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1.Introduction
PP staple fiber needle punched non woven geotextile is a popular geosynthetic material,it is made by using an advanced needled nonwoven geotetxile fabric production line to cross-lay polypropylene fibers and then reinforce them with needling.The weight range is from 80g/m2 to 1000g/m2.This product has uniform thickness and good isolation effect, and is suitable for various geotechnical projects such as highways, railways, and tunnels…
2.PP Staple Fiber Non Woven Geotextile Features
*Polypropylene fibers have a low density of only 0.91g/cm ³(polyester is 1.38g/cm ³).Therefore,compared with polyester non woven geotextiles, polypropylene non woven geotextiles have a larger coverage area under the same strength
*The special structure of polypropylene fiber endows it with excellent acid and alkali resistance,especially superior alkali resistance to polyester fiber.When used in underground projects such as protection, reinforcement, waterproofing and anti-seepage in soil with strong acidity and alkalinity, its effect is better than that of polyester
*The surface friction coefficient of polypropylene fibers is relatively small, the friction force between fibers is small, and it has good wear resistance. Its seismic dynamic friction performance is much better than that of polyester
*Polypropylene fibers have excellent hydrophobicity and do not absorb water,making them superior to polyester fibers in drainage engineering applications
*High performance polypropylene non woven geotextiles have more fibers and higher strength than polyester non woven geotextiles of the same weight, and their strength in both longitudinal and transverse directions is almost the same
3.PP Staple Fiber Non Woven Geotextile Applications
*Transportation
High performance polypropylene nonwoven geotextiles have very wide applications in the transportation field, such as reinforcing,isolating and filtering the subgrade of highways and railways, sliding layers and isolation layers of high-speed railway ballastless tracks, reinforcing layers of airport aprons and runways, and reinforcing layers of seaport slope protection, etc. Transportation engineering is a major consumer of cement. At the parts that come into direct contact with numerous cement structures, high strength polypropylene non woven geotextile fabric has excellent alkali resistance, which can effectively ensure that its physical properties do not decrease due to the alkalinity of cement and play a long term role in the project
*Water conservancy
High performance polypropylene non woven geotextiles are suitable for any water conservancy project. They can be used alone to reinforce and protect reservoir DAMS, river, lake and sea embankments, etc., and can also be combined with geomembranes to form composite geomembranes for anti-seepage in water conservancy projects.However, in the project of reinforcing and preventing seepage in combination with cement, high performance polypropylene non woven geotextiles must be used. The alkalinity of cement can dissolve polyester non woven geotextiles within half a year,causing huge losses to the project and even leading to the loss of life and property
*Environmental protection
In environmental protection projects, many are under alkaline conditions and high performance polypropylene nonwoven geotextiles must be used. For instance, tailings DAMS and heap leaching sites for various metal beneficiations (such as gold, silver, copper, aluminum, magnesium, lead, zinc, etc.), landfill sites, special landfill sites, fly ash landfill sites, ash dam pools, heap leaching sites, red mud storage facilities, etc., are all in acidic or alkaline conditions
Keywords：
PET Non Woven Geotextile,PP Non Woven Geotextile ,Polyester Continuous Filament Non Woven Geotextile
What’s Steel Plastic Composite Geogrid?
Lianyi® Steel-plastic composite geogrid is made by specially treating high strength steel wires, combining them with polyethylene and adding other additives, and extruding them to form composite high-strength tensile strips,and the surface has a rough texture, it is called a high strength reinforced geogrid. This single band is woven or interlaced at certain intervals in the longitudinal and transverse directions and welded by ultrasonic waves. Due to the product surface being rolled into regular patterns, when laid in the replacement fill soil layer, it bears huge stress resistance and friction with the fill soil. As a whole, it limits the shearing, side extrusion and uplift of the foundation soil. Because the stiffness of the reinforced soil cushion layer is relatively large, it is conducive to the diffusion and more uniform transmission of the upper foundation load to the lower soft soil layer, effectively improving the bearing capacity of the foundation Due to the effect of the reinforced soil cushion layer, the overall stiffness of the foundation within the compression layer range is increased, which is conducive to adjusting the deformation of the foundation. The reinforced soil composite cushion layer formed by using steel plastic composite geogrid is a flexible structure that can absorb the energy of earthquakes very well, so its seismic performance is good.
