The key role of bonding process: technical support for the anti-seepage performance of composite geomembrane

1. The importance of bonding process
The bonding process is a technical means to firmly bond the anti-seepage membrane layer with the protective geotextile. Its role is not only to improve the physical strength of the composite material, but also to ensure the long-term and stable anti-seepage performance of the product during use. Since the composite geomembrane needs to work in an environment of high water pressure, acid and alkali corrosion and sharp substances, the quality of bonding directly affects the tensile strength, durability and overall structural stability of the material.

2. Application advantages of hot pressing composite process
The hot pressing composite process is an efficient way to bond the anti-seepage membrane layer with the protective geotextile using high temperature and pressure. This method occupies a dominant position in the manufacture of composite geomembrane and has the following significant advantages:

High bonding strength: Hot pressing composite can achieve molecular-level bonding, ensure that the bonding force between the anti-seepage membrane layer and the geotextile is greatly improved, and effectively avoid stratification.
Strong environmental protection: Compared with the use of chemical adhesives, hot pressing composite does not introduce additional chemical components, reducing potential pollution to the environment.
Wide adaptability: Hot pressing composite is suitable for anti-seepage membranes of different thicknesses (0.2mm to 0.8mm) and geotextiles of different densities (100g/㎡ to 800g/㎡), which can meet a variety of engineering needs.
In actual production, hot pressing composite requires precise control of temperature and pressure to ensure the uniformity and performance stability of the composite material.

3. Characteristics and application of adhesive sealing process
Adhesive sealing is a bonding method suitable for special scenarios, especially when low-temperature operation or rapid prototyping is required. The characteristics of this process include:

High efficiency and speed: The use of adhesives can complete bonding in a shorter time, greatly improving production efficiency.
Flexible operation: Suitable for the production of some temperature-sensitive or complex composite materials.
High reliability: By selecting environmentally friendly and high-strength adhesives, good bonding effects can be achieved to meet the anti-seepage needs of the project.

4. The actual impact of bonding process on the performance of composite geomembrane
High-quality bonding process can significantly improve the comprehensive performance of composite geomembrane, which is specifically manifested in the following aspects:

Enhancement of anti-seepage performance: The tight bonding interface effectively prevents the penetration of water, gas and other media, ensuring the long-term anti-seepage effect of composite geomembrane in water conservancy projects and landfills.
Improvement of tensile strength: The optimization of bonding process greatly improves the tensile strength of composite materials, especially under high water pressure or complex geological conditions to maintain structural stability.
Improvement of puncture resistance: The protective geotextile can further improve the puncture resistance of the membrane layer through good bonding and fixation, avoiding damage to the membrane layer caused by sharp substances.
Extension of service life: High-quality bonding process reduces the risk of delamination of materials in long-term use, thereby extending the service life of composite geomembrane.