Do you know What is Geomembrane?

Geomembrane is a plastic construction material product,which is waterproof,impermeable,mainly used for the seepage control projects to have an impermeable containment or barrier.

Geomembrane is one kind of geosynthetic products,with the excellent property and competitive price advantage.It is used in many industries,water management,oilgas, environment,aquaculture,agriculture.

Geomembrane is made of polyethylene resin at special formula,our products include hdpe geomembrane, lldpe geomembrane, smooth geomembrane and textured geomembrane,all the products use 100% virgin material, no recycled secondary material.

what are the geomembrane types?

There are different kinds of geomembrane, for example hdpe geomembrane, lldpe geomembrane, EPDM geomembrane, PVC geomembrane and so on.The different geomembrane have different features, and the applications are different too.

  1. HDPE

HDPE geomembrane is High density polyethylene, it is the most widely used geomembrane liner in the world,because the longer service life,strong technical property and competitive price. It is used for landfill,mining,water covers and canal liners.The low cost and high chemical resistance make it more popular.

  1. LLDPE

LLDPE geomembrane is Linear low density polyethylene geomembrane,it is more flexible than HDPE geomembrane, easy to install.The property let it low temperature and uv resistant.It can be used for water tanks,landfill cover and aquaculture containments.

  1. PVC

PVC geomembrane is Polyvinyl chloride geomembrane ,it is made of vinyl,plasticisers and stabilisers.PVC geomembrane is highly flexible and can be used for landfill,tanks, lagoon projects, but not good for aquaculture fish shrimp ponds.

  1. EPDM

EPDM geomembrane is Ethylene propylene diene monomer geomembrane,it is flexible and durable material, rubber material with good uv resistant.it is typically used for dam, agriculture,irrigation projects.but it is too heavy.

Geosynthetic co.,ltd is a manufacturer of PE geomembrane,hdpe geomembrane and lldpe geomembrane, use 100% high quality virgin polyethylene raw material to make geomembrane. the main component of geomembrane liner is 97.5% polyethylene resin,2.5% carbon black.our company use international advanced multiple layer co-extrusion blowing film process,the production process follow the ISO9001 quality control system,and the finished geomembrane has excellent property, especially chemical resistant,UV resistant,stress teat resistant and tensile strength.The peropety meet the ASTM standard, and passed the SGS TRI third party lab test.

what are the geomembrane properties?

Physical properties :the main items are thickness(smooth, textured), density, Melt flow index,

Mechnical properties:there are many items to determine the strength of geomembrane, like, tensile strength and elongation, tear resistance,impact resistance, CBR,UV resistance,stress cracking.

According to the ASTM GM Standard, hdpe geomembrane meet GM13, and lldpe geomembrane meet the GM17 standard, property requirement have the third party lab test report.

what are the applications of a geomembrane?

With the high property and suitable price, the geomembrane application is more and more,such as agriculture, fish pond, water dam, landfill,mining etc.

Agriculture:lagoons,irrigation ponds,canals,there are other applications as following:

Aquaculture,fish shrimp ponds

Greenhouse covers

Potable water ponds

Koi ponds

Waterscape and architectural ponds

Landfill

The landfill projects need a high technical property geomembrane to protect the groundwater and soil being contaminated.the  hdpe geomembrane is chemical resistant,so the hazardous waste landfill,sanitary landfill all use our geomembrane.

Mining Our hdpe geomembrane liner help the mining heap leach process, low cost budget and protect the environment.

River dams

River dam projects including many applications:

Brine ponds

Algae ponds

Cofferdams

Golf course pond

Lakes

Evaporation ponds for salt recovery

Containment

Secondary containment can prevent the waste from polluting soil and water.

Oil gas field containment

Mining containment

Drilling site pad liners

Heap leach pads

Disposal of mill tailings from mining operations

Lagoons and pits

Lagoons and pit liner is used to control wastewater seepage,for example

Animal waste containment

Biogas collection covers

Oil gas pits

what is the geomembrane manufacturing process?

