... Composite material made of two or more of geosynthetics. It is hydraulic conductivity of geotextile layer, impervious layer of polymer ... material by rolling or casting, hot melt coating formed.Product Structure: one-geotextile one- membrane type, ,one-geotextile two ... -membrane type ,two-geotextile one-membrane type,two-geotextile two-membrane type,several-geotextile ...