Geomembrane is a high molecular polyethylene plastic film, which is a high molecular polymer material. Because of its own density and negative permeability coefficient, it has good anti-seepage properties. The production process of geomembrane is divided into two kinds, one is processed by extrusion coating machine casting method and calendering process; the other is processed by three-layer co-extrusion method, and the film is blown to high altitude and cooled. There is an obvious difference between the two. For projects with strict requirements, an impermeable membrane by blown film method is required, while for general projects, an anti-seepage membrane made of lamination can be used, depending on the situation.
How to repair the broken geomembrane used for fish farming pond? How to do pond liner leak repair?
Some cients may asked that there were more than a dozen holes in HDPE geomembrane in the fish pond, and then the water kept leaking. The water in the fish pond could not maintain a depth of 2 meters, and it soon disappeared. So how do we repair it? At this time, we need to consider 3 ways to fill the hole: one is to use special adhesive for geomembrane, that is, KS hot melt adhesive; the other is to use double-sided tape, that is, 5 cm wide tape or 8 cm tape to stick repair the leak; in addition, you can also use extrusion welder to repair the hole.
If the depth is deeper than 2 meters, the water pressure is too high, we need to use an extrusion welding gun to weld, first take a geomembrane with a diameter larger than 5 cm of the hole, then heat the surrounding of the hole and this piece of membrane, and then put the piece of film Adhere to the hole until cool. Of course, stickers can also be used for bonding, which can be operated when conditions permit.
Is the seam of HDPE fish pond liner glued or welded?
The specification of normal HDPE geomembrane is 6 X 50 meters. During the construction of the HDPE fish pond liner, if the width of the fish pond is too wide, there will be an overlap between the geomembranas. It should be noted here that the overlap is not less than 10 cm, so how to deal with the overlap? ? Under normal circumstances, we will consider using special adhesive for impermeable film and welding with double-track hot-melt welding machine. This special glue is also called KS hot melt glue. What are you most concerned about? Cost! Therefore, in terms of cost, if the area of the fish pond is from a few hundred square meters to 2000-3000 square meters, it is recommended to use glue for bonding, because the KS hot melt adhesive itself is solid, so it needs to be boiled into a liquid in an iron pot.
Note: The temperature should not be too high, too high will burn the impermeable membrane.
If the area is more than 5,000 square meters or even tens of thousands of square meters, it needs to be welded by geomembrane welding machine. The thickness of the normal fish pond impermeable membrane is within 1.0 mm, so it can be welded with a small hot-melt welding machine.
The price of a small welding machine is about 3,500 yuan (555USD).
If the thickness is greater than 1.0 mm, then a large welding machine is required. Its price is slightly higher, about 7,000 yuan (1110 USD).
With the rapid development of the economy and the higher and higher living standards, people's demand for seafood and fish is increasing, and more and more fish ponds are gradually derived. As the anti-seepage main body of modern fish ponds, geomembrane has the advantages of low cost, simple construction and short construction period compared with traditional reinforced concrete structures. At the same time, the anti-seepage effect is better, which can save 50% of the cost budget. More and more fishermen friends It is accepted and recognized that in the near future, HDPE geomembrane will completely replace the traditional anti-seepage main body of fish ponds and become an important "member" of fish pond anti-seepage.