A kind of flame-retardant composite fiber and preparation method thereof

Abstract

The invention discloses a flame retardant composite fiber and a preparation method thereof. The flame retardant composite fiber is a three-layer structure composed of an inner flame retardant layer, a middle wear-resistant layer and an outer flame retardant layer. The inner flame retardant layer Using polysulfone fiber and aramid fiber with high toughness, high strength and good flame retardant effect, compounded with modified polyacrylonitrile fiber to improve the protection effect on the human body, the outer flame retardant layer is made of polyester fiber, bamboo charcoal fiber, Phenolic fiber, which is close to the human body, is made of soft, comfortable and breathable bamboo charcoal fiber and polyester fiber to improve the durability of the fabric. The middle wear-resistant layer is made of polyester fiber, spandex elastic fiber silk, cotton fiber, voile yarn fiber, and plant charcoal Fiber, that is, plant charcoal fiber uses lignin fiber and bamboo fiber as raw materials. The lignin fiber is harmless to the human body and is a green environmental protection product. Toughness, dispersibility and chemical stability, strong water absorption capacity.

Description

technical field [0001] The invention belongs to the technical field of composite fiber preparation, in particular to a flame-retardant composite fiber and a preparation method thereof. Background technique [0002] Commonly used textile fibers such as cotton, wool, silk, hemp, and synthetic fibers such as polyester, nylon, polypropylene, viscose, and rayon have poor high-temperature and flame-retardant properties, but after chemical modification or flame-retardant finishing, they can These fibers are endowed with certain flame retardant properties. Among them, flame-retardant modified synthetic fibers with large application volume include flame-retardant polyester, flame-retardant nylon, flame-retardant eyelon and flame-retardant viscose, etc. Natural fibers include flame-retardant cotton fiber, flame-retardant wool fiber, etc. With the continuous advancement of science and technology, various high-performance flame-retardant fibers and flame-retardant finishing technologie...

AI Technical Summary

Problems solved by technology

[0005] 1. In order to achieve the flame-retardant effect, the existing flame-retardant composite fibers usually add a small amount of halogen flame retardants. During use, the halogen flame retardants will produce toxic and harmful gases when burned, which will lead to large smoke concentrations and poor environmental protection;

[0006] 2. The existing flame-retardant composite fibers are usually made by weaving or bonding. When the combined flame-retardant fibers are processed by bonding, it is usually by applying glue to the bonding surfaces of the multi-layer flame-retardant layers, resulting in flame-retardant composite fibers. The bonding efficiency of fibers is low, and glue application is troublesome;

[0007] 3. The existing bonding device for flame-retardant composite fibers is usually pressed and bonded by a pair of pressing rollers, and the bonding and compounding are completed through a single rolling, so that the bonding of the flame-retardant composite fibers is not firm, and at the same time , the existing bonding devices for flame-retardant composite fibers have relatively large limitations for bonding fiber layers of different thicknesses, and their practicability is poor

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