Shanghai “Yingfan” filament geotextile is a long-spun spunbonded needle-punched non-woven geotextile. Filament geotextile is a new type of construction material used in civil engineering. The filament fiber passes through different equipment and processes. Paved into a net shape, and then subjected to acupuncture and other processes to make different fibers intertwined with each other, entangled and fixed to make the fabric normalized, so that the fabric is soft, full, thick and stiff, to achieve different thickness to meet the use requirements, according to the use The length of the silk is divided into filament geotextile or short geotextile. The tensile strength of the filament is higher than that of the short filament. The softness of the fiber has a certain tear resistance and has a good main function: filtration and drainage. Reinforcement. Specifications range from 100 grams per square meter to 800 grams per square meter. The main material is polyester fiber, which has superior water permeability, filterability, durability and deformation adaptability, and has good flat drainage capacity.