长丝复合土工膜 Filament composite geomembrane

土工膜以塑料薄膜作为防渗基材，与长丝无纺布复合而成的土工防渗材料，新材料土工膜它的防渗性能主要取决于塑料薄膜的防渗性能。目前，各地及国外防渗应用的塑料薄膜，主要有聚氯乙烯（PVC）和聚乙烯（PE）、EVA（乙烯/醋酸乙烯共聚物），隧道应用中还有设计使用ECB（乙烯乙酸乙烯改性沥青共混土工膜）的，它们是一种高分子化学柔性材料，比重小，延伸性强，适应变形能力高，耐腐蚀，耐低温，抗冻性能好。长丝复合土工膜又是该防渗材料的佼佼者。

Geomembrane is a geotechnical anti-seepage material composed of plastic film as the anti-seepage substrate and filament non-woven fabric. The anti-seepage performance of the new material geomembrane mainly depends on the anti-seepage performance of the plastic film. At present, plastic films used for anti-seepage in various regions and abroad mainly include polyvinyl chloride (PVC), polyethylene (PE), and EVA (ethylene/vinyl acetate copolymer). In tunnel applications, ECB (ethylene acetate ethylene modified asphalt blend geomembrane) is also designed to be used. They are a polymer chemical flexible material with small specific gravity, strong extensibility, high adaptability to deformation, corrosion resistance, low temperature resistance, and good frost resistance. The filament composite geomembrane is also an outstanding anti-seepage material.