Steel Plastic Composite Geogrid Features
*It has high strength and low creep,and is suitable for various soil environments.It can be used in tall retaining walls along highways
*It has stable performance,can enhance the interlocking and biting effect of the reinforced bearing surface,strengthen the bearing capacity of the foundation, restrain the lateral displacement of the soil, and increase the stability of the foundation
*It is not easy to be damaged.After the packing is compacted,it is not eroded by ultraviolet light and oxygen,and can meet the requirements of engineering construction
*Corrosion-resistant and long-lasting,steel plastic composite geogrids use plastic materials as the protective layer and are supplemented with various additives to endow them with anti-aging and anti-oxidation properties, and can withstand the corrosion of harsh environments such as acids, alkalis, and salts. Therefore,steel plastic composite geogrids can meet the usage requirements of various permanent projects for over 100 years,and they have excellent performance and good dimensional stability
*The construction is convenient, the cycle is short,and the cost is low.The laying, lapping and positioning of steel plastic composite geogrids are easy, avoiding overlapping and crossing,which can effectively shorten the project cycle and save 10% to 50% of the project cost
*All types support customization.We can customize suitable products according to your needs
Steel Plastic Composite Geogrid Applications
It can be applied to the reinforcement of soft soil foundations,retaining walls and anti-cracking projects of road surfaces in fields such as highways, railways, embankments, abutments, approach roads, docks,revetments,flood control embankments, DAMS, waste dumps, freight yards, airports, sports fields and environmental protection buildings.
Keywords：
PET Welded Geogrid
HDPE GeomembraneConstruction precautions
*The soil should be solid to avoid uneven settlement and cracks. The turf and tree roots within the anti-seepage range should be removed. A protective layer of fine grained sand or clay is laid on the surface in contact with the membrane
*When laying the geomembrane,do not pull it too tightly.It is better for the parts buried in the soil at both ends to be in a wavy shape. Especially when anchoring with rigid materials, a certain amount of expansion and contraction should be left
*During construction,it is necessary to avoid direct impact of stones and heavy objects on the geomembrane.It is best to lay the membrane and cover the protective layer simultaneously during construction
*Construction workers should wear flat cloth shoes or soft rubber shoes. It is strictly forbidden to wear spiked shoes to avoid damaging the geomembrane. If any damage to the geomembrane is found during construction, it should be repaired in time
Seam
1.The laying of geomembrane
*The surface of the geomembrane should be cleaned and laid as a whole, without any unevenness or concavity.There should be no sharp objects such as stones, iron wires or wooden sticks. Herbicides should be sprayed to kill weeds
*Geomembrane is best laid in a certain direction and should not be stretched too tightly. There should be a certain margin to accommodate the overall deformation
*A certain width of PE film and PE film adhesive layer should be reserved on both sides of the geomembrane. When laying, the direction of each unit of geomembrane should be adjusted properly to facilitate the welding of two units of geomembrane
*After the geomembrane is laid, it should be pressed down with sand belts to prevent wind movement, which may affect the welding of the edge of the geomembrane in the next step, and the cushion layer should be covered in time
2. Welding of geomembrane
*For the laid geomembrane, there should be no dirt, moisture, dust, etc. at the edge seams
*Before welding, adjust the two edges of the PE single film at the joint to overlap to a certain width, and make it flat without wrinkles
*During welding, technicians are responsible for the welding or technical guidance, and professional double-track automatic crawling welding machines are used for the welding
*When welding, control the pressure, temperature and forward speed of the heat sealing machine well to ensure the welding quality
*After welding is completed, timely inspection should be carried out to ensure the integrity of the weld seam. Welding should be done immediately after laying, which increases the difficulty of cleaning over time.
Keywords：
Geomembrane
Lianyi® HDPE Geomembrane is a new type of geosynthetic material,It is made of high-quality virgin polyethylene resin, with the main component being 98% high-density polyethylene, approximately 2% carbon black, anti-aging agents, antioxidants, ultraviolet absorbers, stabilizers and other auxiliary materials. It is produced by the most advanced fully automatic production equipment in the world through three-layer co-extrusion technology. All products are manufactured in accordance with GM13 standards and ASTM testing standards. They come in a complete range of specifications, with smooth surface thickness ranging from 0.2mm to 3.0mm and width from 2 to 8m, meeting the application requirements of water conservancy, construction, municipal engineering, gardens, landscapes, petrochemicals, mining, agriculture, aquaculture and other industries.
