The filament geotextile and the short filament geotextile are formed by mutual needling of the main needle and the inverted needle of the needle machine. The needle of the filament geotextile is equipped with a barb. The lower filament can be pulled to the top, and the upper filament can be pulled to the bottom to increase the tension. The elongation is also increased according to the depth and density of the needle. Of course, the geotextile after the needle will have many small pinholes, which can filter water and stone sand well, and play a role in moisturizing the pavement.

Due to the large tensile force of filament geotextile, its index performance is higher than that of short filament geotextile, and it has been used for many times, which is popular with the majority of project builders. It can complete the construction with quality and quantity without increasing costs. The weight of filament geotextile is generally 100g-800g, the tensile force is 4.5KN-40KN, and the elongation is 40% - 80%.

Polyester long fiber nonwoven geotextile has excellent heat and light resistance. Even if it is exposed to the environment of nearly 20 ℃ for a short time, its performance has hardly changed. Through a large number of tests and practices, it has been proved that polyester long-fiber non-woven geotextile has long-term corrosion resistance to various natural soils, moisture and microorganisms.

Filament geotextile can isolate soil layers with different components and properties for a long time and prevent mixing; It has frost resistance and bearing requirements for construction. It has good anti-filtration performance and anti-corrosion performance, and water can permeate in all directions without accumulating pressure. At the same time, it can prevent soil loss, and is conducive to stability and anti-corrosion performance.

Due to its fluffy structure, it can effectively control the drainage of geotechnical engineering surface. Due to its good puncture resistance, extensibility and bulkiness, it can effectively protect the waterproof layer from potential mechanical damage. The bulkiness and high strength improve the overall stability and strength of the project. The filament geotextile mainly plays a protective role to prevent the plastic cloth from being damaged by the concrete slab.

In addition, the short-fiber needled geotextile has also been used as a drainage facility in the falling dam of the Angou River and in the treatment of the soft foundation of the sea embankment, and has received good technical and economic results.