1. Low permeability: The surface is smooth and has no pores. The permeability coefficient can be as low as 10⁻¹³ cm/s (such as HDPE material), which far exceeds the industry's anti-seepage requirements.
2. No leakage risk: Avoid the potential leakage risk caused by microscopic defects in the texture structure of the rough surface.
3. Easy to weld: The double-smooth surface has a closer contact during hot-melt welding, the weld strength is higher, and the inspection pass rate is improved.
4. Fast laying speed: The friction resistance of the double-smooth surface is smaller than that of the rough surface, and the mechanical spreading efficiency is higher than that of the rough surface film.
Introduction
Double-sided smooth geomembrane refers to a synthetic anti-seepage membrane with smooth surfaces on both sides. It is made of high molecular polymers (such as HDPE, LLDPE, PVC, etc.) through extrusion, calendering or blow molding, without any texture or rough surface structure.
Key Features
1. The surface is smooth and flat, with a low friction coefficient (usually 0.1~0.3). There is no bumpy texture, and the touch is similar to plastic film, but the thickness and strength are higher than plastic film.
2. The material is high-density polyethylene (HDPE), which has strong chemical resistance and long service life.
3. The thickness range is 0.5mm~3.0mm, which can be customized according to engineering needs.
Application
1. Static anti-seepage: drinking water reservoirs, sewage treatment pools, oil tank linings
2. Closed systems: underground tunnel waterproofing, biogas tank sealing
3. Temporary projects: emergency anti-seepage cofferdams (quick laying requirements)
Technical Parameters
1. Physical Properties
Parameter | Standard Value | Test Method | Description |
Thickness (mm) | 0.5 - 3.0 (±10%) | ASTM D5199 | Thickness determines puncture resistance and hydrostatic pressure resistance |
Density (g/cm³) | 0.940 - 0.965 | ASTM D792 | Virgin resin with better anti-aging |
Surface Friction Coefficient (Static Friction) | 0.10 - 0.25 | ASTM D5321 | Low friction requires anti-slip design |
2. Mechanical Properties
Parameter | Standard Value | Test Method | Description |
Tensile Strength (longitudinal/transverse, N/mm) | ≥25 | ASTM D6693 | Resistance to foundation deformation |
Elongation at Break (%) | ≥700% | ASTM D6693 | High Elongation to adapt to uneven settlement |
Right-angle Tear Strength (N) | ≥150 | ASTM D1004 | Mechanical damage resistance |
Puncture Strength (N) | ≥400 | ASTM D4833 | Resistance to stone or root puncture |
3. Anti-seepage Performance
Parameter | Standard Value | Test Method | Description |
Permeability Coefficient (cm/s) | ≤1×10⁻¹³ | ASTM E96 | Nearly impermeable |
Hydrostatic Pressure Resistance (MPa) | ≥0.8 (1mm thick) | ASTM D751 | 1mm membrane can withstand 80 meters of water |
4. Durability
Parameter | Standard Value | Test Method | Description |
Oxidation Induction Time (OIT, min) | ≥100 (standard OIT) | ASTM D3895 | Anti-oxidation aging ability |
Carbon Black Content (%) | 2.0~3.0 | ASTM D1603 | Key indicators of UV Resistance |
Low-temperature Brittleness Temperature (°C) | ≤-60 | ASTM D746 | Applicability in extremely cold regions |
5. Welding Performance
Parameter | Standard Value | Test Method | Description |
Weld Shear Strength (N/mm) | ≥20 (≥80% of parent material) | ASTM D6392 | Welding quality directly affects the anti-seepage effect |
6. Chemical Resistance
Parameter | Standard Value | Test Method | Description |
pH Range | 0-14 (all acid and alkali resistane) | ASTM G155 | Can withstand strong acid, strong alkali and salt solution |
Organic Solvent Resistance | Excellent (oil and hydrocarbon resistant) | ASTM D5747 | Applicable to petrochemical projects |
Why Choose Double-Sided Smooth HDPE Liner?
1. For projects with absolute need for anti-seepage: such as drinking water reservoir projects and chemical anti-seepage projects.
2. Construction efficiency needs to be prioritized: such as large-scale rapid laying to reduce the risk of welding failure.
3. For cost-sensitive: Since the surface of the smooth geomembrane does not require additional processes, the price is about 10%~20% cheaper than the rough geomembrane.
Packaging
1. Each roll of geomembrane is securely packed with moisture-proof packaging to ensure that the geomembrane is protected from moisture and environmental damage during transportation.
2. To prevent physical damage, we use protective corners and cushioning materials to reinforce the packaging to prevent scratches, punctures or deformation.
3. For HDPE geomembranes, we have specialized packaging solutions - using breathable materials in hot conditions and insulating liners in cold climates to prevent the geomembrane from melting or becoming brittle.
Company's Strength
Founded in 2008, Haoyang Environmental is a leading geosynthetics manufacturer in China, focusing on geomembrane R&D, production and engineering construction. With rich production and construction experience, we can provide customized products according to customers' different project specifications.
We purchase high-quality raw materials from top suppliers in China and have a number of patented technologies and industry-leading production lines. Our strict quality and cost management system ensures that our products always provide high performance with a competitive price.
Haoyang Environmental is committed to sustainable innovation and promotes industry progress through environmental solutions and continuous technological research and development.