We use the blown film process to produce the geomembrane liner. The blown film process follow the ISO9001 quality control system:

1. Polyethylene resin and carbon black resin are in different hoppers,then they are mixed from the raw material tanks at a designed percentage,then feed to a extruder barrel.

2. The resin is heated by electrical heating rod outside of the barrel. It is conveyed by the rotation of a specially designed screw.The molten stream is forced through a filter net, which to keeppurities.

3. The geomembrane extrudes from the circular die as a bubble, pulled vertically by a set of nip rollers located at the top of a cooling tower. The wind ring provide the cool wind to cooling the geomembrane liner temperature and ensure the bublle diameter.

4. the bubble goes through a collapsing frame and geomembrane is directed back toward the ground, Before being packed by the winder, the geomembrane bubble will be cut into the designed width.

Manufacturing process quality control

Following the ISO9001 quality control, from the raw material,we will do the inspection,although our raw material are from the world famous international factories,the resin will be inspected and tested,the material could be used when test is passed,otherwise the resin is rejected.

When the production start, the resin will be in the material tank, which are 100% clean to keep the purity.When the geomembrane bubble is made, the online thickness test equipment will do inspection continuously,if there is a hole, the production line will stop and have adjustment.After the bubble cut, the width will be recheck and then do the packing.

Each batch has samples test, based on the ASTM GM13 standard, especially the thickness, tensile strength, elongation, tear resistance, and CBR.The factory report then can be made when all the test is passed.

geomembrane thickness? 

 0.3mm/12mil/300mircons

0.5mm/20mils/500microns

0.75mm/30mils/750mircons

1mm/40mils/1000mircons

1.5mm/60mils/1500microns

2mm/80mils/2000microns 

The geomembrane thickness range is 0.3mm to 3mm, the thickness can be customized according to customer project design.

Here are popular thickness liner for reference:0.5mm 0.75mm 1mm 1.5mm and 2mm geomembrane.

The 0.5/0.75/1mm thickness geomembrane is popular for the fish pond shrimp pond, and water reservoir, irrigation, dam projects.

1mm geomembrane is also popular for the landfill capping.

1.5mm/2mm thickness geomembrane is popular for the landfill,water treatment, oil gas, and mining projects.

how much does geomembrane liner cost?

Geomembrane liner cost is according to the raw material, thickness mainly, the quantity, width, packing can also affect the geomembrane linercost.

Another factor is the transportation, if the project site is far, it will have more cost.

The last factor is the installation and project site conditions.the project site condition can add the cost of transportation, and geomembrane liner property like weight,flexibility and durability affect the installation cost.The hdpe geomembrane liner weight is not heavy, and much flexible,easy to operate, so the total cost is much cheaper.

Some people donot care the quality control cost for installation ,and the normal inspectiona and maintenance cost is not paied attention to.In different projects site, the maintenance cost maybe increase too much. For example, the temperature can affect the service life of the geomembrane liner.once the project have failures, the cost will be much huge.

 what is the difference between geotextile and geomembrane?

Water permeability

The geomembrane is impermeable to water, but geotextile materials are water-permeable.

material composition

Geomembrane is a kind of waterproof barrier material based on high polymerm,normally Polyethylene material.

Geotextiles, also known as geotextiles, are permeable geosynthetic materials made of synthetic fibers that are needled or woven.mateiral are polyester/pet or polypropylene/pp.In simple terms, geomembranes are impermeable and geotextiles are permeable.

Functional features

Geomembrane: small specific gravity, strong elongation, high deformation ability, corrosion resistance, low temperature resistance, good frost resistance.

Geotextile: high strength, corrosion resistance, good water permeability, good resistance to microorganisms, filtration and reverse filtration, slope protection, at the same time, combined with geomememm as a composite waterproof and impermeable material, can play a role of puncture prevention

Main applications

According to the impermeable characteristics of geomembrane, it can meet the impermeable requirements of railway, highway, sports hall, dam, hydraulic construction, tunnel, landfill, biogas pool and biogas pool, environmental protection and other projects.

