The company is a large comprehensive enterprise known domestic production of geosynthetics and import and export enterprises specialized in the production, research and development of geosynthetics and new composite materials. Mainly produces operating YN crack control paste, crack paste way geogrid way geogrid, fiberglass geogrid, warp knitting geogrid, steel plastic geogrid, mining geogrid 3D geonet mat, high strength geonet, geocell, engineering fiber, plastic blind ditch, soft water pipe, short wire geotextile, filament geotextile, geomembrane, composite geomembrane and other engineering materials. Its products are mainly used in the aerospace, aviation, military, chemical, oil; roads, railways, coal mining, water conservancy, electric power, water and soil conservation, and environmental greening and infrastructure areas, has been widely used in a number of national key projects such as highways, railways . Geomembrane using polyethylene virgin resin (high density polyethylene as the main component) to be a certain proportion of carbon black black masterbatch, antiaging agents, antioxidants, ultraviolet absorbers, stabilizers and the like, by a single, double, three layer co-extrusion technology blow molding. Impervious applications at home and abroad plastic films, polyvinyl chloride (PVC) and polyethylene (PE), EVA (ethylene / vinyl acetate copolymer), the tunnel applications designed to use ECB (ethylene-vinyl acetate modified asphalt of mix the geomembrane)'s. As plastic film impermeable substrate, and non-woven geotextile composite impermeable material, impervious performance depends on the performance of impervious plastic film. Geomembrane applications: used in railway, highway, sports hall, dams, hydraulic construction, reservoirs, canals, dams horizontal impervious laying, vertical seepage laying. Seawater, freshwater, water conservancy, chemical industry, construction, transportation, subways, tunnels, waste disposal sites, farms seepage tunnel, coastal beach, land reclamation, environmental protection and other projects. 1. Environmental protection, sanitation (such as solid waste landfill, sewage treatment plants, power plant regulation pool, industrial, hospital solid waste, etc.) 2. Water Resources (such as rivers, lakes and reservoirs dam seepage plugging, reinforcement, drains impervious the vertical core wall, slope protection, etc.) 3. Municipal projects (underground subway, building engineering, planted roof, roof garden impervious lining of sewers, etc.) 4. Garden (artificial lakes, rivers, reservoirs, golf course pond underlay, slope protection, green lawn waterproof moisture, etc.) 5. Petrochemical (chemical plants, oil refineries, gas stations, oil tank seepage, chemical reaction pool, the inner lining of the sedimentation tank, secondary lining, etc.) 6. Mining (washing pool, heap leaching pool, the ash-field, dissolving pool, settling ponds, yards, underlay of tailings seepage, etc.) 7. Transport facilities (road base reinforcement, culverts impervious) 8. Agriculture (reservoirs, drinking water pools, water storage pond, irrigation systems impervious) 9. Aquaculture (intensive, factory farming pools, fish ponds, shrimp ponds lined sea cucumber circle slope, etc.) 10. Salt (saltworks crystalline pool, halogen pool thatch cover, salt membrane, plastic thatch film Yanchi) in terms of performance, consider the following: 1.1 good physical and mechanical properties of composite geomembrane poor working conditions in many cases, is soaked in water or shop in a very humid soil, it must have a good hydrolysis resistance and mechanical properties of the wet. 1.2 resistant to ultraviolet radiation, hydrolysis resistant, resistant to high temperature composite geomembrane exposed to sunlight, and therefore has a corresponding UV resistance; a composite geomembrane to adapt to the temperature at the time of contact with the asphalt and other materials, requires high melting point. 1.3 chemical resistance, corrosion resistance, resistance to mildew water and soil are very different, some alkaline, some acidic, some salty, some containing a variety of elements, and therefore must have chemical stability. 1.4 good permeability of composite geomembrane filtration and drainage needs permeable, and therefore must have good permeability. Seams matters (1) composite geomembrane seams processing is a key program of construction, a direct impact on the operation of the project life, quality testing showed that the ideal heat welding method. (Also available dedicated adhesive) thermal welding method is PE geomembrane contacting surface heating treatment, so that melting of the surface, and then through the pressure of the fused into one, (2) geomembrane preferably laying along a certain direction, geomembrane both sides set aside to certain PE film and PET adhesive layer, each unit geomembrane toward laying to adjust, so that the two units geomembrane welding. (3) geomembrane laying, use sand bags to hold him down, to wind action, and the edge seams request can not be dirt, moisture, dust and other. (4) good seams two side PE single film to be adjusted prior to welding, lap broadband and flat, without wrinkles. Welding (5), it is best to have some experience of the technical staff