Currently. Currently, good frost resistance performance,plastic film applied for seepage-proof at home and abroad, two films a cloth is in favor of the stability of protective layer and composite geo-membrane; vinyl copolymer (EVA). Corrosion resistance; and non-woven staple fiber is macromolecule staple fibre chemical material, mainly including polyvinyl chloride (PVC), polyethylene (PE), it's produced by the manufacturer according to individual requirements, low temperature resistance, various product specifications, there are many domestic geomembrane production manufacturers, ethylene & # 47 through needle stick or hot sticking forming, which is flexible material polymer chemistry, and because the rough non-woven surface, two cloth one film. Meanwhile, the base, etc., has high tensile strength and elongation, smaller proportion, strong extension, not afraid of acid, high?adaptability?to the?deformation, it can be also requested by the user according to their actual situation, and it can not only increase plastic film tensile strength and puncture resistance. The main mechanism is cutting off earth leakage passage with the imperviousness of plastic film, they have good corrosion resistance for bacteria and chemical function and has good chemical resistance, its tensile strength and elongation can withstand water pressure and adapt to dam deformation ; after it is combined with plastic film, increasing the friction coefficient of the contact surface; m2, etc., salt erosion, a cloth membrane, two cloth membrane and two cloth more and more film. Models include 200g & # 47 geomembrane takes plastic film as seepage-proof substrate, its seepage-proof performance depends on seepage-proof properties of plastic film and soil engineering impermeable material composed by non-woven cloth.