Waterproof Hdpe Geomembrane

Product Definition

Waterproof HDPE Geomembrane is a high-performance impermeable liner manufactured from high-density polyethylene resin, designed to provide long-term waterproofing and containment for environmental, civil, and hydraulic engineering projects requiring reliable fluid and gas barriers.

Technical Parameters and Specifications

The following parameters are commonly referenced in engineering design, tender documents, and procurement specifications for Waterproof HDPE Geomembrane:

• Raw Material: High-density polyethylene (HDPE)

• Thickness Range: 0.5 mm – 3.0 mm

• Standard Width: 5.0 m – 8.0 m

• Roll Length: 50 m – 200 m

• Tensile Strength at Yield: ≥ 15 MPa

• Elongation at Break: ≥ 700%

• Puncture Resistance: ≥ 300 N

• Carbon Black Content: 2.0% – 3.0%

• UV Resistance: ≥ 90% retained after 1600 hours

• Service Life: ≥ 50 years under standard conditions

Structure and Material Composition

Waterproof HDPE Geomembrane is a homogeneous polymer sheet engineered for durability and chemical stability:

• HDPE Polymer Matrix: Provides impermeability and chemical resistance

• Carbon Black Additives: Enhance UV stability and weather resistance

• Antioxidants: Slow thermal aging and oxidation

• Smooth or Textured Surface: Optional for slope friction and anchorage

Manufacturing Process

The manufacturing of Waterproof HDPE Geomembrane follows a controlled industrial process:

1. Resin Compounding: HDPE resin blended with stabilizers and additives

2. Extrusion: Flat-die or blown film extrusion forms continuous sheets

3. Surface Texturing: Optional embossing for increased friction

4. Cooling and Calibration: Ensures uniform thickness and flatness

5. Online Inspection: Thickness, surface, and defect monitoring

6. Mechanical Testing: Tensile, tear, and puncture performance verification

7. Rolling and Packaging: Controlled winding to prevent deformation

Industry Comparison

Application Scenarios

Waterproof HDPE Geomembrane is specified by EPC contractors, engineering consultants, and distributors for:

• Landfill bottom liners and capping systems

• Mining leach pads and tailings ponds

• Wastewater treatment lagoons

• Reservoirs, canals, and irrigation ponds

• Industrial liquid containment facilities

• Aquaculture ponds and water storage tanks

Core Pain Points and Engineering Solutions

• Leakage Risk: High-density polymer structure ensures zero permeability

• Chemical Degradation: HDPE resists acids, alkalis, and hydrocarbons

• UV Exposure: Carbon black stabilization extends outdoor service life

• Installation Stress: High elongation absorbs subgrade movement

Risk Warnings and Mitigation Measures

• Subgrade must be properly compacted and free of sharp objects

• Qualified welding technicians are required for seam integrity

• Thermal expansion should be considered during installation

• Protective geotextiles are recommended for puncture prevention

Procurement and Selection Guide

1. Define project application and containment requirements

2. Select thickness based on hydraulic pressure and load

3. Determine smooth or textured surface requirements

4. Verify compliance with ASTM or ISO standards

5. Review factory quality control and test reports

6. Confirm installation support and seam testing procedures

Engineering Case Study

In a municipal wastewater lagoon project, a 1.5 mm Waterproof HDPE Geomembrane was installed over a compacted clay subgrade with protective geotextile layers. Double-track hot wedge welding and vacuum testing ensured seam integrity. After five years of operation, no leakage or material degradation was observed.

Frequently Asked Questions

• Q1: Is HDPE geomembrane fully waterproof?
  A: Yes, it provides near-zero permeability.

• Q2: What thickness is commonly used?
  A: 1.0–2.0 mm for most applications.

• Q3: Can it resist chemicals?
  A: Yes, it has excellent chemical resistance.

• Q4: Is UV exposure an issue?
  A: Carbon black ensures UV stability.

• Q5: How are seams welded?
  A: Hot wedge or extrusion welding.

• Q6: Can it be used on slopes?
  A: Yes, textured surfaces improve friction.

• Q7: What is the expected lifespan?
  A: Over 50 years under normal conditions.

• Q8: Is protective geotextile required?
  A: Recommended for puncture resistance.

• Q9: What standards apply?
  A: ASTM D638, D6693, ISO equivalents.

• Q10: Can geomembrane be repaired?
  A: Yes, localized patch welding is possible.

Call to Action

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E-E-A-T Author Credentials

This article is prepared by professionals specializing in geosynthetics engineering, containment system design, and environmental infrastructure projects, with extensive experience supporting EPC contractors and international procurement teams.