I. Performance Comparison ‌Property ‌ ‌HDPE Geomembrane ‌ ‌PVC Geomembrane ‌ Flexibility Low (≤15% elastic elongation) High (>20% elastic elongation) Tensile Strength ≥20 MPa ≥14 MPa Chemical Resistance Excellent (acids/alkalis/oil) Moderate Service Life Long-term durability Prone to aging Welding Performance Strong seams (requires precision) Easier but weaker welds Low-Temperature Resistance Excellent Good
II. Installation Complexity ‌Aspect ‌ ‌HDPE ‌ ‌PVC ‌ Deployment Requires specialized equipment Simple handling Welding Strict temp/speed control needed Simplified process Cold-Weather Adaptability Challenging Better adaptability
III. Cost Analysis ‌Factor ‌ ‌HDPE ‌ ‌PVC ‌ Material Cost Higher Lower Installation Higher (specialized labor) Lower Lifetime Value Higher ROI with extended lifespan Lower durability increases long-term costs
HDPE vs PVC Geomembranes IV. Application Scenarios ‌Project Type ‌ ‌Recommendation ‌ Landfills (high-standard) ‌HDPE ‌ (primary/secondary liners & caps) Chemical Treatment Ponds ‌HDPE ‌ (strong acid/alkali resistance) Temporary Containment ‌PVC ‌ (cost-effective solution)
V. Landfill-Specific Analysis ‌HDPE Advantages ‌: Superior chemical resistance against leachate 50+ year service life in permanent installations Withstands heavy stress loads ‌HDPE Limitations ‌: Demands certified welding technicians Higher initial investment ‌PVC Advantages ‌: Easier field modifications Lower material cost ‌PVC Limitations ‌: Vulnerable to plasticizer migration Reduced UV stability requires protective layers ‌Engineering Recommendation ‌: For landfills, HDPE remains the benchmark material per global sanitary standards due to its proven impermeability (10^5× lower permeability than compacted clay) and compatibility with composite lining systems (e.g., GCL + geotextile layers). PVC is reserved for temporary covers or non-hazardous applications.
