LLDPE Geomembrane Liner

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Category Geomembranes Tags Geomembrane Manufacturers, LLDPE Geomembrane Liner

An LLDPE geomembrane liner is a high-performance synthetic membrane made from linear low-density polyethylene. It is designed for superior containment in environmental, agricultural, and civil engineering projects. Renowned for its exceptional flexibility, puncture resistance, and cost-effectiveness, this liner is a preferred choice for applications requiring adaptability to irregular surfaces, such as aquaculture ponds, landfill caps, and wastewater lagoons. As the leading geo liner manufacturers, BPM Geosynthetics provides LLDPE geomembrane liners that meet ASTM D7176 and GRI GM17 standards, ensuring top-tier quality and compliance.

Looking For Best geomembrane LLDPE Liners At Best Factory Price? BPM Geosynthetics Is The Trusted Geomembrane And Geotextile Manufacturer and Factory offering Best Solution for Global Customers.

1. What Is An LLDPE Geomembrane Liner?

LLDPE (Linear Low-Density Polyethylene) geomembrane liners are flexible, durable sheets used for containment in a wide array of applications. Manufactured from premium-grade polyethylene resins, these liners offer exceptional resistance to chemicals, UV radiation, and punctures, making them a superior choice for various industries. LLDPE geomembranes are characterized by their linear molecular structure, which provides enhanced tensile strength and flexibility compared to other polyethylene materials. This unique structure allows LLDPE liners to conform to uneven surfaces and withstand significant differential settlement, ensuring long-term performance and reliability. They typically consist of approximately 97.5% polymer and 2.5% additives like carbon black, antioxidants, and heat stabilizers to enhance their properties and lifespan.

2. Technical Data Of BPM LLDPE Geomembrane Liner

PROPERTIES	Test method	Unit	BPM50	BPM75	BPM100	BPM150	BPM200	BPM250
Thickness (minimum average)	ASTM D 5199	millimeters	0.5	0.75	1	1.5	2	2.5
Thickness (lowest individual reading)	ASTM D 5199	millimeters	0.45	0.67	0.9	1.35	1.8	23
Density (min.)	ASTM D 1505	g/cm3	0.92	0.92	0.92	0.92	0.92	0.92
Tensile properties (minimum average)	ASTM D 6693
Strength at rest		kN/m	14	20	27	40	55	66
Elongation at break		%	800	800	800	800	800	800
Tear resistance (minimum average)	ASTM D 1004	north	50	70	100	150	200	250
Puncture resistance (minimum average)	ASTM D 4833	north	120	190	250	370	500	620
Carbon black content (minimum average)	ASTM D 1603	%	2	2	2	2	2	2
Carbon black dispersion (minimum average)	ASTM D 5596	Cat. 2	Cat. 2	Cat. 2	Cat. 2	Cat. 2	Cat. 2	Cat. 2
Brittleness at low temperatures	ASTM D 746	C	< -77	< -77	< -77	< -77	< -77	< -77
Oxidative induction time (OIT) (minimum average)	ASTM D 3895	minutes	100	100	100	100	100	100
Melt flow index (190 °C, 2.16 kg)	ASTM D 1238	grams/10 minutes	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0
2% module	ASTM D 5323	kN/m	210	370	420	630	840	1050
Dimensional stability (100˚C, 1 hour)	ASTM D 1204	%	± 1	± 1	± 1	± 1	± 1	± 1
Axisymmetric rupture deformation	ASTM D 5617	%	56	56	56	56	56	56
Brittleness at low temperatures	ASTM D 746	C	< – 77	< -77	< -77	< -77	< -77	< -77

3. What Are Features Of LLDPE Geomembrane Liner?

LLDPE geomembrane liners boast a unique combination of properties that make them an ideal choice for containment applications:

Exceptional Flexibility:LLDPE’s linear molecular structure allows for superior flexibility, enabling the liner to conform to irregular surfaces and accommodate differential settlement without compromising its integrity.
High Tensile Strength:LLDPE geomembranes exhibit excellent tensile strength, providing resistance to tearing and stretching under stress.
Superior Chemical Resistance:These liners are resistant to a wide range of chemicals, including acids, alkalis, and solvents, making them suitable for use in harsh environments.
Excellent UV Resistance:The addition of carbon black provides exceptional resistance to ultraviolet (UV) degradation, ensuring long-term performance in exposed applications.
Low Permeability:LLDPE geomembranes offer low permeability, effectively preventing the leakage of contained liquids and gases.
High Puncture Resistance:These liners demonstrate high resistance to punctures, minimizing the risk of damage from sharp objects or uneven subgrades.
Good Weldability:LLDPE geomembranes can be easily welded using various techniques, creating strong and reliable seams.
Durability:LLDPE geomembranes are designed for long-term performance, often exceeding the lifespan of the projects they serve.
Cost-Effective:Compared to other lining materials like concrete or clay, LLDPE geomembranes offer a cost-effective solution without compromising performance.
Easy Installation:LLDPE geomembranes are relatively easy to install, reducing labor costs and project timelines.

4. What Are Benefits of LLDPE Geomembrane Liner

LLDPE geomembrane liners offer significant advantages for project efficiency, environmental protection, and cost savings:

Superior Flexibility: Conforms to uneven surfaces, reducing installation time by 20% and minimizing puncture risks by 15% compared to stiffer liners.
Cost-Effectiveness: Priced at $0.4–$1.5 per m², 20–30% cheaper than HDPE or PVC for flexible applications, per BPM Geosynthetics data.
Environmental Protection: Prevents 99.8% of leachate migration in landfills and ponds, safeguarding groundwater per EPA standards.
Longevity: Achieves a 50–70 year lifespan when covered, reducing replacement costs by 75% compared to clay liners.
Ease of Installation: Prefabricated panels up to 6 m wide reduce field welding by 15%, lowering labor costs by 10%.
Versatility: Operates in -40°C to 60°C, suitable for diverse climates and applications like aquaculture and mining.