*High anti-seepage coefficient
HDPE geomembrane has an anti-seepage effect that is unmatched by ordinary waterproof materials. The water vapor permeability system is k≤1.0*10-13g.cm/cm2.s.pa
*Chemical stability
HDPE geomembrane has excellent chemical stability and is widely used in sewage treatment, chemical reaction tanks and landfill sites. It is resistant to high and low temperatures, asphalt, oil, tar, and over 80 kinds of strong acid and strong alkali chemical media such as acids, alkalis and salts
*Aging resistance
HDPE geomembrane has excellent anti-aging, anti-ultraviolet and anti-decomposition capabilities. It can be used exposed and has a service life of up to 50 to 70 years, providing a good material guarantee for environmental anti-seepage
*Resistant to plant roots
HDPE geomembrane has excellent puncture resistance and can resist the roots of most plants
*High mechanical strength
HDPE geomembrane has excellent mechanical strength, superior elasticity and deformation capacity, making it highly suitable for expanding or contracting base surfaces. It can effectively overcome uneven settlement of the base surface. The tensile strength at break is 28 mpa, and the elongation at break is 700%
*Good economic efficiency
HDPE geomembrane has enhanced its anti-seepage effect by adopting new technologies. However, its production process is more scientific and rapid, and the product cost is lower than that of traditional waterproof materials. According to actual measurements, projects using HDPE geomembrane can save about 50% of the cost
*Fast construction speed
HDPE geomembrane has high flexibility and is available in various specifications and laying methods to meet the anti-seepage requirements of different projects. It is welded by hot melt, featuring high welding strength, convenient and fast construction
*Environmentally friendly and non-toxic
The materials used in HDPE geomembrane are all non-toxic and environmentally friendly. The anti-seepage principle is a common physical change, which does not produce any harmful substances. It is the best choice for environmental protection, aquaculture and drinking water pools
Applications Of HDPE Geomembrane
*Environmental protection and sanitation (such as domestic waste landfills, sewage treatment plants, power plant regulating tanks, industrial and hospital solid waste, etc.)
*Water conservancy (such as anti-seepage, leakage plugging, reinforcement of river, lake and reservoir DAMS, anti-seepage of water channels, vertical core walls, slope protection, etc.)
*Municipal engineering (subways, underground works of buildings, green roofs, anti-seepage of roof gardens, inner linings of sewage pipes, etc.)
*Gardens (artificial lakes, rivers, reservoirs, bottom linings of ponds for golf courses, slope protection, waterproofing and moisture-proofing of green lawns, etc.)
*Petrochemical (Anti-seepage of storage tanks in chemical plants, oil refineries, gas stations, inner linings of chemical reaction tanks, sedimentation tanks, etc.)
*Mining (washing and selection tanks, heap leaching fields, ash storage fields, dissolution tanks, sedimentation tanks, storage fields, bottom lining and anti-seepage of tailings, etc.)
*Transportation facilities (foundation reinforcement of highways, subways, anti-seepage of culverts)
*Agriculture (Channels, diversion channels, reservoirs, drinking water pools, storage ponds, anti-seepage of irrigation systems)
*Aquaculture industry (intensive, factory-scale aquaculture ponds, fish ponds, shrimp ponds lining, sea cucumber circle slope protection, etc.)
*Salt industry (salt field crystallization pool, salt film, salt pool plastic film)
Keywords：
Geomembrane
1.Introduction
Geotextile,also known as geotextile fabric, is a permeable geosynthetic material that exists between soil and pipes,gabions,or retaining walls,enhancing water movement and hindering soil movement.
Continuous filament non woven geotextile is made from super strength polyester chips as raw materials, and is produced through spinning,air stretch,web laying,pre-pressing and needling punched.
2.Polyester Filament Geotextile Manufacturing Process
The series of needle punched non woven geotextile products are formed through fine carding,multiple precise needle punching or appropriate hot rolling treatment.Long-fiber needle punched non woven geotextile is made by stretching the fibers through jet drawing,laying them into a fiber web,and then pre-pressing the fiber web through an overheated roller and reinforcing it with needling to form a fabric.The needling needles have hooking needles, repeatedly needling the fiber web,hooking and reinforcing the fibers to form needle punched non woven geotextile.
