Black Hdpe Geomembrane

Product Definition

Black HDPE Geomembrane is a high-density polyethylene impermeable liner engineered for long-term containment, separation, and environmental protection applications. It offers excellent chemical resistance, UV stability, and mechanical strength for demanding civil and industrial engineering projects.

Technical Parameters and Specifications

All parameters below are aligned with commonly accepted international engineering practices and testing standards.

• Material: High Density Polyethylene (HDPE)

• Color: Black (carbon black content 2.0%–3.0%)

• Thickness Range: 0.5 mm – 3.0 mm

• Density: ≥ 0.94 g/cm³

• Tensile Strength at Yield: ≥ 15 MPa

• Elongation at Break: ≥ 700%

• Puncture Resistance: ≥ 500 N

• Carbon Black Dispersion: Grade 1–2

• Service Temperature: -40°C to +60°C

• Expected Service Life: > 50 years (proper installation)

Structure and Material Composition

Black HDPE Geomembrane is designed as a homogeneous or co-extruded polymer sheet with the following structure:

• Primary Resin Layer: Virgin HDPE resin providing mechanical strength

• Carbon Black Additive: UV protection and oxidation resistance

• Antioxidant Package: Thermal and long-term aging resistance

• Optional Textured Surface: Enhanced friction for slope stability

Manufacturing Process

The production of Black HDPE Geomembrane follows a controlled, engineering-grade manufacturing workflow:

1. Raw Material Preparation: Virgin HDPE resin blended with carbon black and stabilizers

2. Extrusion: Flat die or blown film extrusion equipment forms uniform sheets

3. Thickness Control: Automatic gauge control ensures tolerance within ±5%

4. Surface Treatment: Smooth or textured embossing based on application

5. Cooling & Annealing: Controlled cooling to reduce internal stress

6. Inspection & Testing: Mechanical, dimensional, and dispersion tests

7. Rolling & Packaging: Packed for transport with moisture and UV protection

Industry Comparison

Application Scenarios

Black HDPE Geomembrane is widely used across infrastructure and environmental engineering sectors:

• Landfill bottom liners and capping systems

• Mining leach pads and tailings dams

• Wastewater treatment lagoons

• Water reservoirs and canals

• Industrial containment ponds

• Agricultural irrigation storage

Core Pain Points and Solutions

• Leakage Risk: Solved by ultra-low permeability HDPE structure

• UV Degradation: Carbon black stabilizes long-term outdoor exposure

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

• Slope Instability: Textured geomembranes improve interface friction

Risk Warnings and Mitigation Measures

• Avoid subgrade sharp objects; use protective geotextile

• Ensure certified welding technicians for seam integrity

• Control thermal expansion during installation

• Perform non-destructive seam testing before commissioning

Procurement and Selection Guide

1. Define application environment and chemical exposure

2. Select appropriate thickness based on load conditions

3. Choose smooth or textured surface as required

4. Verify compliance with project specifications

5. Request batch testing reports

6. Confirm installation support and welding guidance

Engineering Case Example

In a municipal landfill expansion project, a 2.0 mm Black HDPE Geomembrane was installed over a compacted clay layer with protective geotextile. Dual-track hot wedge welding was applied, followed by air pressure testing. The system achieved zero leakage during commissioning and has remained operational under leachate exposure for over eight years.

Frequently Asked Questions

• Q1: What thickness is most common?
  A: 1.5–2.0 mm for containment projects.

• Q2: Is it suitable for drinking water?
  A: Yes, with appropriate certification.

• Q3: Can it be welded onsite?
  A: Yes, using hot wedge or extrusion welding.

• Q4: How long does installation take?
  A: Depends on area and complexity.

• Q5: Does black color affect performance?
  A: Yes, improves UV resistance.

• Q6: Is textured always better?
  A: Only for slope applications.

• Q7: Can recycled HDPE be used?
  A: Not recommended for critical containment.

• Q8: What testing is required?
  A: Tensile, puncture, dispersion, seam tests.

• Q9: How is it transported?
  A: Rolled and wrapped for protection.

• Q10: Can it be repaired?
  A: Yes, via localized patch welding.

Call to Action

For project-specific quotations, detailed technical datasheets, or engineering samples of Black HDPE Geomembrane, please submit your requirements to our technical sales team for professional support.

E-E-A-T Author Credentials

This article is prepared by a materials engineering team with over 15 years of experience in geosynthetics manufacturing, quality control, and large-scale civil engineering applications, supporting EPC contractors and international distributors worldwide.