What are the geomembrane manufacturing processes

Geomembrane, also known as mulch or geosynthetics, is a material used for soil seepage prevention, anti-leakage and soil protection.

What are the geomembrane manufacturing processes

Material preparation: Select the appropriate geomembrane material, usually high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE) or polypropylene (PP). For large projects, the material may need to be pre-fabricated to size in sheets or coils.

Geomembrane laying: According to the design requirements, lay the geomembrane on the soil surface that needs anti-seepage or protection. Usually laid in rolls, the geomembranes can be joined together by welding or overlapping.


Join welding: If multiple geomembrane membranes need to be joined together, the common method is heat welding. Using a heat welder or heat gun, heat and press the edges of the geomembrane together to create a strong connection.

Edge fixing: In order to ensure the stability of the geomembrane, it is usually necessary to fix the edge. The geomembrane can be secured with nails, clamps or weights etc. to prevent it from being moved or damaged during use.

Inspection and maintenance: After the laying of the geomembrane is completed, the laid geomembrane should be inspected to ensure that it is intact and free of defects. Carry out regular maintenance work, such as cleaning surface debris, checking the tightness of connection parts, etc.

It should be noted that the geomembrane manufacturing process may vary depending on the specific application field and requirements. For complex or large geotechnical projects, more specialized construction methods and equipment may be required. In addition, in actual operation, it is necessary to adjust and respond flexibly according to the site conditions and design requirements. Therefore, in the process of geomembrane production, it is best to consult a professional geotechnical engineer or construction team to ensure the correctness of the process and construction quality.


Geomembrane blow molding is a common method in the geomembrane manufacturing process, which uses a blow molding machine to blow molten plastic blanks through a mold into a film shape.

What is the geomembrane blow molding process

Material preparation: Select suitable geomembrane materials, such as high-density polyethylene (HDPE) or linear low-density polyethylene (LLDPE). These materials are usually supplied in pellet or powder form and need to be melted in a blow molding machine.

Melting and extrusion: The geomembrane material is added to the feeding port of the blow molding machine, and the material becomes molten through the process of heating and melting. A screw is then used to propel the molten plastic preform from the heated zone into the die section of the extruder.

Mold blow molding: In the mold section of the blow molding machine, the molten plastic preform is blown into a film by the airflow or air pressure in the mold. The shape and size of the mold determine the shape and thickness of the final geomembrane.

Cooling and shaping: The blown geomembrane is cooled by a cooling device to make it solidify and solidify quickly. During cooling, treatments such as stretching and leveling may also be performed to obtain better physical properties and flatness.

Inspection and packaging: The finished geomembrane will be inspected to check whether its physical properties, thickness and quality meet the requirements. Qualified film rolls are cut into standard size segments and packaged for storage, shipping and use.

The advantages of geomembrane blow molding process include high production efficiency, strong manufacturing flexibility, and relatively low cost. It can be widely used in civil engineering, water conservancy engineering, environmental engineering and other fields for soil seepage prevention, soil protection, isolation layer and other applications. However, in order to ensure the quality and performance of the geomembrane, for projects with special requirements, further processing and testing may be required, such as adding reinforcement materials or surface treatment, etc.

About Us

Tinhy has four manufacturing facilities, covering an area of 100,000 square meters. We currently have 5 geomembranes (3 flat-die, 2 blown), 3 non-woven geotextiles (2 short-fiber, 1 continuous-filament), 3 MDS® drainage boards (up to 6 meters wide), 3 geocomposites (with geonets, GCL, and composite geomembranes), double-locking edges GCL, geonets, geogrids, and water-stop belt production lines.

With the varieties of products and professional installation team, Tinhy always puts the integrity of the projects first by providing superior products and cost-effective solutions.

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  • Tinhy

    Founded in 2002, Tinhy's team focuses on the manufacturing, marketing, installation, application and research and development of geosynthetic materials.

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