Description

What is Geomembrane LLDPE

LLDPE geomembrane is manufactured from virgin polyethylene resins, offering great flexibility and outstanding resistance to low temperature and ultraviolet exposure. High-quality and economical, it is intended for long life and exhibits a high degree of strength and durability.

Advantages of Geomembrane LLDPE

Landfill protection
The greatest volume usage of geomembranes is for landfill liners and caps. The sheets prevent landfill debris and leachate from infiltrating groundwater below or escape into the surrounding environment. Leachate collection systems integrate with geomembrane liners to enable safe treatment. Liners also reduce landfill gas emissions.

Remediation applications
At brownfield sites and contaminated properties, geomembranes isolate pollution like heavy metals, volatile organic compounds, or petroleum hydrocarbons until remediation is complete. This technique reduces migration into clean soils or groundwater. Covering contamination is cheaper than full removal in some cases.

Saltwater intrusion barrier
In coastal zones, subsurface geomembrane sheets function as saltwater intrusion barriers to block saline water from entering freshwater aquifers, with biogas digester. The impermeable lines allow freshwater abstraction while preventing saline intrusion inland. This unique use protects limited drinking water resources.

Durability
Unlike compacted clay and other natural liners, geomembranes are highly resistant to chemicals, acids, oils and temperature swings. Proper installation results in a continuous non-permeable layer with a long service life. Regular inspections help identify and repair any damage that could occur over decades of use.

Geomembrane LLDPE

Waterproof Impermeable PE Five-Layer Composite Geomembrane

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High quality

Our products are manufactured or executed to a very high standard, using the finest materials and manufacturing processes.

Professional team

Our professional team collaborates and communicates effectively with each other, and is dedicated to delivering high quality results. We are capable of handling complex challenges and projects that require our specialized expertise and experience.

Advanced equipment

A machine, tool or instrument designed with advanced technology and functionality to perform highly specific tasks with greater precision, efficiency and reliability.

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We try and respond to all concerns within 24 hours and our teams are always at your disposal in case of any emergencies.

Application of Geomembrane LLDPE

Landfills and Leachate Ponds

Landfills utilize HDPE geomembranes as liners to prevent leachate, which is a toxic liquid formed by rainwater percolating through waste, from contaminating the surrounding soil and groundwater. Leachate ponds, lined with HDPE geomembranes, collect and contain the leachate for proper treatment and disposal, ensuring environmental protection.

Mining and Tailings Management

In the mining industry, HDPE geomembranes as well as XR-5 Geomembranes serve as liners for tailings dams and containment ponds, preventing the release of hazardous chemicals and pollutants into the environment. These liners ensure the safe containment and management of mining by-products, reducing the risk of soil and water contamination.

Agricultural Water Storage

HDPE geomembranes are used in agricultural water storage systems, such as reservoirs, ponds, and irrigation canals, to prevent water seepage and optimize water management practices. These liners help conserve water resources, improve irrigation efficiency, and support sustainable agricultural practices.

Aquaculture and Fish Farming

In aquaculture facilities and fish farms, HDPE geomembranes are employed in pond liners to create a waterproof barrier, preventing water loss and seepage. These liners ensure optimal water retention, maintain water quality, and support the growth and health of aquatic organisms.

Precautions for Geomembrane LLDPE

Exercise caution during construction and usage to prevent damage to the large lldpe liner from sharp objects and tools. Maintain a clean construction site to minimize mechanical damage.

Prohibit smoking at the construction site and ensure the availability of firefighting facilities if necessary. Shoes with nails or high-heeled hard-soled shoes are not allowed on the membrane surface.
During construction, give special attention to ensuring that the laying is not overly tight, free from wrinkles, and the splicing is secure.

Regularly inspect the lldpe geomembrane surface for any damage or punctures during use. Promptly repair any issues to maintain the anti-seepage effectiveness.
Be mindful of the thermal expansion and contraction effects of the anti-seepage membrane material. Take appropriate measures to prevent soil, granular matter, or foreign objects from entering the geotextile layer after installation.

Commence each day's welding with a 0.9mm×0.3mm on-site trial sample, featuring an overlap width of no less than 10cm. Conduct on-site peeling and shearing tests using a tensile machine.
Ensure that welds are neat and aesthetically pleasing, without any slip welding or skipping.
When joints are affected by condensation, moisture, sediment, etc., perform welding only after appropriate treatment.

The Manufacturing Process of Geomembranes

The manufacturing process of a geomembrane is a very important procedure that needs to be done correctly in order to create a high-quality product. There are many steps involved in the manufacturing process, and each step is crucial to the overall success of the final product. First, the polymer resin is selected based on its chemical properties and compatibility with other materials. Then additives such as UV stabilizers and antioxidants are added to enhance its performance when exposed to sunlight or other environmental conditions. The mixture is then pressure-fed into a die that forms it into thin sheets which can be cut into different sizes depending on their intended application. Finally, quality control tests are performed to ensure that the geomembrane meets applicable standards before they are shipped out for installation.

