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Chapter 1 General Introduction
HDPE (High-Density Polyethylene) geomembranes are superior impermeable liners, widely used in Central Asia’s water conservancy, mining, and environmental projects. With excellent chemical resistance, high puncture strength, and UV stability, they effectively prevent seepage, control pollution, and adapt to arid, mountainous, and chemically harsh environments. As a core material for regional water security and ecological protection, they ensure long-term durability and cost-effectiveness for large-scale infrastructure.
Chapter 2 HDPE Liner Sizes & Thickness
| Item | Specification Range | Common Options |
| Thickness | 0.25 mm – 3.0 mm | 0.75, 1.0, 1.5, 2.0, 2.5, 3.0 mm |
| Width | 1 m – 10 m | 2, 4, 6, 7 m |
| Length | Customizable | 50, 100, 200 m per roll |
| Surface | Smooth / Textured | Textured height: 0.25–0.5 mm |
Chapter 3 Technical Parameters
| No. | Parameter Item | Standard Index |
| 1 | Density | ≥0.940 g/cm³ |
| 2 | Tensile Yield Strength | ≥17 MPa |
| 3 | Tensile Break Strength | ≥32 MPa |
| 4 | Elongation at Break | ≥600% |
| 5 | Puncture Resistance | ≥320 N |
| 6 | Tear Resistance | ≥150 N |
| 7 | Oxidation Induction Time (OIT) | ≥100 min (190℃) |
| 8 | UV Resistance Retention | ≥80% after 1500h |
| 9 | Low-Temperature Brittleness | Pass at -70℃ |
| 10 | Water Vapor Permeability | ≤1.0×10⁻¹³ g·cm/(cm²·s·Pa) |
| 11 | Chemical Resistance | Stable to acids/alkalis/salts |
| 12 | Heat Aging Stability | No cracking at 80℃/168h |
| 13 | Carbon Black Content | 2.0%–3.0% |
| 14 | Melting Index | 0.2–0.8 g/10min |
| 15 | Seam Shear Strength | ≥80% of base material |
| 16 | Service Life | ≥50 years (buried) |
Chapter 4 Application Fields in Central Asia
1.Water Conservancy & Irrigation: Lines reservoirs, canals, and ponds to reduce seepage loss, critical for arid regions with 40%+ channel leakage.
2.Mining Tailings Management: Serves as liners for tailings dams and heap leach pads, isolating acidic/heavy-metal solutions to prevent groundwater contamination.
3.Solid Waste Landfills: Provides multi-layer liners/caps for landfills, blocking leachate and meeting strict environmental regulations.
4.Aquaculture: Lines fish/shrimp ponds to retain water quality, prevent seepage, and avoid soil contamination, boosting yields.
5.Wastewater Treatment: Lines lagoons, evaporation ponds, and industrial basins, resisting corrosive effluents for long-term operation.
6.Environmental Remediation: Acts as barriers in contaminated sites to control harmful substance diffusion, supporting ecological restoration.
Chapter 5 Installation Steps in Different Environments
1.Arid/Flat Terrain: Grade site to 2% slope, remove stones, lay HDPE geomembrane with 15–20 cm overlap, weld via hot wedge, conduct air/leak tests, and backfill with soil.
2.Mountainous/Uneven Ground: Pre-lay geotextile for reinforcement, adjust panels to fit terrain, ensure tight welding, and cover with protective layers. Chemical/Mining Areas: Thicken liner to 1.5–2.0 mm, use textured surfaces for friction, add secondary liners, and perform strict leak detection to resist acid/alkali corrosion.
3.Chapter 6 Haoyang Environmental’s Overseas Projects in Central Asia
1.Kazakhstan Landfill Project: Supplied 2.0mm HDPE liners for a national solid waste landfill, solving leakage issues and supporting the country’s 2030 waste management reform.
2.Uzbekistan Mining Tailings Project: Provided customized HDPE liners for a gold mine’s heap leach pads, ensuring safe containment of cyanide-based solutions and meeting GISTM standards.
3.Kyrgyzstan Reservoir Lining Project: Delivered HDPE geomembranes for reservoir rehabilitation, reducing seepage loss and supporting regional water security amid aging infrastructure.
Chapter 7 Haoyang Environmental’s Development Trends in Central Asia
Haoyang Environmental will focus on localized technical support to adapt to Central Asia’s diverse environments—arid, mountainous, and chemically harsh. It will deepen cooperation with local governments and mining firms, offering tailored solutions for water conservancy, tailings management, and landfill projects. The company will expand its regional warehouse network to ensure fast delivery, enhance after-sales services with on-site installation guidance, and pursue international certifications (GRI-GM13, ISO) to build trust. By strengthening partnerships and optimizing logistics, Haoyang aims to become a leading HDPE geomembrane solutions provider, supporting Central Asia’s sustainable development and water security goals.
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