Geomembrane, geotextile and geomembrane belong to composite permeable material, mainly used for impermeable geomembrane, cloth membrane and two cloth membrane, width 4-6m weight 200-1500g / m2 tensile, tear-resistance, bursting and other physical and mechanical properties, it can meet the demands of water conservancy, municipal, construction, transportation, iron, tunnels and other civil engineering, due to its selection of high material and production process of chemical warfare agents added so non-regulated temperature environment to test the quality indicators per unit area (g / m2) 400 500 600 700 8009001000 Notes membranes degrees (mm) 0.25-0.35 0.3-0.5 breaking strength (kN / m) 5 7.5 10.0 12.0 14.0 16.0 18.0 CBR top crossbar to break strength (kN) 1.1 1.5 1.9 2.2 2.5 2.8 3.0 tear strength ( kN) 0.15 0.25 0.32 0.40 0.48 0.56 0.62