 Combined with the permeability and filtration characteristics of geotextile, it is widely used in highway (including temporary road), railway, embankment, earth and rock dam, airport, sports field and other projects to strengthen the weak foundation.

And according to the needs of different projects, geomembrane and geotextile are combined. Geomembrane serves as the protective layer, cushion layer, drainage and exhaust layer and reinforcement layer of geomembrane, and geomembrane serves as the impermeable main body

 What is the surface of geomembrane.

Geomembrane could make double sides smooth, one side smooth and one side textured, double sides textured surface.

The textured surface is rough, it can add the friction between geomembrane liner and other products, like nonwoven geotextile.Because the textured surface geomembrane is not flat,the friction is high, geomembrane liner cannot slip at the slop, and the workers can stand there safely, it is antislip and stable.

The textured surface geomembrane is made of polyethylene material, first step is to make the smooth geomembrane liner, the basic smooth geomembrane can have a good property, then second step is to make the textured surface geomembrane,the polyethylene raw material is melt and spray on the smooth geomembrane liner. The textured geomembrane liner can be produced 8m width, and has a blank area at each side,20cm smooth area,which can be used to weld the geomembrane liners together.

What is the color of geomembrane.

 The normal color of geomembrane is black color, because the geomembrane have the carbon black raw material. The carbon black material add the UV resistance of the geomembrane, and can have a longer life when exposed to the  sunshine.

If the geomembrane donot have the carbon black material, the color is transparent, so other special colors can be done, for example, blue color, white color, green color, red color.

The color can be done at both sides, like double sides black color. we can also make one side black color, and another side white color, red color,green color or other colors.

 What is the size of geomembrane.

we can make 1m to 8m geomembrane liner, and the popular with of the geomembrane is 5.8m, 7m and 8m.

5.8m width is popular because it can be loaded in 20feet container, and the rolls are easy to do construction, especially for the small projects, like fish pond, shrimp pond, water reservoir, one or two people can handle the rolls.

7m or 8m are popular because these width can reduce the welding area of the geomembrane liner, especially for the landfill, mining, water treatment projects. The 7m or 8m width geomembrane can have less welding overlap area, reduce the risk of leak, and reduce the installation cost of people.

The geomembrane length is no problem, 50m 100m 140m 200m, the length can be customized according to the project design, and considering the loading ability in the container.If the length is too big, the container loading quantity is less, so the average cost is much higher.

What is the third party test of geomembrane.

With many years geomembrane production experience, our geomembrane meet the ASTM GM Standard, and our customer test the geomembrane in SGS, TRI,ACSIG third party labs, all the test report show our quality is excellent, property is higher than TRI GM standard.

also do the inspection at national construction lab, and the test result is very good too.

How long does HDPE liner last

The lifetime of geomembrane liner is an important question, but the answer is not easy and fast to get, based on whether the geomembrane is covered. The geomembrane is made of polyethylene raw material and carbon black master material.if the formulation is changed,the property is different accordingly, and the lifetime maybe different.

What items affect the life time of geomembrane?The answer is Ultraviolet, Oxidation,ozone,chemical, Biological,temperature and so on. In the ASTM GRI documents, there is a test about the lifetime of geomembrane,with two different condition, life time of covered geomembrane liner,and life time of exposed geomembrane.for the covered geomembrane in landfill projects,the life is predicted from 446years at 20℃,to 69years at 40℃.The Exposed geomembrane lifetime is not very clear,because the condition is not same all the time.But in the lab test, the exposed geomembrane lifetime is predicted to 36years and the test is ongoing.

If your project condition is harsh, for example, landfill, waste water treatment, mining tailing projects,the project can have a longer life with the ASTM standard geomembrane liner.