Flexible LLDPE geomembrane samples in black and green
Green and black LLDPE geomembrane sample
Flexible black LLDPE geomembrane sheet
Close-up of a flexible black LLDPE geomembrane liner
Rolled LLDPE geomembrane sheet on a white background
  1. Flexible LLDPE geomembrane samples in black and green
  2. Green and black LLDPE geomembrane sample
  3. Flexible black LLDPE geomembrane sheet
  4. Close-up of a flexible black LLDPE geomembrane liner
  5. Rolled LLDPE geomembrane sheet on a white background

LLDPE Geomembrane

Flexible linear low-density polyethylene liner with high elongation and low-temperature performance for aquaculture, soft ground, irregular basins and landfill covers.

Категория:

Product overview

LLDPE geomembrane (Linear Low-Density Polyethylene geomembrane) is an impermeable geosynthetic liner produced from LLDPE resin mixed with antioxidant and UV-stabilized carbon black via extrusion-blowing or calendering process. Compared with HDPE geomembrane, LLDPE features outstanding flexibility, high elongation at break and excellent low-temperature resistance. It adapts well to differential foundation settlement and irregular subgrade without easy cracking. It delivers zero water permeability and good acid-alkali chemical resistance, and can be hot-welded on site. Common thickness ranges from 0.5mm-2.0mm, popular sizes: 0.5mm, 0.8mm, 1.0mm, 1.5mm, roll width 2-6m. Smooth surface is standard.

Key features

  • Ultra-high elongation accommodates differential settlement and soft-ground movement
  • Retains flexibility in low-temperature environments with reduced brittle-cracking risk
  • Soft sheet conforms closely to curved, irregular and complex basin geometry
  • Non-toxic formulation suitable for aquaculture and water-containment projects
  • Compatible with hot-wedge and extrusion welding for reliable field seams
  • UV-stabilized options available for exposed outdoor service

Parameter

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General Required Properties
Property Unit GRI-GM17 Minimum Requirement Test Method
Density g/cm³ 0.915-0.939 ASTM D1505
Elongation at Yield % ≥ 12 ASTM D6693 (Type IV)
Elongation at Break % ≥ 800 ASTM D6693 (Type IV)
Carbon Black Content % 2.0 – 3.0 ASTM D4218 / D1603
Carbon Black Dispersion Rating Max Grade 3 ASTM D5596
Multiaxial Elongation % ≥ 30 ASTM D5617
Stress-Crack Resistance (SP-NCTL) h ≥ 500 ASTM D5397
Standard OIT min ≥ 100 ASTM D3895
High-Pressure OIT (HP-OIT) min ≥ 400 ASTM D5885
Thickness-Dependent Mechanical Properties
Property Unit 0.5 mm 0.8 mm 1.0 mm 1.5 mm 2.0 mm Test Method
Tensile Yield Strength kN/m 8 12.8 16 24 32 ASTM D6693
Tensile Break Strength kN/m 14 22.4 28 42 56 ASTM D6693
Tear Resistance N 64 102 125 187 249 ASTM D1004
Puncture Resistance N 160 256 320 480 640 ASTM D4833

Приложения

  • Fish ponds, shrimp farms, aquaculture reservoirs and decorative lakes
  • Farm reservoirs, irrigation canals, manure lagoons and biogas floating covers
  • Landfill caps, secondary liners and temporary containment ponds
  • Sewage lagoons, sludge drying beds and industrial wastewater basins
  • Mining evaporation ponds, solution holding ponds and temporary cofferdams
  • Cold-climate projects, uneven subgrades and irregular excavations

Specification and supply

Taiji supplies project-specific roll dimensions, surface options and formulation packages. Final selection should be confirmed against the operating environment, subgrade condition and installation plan.

Available options

  • Thickness: 0.5-3.0 mm
  • Maximum roll width: 6 m
  • Roll length: 50-200 m
  • Standard surface: smooth; textured grades available by custom order
  • Custom dimensions and OEM orders available

Frequently asked questions

What is LLDPE geomembrane?

LLDPE geomembrane is Linear Low-Density Polyethylene impermeable liner manufactured per GRI-GM17 standard. It is blended with antioxidant and carbon-black UV stabilizer, produced by extrusion-blowing process. It features high flexibility and ultra-high elongation.

What is the difference between LLDPE geomembrane and HDPE geomembrane?

LLDPE has better flexibility, higher elongation and superior low-temperature resistance, suitable for deformable foundation, aquaculture and landfill capping. HDPE is stiffer, with higher tensile strength and stronger chemical resistance, preferred for landfill primary liner, mining heap-leach pads and hazardous-waste projects. HDPE follows GRI-GM13, while LLDPE follows GRI-GM17.

Can LLDPE geomembrane be textured?

Yes, co-extruded textured LLDPE geomembrane is available upon custom order under GRI-GM17. Smooth LLDPE is the standard stock item for most projects.

What are main applications for LLDPE geomembrane?

