1 Flame-retardant conventional synthetic fiber 1 copolymerization flame retardant: obtained by copolymerization of a spinning polymerization monomer and a flame retardant monomer. For example, Herst's Trevira type 271 modified polyester fiber, Japan's Cordelon modified vinylon - vinyl chloride. The most important one is the nitrile chloride series, which is a fiber made by wet or dry spinning of a copolymer of acrylonitrile and vinyl chloride or vinylidene chloride, except acrylonitrile, vinyl chloride or vinylidene chloride. In vitro, an alkyl or alkenyl sulfonate is generally selected as the third monomer to improve the dyeing properties of the fiber. Partial nitrile chlorinated fiber products are shown in Table l below. Name Manufacturer Flame Retardant Monomer Polymerization Process Spinning Process Solvent Kaisi Suan N Japan Asahi Kasei VDC Precipitating Wet Spinning Nieflon / Japanese Bell Spinning / VDC / Solution / Wet Spinning / DMF Enfra / Japan Toray / VDC / Solution / Wet Spinning / DMSO Kaykalun / Japan Zhong Yuan / VC / Precipitation / Wet Spinning / Acetone Denar / UCC / VC / Precipitation / Wet Spinning / Acetone Alpha FLR / DuPont / VDC / Precipitation / Dry Spinning / DMA Tektronon / UK Courtaulds / VDC / Precipitation / Wet Spinning / Acetone Velikon FR / Italy Snia Viscose / VDC / Solution / Wet Spinning / DMF Delamon C / German Bayer / VDC / Precipitation / Dry Spinning / DMF Nitrile Chloride / China Fushun Flame Retardant Acrylic Fiber Factory / VDC / Solution / Wet Spinning DMF * DMA Dimethylacetamide DMP - Dimethylformamide DMS0 Dimethyl Sulfoxide
2 Blending flame retardant: through the blending of different polymers, a certain amount of flame retardant is mixed, and the obtained fiber has flame retardant properties. For example, if polyester or polypropylene is added with bromine or phosphide, flame retardant polyester or polypropylene can be produced. Finland's Visil flame-retardant viscose fiber, which contains silicic acid compounds, remains in the fiber and remains in fiber form. The flame retardant fibers that have been successfully produced in China are flame retardant polyester, polypropylene, acrylic, vinylon and viscose. Among them, flame retardant polyester and flame retardant polypropylene can be industrially produced.
2 high temperature resistant fiber functional non-woven fabric with high temperature resistant fiber has general glass fiber, carbon fiber, meta-aramid, polybenzimidazole, phenolic, polyphenylene sulfide, polymelamine and aromatic heterocyclic polymerization High temperature resistant fiber such as fiber. The meta-polyamides are Nomex from Dupont, Conex from Teijin, P84 from polybenzimidazole, BasofiI from BASF with polymelamine, and Kerme I, Ekono I, and PBO and PBZT fibers from aromatic heterocycles.
Antibacterial and deodorant fiber is developed on the antibacterial and deodorizing treatment technology. Internationally, since the 1980s, a method of preparing a durable antibacterial and deodorant fiber by means of polymer structure modification and blending modification of chemical fibers has appeared, and the blending method is mainly used. Compared with the antibacterial and deodorizing treatment technology, the antibacterial and deodorizing fiber has good deodorizing effect and durability, and the fiber does not adhere to the resin, and the obtained fabric has good hand feeling, simple process, no need for finishing, and low cost. Although the antibacterial and deodorant finishing is convenient to process, the antibacterial and deodorizing effect is not ideal. After dozens of washings, the antibacterial and deodorizing effect of the fabric is lowered, and it is difficult to meet the requirements of consumers. The rapid development of chemical fiber has provided a very broad world for fiber modification, which has led people to turn the perspective of textile antibacterial and deodorant treatment to fiber modification to obtain antibacterial and deodorant textiles. This method has high technical content and high difficulty, and involves a wide range of engineering fields, especially for antibacterial and deodorant, but it is favored by customers because of its obvious advantages.
There are four main methods for processing antibacterial and deodorant fibers. 1 Chemical modification is used to graft antibacterial fiber groups onto the fibers. For example, the Japanese silk dyeing company uses the dyeing method to form the coordination bond between the -CN group of the acrylonitrile fiber and the CugSs to produce the Saint-Brand SS-N fiber, which is both antibacterial, deodorant and conductive and antistatic.
2 In the spinning process, the antibacterial agent is added to a polymer such as acrylonitrile or polyamide to mix and spun. This is the main means of developing antibacterial and deodorant fibers.
3 Physically modify the antibacterial agent into the deeper part of the fiber surface. In the case of melt spinning, the antibacterial deodorant is added to the spinning oil agent and cooled with the drawing, so that the molten fiber filaments enclose the antibacterial deodorant into the surface layer when contracted. The antibacterial deodorant solution can be sealed by immersing the gel state fiber in the wet spinning in the antibacterial deodorant solution. Development of micro
Functional raw materials for functional composite nonwoven processing
The fibers in the raw materials for functional composite nonwovens generally include flame retardant fibers, antibacterial fibers, antistatic or conductive fibers, highly absorbent fibers, degradable fibers, and differentiated fibers. The functions of these fibers are after the fibers themselves are processed by spinning. Having, not attached by post-finishing. Functional composite fabric of nonwoven material further comprises some functional finishing agents, finishing agents which may be processed to fibers or nonwoven fabric to impart special finished nonwoven product features.
Flame-retardant fiber flame-retardant fiber consists of two major categories. One is to add flame retardant to the spinning solution of conventional chemical fiber (nylon, polyester, acrylic, polypropylene, etc.). The flame retardant can be blended or copolymerized and polymerized. The fiber acts to obtain permanent flame retardant fiber; the other is high temperature resistant and refractory fiber. The fiber itself has a high melting point and is not easy to burn. This fiber can also be used for special industrial high temperature nonwoven fabric filter. , felt and gasket.
Antibacterial fiber
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