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When talking about the role of plastic film in waterproof and thermal insulation, we should first think of impermeable earth film. This kind of geomembrane is famous for its excellent performance and can be used in many earth dam projects or canals. Maybe we will see non-woven fabrics in many cases. Geomembrane is basically a short fiber chemical material.
Geomembrane can be expanded to a certain extent and can be used in many places. After the geomembrane is combined with the plastic film, we say that the quality of the original plastic film can be effectively improved, and can also meet our more needs. This material is often referred to as geomembrane. When the material is added, the friction force of the contact surface can be increased, and the protective layer can form a more stable state.
Geomembrane is mainly a short fiber chemical material
In addition, the geomembrane can resist certain external chemical reaction mechanism and has good corrosion resistance. Even in strong acid environment, certain forms of geomembrane can be maintained for a long time. Generally speaking, geomembrane materials are very afraid of acidic, alkaline or salt environments. If you want to use mulch, it is best to place it in a place without direct sunlight.
Because it can prolong the service life of the geomembrane and avoid light stored materials, only in this way can the geomembrane avoid chemical reaction. Long time sunlight may increase the surface temperature of the geomembrane, so it will cause the structure of the geomembrane to crack. It may not seem that there is a big difference, but in fact, the nature of the geomembrane has changed.
With the development of economy, the application of geomembrane and geotextile is more and more extensive, mainly used in landscaping, sewage treatment plant, dam seepage prevention, subway project and other projects. What is the difference between geomembrane and geotextile when using geotextile? Let’s take a look.
That is, different characteristics:
1. Characteristics of geomembrane:
Geomembrane is a kind of anti-seepage material composed of plastic film and non-woven fabric. The anti-seepage performance of new material geomembrane mainly depends on the anti-seepage performance of plastic film.
1) It has excellent resistance to environmental stress cracking and chemical corrosion.
2) Large temperature range and long service life.
3) The anti-seepage and drainage system is set to act on the machine body and has the functions of isolation and reinforcement.
4) High composite strength, high peel strength and good puncture resistance.
5) Strong drainage capacity, large friction coefficient and small linear expansion coefficient.
2. Features of geotextile
Geotextiles, also known as geotextiles, are permeable geosynthetics made of man-made fibers, needles or braids. Geotextile is a new type of geosynthetics. The finished product is cloth, generally 4-6 meters wide and 50-100 meters long. Geotextiles are divided into geotextiles and non-woven geotextiles.
1) At present, synthetic fibers used in geotextile production mainly include polyamide fiber, polyester fiber, polypropylene fiber, polypropylene fiber, etc., all of which have strong burial and corrosion resistance.
2) Geotextile is a kind of permeable material with good filtering and isolation functions.
3) Nonwoven geotextile has good drainage performance due to its fluffy structure.
4) Geotextile has good puncture resistance, so it has good protection performance.
5) Geotextile has good friction coefficient and tensile strength, and has the performance of geotextile reinforcement.
2 Different water permeability:
Geomembrane is impermeable, while geotextile is permeable.
3 Different materials:
Geomembranes are plates of different thicknesses made of high molecular resin or rubber by heating extrusion or blow molding. They are impermeable membranes made of high and low density polyethylene, EVA, etc. Geotextiles are polyester, acrylic, etc. Non woven fabrics processed by spinning, card clothing or machine woven fabrics, non-woven fabrics or spinning, polyester, polypropylene, acrylic fiber, nylon, etc.
4、 Performance difference:
Geotextiles have good filtering, drainage, isolation, reinforcement, seepage prevention and protection functions, and are light in weight, high in tensile strength, good in air permeability, high in temperature and aging resistance.
Geomembrane is a polymer chemical flexible material with small specific gravity, strong ductility, strong deformation adaptability, corrosion resistance, low temperature resistance and good frost resistance.
Different purposes:
Geotextiles are mainly used for reinforcement, isolation, drainage, filtration and protection.
Geomembrane is mainly used for sealing, partition, seepage prevention and crack prevention.