In modern society, some ornamental fish ponds and artificial lakes are very common, and there is a material that is indispensable when building them, that is, geomembrane, because it has a very good impermeable effectLet's take a look.
The production and manufacturing process steps of geomembrane are divided into two types: one is calendered film, and the other is blown film process.
Because the production and manufacturing process of geomembranes is different, the geomembranes manufactured have their own advantages and disadvantages: it is better to choose rough or lightI believe that many people are not clear, some say that it is good and some say that it is good, and it is difficult to unify the caliber of different opinions, so I will explain it to you from a professional point of view today.
First of all, from the appearance, rough ** and light ** are literally very easy to distinguish, rough ** and corrugated rough surface and stationary rough surface and other purposes are to increase friction, light ** is the mirror form, so which one to choose from the following points to explain to you.
When purchasing geomembrane for tailings, the site topography is first considered, many sites will be extremely complex in the deep mountains and cols, and the difficulty of construction is relatively increased.
From the cost point of view, it is best to choose a smooth geomembrane, because the cost of light is lower than that of rough geomembrane, and the rough cost of the same specification is higher than that of the light unit, and the cost of the order of magnitude is relatively increased a lot, so it is more appropriate to choose light from the perspective of cost.
1. Calendered geomembrane production and manufacturing process
Calendered film, also known as lamination, is a plastic film produced by horizontal extrusion of high-pressure polyethylene raw materials by hot melting.
The advantage of the geomembrane of the calendering process is that the surface layer is brighter, like a bathroom mirror, and it is more cost-effective than the blow molding process filmDefects: uneven thickness;The compressive strength of impurities is not high and brittle.
2. Production and manufacturing process of blown film:
Blow molding, also known as blown film, refers to the heating and melting of high-density polyethylene particles according to the air-cooled Lashen coating film. Injection molding processing technology that blows into plastic film.
The advantages of the geomembrane products manufactured by the blow molding process are stable quality, uniform thickness and thickness, high vertical and horizontal tensile strength, and long service life. The defect is due to the application of special profiles that can be blown molding, so the price is higher than that of calendered geomembrane.
The production process of geomembrane calendering, blow molding and casting is briefly described as follows
1. Comparison of production processes:
The production process of HDPE geomembrane is divided into the casting method of the laminating machine and the three-layer co-extrusion blow molding method of the blown film, and the so-called flat extrusion is the coating casting process.
2. Quality comparison:
HDPE geomembrane urban construction standards need to be processed by blown film method, while non-standard standards of national standards and below are often produced by laminating process, such as urban construction HDPE geomembrane used in landfills is made by blown film process.
3. Contrast:
The geotechnical impermeable membrane of the blown film process far exceeds the coating in various indicators under the same raw materials, but it is also slightly higher than the coating.
The above is today's content, thank you for reading and**, if you don't understand anything, welcome to consult our geomembrane experts.