These benefits make LLDPE liners an economical and sustainable solution for containment projects worldwide.

5. How Thick Is the LLDPE Geomembrane Liner? mm, Mils, and Micron

LLDPE geomembrane liners are available in a range of thicknesses to meet diverse project requirements, typically from 0.3 mm to 3.0 mm. Thickness is expressed in millimeters (mm), mils (1 mil = 0.0254 mm), and microns (1 micron = 0.001 mm). Standard thicknesses include:

0.3 mm (12 mils, 300 microns): Lightweight, used for low-stress applications like decorative ponds.
0.5 mm (20 mils, 500 microns): Common for aquaculture and small-scale water containment.
0.75 mm (30 mils, 750 microns): Balances flexibility and strength for irrigation canals.
1.0 mm (40 mils, 1000 microns): Standard for landfill caps and wastewater lagoons.
1.5 mm (60 mils, 1500 microns): Used in mining and moderate-stress environments.
2.0 mm (80 mils, 2000 microns): Ideal for high-risk containment like hazardous waste.
3.0 mm (120 mils, 3000 microns): Heavy-duty for extreme conditions, such as tailings ponds.

Thicker liners (e.g., 60+ mils) provide 25% greater puncture resistance (300 N, ASTM D4833) and 40% improved stress crack resistance, per GRI GM17 standards. Selection depends on subgrade conditions, load stress, and regulatory requirements, with 40-mil liners being the most versatile for cost and performance.

6. What Is the Difference Between LLDPE Liner and PVC Liner?

LLDPE and PVC geomembrane liners serve similar containment purposes but differ in composition, performance, and application suitability:

6.1 Material Composition

LLDPE: Composed of linear low-density polyethylene (97.5% resin, 2.5% carbon black, antioxidants), with a density of 0.915–0.935 g/cm³, offering high elasticity.
PVC: Made from polyvinyl chloride with plasticizers, with a density of 1.2–1.4 g/cm³, providing greater flexibility but reduced rigidity.

6.2 Thickness and Strength

LLDPE: Ranges from 0.3–3.0 mm (12–120 mils); 40 mils meets most containment standards. Offers 300 N puncture resistance and 600% elongation.
PVC: Typically 0.5–1.5 mm (20–60 mils); 30 mils suffices for EPA compliance due to flexibility. Provides 267 N puncture resistance but 700% elongation.

6.3 Chemical Resistance

LLDPE: Excels in resisting hydrocarbons and solvents, ideal for mining and oil containment, with 97% integrity retention.
PVC: Better for municipal solid waste landfills with neutral pH leachates; less resistant to hydrocarbons, losing 10% integrity in aggressive environments.

6.4 UV and Temperature Performance

LLDPE: 90% UV resistance for 10+ years exposed; performs at -40°C to 60°C, suitable for cold climates.
PVC: Requires soil cover to prevent UV degradation within 5 years; loses flexibility below 0°C, limiting cold-weather use.

6.5 Installation

LLDPE: Thermally welded, with prefabricated panels reducing field seams by 15%; conforms 20% better to subgrades.
PVC: Highly flexible, supporting adhesive bonding and 20% fewer seams; excels in complex subgrade contours.

6.6 Cost

LLDPE: $0.4–$1.5 per m², cost-effective for large-scale projects with flexible requirements.
PVC: $0.8–$2.5 per m², pricier due to plasticizer costs, better for smaller, flexible applications.

Recommendation: Choose LLDPE for large-scale, chemically aggressive, or cold-climate projects requiring flexibility and UV resistance; select PVC for smaller, neutral-pH applications needing high conformability.

7. What Is LLDPE Geomembrane Liner Used For?

LLDPE geomembrane liners are versatile, addressing critical containment needs across multiple industries:

Aquaculture Ponds

Used in fish and shrimp ponds, 20–40 mil liners prevent 98% water loss and maintain water quality, boosting yields by 15% in regions like Indonesia.

Landfill Caps and Liners

Provides 99.8% leachate containment in municipal and hazardous waste landfills, meeting EPA Subtitle D standards with 40–60 mil liners.

Water Containment

Lines irrigation canals, reservoirs, and golf course ponds, reducing seepage by 95% and supporting water conservation in drought-prone areas.

Wastewater Treatment

Contains aggressive effluents in treatment lagoons, with 60-mil liners ensuring 96% chemical resistance for long-term performance.

Mining Operations

Used in tailings ponds and heap leach pads, 60–80 mil liners resist acidic leachates and withstand 25% higher puncture risks.

Biogas and Agricultural Lagoons

Supports methane capture in dairy farm ponds and manure storage, with 40-mil liners offering 90% impermeability.

Secondary Containment

Prevents oil and chemical spills in industrial facilities, using 40–60 mil liners for 98% containment efficiency.

These applications underscore LLDPE’s adaptability to flexible, environmentally sensitive containment needs.

About BPM Geosynthetics

BPM Geosynthetics, as one of the largest geo liner manufacturers and companies in China, is renowned for strong geomembrane liners and geotextile liners manufacturing alibilities. We offer complete range of best quality geomembranes, geotextiles and related geosynthetic liners at competitive factory price for your environmental, civil engineering and mining applications.

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