impermeable geomembrane cost

1. Raw Material Preparation: Select high-quality base materials—non-woven geotextile (polypropylene/PP or polyester/PET) for protection, and geomembrane (high-density polyethylene/HDPE, low-density polyethylene/LDPE, or ethylene-vinyl acetate/EVA) for anti-seepage. Functional additives (UV stabilizers, anti-oxidants, anti-static agents) are mixed into the membrane resin.

2. Membrane Extrusion: The resin is melted at 160-200℃ in an extruder, then extruded through a flat die to form a continuous, uniform geomembrane sheet (thickness: 0.3-2.0mm).

3. Composite Bonding: The non-woven geotextile and geomembrane are bonded via thermal lamination (heat fusion at 120-150℃) or adhesive bonding (environmentally friendly hot-melt adhesive). Common structures include "geotextile + membrane" (single-sided composite) or "geotextile + membrane + geotextile" (double-sided composite) for enhanced protection.

4. Finishing Processes: The composite sheet undergoes calendering to ensure tight bonding and uniform thickness, followed by edge trimming, width cutting, and quality inspection (testing seepage coefficient, peel strength, tensile strength, and dimensional stability).

5. Rolling & Packaging: Qualified products are rolled into standard rolls, wrapped with moisture-proof film, and packaged for storage or export.

2. Key Advantages

• Dual-Function Integration: Combines the anti-seepage performance of geomembrane with the protective/reinforcement capabilities of non-woven geotextile, eliminating the need for separate installation.

• Excellent Seepage Resistance: Low permeability coefficient (≤1×10⁻¹¹ cm/s) effectively prevents water, sewage, or chemical leakage.

• Strong Mechanical Properties: High peel strength (≥3.0 N/mm) between layers, good tensile/tear resistance, and resistance to puncture during construction.

• Durability: Resistant to UV radiation, chemicals, microbial degradation, and extreme temperatures (-40℃ to 80℃), ensuring long service life (≥50 years for HDPE composite geomembrane).

• Easy Installation: Lightweight, flexible, and simple to weld (thermal welding for HDPE/LDPE membranes) and lay, reducing construction time and labor costs.

3. Application Fields

• Hydraulic Engineering: Reservoir, dam, and canal anti-seepage; river/lake bank reinforcement; and irrigation system lining.

• Environmental Protection: Landfill (domestic/in hazardous waste) liners and caps; sewage treatment plant lagoon lining; and mine tailing pond anti-seepage.

• Infrastructure Projects: Highway/railway subgrade waterproofing; tunnel lining; and airport runway moisture-proof layers.

• Agriculture & Aquaculture: Fish pond, shrimp pond, and water storage tank lining; and greenhouse soil moisture retention.

• Coastal Engineering: Coastal revetment anti-seepage; tidal flat reclamation; and saltwater intrusion prevention.

4. Packaging & Export Methods

• Standard Packaging:

◦ Roll specifications: Width 2-6m, length 50-100m (customizable); inner layer wrapped with PE plastic film to prevent moisture and dust.

◦ Outer packaging: Heavy-duty woven PP bags or waterproof kraft paper, reinforced with steel straps at both ends to avoid roll deformation during transit.

◦ Labeling: Each roll is marked with product details (material structure, thickness, seepage coefficient, peel strength, batch number, and certification logos like ISO, CE, ASTM).

• Export Logistics:

◦ Container Shipping: FCL (20ft/40ft containers) for bulk orders, LCL for small batches; rolls are palletized with wooden or plastic pallets to facilitate loading/unloading and prevent damage.

◦ Documentation: Commercial invoice, packing list, certificate of origin, quality inspection report, and compliance certificates (e.g., REACH for EU, FDA for US, JIS for Japan).

◦ Customized Services: OEM packaging (printed company logos, custom roll sizes) and pre-shipment inspection (PSI) coordination to meet client-specific requirements.