Geomembrane LLDPE Technical specifications

Item	norm
Thickness mm	0.50	0.75	1.00	1.25	1.50	2.00	2.50	3.00
Density g/cm	≤0.939
Tensile breaking strength (longitudinal, transverse) N/mm	≥13	≥20	≥27	≥33	240	≥53	≥66	≥80
Elongation at break(longitudinal, transverse)%	=800
2% positive mold brightness N/mm	≤210	∈370	≤420	≤520	≤630	≤840	≤1050	≤1260
Right-angle tearing load (longitudinal, transverse) N	≥50	≥70	=100	≥120	≥150	≥200	≥250	≥300
Puncture strength N	≥120	≥190	≥250	≥310	=370	≥500	=620	≥750
Carbon black content	2.0-3.0
Carbon black dispersion	No more than 1 out of 10 data level 3, level 4, level 5 not allowed
Oxidation induction time(OIT)min	Atmospheric pressure oxidation induction time = 100				High pressure oxidation induction time = 400
Thermal aging at 85℃(Osh retention at atmospheric pressure after 90d)%	=35
UV resistance(OT retention after UV irradiation 1600h)%	=35

Geomembrane LLDPE Liner Installation Procedures

Pre-Installation Preparation

Clean the construction area thoroughly, removing sharp objects and debris to maintain a smooth foundation.
Check the land's drainage system to ensure efficient drainage beneath the lldpe low density polyethylene linear.

Base Layer Application

After cleaning, apply a layer of fine sand or fine gravel as a base layer, ensuring a secure fit for the lldpe liner sheet.

LLDPE Geomembrane Installation

Lay the LLDPE liner in the targeted area, taking care to avoid wrinkles. Ensure adequate overlap between the edges of the membrane, typically requiring 1-2 feet. Employ hot melt welding at connections to seal the seams.

Secure Fixation

Fix the lldpe geomembrane on the ground surface in the appropriate position to prevent any shifting.

What Is Difference of LDPE Geomembrane Vs LLDPE

Flexibility and stiffness: LDPE (Low-Density Polyethylene) and LLDPE (Linear Low-Density Polyethylene) geomembranes have different levels of flexibility and stiffness due to variations in their molecular structure.

Flexibility: LDPE geomembranes are known for their excellent flexibility. They have a highly branched and amorphous molecular structure, which allows them to exhibit superior flexibility and elongation properties. LDPE geomembranes can conform to irregular surfaces and accommodate ground movements, making them suitable for applications where flexibility is crucial.

Stiffness: LDPE geomembranes tend to be less stiff or rigid due to their highly branched molecular structure. This flexibility allows LDPE geomembranes to withstand deformation and elongation without rupturing or tearing. However, the lower stiffness of LDPE geomembranes can sometimes make them less suitable for applications that require higher structural integrity or resistance to mechanical stresses.

Chemical Resistance and Compatibility: Both LDPE (Low-Density Polyethylene) and LLDPE (Linear Low-Density Polyethylene) geomembranes offer good chemical resistance, but there are some differences in their chemical compatibility due to variations in their molecular structures. Here's a comparison of their chemical resistance and compatibility.

Methods to Repair the Leak of Geomembrane LLDPE

When the damaged part is small: This is the simplest and easiest damage to repair. Generally, the diameter of the damage is not more than 6mm. To repair such damage, you only need to clean up the damaged geomembrane and the surrounding area, and then use a squeeze torch to repair it.

When the damaged part is on the plane of the geomembrane: This is the most common and common type of damage. To repair such damage, you need to clean up the damaged part, measure the area of the damaged part, and then cut the repair material of the same material and thickness into a round or oval shape (the area is About three times the damaged part) cover the damaged part for repair. Generally, hot air gun, squeeze welding torch or special geomembrane glue is used to repair such damage.

When the damaged part is at the joint of the geomembrane: The occurrence of such damage is generally due to the cracking of the welded seam caused by the stress of the geomembrane. To repair such damage, the cracked welded seam must be cleaned up, and then re-welded with a double-track crawling welding machine. Use an extrusion welding gun for welding repair. After the repair is completed, the repaired part should be pressure tested to prevent cracking again.

When the damaged part is at the edge of the geomembrane or when the damaged part is larger or more: Generally, there is no need to repair such damage. You can cut the damaged geomembrane directly and re-lay the intact geomembrane for welding. load pressure range.

When the damaged part is at the corner or combined with other materials：It is very difficult to repair such damage, and the repair method should be carefully selected according to the actual situation. Generally, joints or places with small damage should be repaired with an extrusion welding torch, areas with small damage at the corners should be repaired with hot air guns, and areas with large damage at the corners should be patched with welding machines.

FAQ

Q: What is the difference between LDPE and LLDPE?

A: When compared to LDPE, LLDPE has much better tensile, impact, and tear strength, as well as greater seal strength. It can be more difficult to process when compared to LDPE, but many blends combine the two to improve stability and optics.

Q: What is LLDPE plastic used for?

A: LLDPE is a solid choice for grocery bags, trash bags, and shrink wrap film due to its strength and durability. If you're stashing multi-pack beverages for later, the shrink wrap that goes over plastic bottles is often made of LLDPE.

