Polyester filament geotextile is made by spinning and needle-bonding by polyester method. The product specifications are arbitrarily selected from 80-800g/m 2 . It is a geosynthetic material used in geotechnical engineering and civil engineering. It is made by a method of forming and solidifying polyester filaments, and the fibers are arranged in a three-dimensional structure. In addition to good mechanical properties, it also has good vertical and horizontal drainage performance and good elongation properties and high chemical stability, such as bio-resistance, acid-base resistance and aging resistance. At the same time, it has a wide pore size range, a tortuous pore distribution,
Excellent permeability and filtration properties. Polyester filament geotextiles have been widely used in the field of infrastructure construction and are gradually being applied to a wider range of fields.