PVC Geomembrane
Material：Polyvinyl chloride resin、Plasticizers、Stabilizers、Fillers
Feature：Excellent flexibility and extensibility、Extremely low permeability coefficient、Ageing resistance
Application Field：Environmental Engineering、hydraulic engineering、Municipal and Construction Engineering
Shipping Method：logistics
Product Category：Geomembrane
PVC geomembrane is a flexible, durable, and impermeable polymer sheet (typically with a thickness ranging from 0.5mm to 2.0mm) made from polyvinyl chloride (PVC) resin as the main raw material, mixed with additives such as plasticizers, stabilizers, fillers, and pigments, and produced through processes like calendering, doctor blading, or blow molding. It falls under the category of anti-seepage materials in geosynthetics, and its core function is to construct an artificial low-permeability barrier for isolating or controlling the migration of fluids (water, vapor, pollutants).
Performance
1、Mechanical Properties
Excellent flexibility and ductility:This is the most prominent feature of PVC geomembranes,enabling them to well adapt to uneven settlement and deformation of the foundation without easily developing stress cracks.
High tear strength and puncture resistance:Capable of withstanding breakthrough and puncture from underlying soil and rock materials.
Mechanical properties are usually measured by indicators such as tensile strength,elongation at break,and right-angle tear strength.
2、Impermeability Performance
Extremely low permeability coefficient:Typically less than 1.0×10⁻¹¹cm/s,and can even reach the order of 10⁻¹³cm/s.This is hundreds to millions of times that of clay anti-seepage layers,delivering excellent anti-seepage effects.
3、Durability and Weather Resistance
Chemical corrosion resistance:Resistant to acids,alkalis,salts,and various organic substances.However,it may swell in certain organic solvents(such as ketones,esters,and aromatic hydrocarbons),so the environmental medium must be considered during material selection.
Aging resistance:By adding UV stabilizers,UV radiation-induced aging can be effectively resisted,extending the service life in open-air environments.The designed service life is generally more than 20 years,and even longer in buried environments.
4、Weldability
Hot wedge welding:PVC geomembranes can be joined at seams using hot air welding or hot wedge welding machines,forming a complete and reliable anti-seepage system.Welding quality is crucial to the success or failure of the project.
Application
1、Environmental Protection Engineering
Solid waste landfills:Used as the base liner system and final cover system to prevent leachate from contaminating underground soil and water bodies.
Hazardous waste disposal sites:Require higher anti-seepage standards.
Sewage treatment plants:Used for anti-seepage in regulation tanks,anaerobic tanks,oxidation ponds,etc.
2、Water Conservancy Engineering
Artificial lakes,reservoirs,and river channels:Used as anti-seepage linings to reduce water resource leakage loss.
Irrigation canals:Achieve anti-seepage and water conservation.
3、Municipal and Construction Engineering
Basements and tunnels:Used as waterproof and moisture-proof layers.
Green roofs(roof gardens):Provide waterproofing and root barrier functions.
4、Other Fields
Aquaculture ponds(e.g.,fish and shrimp ponds),salt crystallization ponds,tailings ponds,emergency pollution containment,etc.
Specifications
| Property Category | Test Item | Unit | ndex Requirement (Nominal Value) | Test Standard |
| Physical Property | Thickness | mm | ≥ 0.75 (or as designed) | GB/T 6672 |
| Width | m | ≥ 2.0 (or as per contract) | GB/T 6673 | |
| Mechanical Properties | Tensile Strength (MD/XD) | MPa | ≥ 16.0 | GB/T 1040.3 |
| Elongation at Break (MD/XD) | % | ≥ 220 | GB/T 1040.3 | |
| Tear Resistance (MD/XD) | N | ≥ 70 | GB/T 1130 | |
| Dimensional Stability (MD/XD) | % | ≤ 4 | GB/T 12027 | |
| Hydraulic Property | Permeability Coefficient | cm/s | < 1.0×10⁻¹¹ | GB/T 18175.3 |
| Durability Properties | Low Temp. Impact Brittleness (-25°C) | — | Pass | GB/T 5470 |
| Heat Aging Performance (100°C, 96h) | % | Tensile strength retention rate ≥ 80 Fracture elongation retention rate ≥ 70 |
GB/T 7141 | |
| Water resistance | % | Tensile strength retention rate ≥ 80 Fracture elongation retention rate ≥ 70 |
Test after soaking | |
| UV resistance intensity retention rate* | % | ≥ 70 | According to the design agreement |
