HDPE Geomembrane Anti-Seepage Film

Product Description

Geomembrane is a kind of polymer as the basic raw material of waterproof barrier type materials.

Mainly divided into: low density polyethylene (LDPE) geomembrane, high density polyethylene (HDPE) geomembrane and EVA geomembrane.

1. The width and thickness are complete in specifications.

2. It has excellent resistance to environmental stress cracking performance and excellent chemical corrosion resistance.

3. Excellent chemical corrosion resistance.

4. With the use of large temperature range and long service life.

5. Used in landfills, tailings storage field, canal seepage control, the dam seepage control and the subway engineering, etc. 

The main mechanism is a plastic film impervious partition earth dam leakage channels, with its larger tensile strength and elongation under pressure and adapt to the deformation of dam body; And non-woven fabric is a kind of high polymer chemical short fiber material, through needle stick or hot forming, has high tensile strength and extensibility, it combines with plastic film, not only increased the tensile strength and puncture resistance of plastic film, and because the non-woven fabric surface is rough, increasing the contact surface friction coefficient, is advantageous to the composite geomembrane, and the stability of the protective layer. At the same time, they have a good effect on bacteria and chemical erosion resistance, not afraid of acid, alkali, salt erosion, in use cases, long service life.

The process flow

Weeks head dam composite geomembrane impervious to dig, spread, while ram, while the extent of circulation operation.

The base surface cleaning

Base surface must be clean up according to design requirements, it is the key to ensure the seepage prevention effect, especially for rod, roots and other debris to clean thoroughly, base level there is no local bump phenomenon, clean up a good base to use rammer or ram plate ram tight, compact formation.

Composite laid

Membrane, must be laid from bottom to top. Between membrane and membrane and membrane between the base and to flatten against, but unfavorable pull membrane too tight, usually slightly loose a bit, but not with air bubbles in the bottom of a membrane. Shop because geomembrane is thin and light weight, good later, before lay good protective layer, vulnerable to the wind, so a membrane area should not be big, the best membrane while cover layer soil.

According to the manufacturer to provide material, composite geomembrane 1.0 ~ 1.9 m in length, the project selection of 1.9 m width, in order to reduce joint materials. Joint with hot glue, adhesive, methods of lap joint, the engineering design adopts adhesive, seam 50 mm wide.

If discover the geomembrane to Pierce or tear, must use three times the damage area of geomembrane good adhesive to contribute.

Protective casing

By geomembrane 10 cm thick protective layer of earth material must sieving, are not allowed to have a diameter greater than 6 mm above particles, otherwise easy to stab a groundbreaking film. Protective earth material must use rammer compacted, guarantee the dry density in 1.5 above, and sampling inspection at any time. Backfill layer and masonry, the stone surface protection must handle with, so as to avoid bumping ground membrane. Under the stone surface protection, should be spread to 100 mm thick gravel or gravel cushion layer, in order to prevent the water level change, wind and waves and scour the influence of such factors as soil layer. Dry block on the hanging line paving stone, stone should be closely build-in, individuals should be greater than 48 kg weight, surface stone all gaps are filled in with a small stone.

Peripheral processing

Around the junction processing requirement is to link closely, composite geomembrane and the surrounding soil block seepage entrance, truncation of lateral seepage path, prevent water penetration into the geomembrane underside, blisters, bilge groundbreaking work when the water level is falling film. So around the junction must dig cut sink, buried geomembrane and slot

The performance characteristics of HDPE geomembrane is as follows:

1, HDPE geomembrane is a kind of flexible waterproof material, has the very high seepage coefficient (1 x 10 to 17 cm/s);

2, HDPE geomembrane has good heat resistance and cold resistance, the use environment temperature of 110 ºC high temperature, low temperature to 70 ºC.

3, HDPE geomembrane has good chemical stability, corrosion resistant to acid, alkali, oil is a good anticorrosion materials;

4, HDPE geomembrane has the very high tensile strength, make it has the very high tensile strength can meet the high standards of engineering project needs; As shown in figure 1

5, HDPE geomembrane has strong weatherability, have very strong anti-aging performance, can be used long time exposed and keep the original performance;

6, the performance of HDPE geomembrane HDPE geomembrane has strong tensile strength and elongation at break, make HDPE geomembrane in a variety of bad geology and climate conditions of use. To adapt to the geological uneven settlement resilience;

7, HDPE geomembrane is made of high qualified native plastic and carbon black particles do not contain any preservatives, HDPE has been in China to replace PVC as raw materials for the food packaging bags and plastic wrap [1].