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Flame retardant fiber and preparation method thereof

A flame-retardant fiber and cellulose technology, which is applied in the manufacture of fire-resistant and flame-retardant filaments, the preparation of spinning solutions, and cellulose/protein conjugated artificial filaments, can solve the problems of reduced flame retardancy, poor flame-retardant durability, and fiber It is difficult to evenly distribute and other problems, and achieve the effect of good flame retardancy, simple process and low cost

Active Publication Date: 2014-09-03
TIANE CHEM FIBER GROUP CORP BAODING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flame retardant finishing is easy to industrialize, but the durability of flame retardant is poor and affects the fabric feel; the method of adding small molecule flame retardants for blend spinning often affects spinning and fiber mechanical properties and spinning and weaving due to the large amount of addition And the use performance; the method of copolymerization modification has serious limitations. At present, the only industrial copolymerization method is acrylic chloride fiber, and the high content of chlorine element will produce a large amount of toxic gas during the combustion process, which is restricted.
The use of fiber materials with intrinsic flame-retardant properties for blend spinning is another method to improve the flame-retardant properties of cellulose fibers or polyacrylonitrile fibers. reduce
Denis Ingildeev et al. used different proportions of polym-phenylene isophthalamide and cellulose to blend and dissolve spinning, but did not obtain blended fibers with flame-retardant effects. The problem lies in the use of conventional spinning methods. The domain size of the two components in the fiber is large, and it cannot play a role in the barrier of the flame-retardant polymer to the cellulose phase

Method used

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  • Flame retardant fiber and preparation method thereof
  • Flame retardant fiber and preparation method thereof
  • Flame retardant fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The cellulose with a degree of polymerization of 200 and the polym-phenylene isophthalamide with an inherent viscosity of 1.5dL / g are mixed according to the ratio of 50:50 in mass ratio, and mixed in 4-methylmorpholine-N Stir in a 50% aqueous solution of the oxide, swell at 80°C, and vacuum dehydrate until completely dissolved to obtain a spinning solution with a total polymer solid content of 5% and an apparent viscosity of 85 Pa·s. Degassing, conveying, filtering at 80°C, cooling down to 70°C, the apparent viscosity of the spinning solution is 650Pa·s. Apply a pressure of 0.4MPa, after passing through a 20mm air section and a coagulation bath (water, 25°C), the drawing ratio in the coagulation bath is 2 times, enter the drawing bath of 60°C water, draw 2 times, and then enter boiling water Drawing bath, drafting 1.2 times, then washing, drying, heat setting, to obtain fibers.

[0027] The monofilament fineness of the fiber was 2.8 dtex, the breaking strength was 3.0 ...

Embodiment 2

[0029] The cellulose with a degree of polymerization of 800 and the polym-phenylene isophthalamide with an inherent viscosity of 2.5dL / g are mixed according to a mass ratio of 20:80, in 1-butyl-3-methanol Stir in imidazolium chloride salt solvent and dissolve at 85°C to obtain a spinning solution with a total polymer solid content of 15% and an apparent viscosity of 530 Pa·s. Degassing, transporting and filtering at 85°C, cooling down to 80°C, the apparent viscosity of the spinning solution is 1030Pa·s. Apply a pressure of 0.6MPa, after passing through a 20mm air section and a coagulation bath (water, 20°C), the drawing ratio in the coagulation bath is 1.5 times, enter the drawing bath of 55°C water, draw 3 times, and then enter boiling water Drawing bath, drafting 1.5 times, then washing, drying, heat setting, to obtain fibers.

[0030] The monofilament fineness of the fiber was 2.4 dtex, the breaking strength was 3.2 cN / dtex, and the domain size of the formed cellulose was ...

Embodiment 3

[0032]Cellulose with a degree of polymerization of 1600 and polym-phenylene isophthalamide with an inherent viscosity of 2.0dL / g are mixed in a mass ratio of 40:60 in 1-butyl-3-methanol Stir in imidazolium bromide salt and dissolve at 70°C to obtain a spinning solution with a total polymer solid content of 10% and an apparent viscosity of 780 Pa·s. Degassing, conveying, filtering at 70°C, cooling down to 50°C, the apparent viscosity of the spinning solution is 1300Pa·s. Apply a pressure of 0.5MPa, after passing through a 20mm air section and a coagulation bath (water, 15°C), the drawing ratio in the coagulation bath is 2.5 times, enter the drawing bath of 60°C water, draw 1.6 times, and then enter boiling water In a drawing bath, the drawing ratio is 2 times, then washed with water, dried, and heat-set to obtain fibers.

[0033] The monofilament fineness of this fiber was 2.9 dtex, the breaking strength was 3.8 cN / dtex, and the domain size of the formed cellulose was 25 nm. ...

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Abstract

The invention relates to a flame retardant fiber and a preparation method thereof. The preparation method comprises the following steps: mixing cellulose or polyacrylonitrile and a flame retardant high polymer according to a ratio, dissolving at high temperature to prepare a high concentration spinning solution, filtering, cooling, pressurizing for extruding, uniformly mixing two components in the spinning solution through a shearing effect generated by pressure, and performing multiple stretching, thereby forming the blended fiber of polyacrylonitrile or cellulose with the phase domain size of less than 50nm. The flame retardant fiber, namely the blended fiber, is prepared by directly spinning, the problem of mixing uniformity is solved, and the flame retardant fiber has the excellent characteristics of good flame retardant performance, high flame retardant durability, zero halogen and phosphorus, low toxicity, comfort and the like and has significance for developing flame retardant fibers which are not toxic, less in smoke and environmentally friendly.

Description

technical field [0001] The invention relates to a flame-retardant fiber and a preparation method thereof, in particular to a blended flame-retardant fiber obtained by direct spinning and a preparation method thereof. Background technique [0002] Cellulose fibers and polyacrylonitrile fibers have long occupied an important position in textiles, but both fibers have the disadvantage of being easy to burn, which limits the safety of their use. In order to improve the flame retardancy of such textiles, the most commonly used methods are flame retardant finishing, adding organic or inorganic small molecule flame retardants, and copolymerization modification. Flame retardant finishing is easy to industrialize, but the durability of flame retardant is poor and affects the fabric feel; the method of adding small molecule flame retardants for blend spinning often affects spinning and fiber mechanical properties and spinning and weaving due to the large amount of addition And the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/02D01F8/12D01F8/08D01F8/10D01F8/16D01F1/07D01D1/02D01D5/12
Inventor 吴开建姚勇波于金超刘洪材程海明王建宁杨曦张玉梅王华平
Owner TIANE CHEM FIBER GROUP CORP BAODING
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