

Key application areas

1. Environmental protection projects

· Landfill: used for bottom anti-seepage layer and capping to prevent leachate from polluting groundwater.

· Sewage treatment plant: anti-seepage isolation of regulating tanks and hazardous waste treatment sites.

2. Water conservancy projects

· Anti-seepage reinforcement of reservoirs, dams, and channels to reduce water resource loss.

· Waterproof padding of artificial lakes and reservoirs.

3. Agriculture and breeding

· Lining of fish ponds and shrimp ponds to prevent leakage and resist microbial erosion.

· Anti-seepage treatment of irrigation systems and biogas tanks.

4. Municipal and mining

· Waterproofing of subway tunnels and basements, anti-seepage isolation of tailings ponds.

· Anti-corrosion lining of chemical oil storage tanks and reaction pools.

Construction Technical Requirements

1. Base surface treatment

· It should be flat and free of sharp objects, with a compaction degree of ≥95% and a smooth transition of slope.

2. Welding process

· The joints should be clean and dry, avoiding moisture and dust; the welder should be preheated when the temperature is below 5°C.

· It is recommended to use hot melt welding, and the weld strength should reach more than 90% of the parent material.

3. Laying specifications

· Extend from low to high, leaving 1.5% expansion margin to accommodate settlement.

· Adjacent longitudinal joints should be staggered by more than 1m to avoid corner areas.