Yulin City landfill impermeable membrane

Impermeable membrane standard name is polyethylene geomembrane, mostly milky white translucent to opaque thermoplastic resin material - made of polyethylene resin. Polyethylene is a polymer, is non-toxic, tasteless, odorless white particles, the melting point of about 110 ℃ -130 ℃, relatively dense impermeable geomembrane equipment and production process of 0.918-0.965; impermeable membrane has good heat and cold. Good chemical stability, high rigidity and toughness, good mechanical strength, resistance to environmental stress cracking resistance, tear strength and good performance, as the density increases, the mechanical properties and barrier properties will be increased, heat, and tensile higher strength; acid, alkali, organic solvents, such as corrosion. Impermeable membrane is pe film as a substrate, and geotextile composite made of impermeable material, its performance depends on pe impermeable membrane. Pe membrane impermeable membrane applications Orient, mainly polyvinyl chloride and polyethylene, EVA (ethylene / vinyl acetate copolymer), which flexible material is a polymer chemistry, the proportion of small, strong extension, deformation capacity to adapt high corrosion resistance, low temperature, frost performance. The main mechanism of the non-permeable plastic film is cut off earth leakage passage, with its greater tensile strength and elongation to withstand water pressure and adapt to dam deformation; polyethylene virgin resin composition, the main component of 97.5% high density polyethylene, about 2.5% of carbon black, anti-aging agents, antioxidants, ultraviolet absorbers and stabilizer materials. Development of new synthetic geotextile impermeable membrane is waterproof deadening material rise eighties, following the soft PVC, chlorosulfonated polyethylene (CSPE) and butyl rubber, high child impermeable material embedded part of another new high-quality waterproof material. Application of impermeable membrane began in the mid-1980s, beginning with impermeable membrane in Canal seepage areas, followed by the emergence of HDPE impermeable membrane. Older people water seepage engineering Henan Victory Channel, Shaanxi people lead Weiqu, Beijing and Shanxi Dongbeiwang several irrigation area irrigated with good results after use, it later extended to the reservoirs, sluices and reservoirs and other projects. Earlier impermeable membrane thickness is thin, since the production process is not advanced and scientific backwardness limits the thickness of the impermeable membrane, impermeable membrane when people use the 0.12mm-0.38mm. Thick impermeable membrane to the early 1990s, China began to use it in. 1992, Guangxi Liuzhou Tamura dam is the highest in use of impermeable membrane, geomembrane rockfill dam, high 48m, has been used to date, its seepage better than expected even ideals. After 1998, the river closure of the Three Gorges Project is also used cofferdam impervious wall impermeable membrane. 1998 Fu Chau Han River Water Control Dike seepage control project uses 1.2 million square meters of impermeable membrane, impermeable membrane including HDPE, LDPE impermeable membrane, geomembrane and geomembrane. 21st century China, with the development of industry and science, China's production of impermeable membrane thickness of up to 3mm, width up to 8m, now a world leader. The current production bases in China impermeable membrane developed mainly in East China cities such as Beijing, Shanghai, Shandong and other cities. Impermeable membrane has been widely applied to various seepage control project, such as: artificial lakes, golf courses, landfills, tailings disposal stations, tunnels, high-speed non-skid, aquaculture, gardens and petrochemical industries. National Geotechnical Institute continues to develop new synthetic materials use impermeable membrane. Features 1, seepage coefficient - impermeable membrane has ordinary waterproof materials can not match the anti-seepage effect, HDPE impermeable membrane has a tensile mechanical properties, excellent flexibility and deformation capacity makes it ideal for expansion or contraction of the base surface, can effectively overcome the uneven settlement of the base surface, water vapor permeability coefficient 2, chemical stability - impermeable membrane has excellent chemical stability, widely used in sewage treatment, chemical reaction tanks, landfill. 80 kinds of acid and alkali chemical resistance, high temperature resistance, asphalt, oil and tar, acid, alkali, salt and other corrosive media 3, anti-aging properties - impermeable membrane has excellent anti-aging, anti-UV, anti-break capability, nudity Use of material life of 50--70 years, to provide good material to ensure 4, anti-plant roots -HDPE impermeable membrane has excellent resistance to puncture ability to resist most of the plant roots 5, high mechanical strength impervious to the environment - Anti osmosis membrane with good mechanical strength, tensile strength of 28MPa, elongation of 700% 6, low cost and high efficiency -HDPE impermeable membrane using new technology to improve the anti-seepage effect, but the production process more scientific, speed Jie, product cost so but lower than traditional waterproof material, the actual calculation using the general engineering HDPE impermeable membrane to cost savings of about 50% in July, the construction speed - impermeable membrane has a high flexibility, a variety of specifications laid forms to meet different projects seepage, using hot-melt welding, weld strength, construction convenient, rapid and healthy 8, environmentally friendly non-toxic - material impermeable membrane materials used are non-toxic and environmentally friendly materials, seepage is a common principle of physical changes, does not produce any harmful substances, is the best choice for environmental protection, farming, drinking water tank