Geo Membranes HDPE Liner

Product Definition of Geo Membranes HDPE Liner

Geo Membranes HDPE Liner is a high-density polyethylene geomembrane engineered as an impermeable barrier for environmental, civil, and industrial containment projects. It is designed to prevent liquid and gas migration, ensuring long-term sealing performance under mechanical, chemical, and environmental stress.

Technical Parameters and Specifications

Geo Membranes HDPE Liner is manufactured according to internationally recognized geosynthetic standards, suitable for landfill, mining, water conservancy, and industrial containment systems.

• Material: High-Density Polyethylene (HDPE)

• Density: ≥ 0.94 g/cm³

• Thickness Range: 0.5 mm – 3.0 mm

• Standard Width: 5 m – 8 m

• Standard Length: 50 m – 200 m

• Tensile Strength at Yield: ≥ 15 MPa

• Elongation at Break: ≥ 700%

• Carbon Black Content: 2.0% – 3.0%

• Hydrostatic Pressure Resistance: ≥ 0.3 MPa

• Service Temperature Range: -40°C to +60°C

• Design Service Life: ≥ 30 years (buried condition)

Structure and Material Composition

Geo Membranes HDPE Liner adopts a homogeneous polymer structure with optimized additives to enhance durability and environmental resistance.

• Primary Resin Layer: Virgin HDPE resin providing impermeability and mechanical strength

• Carbon Black Dispersion: UV resistance and aging protection

• Antioxidant System: Thermal and oxidative stability during long-term exposure

• Optional Surface Texture: Single or double textured finish to improve interface friction

Manufacturing Process

The production of Geo Membranes HDPE Liner follows a controlled extrusion and quality assurance process.

1. Raw material batching and resin drying

2. Flat die or blown film extrusion using high-output extruders

3. Precision thickness calibration and cooling

4. Surface texturing (if required) via embossing rollers

5. Inline quality monitoring (thickness, density, dispersion)

6. Rolling, cutting, and labeling

7. Final inspection and laboratory testing

Key equipment includes twin-screw extruders, automatic thickness gauges, and carbon black dispersion analyzers.

Industry Comparison with Alternative Materials

Application Scenarios

Geo Membranes HDPE Liner is widely adopted across infrastructure and environmental engineering sectors.

• Municipal solid waste landfills

• Hazardous waste containment facilities

• Mining heap leach pads and tailings dams

• Industrial wastewater ponds

• Agricultural irrigation reservoirs

• Canals, tunnels, and water storage projects

Core Engineering Pain Points and Solutions

• Leakage Risk: Continuous extrusion sheets and welded seams ensure low permeability

• Chemical Degradation: HDPE polymer resists acids, alkalis, and hydrocarbons

• UV Aging: Carbon black stabilization extends outdoor exposure performance

• Subgrade Settlement: High elongation accommodates differential settlement

Risk Warnings and Mitigation Recommendations

Improper design or installation can compromise liner performance.

• Avoid installation on sharp or poorly compacted subgrade

• Ensure certified welding technicians perform seam welding

• Conduct nondestructive seam testing

• Prevent prolonged exposure before backfilling

Procurement and Selection Guide

1. Define project application and containment requirements

2. Select appropriate thickness based on load and chemical exposure

3. Determine surface texture requirements

4. Verify compliance with ASTM or ISO standards

5. Review manufacturer quality control documentation

6. Assess logistics, roll size, and installation support

7. Request material samples for verification

Engineering Case Application

In a municipal landfill expansion project, a 2.0 mm Geo Membranes HDPE Liner system was installed across a 120,000 m² base and slope area. Double-textured liners improved slope stability, while dual-track hot wedge welding achieved over 98% seam integrity compliance during field testing.

Frequently Asked Questions (FAQ)

• What thickness is typical for landfill liners? – Commonly 1.5 mm to 2.0 mm

• Can HDPE liners withstand chemical waste? – Yes, with verified compatibility

• Is textured liner mandatory for slopes? – Recommended for slopes above 1:3

• How are seams tested? – Air pressure and vacuum box testing

• What is the expected lifespan? – Over 30 years under buried conditions

• Can liners be repaired onsite? – Yes, using extrusion welding

• Are custom sizes available? – Width and length can be customized

• Does HDPE liner resist UV? – Yes, with carbon black stabilization

• What standards apply? – ASTM D5885, ASTM D6693, ISO 9001

• Is third-party inspection recommended? – Strongly recommended for EPC projects

CTA – Request Commercial and Technical Support

For pricing inquiries, detailed technical datasheets, or project-specific engineering samples of Geo Membranes HDPE Liner, procurement and engineering teams are encouraged to submit formal requests for evaluation.

E-E-A-T Author Credentials

This article is prepared by geosynthetics engineering specialists with over 15 years of experience in landfill, mining, and water containment projects. The content reflects industry standards, verified engineering practices, and real-world EPC implementation knowledge.