阅读说明：本技术 一种防掉毛抗起球羊毛衫的制备方法 (Preparation method of anti-hair-slip anti-pilling woolen sweater ) 是由 邵雪静 孙宇 于 2020-03-06 设计创作，主要内容包括：本发明公开了一种防掉毛抗起球羊毛衫的制备方法,本发明属于纺织技术领域,本发明通过共混改性和共聚改性的有机结合,使制备的羊毛衫防掉毛抗起球,具有抗汗渍,手感细腻、亲和柔软、飘逸悬垂的优良特性,抗起球摩擦大于3.5级,使纤维表面光滑,产生蚕丝般的光滑,防掉毛抗起球羊毛衫具有闪光的特性,纤维柔软,坚牢度高,耐用性好,不毡化,不起毛球,穿着时伸缩自如,弹性舒适合体,有很强的市场竞争力。(The invention discloses a preparation method of a woolen sweater with hair slip prevention and pilling resistance, which belongs to the technical field of spinning, and the invention organically combines blending modification and copolymerization modification to ensure that the prepared woolen sweater with hair slip prevention and pilling resistance has the excellent characteristics of sweat stain resistance, fine and smooth hand feeling, affinity and softness and elegant suspension, the pilling resistance friction is more than 3.5 grade, the fiber surface is smooth, silky smoothness is generated, the woolen sweater with hair slip prevention and pilling resistance has the characteristic of flashing, the fiber is soft, the fastness is high, the durability is good, the woolen sweater is not felted, the woolen sweater is free to stretch when being worn, the wool sweater is elastic and comfortable, and the market competitiveness is very strong.)

1. The preparation method of the anti-hair-slip anti-pilling woolen sweater is characterized by comprising the steps of preparing woolen sweater fibers with the fineness of 1.33-1.66 dtex, wherein the woolen sweater fibers are composed of vinyl chloride-acrylonitrile fibers, namely vinyl chloride-vinyl acetate-acrylonitrile copolymer fibers and modified acrylonitrile fibers, and the mass ratio of the vinyl chloride-acrylonitrile fibers is 35-50 wt%: 50-65 wt% of modified acrylonitrile fiber, and the preparation method comprises the following steps: (1) adding vinyl chloride monomer, vinyl acetate monomer, initiator and emulsifier solution into a high-pressure reaction kettle, fully stirring, then starting reaction at 60 ℃ for 0.5-1 h, heating to 80-85 ℃, uniformly dropwise adding acrylonitrile monomers during the reaction, stirring for reaction for 1-2 h, releasing pressure and discharging, desalting, washing and dehydrating the obtained emulsion, drying at 60 ℃ under normal pressure for 8-10 h to obtain chloroethylene-vinyl acetate-acrylonitrile copolymer, fully dissolving the prepared chloroethylene-vinyl acetate-acrylonitrile copolymer in a stainless steel spinning kettle by using dimethyl sulfoxide, after the polymer is uniformly dissolved, extruding from a spinneret plate of a spinning machine, precipitating through a coagulating bath, stretching through a stretching bath and washing through a water washing bath to obtain copolymer fiber, and obtaining vinyl chloride-vinyl acetate-acrylonitrile copolymer fiber after heat setting and drying; (2) adding 15-35 parts by weight of cellulose grafted acrylonitrile copolymer and 140-160 parts by weight of water into another reaction kettle, heating in a water bath to 70-80 ℃, stirring for 1-2 hours, stopping the reaction, cooling to room temperature, neutralizing the reactant with dilute hydrochloric acid until the pH value is 3-4, separating with a high-speed centrifuge, pouring out the supernatant, washing twice with a mixed solvent of methanol and ethanol in a volume ratio of 2:1, and drying in vacuum at 60 ℃ to obtain cellulose modified polyacrylonitrile; (3) then adding 10-15 parts of nitrile rubber, 1-3 parts of magnesium oxide, 0.2-0.5 part of polyethylene glycol, 0.2-0.4 part of zinc dimethyldithiocarbamate, 0.2-0.4 part of dibenzoyl peroxide, 8-12 parts of acrylonitrile and 15-17 parts of cellulose modified polyacrylonitrile into an open mill at 60-70 ℃, adding other raw materials except the magnesium oxide and the acrylonitrile monomer, mixing for 3-5 min, adding the magnesium oxide, mixing uniformly, adding the acrylonitrile monomer, mixing uniformly, placing for 24h, aging, and extruding by using a double-screw extruder to obtain modified acrylonitrile fibers; (4) mixing the vinyl chloride-acrylonitrile fiber and the modified acrylonitrile fiber with a solvent to obtain a spinning stock solution, spinning the spinning stock solution after temperature and pressure adjustment and filtration, carrying out coagulation bath double-diffusion forming, and then washing, drafting, oiling, drying, curling and shaping to obtain the anti-hair-falling and anti-pilling fine wool; (5) the method comprises the steps of combing, complex combing and strip making of fine wool with hair falling prevention and pilling resistance, spinning into single yarns, plying, twisting and plying the wool combed yarns, spinning into fabrics by a knitting method, plain knitting, weaving into pieces on a horizontal loom, inlaying and splicing into a woolen sweater, and then performing fulling heat treatment to obtain the combed woolen sweater.

