The structure of the non-woven fabric is classified according to the composition and formation method of the web

Non-woven fabric is also called non-woven fabric. Refers to a fiber layer composed of a certain direction or random arrangement, or a fabric made by interweaving with yarn through mechanical hooks without traditional spinning, weaving or knitting processes through interweaving, stitching or chemical or thermal bonding. Compared with other clothing materials, non-woven fabrics have short production process, high output, low cost, wide fiber application, excellent product performance, wide use and other advantages. Non-woven fabrics have developed rapidly and have become a new industry, which is increasingly used in various fields of the clothing industry. According to the composition and forming method of the fiber web, the structure of the non-woven fabric can be divided into the following categories: 1. Non-woven fabric, fiber network structure (1) The fiber bonding method is to lay short fibers into a laminated fiber web, through The fiber web itself is overlapped or crossed and crosswise to bond the fibers together to make a cloth. Including adhesive bonding and hot melt bonding. A. Adhesive bonding refers to the use of synthetic resin or synthetic fiber adhesive to fix the fiber layer to solidify and bond the fiber network into an inseparable non-woven fabric. According to the type and processing method of the adhesive, it can be divided into point bonding, film bonding, block bonding and partial bonding. This type of nonwoven fabric has good air permeability, but feels very hard, and is often used for wall coverings and disposable products. B. Hot-melt bonding refers to adding hot-melt fibers to the fiber network in advance. When the overlapped fiber web passes through the hot calender, the hot melt fibers in the rolling point or the area where the rolling particles are applied melt to produce a reinforcement effect, thereby bonding other fibers. This non-woven fabric is suitable for making fillings for winter clothing, bedding and filter cloth. It has good filtering performance, elasticity and bulkiness, as well as good air permeability and moisture absorption. Car cloth and tufted carpet base cloth. (2) The bonded non-woven fabric of intertwined fibers refers to the overlapping of appropriate fiber nets through a certain method (such as needle punching, sewing, etc.), so that the fibers are intertwined well, and the non-woven fabric similar to felt knot woven is made. According to the action mode, it can be divided into acupuncture method, jet method, spunbond method and weaving method. A. Needle-punched non-woven fabric is composed of thousands of crochet needles with special structure, which move up and down through the fiber network repeatedly, so that the entire fiber network becomes a dense felt-like non-woven fabric, which is entangled and entangled with each other. This product has a wide range of uses, and can be widely used in geotextiles, bed blankets, filter materials, needle felts and artificial leather cloths. B. Non-woven fabrics using jet-net method are also called non-woven fabrics, using needle-free method. It uses a lot of extremely strong currents to shoot into the fiber net and consolidate into a cloth. It has higher strength, plump feel and good permeability, suitable for clothing lining, shoulder pads, etc. C. Spunbond method: when the synthetic fiber solution of the non-woven fabric is pressed out of the spinning head to make filaments, The generated static electricity and high-pressure airflow are used to make the fibers fall randomly on the metal curtain, and then the non-woven fabric is made by heat setting through a heating roller. Spunbond non-woven fabric has air permeability and water permeability, and is widely used as insulation material in agriculture and animal husbandry. D. Stitched non-woven fabric refers to a non-woven fabric with a compact structure of multi-needle threads passing through a multi-needle sewing machine on a randomly arranged fiber web. The appearance and performance of this kind of cloth are similar to traditional clothing materials, and it is widely used in clothing fabrics and artificial fur cloth, cotton wool and so on. 2. Yarn lining sewing structure non-woven fabric (1) Yarn layer-non-woven fabric with linear stitching yarn and woven yarn with warp and weft, and knitted with flat warp structure to reinforce the yarn layer . The fabrics are organic fabrics and knitted fabrics, with good dimensional stability and high strength, suitable for outerwear fabrics. (2) Yarn layer-loop stitched woven nonwoven fabric, weft yarns overlap to form a network, reinforced by the knitted chain structure formed by stitched y