welding, welding using special welding machine for welding. To adjust the temperature and speed (adhesive bonding). Control a civil grassroots surfaces laying of venue requirements: four degrees of flatness: ± 2cm/m2, flat straight; degree of compaction: 95% on it after rolling before laying geomembrane; 3 vertical, horizontal slope: longitudinal, transverse slope should be 2%, the boundary of the contour of the bottom of the landfill and the structure must be conducive to the leachate diversion; 4 Cleanliness: vertical depth of 2.50cm shall roots, rubble, gravel, concrete particles angular debris. Geomembrane characteristics: they are flexible material of a polymer chemistry, a smaller proportion of strong extended to adapt to high deformation capacity, corrosion resistance, low temperature resistance, frost resistance. The advantages of impermeable, durability, protective. Composite geomembrane FEATURES: 1, physical and mechanical indexes Height: tensile strength of more than 27MPa; elongation at break of 800%; perpendicular tear strength can reach 150N/mm more. 2, good chemical stability: HDPE impermeable membrane has excellent chemical stability, widely used in sewage treatment, chemical reaction pool landfill. High and low temperature resistant, corrosion resistant asphalt, oil and tar, acid, alkali, salt and other 80 kinds of strong acid and alkali chemical medium. The seepage coefficient: HDPE impermeable membrane impermeable effect with ordinary waterproof material unmatched, Department of Water vapor permeability K <= 1.0 * 10-13g.cm / c cm2.s.pa. 4, Construction: hot melt welding, weld strength is high, construction is convenient, fast. 5, chemical stability-HDPE impermeable membrane has excellent chemical stability, is widely used in sewage treatment, chemical reaction pool landfill. Resistant to high temperature, strong acid and alkali resistant asphalt, oil and tar, acid, alkali, salt and other 80 kinds of chemical corrosion, anti-aging performance-HDPE impermeable membrane has excellent anti-aging, anti-UV, anti-catabolic ability Exposed to use, the material life of 50-70 years, and provide good material for environmental impermeable 7, anti-plant root-HDPE impermeable membrane has excellent puncture resistance, resistance to most of the plant roots, high mechanical strength - HDPE impermeable membrane with good mechanical strength, tensile strength 28MP, elongation at break of 700% 9 cost-effective high-HDPE impermeable membrane using new technology to improve the anti-seepage effect, but the production process is more scientific and speedy, so the product but the cost is lower than traditional waterproof materials, actual calculations HDPE impermeable film general engineering to cost about 50% of the 10 high construction speed-HDPE impermeable membrane flexibility, there are a variety of laying in the form of a variety of specifications meet the requirements of different projects impermeable fusion welding high weld strength, construction is convenient, fast and healthy, environmental toxicity-HDPE impermeable membrane used materials are non-toxic and environmentally friendly materials, seepage principle is a common physical changes does not produce any harmful substances, environmental protection, farming, drinking water pool 12, the effect of welding-HDPE impermeable membrane very dedicated welding machine welding, weld strength greater than the strength of the base material, and as to facilitate the construction of composite geomembrane construction geotextile geomembrane layer of protection, so that the protective barrier layer from damage. To reduce the ultraviolet radiation, to increase the anti-aging properties, the best laying buried Law. Construction, the first to use material smaller diameter sand or clay leveling base surface, and then laying the geomembrane. Geomembrane not stretched too tightly, buried in the soil at both ends part is corrugated, and finally in the shop geomembrane shop with fine sand or clay layer about 10cm over-layer. 20-30cm of the puzzle on the stone (or concrete the prefabricated blocks) for the protective layer of the scour protection. Construction, every effort should be made to avoid the stones directly hit the geomembrane on the best side laying side protective layer construction. Composite geomembrane connection with the surrounding structures should be used layering anchor expansion bolts and steel plates, joints emulsified asphalt (2mm) thick adhesive brushing to prevent leakage there. The construction of a landfill seepage is the core of the whole project, seepage construction must be under the joint supervision of Party, design, supervision, done in close coordination of the civil party. 2 engineering materials used must meet the requirements. 3 civil works completed primary surface must meet the design requirements. The 4 materials during construction machinery equipment must meet the requirements. 