Geomembrane

PVC Geomembrane
PVC (Polyvinyl Chloride) geomembranes is a thermoplastic waterproofing material made with vinyl, plasticizers, and stabilizers.
When ethylene dichloride is cracked into a dichloride, the result is then polymerized to make the polyvinyl chloride resin used for PVC geomembranes.
PVC geomembrane is tear, abrasion, and puncture-resistant, making them suitable for constructing canals, landfills, soil remediation, wastewater lagoon liners, and tank linings.
The material is also perfect for maintaining potable drinking water and preventing contaminants from entering water sources.

TRP Geomembrane
A TRP (Reinforced Polyethylene) geomembrane uses polyethylene fabric for long-term water containment and industrial waste applications.
TRP geomembranes are an ideal choice for soil remediation, landfills, canals, lining temporary retaining ponds, agricultural & municipal applications due to their low-temperature range, chemical resistance, and ultraviolet stability.

HDPE Geomembrane
High-Density Polyethylene (HDPE) is characterized by strong UV/temperature resistance, inexpensive material cost, durability, and high resistance to chemicals.
It is the most commonly used geomembrane because it offers higher thickness which other geomembranes don't. HDPE is the preferred choice for pond and canal lining projects, landfill, and reservoir covers.
Thanks to its chemical resistance, HDPE can be used in storing potable water.

LLDPE Geomembrane
LLDPE (Linear Low-Density Polyethylene) geomembrane is made with virgin polyethylene resins which make it strong, durable, and resistant to UV & low temperature.
Engineers and installers who require an impermeable geomembrane usually opt for LLDPE as it offers more flexibility compared to HDPE.
They are used in industrial applications, such as animal & environmental waste containments as well as liquid storage tanks.

RPP Geomembrane
RPP (Reinforced Polypropylene) geomembranes are polyester-reinforced liners made from a UV-stabilized polypropylene copolymer that gives the material stability, chemical resistance, and flexibility.
Its strength and durability can be traced to the support it gets with nylon scrim. RPP geomembranes are ideal for long-term water containment and industrial waste applications.
RPP is perfect for municipal applications, evaporation pond liners, aqua & horticulture, and mine tailings.

EPDM Geomembrane
EPDM (Ethylene Propylene Diene Monomer) geomembrane has a rubber-like texture that makes for its durability, UV-stability, strength, and flexibility.
They are ideal for extreme weather conditions and for resisting punctures. EPDM geomembranes are easy to install, typically used as surface barriers for dams, liners, covers, backyard landscape, and other irrigation sites.

Differences In Performance And Use
Geomembranerane is created from high-density polyethylene, which is largely utilized to prevent seepage. While geotextile is created from non-woven fabric, which is primarily utilized to strengthen the foundation. Its impermeability particularly depends on the impermeability of plastic film.
When we utilize them, we normally utilize them together. They are split into one cloth one membrane and two cloth one membrane, which has powerful anti-seepage performance.
Geotextile is a kind of porous geosynthetic material made from synthetic fiber by needling or weaving. Which is largely utilized in highways, railways, water conservancies, large-scale construction, power plant ash dam construction, non-ferrous metal tailings treatment, environmental protection engineering, water, and soil conservation, etc.
Geomembrane is a plastic membrane, and geotextile is thread cloth geotextile, which is mainly utilized in highway, railway, water conservancy, large-scale construction, power plant ash dam construction, non-ferrous metal tailings treatment, environmental protection engineering, water and soil conservation, etc.