3.Polyester Filament Geotextile Features
*It has stable physical properties and can maintain its original performance for a long time
*It has stable chemical properties and strong resistance to acids and alkalis
*Good water permeability
*It can withstand high temperatures, freeze and adapt to different external environments
*It is light in weight, can be packaged, transported and stored as required, and is convenient for construction
4.Polyester Filament Geotextile Applications
*Isolation: Geotextiles are used to isolate building materials with different physical properties,preventing the loss and mixing of two or more materials, maintaining the overall structure and function of the materials, and increasing the load-bearing capacity of the materials
*Drainage: Geotextiles are excellent water-conducting materials.They can form drainage channels within soil structures,expelling excess liquids and gases from within the soil structures
*Filtration: When water flows from fine-grained soil layers into coarse-grained soil layers, the excellent air permeability and water permeability of needle punched geotextiles are utilized to allow water to pass through and effectively intercept particles, fine sand, small stones etc., thereby maintaining the stability of water and soil engineering
*Protection: Effectively diffuse, transfer or decompose concentrated stress to prevent soil from being damaged by external forces
*Sealing: Geotextiles, in combination with other materials, form impermeable layers in the soil layer
*Reinforcement: Utilizing geotextiles to enhance the tensile strength and anti-deformation capacity of soil, improve the stability of building structures, and enhance the quality of soil
*Other: Long fiber non woven geotextiles can be combined with other geosynthetic materials such as geogrids, geomembranes, and drainage nets to form composite geosynthetics
Keywords：
PET Non Woven Geotextile
1.Introduction
Polypropylene continuous filament non woven geotextile is made from special polypropylene raw materials.It is formed into continuous polypropylene filaments through spinning and stretching, followed by continuous web laying, multiple needling and consolidation, and then expansion and shaping, and finally hot-rolled into a non woven geotextile fabric.
2.Polypropylene Filament Geotextile Features
*Low density: At room temperature, its density is only 0.91g/cm ² (1.38g/cm ² for polyester), making it the lightest material among synthetic fibers
*High mechanical properties: Under the same grammage,polypropylene continuous filament fabric has high tensile strength,high puncture resistance and stable structure
*Good chemical stability: It has excellent acid and alkali resistance
*Good water permeability and drainage performance: Polypropylene material has good hydrophobicity, does not absorb water, does not hydrolyze,and water can easily penetrate through
*Low-temperature resistance: The performance of polypropylene non woven geotextile is almost unaffected at low temperatures
3.Polypropylene Filament Geotextile Advantages
*The chemical properties of polypropylene continuous filament non woven geotextile are extremely stable.Except for concentrated sulfuric acid and concentrated nitric acid, it hardly reacts with other reagents and can be used in an environment with a PH value ranging from 2 to 13 without being affected. Polypropylene continuous filament non woven geotextile can maintain almost 100% of its strength after being soaked in calcium hydroxide solution at 60℃ for three days
*Under the condition of the same gram weight, the lower the density, the greater the number of fibers per unit area, and the thickness of the formed product is also larger than that of other material needle punched geotextiles, and various strength indicators are also higher. Under the same gram weight conditions, polypropylene filament non-woven geotextile has high tensile strength, high puncture resistance and stable structure
*Under the irradiation of 340nm ultraviolet lamps and spraying (for 350 hours), the strength retention rate of 350g of polypropylene continuous filament non woven geotextile with anti-ultraviolet masterbatch added reached over 95%, and some indicators were even better than before irradiation
4.Polypropylene Filament Geotextile Applications
*Sliding layers and isolation layers of high-speed railway ballastless track
*Airport runway isolation layer
*Highway waterproof and crack-proof base fabric
*Anti-seepage cushion layer for subways and tunnels
*Bank protection and bottom protection for water conservancy projects
*Anti-seepage and site closure for solid waste/tailings/landfill sites
*Wrap the blind ditches with crushed stones for isolation and filtration
*Slope protection/isolation and water filtration behind retaining walls
Keywords：
PET Non Woven Geotextile