Preparation method of anti-pilling acrylic fiber

Abstract

The invention discloses a preparation method of anti-pilling acrylic fiber, which comprises the steps: three monomers including 93.5-94.5wt% of acrylonitrile, 5.25-6.05wt% of vinyl acetate and 0.25-0.45% of sodium methylallyl sulfonate are mixed, the concentration of the mixture is regulated to 30-40wt%, water phase suspension polymerization reaction is continuously implemented; the polymer after reaction is terminated by means of chelation reaction and then steam-stripped to separate out unreacted monomer, the unreacted monomer is salt / moisture-removed by a washing filter, then subject to granulation molding and finally dried to result in powdery polymer, the powdery polymer is mixed with and dissolved in DMAC, the powdery polymer-dissolved DMAC is heated up, cooled and filtered to prepare spinning solution, and the spinning solution is subject to spinning, double diffused molding, water washing, oiling, drying and curling to include the draft multiple of 4-7, and the anti-pilling acrylic fiber with the level of anti-pilling performance larger than 4 and the strength of 0.6 + / - 0.2CN / dtex is obtained by shaping through shaping pressure of 120-200kPa.

Description

technical field [0001] The invention belongs to a preparation method of anti-pilling fiber, in particular to a preparation method of anti-pilling acrylic fiber. Background technique [0002] Most synthetic fibers will experience pilling during use. Although acrylic fiber has the reputation of artificial wool, because the macromolecule of acrylic fiber is in an irregular helical conformation and does not have a real crystalline structure, the strength of the fiber is much higher than that of natural fibers and recycled fibers, and the formation rate of fiber pellets on the surface of its products It is greater than the shedding rate, so when the friction force cannot eliminate the fiber pellets, the formed fiber pellets will remain on the surface of the fabric for a long time, thereby seriously affecting the appearance and wearing comfort of the fabric. At present, the main methods to reduce acrylic pilling are: [0003] (1) Coating a layer of modified finishing agent on th...

AI Technical Summary

Problems solved by technology

The main problem of this method is that once the finishing agent fails on the surface of the fiber, the anti-pilling performance of the fiber will decrease; Technological conditions are used to change and reduce the pilling performance of the fiber, but the effect is not good, and the dyeing performance of the fiber is poor, which cannot meet the requirements for the production of high-grade fabrics, and the anti-pilling performance level only reaches 3 to 4

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