2. The preparation method of the anti-hair-slip and anti-pilling woolen sweater according to claim 1, wherein the mass ratio of the sum of the mass of the chlorinated vinegar-acrylonitrile fiber and the modified acrylonitrile fiber to the solvent in the step (4) is 16-19.5: 80.5 to 84.

3. The method for preparing a picking-proof and pilling-resistant woolen sweater according to claim 1, wherein the weight ratio of the vinyl chloride monomer, the vinyl acetate monomer and the acrylonitrile monomer in the step (1) is 70: 20: 10; the amount of the initiator is 0.08-0.10 of the weight of the monomer, the dosage of the emulsifier solution is 1-2 times of the weight of the monomer, the mass concentration of the emulsifier solution is 0.05-0.08, and the initiator is ammonium persulfate or azodiisobutyramidine hydrochloride; the solvent is dimethylacetamide, dimethyl sulfoxide or dimethylformamide; the emulsifier is sodium allylsulfonate or secondary alkyl sulfonate.

4. The preparation method of the anti-hair-slip and anti-pilling woolen sweater according to claim 1, wherein in the step (4), the spinning is carried out at a pressure of 1.0-1.2 MPa and a temperature of 100-105 ℃; the coagulating bath is composed of dimethylacetamide and dimethyl sulfoxide, the temperature is 25-50 ℃, and the drafting multiple is 11-12 times; the shaping is carried out by the pressure of 100-150 kPa.

5. The method for preparing the wool sweater capable of preventing hair falling and pilling comprises the steps of adding 15-17 parts of water into 10-12 parts of viscose stock solution, mixing, heating to 80-85 ℃ under the nitrogen protection atmosphere, keeping the temperature for 10-20 min, carrying out water bath at 85-90 ℃, stirring for 5-10 min, adding 1-2 parts of 0.1 mol/L ammonium persulfate solution, stirring for l0min, adding 56-64 parts of acrylonitrile within 20min, continuously stirring for 2-3 h, cooling the reactant to room temperature, filtering, washing the precipitate with distilled water, drying at 60 ℃ to obtain the cellulose grafted acrylonitrile copolymer, washing with distilled water, repeating the steps twice, and drying to obtain the cellulose grafted acrylonitrile copolymer, wherein the content of sodium hydroxide in the viscose stock solution is 7%, and the content of cellulose is 6.8%.

Technical Field

The invention belongs to the technical field of textiles, and particularly relates to a preparation method of a wool sweater capable of preventing wool slip and pilling.

Background

Cashmere sweaters will not be pilling and are related to many factors, pure cashmere sweaters will also be pilling, and what is not said to be pilling is fake cashmere. Even the cashmere sweater with the highest quality has slight pilling phenomenon in a proper range; the high-quality pure cashmere can have low pilling rate under the condition of correct care. As a cashmere sweater, pilling is not abnormal. In the using process of the cashmere sweater, the cashmere sweater is continuously rubbed, so that the fiber ends on the surface of the cashmere sweater are pulled, brought, hooked and hung, and hairiness is formed on the surface of the cashmere sweater, which is called fuzzing. When the hairs are gradually drawn and extend out and generally exceed more than 5mm, the hairs are subjected to friction, and the fiber ends are mutually hooked and wound to form irregular spherical shapes, namely pilling. The cashmere sweater is rubbed continuously in use, the fiber balls are gradually compacted, the fibers connected on the cashmere sweater are subjected to repeated flexing and fatigue in different directions until the fibers break, the fiber balls fall off from the surface of the fabric, and then the fiber hairiness at the broken head end can be pulled out continuously in use to form the fiber balls again. In the initial stage of using the cashmere sweater, the number of the fiber balls is gradually increased, and the fiber balls formed firstly begin to fall off along with the prolonging of the friction time, but the total amount of the fiber balls is increased at the moment, after a certain time, the falling number and the newly increased number of the fiber balls are gradually leveled, and then the total amount of the fiber balls begins to gradually decrease. When the fiber is hard to bend and wind, the surface of the fabric is not easy to pilling, when the fibers in the fabric are tightly intertwined with each other, the yarn twist is high, the fabric tightness is high, and the friction factor is large, the fiber end on the surface of the fabric is not easy to pull out and extend, the pilling is less, and when the repeated bending fatigue resistance of the fiber is low, the fiber balls on the surface of the fabric are easy to fall off, so that the total amount of the fiber balls is low. After the fabric is fluffed and pilling, the luster, the flatness, the texture and the patterns of the surface of the fabric can be changed, a large number of particles float, and the appearance and the hand feeling of the cashmere sweater are seriously influenced. The technical personnel in the field need to develop a preparation method of the anti-linting and anti-pilling woolen sweater to meet the higher market demand and performance requirement.

Disclosure of Invention

The invention aims to provide a preparation method of a woolen sweater capable of preventing hair slip and pilling, aiming at the existing problems.