Main applications include fish & shrimp aquaculture ponds, landscape lakes, manure lagoons, landfill capping cover, secondary liner, temporary containment ponds, irrigation canals, cold-region anti-seepage projects and biogas floating covers. It is not recommended as primary liner for high-risk heap-leach or hazardous-waste projects.

What thickness LLDPE geomembrane for fish-shrimp pond?

0.5 mm-0.8 mm for short-term small ponds; 1.0 mm for medium-large aquaculture projects; 1.5 mm is selected for long-term service and complex foundation conditions.

Can LLDPE geomembrane be used for landfill bottom primary liner?

Generally not recommended. HDPE geomembrane (GRI-GM13) is industry standard for landfill primary bottom liner. LLDPE is more suitable for capping cover layer and secondary liner.

Is LLDPE geomembrane safe for aquaculture?

Yes. Our LLDPE geomembrane is non-toxic, no harmful substance precipitation, safe for fish, shrimp and aquatic organisms. Smooth surface reduces algae attachment.

Can LLDPE geomembrane be hot-welded? What welding machines are compatible?

Yes. LLDPE liner can be welded by hot-wedge welder, extrusion welder and hot air gun. Welding temperature and speed need fine-tuned according to ambient temperature, different from HDPE welding parameters.

Does LLDPE geomembrane require geotextile protection layer?

Yes. Geotextile cushion layer is required above and below the liner to prevent puncture by sharp stones and debris, especially for exposed or back-filled projects.

Can LLDPE geomembrane adapt to uneven and soft foundation?

Thanks to its high elongation performance, LLDPE geomembrane tolerates differential settlement and soft ground deformation better than HDPE geomembrane.

What is the service life of LLDPE geomembrane?

For buried covered condition: service life over 25-30 years. For exposed outdoor condition with UV-stabilized formula: 8-12 years.

What standard does your LLDPE geomembrane follow?

Manufactured in accordance with GRI-GM17 specification, test reports including tensile, tear, puncture, OIT, carbon-black content can be provided.

How is low-temperature performance of LLDPE geomembrane?

LLDPE keeps good flexibility under low-temperature environment, less prone to brittle cracking compared with HDPE, suitable for cold-climate projects.

What thickness and width are available for LLDPE geomembrane?

Available thickness: 0.3 mm-2.0 mm; common sizes:0.5 mm,0.8 mm,1.0 mm,1.5 mm. Standard roll width: 2-8 m. Custom thickness, width and textured version are acceptable.

What is LLDPE geomembrane price per square meter?

Price depends on thickness, surface type (smooth/textured), roll width and total order quantity. Please send your project requirements for formal quotation.

Technical specifications

Density

Unit: g/cm³ • GRI-GM17 Minimum Requirement: 0.915-0.939 • Test Method: ASTM D1505
Elongation at Yield

Unit: % • GRI-GM17 Minimum Requirement: ≥ 12 • Test Method: ASTM D6693 (Type IV)
Elongation at Break

Unit: % • GRI-GM17 Minimum Requirement: ≥ 800 • Test Method: ASTM D6693 (Type IV)
Carbon Black Content

Unit: % • GRI-GM17 Minimum Requirement: 2.0 – 3.0 • Test Method: ASTM D4218 / D1603
Carbon Black Dispersion

Unit: Rating • GRI-GM17 Minimum Requirement: Max Grade 3 • Test Method: ASTM D5596
Multiaxial Elongation

Unit: % • GRI-GM17 Minimum Requirement: ≥ 30 • Test Method: ASTM D5617
Stress-Crack Resistance (SP-NCTL)

Unit: h • GRI-GM17 Minimum Requirement: ≥ 500 • Test Method: ASTM D5397
Standard OIT

Unit: min • GRI-GM17 Minimum Requirement: ≥ 100 • Test Method: ASTM D3895
High-Pressure OIT (HP-OIT)

Unit: min • GRI-GM17 Minimum Requirement: ≥ 400 • Test Method: ASTM D5885
Tensile Yield Strength

Unit: kN/m • 0.5 mm: 8 • 0.8 mm: 12.8 • 1.0 mm: 16 • 1.5 mm: 24 • 2.0 mm: 32 • Test Method: ASTM D6693
Tensile Break Strength

Unit: kN/m • 0.5 mm: 14 • 0.8 mm: 22.4 • 1.0 mm: 28 • 1.5 mm: 42 • 2.0 mm: 56 • Test Method: ASTM D6693
Tear Resistance

Unit: N • 0.5 mm: 64 • 0.8 mm: 102 • 1.0 mm: 125 • 1.5 mm: 187 • 2.0 mm: 249 • Test Method: ASTM D1004
Puncture Resistance

Unit: N • 0.5 mm: 160 • 0.8 mm: 256 • 1.0 mm: 320 • 1.5 mm: 480 • 2.0 mm: 640 • Test Method: ASTM D4833

IN THE FIELD

LLDPE geomembrane lining for an agricultural irrigation reservoir

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