Permeability
Geotextile is a kind of adequate geotechnical data. The layout needs the permeability coefficient of geotextile is better than 10 times that of the soil. Thus, to expand the front water head, it is feasible to carry the smaller size soil particles close to the geotextile into the geotextile under the impact of the permeability.
This problem gradually develops away from the geotextile, and slowly forms a particular viscosity of the overhead coating formulated of coarse soil particles. The particles in this coating are relatively harsh and the permeability coefficient is big, but it can not stop the movement of fine soil particles
When the filtering impact of geotextile is completely exerted, a natural filter layer will be developed on the upstream side of the overhead coating. The fine soil particle content of the natural filter coating is more than that of the overhead coating, and the water permeability is somewhat low, to obstruct the movement of the fine soil particles of the adjacent natural soil coating, so it plays a part in retaining soil. This is how geotextile plays a part.
Geomembrane is a kind of relatively porous geosynthetics. Different raw materials are categorized into polymer and asphalt. To meet the requirements of various strengths and deformation, there is a difference between unreinforced and reinforced. Polymer membranes are fabricated in the factory, while asphalt membranes are largely manufactured in the field.

Woven vs Non-Woven
Almost all geomembranes are extruded and non-woven to avoid small openings that would let water flow through. Geotextiles are often woven, which is one easy way to tell the difference between these two geosynthetics. A woven or even matted fibrous material will almost never offer enough impermeability to qualify as a geomembrane liner, especially for ponds and related structures. If water containment or vapor blocking is a secondary or primary goal, stick with a non-woven product. Woven geomembranes are too permeable to function well for these purposes.

Polyethylene (PE) and Reinforced Polyethylene (RPE)
Various forms of polyethylene tend to offer the best results when used for making geomembranes. High density polyethylene (HDPE) is commonly used, but it's often too thick and inflexible for demanding lining applications. Low density polyethylene (LDPE) offers better flexibility, but at the cost of durability and strength.

Polyvinyl Chloride (PVC)
PVC is one of the most widely available polymers used for geomembranes. It's a highly flexible and relatively strong material, but it still has many downsides when used specifically as a liner. First, it's not very chemical resistant. If the liner is installed in an exposed design, PVC tends to break down faster than other polymers due to weathering and UV degradation. It's also prone to becoming damaged by both high and low temperature extremes, making it a poor choice for lining roadways in practically any climate. Finally, PVC seams are also trickier to seal on site than RPE and other polyethylene products. Getting tight seams is essential for a leak-proof pond or containment area, so avoid PVC for these projects.

Polypropylene (PP)
Polypropylene geomembranes, often marked as fPP since there are rigid forms as well, are not as widely used as PVC or RPE liners. This material is easily fabricated in large sizes in the factory to reduce seams. However, this feature is balanced out by the material's weakness towards chlorine and other chemical additives in water. It's particularly reactive to hydrocarbons, making it a poor choice for lining refinery and mining holding and processing ponds. fPP is generally only used for ponds and some roadway projects, and it's not even the best choice for these uses in most cases.

Chlorosulfonated Polyethylene (CSPE)
CSPE is a modern, rubber polymer formula designed to overcome many of the limitations of PVC and other materials. It's specifically designed to resist damage from chemical reactions and corrosive mixtures, allowing it to directly contain hazardous compounds over years without breaking down. This material is also highly resistant to damage from ozone and sunlight, making it a good choice for exposed installation.

Polyester (PET)
Polyester is not as commonly used for impermeable geomembranes as the materials listed above. Yet it is still used at times, in conjunction with thicker geotextiles, as a finished layer on top for a smoother surface. If a ribbed or dotted geomembrane needs a barrier to prevent sediment from filling in its drainage surface, a thin layer of polyester liner may be used to separate the soil. Polyester breaks down more quickly than other materials, especially when installed in an exposed way, so it's best avoided except for temporary stabilization purposes. This material is more versatile in a geotextile form than as an impermeable geomembrane.

Polyurethane (PUR)
Polyurethane was once the most widely used geomembrane material, but it's largely fallen out of favor for more modern polymers. It's also unique in its ability to offer spray installation. Installers spray a thick layer of liquid PUR polymer over a fabric backing to conform exactly to the shape of the ground. While this was once necessary for some projects, today's flexible RPE liners can offer nearly as much conformity without the extra labor for installation. Each of the benefits of polyurethane, such as chemical resistance or good flexibility, is matched or exceeded by the features of RPE liners. Unless you're planning a highly reactive chemical storage project that specifies polyurethane as the only option, consider RPE instead for a wider range of exposed installation options.