Nonwovens Composite Geomembrane

Product Definition

Nonwovens Composite Geomembrane is an engineered impermeable barrier formed by bonding one or two layers of nonwoven geotextile to a polymer geomembrane core. It integrates anti-seepage performance with filtration, protection, and stress distribution, widely applied in hydraulic, environmental, and civil engineering projects.

Technical Parameters and Specifications

The following parameters represent commonly adopted engineering ranges. Final selection should comply with project design codes and testing standards.

• Composite Structure: Nonwoven geotextile + geomembrane + nonwoven geotextile

• Geomembrane Material: HDPE / LDPE / LLDPE

• Geomembrane Thickness: 0.3 mm – 1.5 mm

• Nonwoven Geotextile Mass: 200 – 800 g/m²

• Tensile Strength: ≥ 8.0 kN/m

• Elongation at Break: ≥ 50%

• Peel Strength: ≥ 30 N/cm

• Hydrostatic Pressure Resistance: ≥ 0.6 MPa

• Permeability Coefficient: ≤ 1 × 10⁻¹³ cm/s

• Service Temperature: -40°C to +80°C

Structure and Material Composition

Nonwovens Composite Geomembrane adopts a layered structure to achieve both impermeability and mechanical protection.

• Upper nonwoven geotextile layer for cushioning and puncture resistance

• Central polymer geomembrane providing hydraulic impermeability

• Lower nonwoven geotextile layer for filtration and interface friction

• Thermal or adhesive bonding ensuring long-term interlayer stability

Manufacturing Process

The manufacturing process emphasizes bonding integrity and thickness uniformity.

1. Polymer geomembrane sheet extrusion or calendering

2. Nonwoven geotextile preparation and surface conditioning

3. Thermal lamination or hot-melt composite bonding

4. Online thickness and peel strength inspection

5. Cooling, trimming, and roll formation

6. Factory mechanical, hydraulic, and durability testing

Industry Comparison

Application Scenarios

Nonwovens Composite Geomembrane is widely adopted by EPC contractors, infrastructure developers, and distributors.

• Reservoirs and earth dams

• Irrigation and water conveyance canals

• Landfill bottom and cover liner systems

• Mining tailings ponds

• Artificial lakes and water landscape projects

Core Pain Points and Engineering Solutions

• Puncture risk from subgrade: Nonwoven layers provide cushioning protection

• Seepage control failure: Continuous geomembrane core ensures impermeability

• Uneven stress distribution: Composite structure spreads load effectively

• Construction damage: Integrated protection reduces installation defects

Risk Warnings and Mitigation Recommendations

• Ensure proper seam welding of geomembrane core

• Avoid excessive dragging during installation

• Protect exposed edges from UV degradation

• Conduct peel strength testing on bonded layers

Procurement and Selection Guide

1. Confirm hydraulic pressure and seepage requirements

2. Select geomembrane thickness based on design life

3. Determine nonwoven mass according to puncture risk

4. Check compatibility with local standards and codes

5. Request third-party laboratory test reports

6. Evaluate supplier project references and production capacity

Engineering Case Example

In a medium-sized irrigation reservoir project, a double-sided Nonwovens Composite Geomembrane with 0.75 mm HDPE core and 400 g/m² nonwoven layers was installed. The system improved construction efficiency, minimized seepage losses, and reduced maintenance compared to traditional clay lining methods.

Frequently Asked Questions

• What is the main advantage? Integrated impermeability and protection.

• Can it replace concrete lining? In many hydraulic applications, yes.

• Is welding required? Yes, for the geomembrane core seams.

• Does it allow drainage? The nonwoven layer supports filtration, not drainage.

• What thickness is common? 0.5–1.0 mm for most projects.

• Is it resistant to chemicals? Depends on geomembrane polymer selection.

• Can it be used on slopes? Yes, with proper anchoring design.

• How is quality checked? Peel, tensile, and permeability tests.

• What is the service life? Typically 20–30 years under proper conditions.

• Is geotextile separation still needed? Often unnecessary due to composite structure.

Call to Action

For project-specific quotations, detailed technical datasheets, or engineering samples of Nonwovens Composite Geomembrane, please submit your design parameters for professional assessment and procurement support.

E-E-A-T Author Credentials

This article is prepared by geotechnical engineers and materials specialists with extensive experience in geosynthetics, hydraulic engineering, and environmental containment systems. All information is based on established engineering practice, standardized testing methods, and verified project implementation data.