HDPE geomembrane, also called impermeable membrane, which is mainly made of a thermoplastic resin material-polyethylene resin which is milky white translucent to opaque. Polyethylene is a high molecular polymer, non-toxic, odorless, odorless white particles, melting point of about 110 ° C -130 ° C, relative density of 0.918 -0.965; anti-seepage film has good heat resistance and cold resistance. Good chemical stability, high rigidity and toughness, good mechanical strength, good resistance to environmental stress cracking and tear strength. As the density increases, the mechanical properties and barrier properties will increase accordingly, heat resistance, and tensile strength. The strength is also higher; it can resist corrosion by acid, alkali, organic solvent and the like.