Q: What is geomembrane material?

A: Geomembranes are made from relatively thin continuous polymeric sheets, but they can also be made from the impregnation of geotextiles with asphalt, elastomer or polymer sprays, or as multilayered bitumen geocomposites. Continuous polymer sheet geomembranes are, by far, the most common.

Q: Why is LLDPE better than LDPE?

A: LLDPE is the most flexible of all the shrink films and does not strain harden. This means that as it cools down, it remains flexible, unlike LDPE. This flexibility means that it is not susceptible to surface cracking. LLDPE is a blended form of LDPE giving it flexibility, conformability and tensile strength.

Q: Why is LLDPE tougher than LDPE?

A: LDPE is a homopolymer constituted by ethylene monomers. LLDPE is a copolymer of ethylene and another longer olefin, which is incorporated to improve properties such as tensile strength or resistance to harsh environments.

Q: What is the purpose of a geomembrane?

A: Geomembranes are giant impermeable membranes made of (un)reinforced polymeric materials and used to stabilize earth and to secure landfills ensuring containment of hazardous or municipal wastes and their leachates.

Q: Is LLDPE better than HDPE?

A: For high density, HDPE is better, it is 0.941-0,965g/cm3. HDPE is used in strong packaging materials like drums, bottle caps, milk bottles. LLDPE is used in coating applications to protect liquid containers content. LDPE is used in light packaging materials like plastic wraps.

Q: Which is stronger LDPE or LLDPE?

A: A homopolymer is a polymer that is formed of the same repeating momoners. Therefore LDPE is a homopolymer made of ethylene monomers. It's cousin, LLDPE is a copolymer made of ethylene and another longer olefin. Because of this, LLDPE is improved giving it improved tensile strength and resistance of harsh environments.

Q: What category of plastic is LLDPE?

A: LLDPE is one of the various polyethylene resin types which differ by thickness and flexibility. High-density polyethylene (HDPE Resin) is the most robust and most chemical-resistant but not as flexible as LLDPE. Low-density polyethylene (LDPE) is very flexible but not as strong.

Q: Is HDPE a geomembrane?

A: HDPE geomembrane liner is the preferred product for lining projects. HDPE liner is resistant to many different solvents and are the most widely used geomembrane liner in the world. Although HDPE geomembrane is less flexible than LLDPE, it provides higher specific strength and can withstand higher temperatures.

Q: How is geomembrane manufactured?

A: The extrusion casting process is used to produce geomembrane sheets with LLDPE, LDPE, MDPE, HDPE, EVA, ECB, TPO, PVC, etc,as raw materials. The machine can be produce smooth surface, with a little rough surface sheet.

Q: What is the difference between GCL and geomembrane?

A: Geomembranes can have a smoother or textured surface. The textured surface provides enhanced friction characteristics which can be important in certain applications. Geosynthetic clay liners (GCLs) are made of a thin layer bentonite clay between two layers of nonwoven geotextiles.

Q: Is LLDPE plastic safe to use?

A: Thinner resins and rigid applications use a tough material that is chemical resistant. This prevents toxins from leaching into food, meaning that LDPE is food safe. It ranks at a 4 on the recycling number chart.

Q: Is LLDPE plastic food grade?

A: Virgin LDPE resins are safe for food contact. While recycled LDPE/PP blends have been approved for food contact by the FDA on two occasions, materials made from 100% PCR LDPE resin are not cleared for food contact. LDPE has good chemical resistance, high impact strength, and strong wear absorption.

Q: Can LLDPE be recycled?

A: There are several ways to recycle LLDPE, including mechanical recycling, where the material is melted down and turned into new products, and chemical recycling, where the material is broken down into its constituent chemical building blocks which are then used to produce new polymer products.

Q: Can you mix LLDPE and HDPE?

A: HDPE has still more crystallinity 60 – 80% and Tm, is 133-137 deg C. Its density is 0.926 – 0.941. LLDPE has strength of HDPE and flexibility of LDPE. Being members of same family, it can be blended with both.

Q: Can LDPE and Lldpe be recycled together?

A: Because of the similarity in properties and uses of low-density polyethylene and linear low-density polyethylene, and because they are often blended in a variety of applications, use and recycling of LDPE and LLDPE are often reported and carried out together.

Q: How thick is a geomembrane?

A: The thickness of the HDPE geomembrane used in anti-seepage and waterproof projects ranges from 0.5mm to 3.0mm. The thickness can be 0.75mm, 1.0mm, 1.25mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, etc. Use hot-melt welding equipment for joint processing.

Q: What is the service life of geomembrane?

A: The service life of HDPE geomembranes can reach more than a century or less than a decade. It depends on the material composition and the field's boundary conditions.

Q: What is the difference between LLDPE and HDPE liners?

A: LLDPE liners also have excellent UV resistance, which helps prolong their lifespan when exposed to sunlight. They are generally more cost-effective than HDPE liners and are available in a wide range of thicknesses. On the other hand, HDPE pond liners are known for their strength and durability.

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