1. Definition and characteristics
As the name suggests, rough geomembrane has a certain degree of roughness on its surface to distinguish it from traditional smooth geomembranes. It is usually made of high molecular polymers (such as polyethylene) and is specially treated to form a rough texture on the surface to increase friction with soil or other materials, thereby enhancing the stability of the geomembrane. Rough geomembrane not only has good tensile strength, elongation and durability, but also has excellent anti-seepage performance.

2. Types and appearance
Rough geomembranes can be divided into many types according to the number and shape of rough surfaces, such as single rough geomembranes, double rough geomembranes and column point geomembranes. Its appearance is characterized by a rough surface and obvious uneven convex structure, which is in sharp contrast to smooth geomembranes.

3. Performance and Application
Rough geomembrane has many excellent properties, which makes it widely used in many engineering fields:

High friction and anti-skid performance: The rough texture on the surface of rough geomembrane increases the friction with soil or other materials, providing good anti-skid performance, especially suitable for projects requiring high friction and anti-skid performance, such as landfills, tailings ponds, slope anti-seepage projects.
Excellent anti-seepage performance: Rough geomembrane has an extremely low permeability coefficient, which can effectively prevent water penetration and ensure the stability and safety of the project.
Chemical stability: Rough geomembrane can withstand corrosion from a variety of strong acid and alkali chemical media, such as high temperature resistance, asphalt resistance, oil tar resistance, acid, alkali and salt resistance, etc., and is suitable for sewage treatment, chemical reaction pools and other projects.
Aging resistance: Rough geomembrane has good anti-aging, anti-ultraviolet and anti-decomposition capabilities, and the material has a long service life of up to 50-70 years.
Resistance to plant root penetration: Rough geomembrane can resist the penetration of most plant roots and is suitable for projects that need to prevent plant root damage.
The application areas of rough geomembrane include but are not limited to:

Roof waterproofing: as a waterproof material for building parts such as roofs and front balconies, it effectively prevents rainwater leakage.
Road, bridge and tunnel engineering: isolate water penetration between different layers and enhance the bearing capacity of the foundation.
Foundation engineering: isolate the wet base bed, prevent the instability of the base soil layer, and increase the bearing capacity of the foundation.
Water conservancy engineering: used for anti-seepage, reinforcement of river banks, dams and other projects to improve the stability and safety of the project.
IV. Forming process and price
The forming process of rough geomembrane mainly includes ginning roughening, spinning roughening, nitrogen roughening and chemical foaming roughening. These process methods have their own characteristics and are suitable for different production needs.

In terms of price, the price of rough geomembrane is affected by many factors, such as thickness, width, length, raw material cost, production process, etc. Generally speaking, the price of rough geomembrane is higher than that of smooth geomembrane of the same specification. For specific prices, please refer to market price information or consult relevant manufacturers.

5. Development Trends
With the advancement of science and technology and the continuous changes in engineering needs, rough geomembranes are also constantly innovating and developing. In the future, rough geomembranes will be more intelligent and automated, and through the integration of intelligent devices such as sensors and control systems, real-time monitoring and control of engineering status will be achieved to improve the safety and reliability of the project. At the same time, the material properties of rough geomembranes will also be continuously optimized and improved to meet more diversified engineering needs.