5 construction workers must be skilled posts. The laying of geomembrane: 1, sweeping the geomembrane laying face requirements matrix formation, not uneven, etc., can not have sharp objects such as stones, wire, stick, spray herbicides for weed. 2, geomembrane best in a certain direction laying, do not pull too tight, you should leave some telescopic amount to accommodate the deformation of the matrix. Geomembrane both sides to set aside a certain width PE film and PET adhesive layer, each unit geomembrane toward laying to adjust, so that the two units geomembrane welding. , Geomembrane after laying, use sand bags to hold him down, to wind action, the laying of the Next geomembrane edge of welding geomembrane not pull too tightly at both ends buried in the soil part corrugated better especially with the anchoring of rigid material, should be left to the some telescoping amount. Construction should be avoided, stones, heavy objects directly hit the geomembrane on, the best side of construction, while laying the film, while covering the protective layer. The geomembrane thickness is thin, easily destroyed, laying a certain structure in order to effectively protect and enhance its stability on the slope, requirements. A protective layer: protective layer is in contact with the outside of the outermost layer, is to defend the outside flow or wave impact, weathering etching, freezing damage and shielding sunlight ultraviolet set. The layer of permeable rock fill, masonry or precast concrete panels, require a certain thickness. 2 on the cushion: transition layer between the protective layer and the under-lying geomembrane on the cushion, the protective layer is a large piece of rough material, if placed directly on the geomembrane, it is easy to destroy geomembrane, if the protective layer block mobile, more will hurt the membrane, and therefore must be done on a cushion. Permeable sand and gravel on the cushion can be used, the thickness should not be less than 10cm, depending on the circumstances, sometimes also can be used without sand concrete or asphalt mortar, etc.; impermeable material is a composite geomembrane, on both sides of the membrane a non-woven geotextile can play the role of the protective film, the need for a separate underlayer. Geomembrane: geomembrane impermeable main reliable impermeable, should also be able to withstand the stress caused during the construction of the stress and the use of structures settlement, it is also the strength requirements. Geomembrane strength of its thickness is directly related to, and determined by theoretical calculations or engineering experience. Single geomembrane surface is smooth, the friction coefficient is small shop to consider the possibility of decline in the slope. For this reason, the possible conditions generally require the use of composite geomembrane, non-woven geotextile surface soil friction coefficient much larger than single film; addition, there are local single film with lines to increase the roughness ; another focus from the laying of the way, for example, jagged, stepped laying, or berm station is located on the slope. Under the cushion: Shop under the cushion beneath the geomembrane has a dual function: First, to exclude the film under the stagnant water, free air, to ensure the stability of the membrane; protect geomembrane, it is not supported layer destruction. For the coarse rockfill dam, under the cushion can also be the role of the transition layer between the rockfill and geomembrane, this time under the cushion from the gravel, fine gravel and sand, among the particle size should be consistent certain interlayer relationships. If using a non-woven geotextile composite film, and for the compacted earth dam under the cushion generally can be omitted because of the non-woven geotextile can play a role of protection and drainage exhaust, and added with geomembrane friction. Under the cushion layer of geomembrane from the important role. If the geomembrane is placed directly on the crude pellets under water pressure, it would be pressed into the large pores of the coarse, and drawn broken. Conversely, if the next film for the formation of the hard layer of fine-grained soil material, the situation would be different. Previous studies have shown the 0.25mm thick polyethylene geomembrane Shop head acting even up to 200m, well-graded sand and gravel layer, geomembrane also no destruction, which indicates that the film under the cushion of the security of the state of film essential. 5. Layer support: the geomembrane is flexible material must be laid on the reliable support layer, it allows the geomembrane force uniform. In addition to the above-described lower cushion and support layer may also be used a well-graded compacted soil, the particle size should be selected depending on the film thickness. Some scholars have suggested that the maximum particle size of 0.2mm thick geomembrane layer should not be greater than 6mm, uniform coefficient should not be less than 20. If it is compacted embankment dam, dam planing, have a greater density can not specifically set up a support layer. Construction laying climate requirements: a temperature of 5-40 ℃ is appropriate, taking into account the thermal expansion and contraction of the geomembrane, based on experience, when it's cold, the laying of geomembrane should bear some; hot days should be slack; Note, however, noon when the high temperature should be avoided in the summer. 2 wind and rain: Wind over four or rain should stop construction; wind hours, suitably suppress geomembrane sand bags, to facilitate the construction