How are extrusion welds created in geomembrane applications?

Extrusion welds in geomembrane applications are created by pressing a hot bead of high-density polyethylene (HDPE) along the overlapping edges of the geomembrane materials. This method involves a specialized extrusion welding machine that heats the material to its melting point, allowing for a strong bond to form as the melted material cools and solidifies.

This process is crucial for ensuring waterproofing and structural integrity in various applications, such as landfills, ponds, and containment systems. The strength and durability of an extrusion weld are significant advantages, as they create a continuous, reliable seal that can withstand environmental stresses.

Other methods, such as stitching or mechanical fasteners, do not provide the same level of heat fusion and unite layers in a way that might compromise the waterproofing capabilities of the geomembrane. Similarly, adhesive bonding may not offer the same longevity and resilience under extreme conditions, making extrusion welding the preferred choice for optimal performance in geomembrane applications.