Crosslinked acrylate-based fibers and the production thereof
A technology of cross-linking acrylic and acrylic, which is applied in the direction of fiber type, fiber treatment, flame-retardant fiber, etc., can solve the problems of high flame retardancy and high moisture absorption/desorption speed incompatibility, and achieve high moisture absorption/moisture release The effect of wetting speed
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Embodiment 1
[0070] A doping solution for spinning was prepared by dissolving an acrylonitrile polymer including 90% acrylonitrile and 10% methyl acrylate in a 48% aqueous solution of sodium thiocyanate. Material fibers of 0.9 dtex and 70 mm were obtained through spinning, water washing, drawing, crimping and heat treatment according to conventional methods. The material fiber was immersed in a 15% hydrazine hydrate aqueous solution at a bath ratio of 1:10 and treated at 120° C. for 1 hour. The obtained fibers were washed with water, immersed in a 4% ammonium persulfate aqueous solution at a bath ratio of 1:10, and subjected to peroxide treatment at 100°C for 1 hour. Then, the obtained fiber was immersed in a 5% sodium hydroxide aqueous solution at a bath ratio of 1:10, hydrolyzed at 110° C. for 1 hour, and washed with water to obtain a sodium salt type crosslinked acrylic fiber. The evaluation results of the obtained fiber properties are shown in Table 1 and figure 1 .
Embodiment 2
[0074] The cross-linked acrylic fiber prepared in Example 1 is treated with a 1mol / l aqueous solution of nitric acid to convert the carboxyl group into the H form, washed with water, adjusted to pH 12 with 1mol / l sodium hydroxide and washed with water to obtain Type carboxyl fibers. The obtained fiber was immersed in an aqueous solution of magnesium nitrate containing 1.2 times the equivalent of the carboxyl group of the fiber, to be converted into a magnesium salt type at 50° C. for 1 hour, and then washed with water, thus preparing a magnesium salt type Cross-linked acrylic fibers. The evaluation results of the obtained fiber properties are shown in Table 1 and figure 1 .
Embodiment 3
[0078] Except for the peroxide treatment using 3% aqueous hydrogen peroxide, the same operation as in Example 1 was carried out to obtain a sodium salt type crosslinked acrylic fiber. Table 1 shows the evaluation results of the obtained fiber properties.
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