30 Mils Geomembrane HDPE Liner

I. Product Overview & Core Positioning

30 Mils HDPE geomembrane (equivalent to 0.762mm thickness) is a high-performance anti-seepage material fabricated from virgin high-density polyethylene resin. Designed for medium and light-duty engineering scenarios, it integrates reliable seepage control, easy installation, and cost-effectiveness, which makes it a preferred solution in water conservancy, environmental protection, landscaping, and transportation projects worldwide.

II. Manufacturing Process & Quality Control

The product adopts a one-step extrusion-calendering integrated process without any recycled materials. Virgin HDPE resin is melted at 180-220℃, extruded through precision dies, then calendered at constant temperature and cooled to shape. On-line thickness monitoring and defect detection systems are equipped throughout the production process to ensure uniform thickness (tolerance ≤±5%) and avoid pinholes or material shortages, guaranteeing consistent product quality.

III. Technical Specifications (Physical & Chemical Properties)

IV. Core Performance Advantages

This product boasts four core advantages: 

First, excellent seepage control with a permeability coefficient ≤1×10⁻¹⁶ cm/s, effectively preventing water and pollutant leakage. 

Second, wide adaptability, maintaining flexibility without embrittlement at low temperatures and stability at high temperatures, suitable for laying on complex terrains. 

Third, efficient installation, weighing only 0.72kg per square meter, with thermal welding strength reaching over 90% of the base material. Fourth, long durability, resistant to aging and corrosion, with a service life exceeding 30 years under normal working conditions.

V. Typical Engineering Applications

It is widely applied in four key fields: 

1.Agricultural water conservancy, used for seepage control of water storage tanks and irrigation channels to reduce water waste. 2.Environmental protection, suitable for capping small landfills and seepage control of sewage treatment pools to protect the ecological environment. 

3.Landscaping projects, applied in artificial lakes and landscape pools to maintain water storage. 

4.Transportation engineering, used for subgrade seepage control to prevent groundwater erosion and enhance project stability.

VI. Key Construction Considerations

Construction should follow four key steps: 

First, the base surface must be leveled and compacted, with sharp debris removed and slope controlled within 1:2.5.

Second, lay the membrane with appropriate slack to avoid stretching, keeping the overlap width at 10-15cm. 

Third, use hot air welding guns (200-230℃) for continuous welding without missing joints. 

Fourth, conduct air pressure testing after construction (pressure 0.15-0.2MPa, holding for 5 minutes without pressure drop) to ensure qualified seepage control.

VII. Post-Construction Maintenance Norms

Post-maintenance focuses on "damage prevention and regular inspection": Prohibit rolling or puncturing the membrane with sharp objects and stacking heavy loads nearby. Conduct regular inspections at least twice a year, focusing on welds and edges, and repair damages with special patches promptly. For outdoor scenarios, cover with geotextile to avoid accelerated aging from direct sunlight. Keep away from strong oxidants and concentrated acids to extend service life.

VIII. Selection & Adaptation Suggestions

Selection should be based on working conditions: Prioritize this product for medium and light-duty seepage control projects for optimal cost-effectiveness.

For highly corrosive scenarios, use it with anti-corrosion coatings. It is directly applicable to low-temperature and high-altitude areas. Always verify engineering design indicators to ensure product parameters meet seepage control standards and avoid blind selection.