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High-Temperature Resistant HDPE Geomembrane
Special-formula HDPE liner with enhanced OIT and HP-OIT retention for hot-climate containment, biogas lagoons, brine ponds and elevated-temperature wastewater service.
Product overview
High-temperature resistant HDPE geomembrane is a special HDPE impermeable liner manufactured from virgin HDPE resin blended with high-performance composite antioxidant system and carbon-black UV stabilizer via extrusion-blowing process, complying with GRI-GM13 specification. Enhanced OIT & HP-OIT greatly improves anti-thermal-oxidative-aging performance under high-temperature service. Service condition: long-term medium temperature ≤60℃; short-term peak surface temperature up to 80-85℃ under solar exposure. Not suitable for continuous immersion above 65℃.
Key features
- Enhanced thermal-oxidation resistance with Standard OIT >=120 min and HP-OIT >=500 min
- OIT retention >=55% after 90 days of thermal aging at 85°C
- Stable tensile, tear and puncture performance in smooth or textured grades
- Chemical resistance for manure lagoons, brine, leachate and industrial wastewater
- Compatible with hot-wedge and extrusion welding for robust field seams
- Carbon-black UV stabilization for combined high-temperature and solar exposure
Parameter
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| Property | Unit | Minimum Requirement | Test Method |
|---|---|---|---|
| Density | g/cm³ | ≥0.940 | ASTM D1505 |
| Elongation at Yield | % | ≥12 | ASTM D6693 (Type IV) |
| Elongation at Break | % | ≥700 | ASTM D6693 (Type IV) |
| Carbon Black Content | % | 2.0-3.0 | ASTM D4218 / D1603 |
| Carbon Black Dispersion | Rating | Max Grade 3 | ASTM D5596 |
| Stress-Crack Resistance (SP-NCTL) | h | ≥500 | ASTM D5397 |
| Standard OIT | min | ≥120 | ASTM D3895 |
| High-Pressure OIT (HP-OIT) | min | ≥500 | ASTM D5885 |
| OIT retention after 85℃-90d thermal aging | % | ≥55 | ASTM D5885 |
| Property | Unit | 1.5 mm | 2.0 mm | 2.5 mm | 3.0 mm | Test Method |
|---|---|---|---|---|---|---|
| Tensile Yield Strength | kN/m | 22 | 29 | 37 | 44 | ASTM D6693 |
| Tensile Break Strength | kN/m | 40 | 53 | 67 | 80 | ASTM D6693 |
| Tear Resistance | N | 187 | 249 | 311 | 374 | ASTM D1004 |
| Puncture Resistance | N | 480 | 640 | 800 | 960 | ASTM D4833 |
Приложения
- Biogas lagoons and high-temperature livestock-manure ponds
- Salt-field evaporation and crystallization ponds
- Mining evaporation ponds and lithium-brine holding basins
- Open-air landfill leachate holding ponds
- Landfill capping systems in hot-climate regions
- Industrial hot-wastewater and sludge lagoons with liquid temperature up to 60°C
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
- Surface: smooth, single-sided textured or double-sided textured
- Long-term medium temperature: <=60°C; not for continuous immersion above 65°C
Frequently asked questions
What is high-temperature resistant HDPE geomembrane?
High-temperature resistant HDPE geomembrane is special-formula HDPE liner complying with GRI-GM13. It adopts virgin HDPE resin plus high-efficiency composite antioxidant system and carbon-black UV stabilizer. Higher OIT & HP-OIT value improves anti-thermal-oxidative-aging performance under high-temperature working environment. Smooth, single-sided textured and double-sided textured are available.
What is the difference between high-temperature resistant HDPE and standard HDPE geomembrane?
Standard HDPE: OIT≥100 min, HP-OIT≥400 min, suitable for normal-temperature landfill, tailings ponds and common lagoons. High-temperature resistant HDPE: OIT≥120 min, HP-OIT≥500 min, with OIT retention ≥55 % after 85℃-90d thermal aging. It resists thermal-oxidative degradation better for hot manure lagoons, biogas ponds and salt evaporation ponds. Physical strength indexes are the same under equal thickness.
Can high-temperature resistant HDPE be textured?
Yes. Single-sided textured and double-sided textured high-temperature resistant HDPE geomembrane can be produced by co-extrusion process. Texture asperity height ≥0.25 mm.
What are main applications of high-temperature resistant HDPE geomembrane?
Main applications: livestock biogas lagoons, high-temperature manure lagoons, salt-field evaporation ponds, lithium-brine holding ponds, desert mining evaporation ponds, landfill leachate lagoons, hot-climate landfill capping and industrial hot-wastewater ponds. Long-term medium temperature shall not exceed 60 ℃.
Can it work under continuous liquid temperature above 65 ℃?
No. Even with enhanced antioxidant formula, polyethylene substrate will suffer accelerated creep and aging under continuous immersion above 65 ℃. Short-term peak surface temperature up to 85 ℃ from solar radiation is acceptable.
Is high-temperature resistant HDPE necessary for biogas manure lagoon?
Biogas fermentation will raise liquid temperature. High-temperature resistant grade is strongly recommended to slow down antioxidant consumption and extend service life. Standard HDPE will age faster under long-term fermentation heat.
Can high-temperature resistant HDPE geomembrane be hot-welded? What machines are compatible?
Yes. Compatible with hot-wedge welder, extrusion welder and hot air gun. Welding parameters are similar to standard HDPE. Adjust temperature and speed according to site ambient condition. For textured grade, polish off texture bumps on overlap area before welding.
Does high-temperature resistant HDPE geomembrane need geotextile protection layer?
Yes. Geotextile cushion shall be laid above and below the liner to prevent puncture from sharp stones and debris.
What is the service life of high-temperature resistant HDPE geomembrane?
Buried covered condition: over 30 years. For hot-liquid lagoons within 60 ℃ and exposed solar environment: 12-18 years, subject to actual operating temperature and site conditions.
What standard does your high-temperature resistant HDPE geomembrane follow?
Manufactured according to GRI-GM13 specification. Test reports including tensile, tear, puncture, OIT, HP-OIT and thermal-aging retention can be provided.
What thickness and width are available?
Common thickness:1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm. Standard roll width:2-6 m. Smooth, single-sided textured and double-sided textured can be customized.
IN THE FIELD
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