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Development of geomembrane


Since the 1950s, engineers have successfully designed with geomembranes. The use of geomembranes, also referred to as flexible membrane liners(FMLs), has increased as a result of growing concern over the contamination of valuable water resources. Traditional porous liners, such as concrete, admix materials, clays and soils have proven questionable in the prevention of fluid migration to subsurface soils and groundwater. Conversely, seepage through nonporous types of liners, namely geomembranes, has been nominal. In fact, when tested in the same manner as clay, fluid permeability through a synthetic geomembrane has been immeasurable. An installation’s functional requirements will determine the type of geomembrane. Geomembranes are available in a variety of physical, mechanical and chemical resistance properties designed to meet the requirements of a wide range of applications. The products can be compounded for exposure to ultraviolet light, ozone and micro-organisms in soil. Different combinations of these properties exist in various geosynthetic lining materials to cover a wide spectrum of geotechnical applications and designs. Several methods are used to join the geosynthetic lining materials in the factory and in the field. Each material has highly developed quality-control techniques that govern its manufacture and installation. New products and improved manufacturing and installation techniques continue to be developed as the industry improves its technology. Daelim, known as the leader among petrochemical companys in Korea with a couple of naptha crackers and related downstream resin plants, has an annual capacity of 7,200 ton of HDPE Geomembrane with thicknesses ranging from 1 to 2.5 mm and maximum width of 6.5 m. Daelim Geomembranes are produced by the flat-die extrusion method under strict quality control. Internal technical staff and R&D center have given Daelim the unique ability to provide the customers with various kind of technical data which are essential for sound design and installation of the geomembranes.