Processes of three kinds of geotextiles: non-woven, woven and warp knitting (non-woven equipment)

Geotextile is a kind of industrial textile, which includes non-woven geotextile, woven geotextile and warp-knitted composite geotextile. These three kinds of geotextiles have different characteristics due to different manufacturing processes. The non-woven geotextile has good adhesion, the woven geotextile has good stability function, and the warp-knitted composite geotextile has strong tear resistance. Non-woven geotextile: Non-woven geotextile is made of filaments or short fibers that are laid out into a net through different equipment and processes. After acupuncture and other processes, different fibers are interlaced with each other, entangled and fixed to standardize the fabric , Make the fabric soft, plump, solid and stiff to meet the application requirements in different thicknesses. The non-woven geotextile has good fabric gaps and good adhesion and separation, because the fiber is soft and has certain tear resistance and anti-seepage Membrane force has a good deformation adaptability, together with a good flat drainage ability, a soft surface with multiple voids, a good friction coefficient, can add adhesion ability such as soil particles, can prevent fine particles from passing through and prevent the loss of particles. Excluding the remaining moisture, the appearance is soft and has good protection ability. According to the length of the filament, it is divided into filament non-woven geotextile or short filament non-woven geotextile. They can play a very good role in filtering, blocking, reinforcement, protection, etc., is a widely used geosynthetic material. The tensile strength of filament yarn is higher than that of short yarn, and it can be selected and used according to detailed requirements.

Woven geotextile (reinforced geotextile): Woven geotextile is composed of at least two sets of parallel yarns (or flat yarns), one set is called warp along the longitudinal direction of the loom (the direction in which the fabric travels), and the other Lateral placement is called weft. Different weaving equipment and techniques are used to interlace the warp and weft into a cloth shape, which can be woven into different thicknesses and densities according to different application ranges. Generally, spinning geotextiles have relatively strong resistance in both vertical and horizontal directions. Tensile strength (longitude is greater than latitude), has a good stability function. Woven geotextiles can be divided into two categories: reinforced geotextiles and unreinforced geotextiles according to the weaving process and the use of warp and weft. The warp tensile strength of reinforced geotextiles is far greater than that of general geotextiles. The general practical application of woven geotextiles and geotechnical engineering items are intended to be reinforced and strengthened. The main function is reinforcement and reinforcement. It has a plane barrier and protection function. It does not have a plane drainage function and can be selected according to detailed application intentions.

Warp-knitted composite geotextile: Warp-knitted composite geotextile is a new type of geotextile made of glass fiber (or synthetic fiber) as reinforcement material, which is compounded with staple fiber needle punched non-woven fabric. Warp-knitted composite geotextile is different from general woven fabric. Its characteristic is that the intersection of warp and weft is not bent, and each is in a straight state. Use the binding thread to bind the two firmly, which can be fully and uniformly synchronized, accept external force and spread stress, and when the applied external force tears the material, the yarn will gather along the initial crack to increase the tear resistance. When warp-knitting is combined, the warp-knitted binding thread is used to repeatedly pass through the fiber layers of the warp, weft and short fiber needle-punched geotextile, so that the three are knitted together. Therefore, the warp-knitted composite geotextile not only has the characteristics of high tensile strength and low elongation, but also has the function of needle punched non-woven fabric. Therefore, the warp-knitted composite geotextile is a kind of reinforcement that can be used for reinforcement, barrier protection, and has a good effect of collecting water and different water in the three-dimensional overall normal and level. Because the solid matrix and pores are in continuous phase and become porous, it is a multi-functional geocomposite material. It is a high-level geo-composite base material in the world today.