Geotextile (polyester geotextile, non-woven geotextile), also known as geotextile fabric, is a new type of construction material. Its fibers are composed of high polymer polymers such as polyester, polypropylene, acrylic, and nylon. It is a permeable geotextile material made by needle-punching or weaving the composite fibers. The product is in the form of fabric, generally 4-6 meters in width and 50-100 meters in length. Geotextiles are divided into woven and non-woven types. They have excellent filtration, separation, reinforcement, and protective effects, with high tensile strength, good permeability, resistance to high temperatures, frost resistance, aging resistance, and corrosion resistance.
Function of geotextiles: Using polyester staple fiber needle-punched geotextiles can separate construction materials with different physical properties (such as particle size, distribution, consistency, and density) like soil and sand, or soil and concrete. This prevents mixing, maintains the overall structure and function of the materials, and strengthens the load-bearing capacity of structures.
When water flows from fine-grained soil layers to coarse-grained soil layers, the excellent air and water permeability of polyester staple fiber needle-punched geotextile allows water to pass through while effectively retaining soil particles such as fine sand and small stones, ensuring the stability of soil and water engineering. These geotextiles also have excellent drainage functions, creating channels inside the soil to discharge remaining liquids and gases.
Using polyester staple fiber needle-punched geotextiles enhances the tensile strength and deformation resistance of soil, improving structural stability and soil quality. They disperse, transmit, or divide concentrated stress when water flows over soil, preventing soil damage from external forces and protecting the soil.
When combined with geomembranes, they form a composite waterproof and anti-seepage material that provides puncture resistance. They feature high tensile strength, good permeability, breathability, resistance to high temperatures, frost resistance, aging resistance, corrosion resistance, and insect resistance. Polyester staple fiber needle-punched geotextiles are widely used geotextile materials, commonly applied in railway subgrade reinforcement, highway pavement maintenance, sports stadiums, dyke protection, hydraulic engineering separation, tunnels, coastal tidal flats, land reclamation, and other projects.