Why is carbon black added to geomembranes?

Geomembranes are critical barriers in construction, waste management, and environmental protection, preventing pollution and maintaining site stability. Carbon black, as a core additive in geomembranes (particularly polymer-based geomembranes such as high-density polyethylene (HDPE) and low-density polyethylene (LDPE)), goes beyond simply filling the gaps. It enhances the performance of geomembranes in multiple ways, including anti-aging, environmental resistance, and mechanical reinforcement, ultimately extending the project's service life and reducing maintenance costs.

Geomembranes are often used in open-air projects (such as landfills, artificial lakes, water conservancy dams, and tailings ponds). Long-term exposure to sunlight can lead to embrittlement and reduced impermeability due to UV rays, ultimately rendering them useless. Carbon black, on the other hand, primarily blocks sunlight (UV rays) from breaking down plastics, allowing them to withstand extreme temperatures and heat, and enhancing their strength.

Therefore, adding carbon black to geomembranes can solve the key problems of geomembranes such as "short life", "easy to damage" and "unsafe" in outdoor, complex media and extreme environments through its five core advantages of anti-aging, corrosion resistance, strong mechanics, anti-static and temperature resistance, and ultimately ensure the long-term stability and safety of geomembrane anti-seepage and isolation projects.