The preparation method of the anti-hair-slip anti-pilling woolen sweater comprises the steps of preparing woolen sweater fibers with the fineness of 1.33-1.66 dtex, wherein the woolen sweater fibers are composed of vinyl chloride-vinyl acetate-acrylonitrile copolymer fibers and modified acrylonitrile fibers, and the mass ratio of the vinyl chloride-acrylonitrile fibers is 35-50 wt%: 50-65 wt% of modified acrylonitrile fiber, and the preparation method comprises the following steps: (1) adding vinyl chloride monomer, vinyl acetate monomer, initiator and emulsifier solution into a high-pressure reaction kettle, fully stirring, then starting reaction at 60 ℃ for 0.5-1 h, heating to 80-85 ℃, uniformly dropwise adding acrylonitrile monomers during the reaction, stirring for reaction for 1-2 h, releasing pressure and discharging, desalting, washing and dehydrating the obtained emulsion, drying at 60 ℃ under normal pressure for 8-10 h to obtain chloroethylene-vinyl acetate-acrylonitrile copolymer, fully dissolving the prepared chloroethylene-vinyl acetate-acrylonitrile copolymer in a stainless steel spinning kettle by using dimethyl sulfoxide, after the polymer is uniformly dissolved, extruding from a spinneret plate of a spinning machine, precipitating through a coagulating bath, stretching through a stretching bath and washing through a water washing bath to obtain copolymer fiber, and obtaining vinyl chloride-vinyl acetate-acrylonitrile copolymer fiber after heat setting and drying; (2) adding 15-35 parts by weight of cellulose grafted acrylonitrile copolymer and 140-160 parts by weight of water into another reaction kettle, heating in a water bath to 70-80 ℃, stirring for 1-2 hours, stopping the reaction, cooling to room temperature, neutralizing the reactant with dilute hydrochloric acid until the pH value is 3-4, separating with a high-speed centrifuge, pouring out the supernatant, washing twice with a mixed solvent of methanol and ethanol in a volume ratio of 2:1, and drying in vacuum at 60 ℃ to obtain cellulose modified polyacrylonitrile; (3) then adding 10-15 parts of nitrile rubber, 1-3 parts of magnesium oxide, 0.2-0.5 part of polyethylene glycol, 0.2-0.4 part of zinc dimethyldithiocarbamate, 0.2-0.4 part of dibenzoyl peroxide, 8-12 parts of acrylonitrile and 15-17 parts of cellulose modified polyacrylonitrile into an open mill at 60-70 ℃, adding other raw materials except the magnesium oxide and the acrylonitrile monomer, mixing for 3-5 min, adding the magnesium oxide, mixing uniformly, adding the acrylonitrile monomer, mixing uniformly, placing for 24h, aging, and extruding by using a double-screw extruder to obtain modified acrylonitrile fibers; (4) mixing the vinyl chloride-acrylonitrile fiber and the modified acrylonitrile fiber with a solvent to obtain a spinning stock solution, spinning the spinning stock solution after temperature and pressure adjustment and filtration, carrying out coagulation bath double-diffusion forming, and then washing, drafting, oiling, drying, curling and shaping to obtain the anti-hair-falling and anti-pilling fine wool; (5) the method comprises the steps of combing, complex combing and strip making of fine wool with hair falling prevention and pilling resistance, spinning into single yarns, plying, twisting and plying the wool combed yarns, spinning into fabrics by a knitting method, plain knitting, weaving into pieces on a horizontal loom, inlaying and splicing into a woolen sweater, and then performing fulling heat treatment to obtain the combed woolen sweater.

In a further scheme, the mass ratio of the sum of the mass of the vinyl chloride-acrylonitrile fibers and the mass of the modified acrylonitrile fibers to the mass of the solvent in the step (4) is 16-19.5: 80.5 to 84.

In a further scheme, the weight ratio of the vinyl chloride monomer, the vinyl acetate monomer and the acrylonitrile monomer in the step (1) is 70: 20: 10; the amount of the initiator is 0.08-0.10 of the weight of the monomer, the dosage of the emulsifier solution is 1-2 times of the weight of the monomer, the mass concentration of the emulsifier solution is 0.05-0.08, and the initiator is ammonium persulfate or azodiisobutyramidine hydrochloride; the dosage of the emulsifier solution is 1-2 times of the weight of the monomer, the mass concentration of the emulsifier solution is 0.05-0.08, and the solvent is dimethylacetamide, dimethyl sulfoxide or dimethylformamide; the emulsifier is sodium allylsulfonate or secondary alkyl sulfonate.

In the further scheme, in the step (4), the spinning is carried out under the pressure of 1.0-1.2 MPa and the temperature of 100-105 ℃; the coagulating bath is composed of dimethylacetamide and dimethyl sulfoxide, the temperature is 25-50 ℃, and the drafting multiple is 11-12 times; the shaping is carried out by the pressure of 100-150 kPa.

According to a further scheme, the preparation method of the cellulose grafted acrylonitrile copolymer in the step (2) comprises the steps of adding 15-17 parts of water into 10-12 parts of viscose stock solution, mixing, heating to 80-85 ℃ under the nitrogen protection atmosphere, keeping the temperature for 10-20 min, carrying out water bath at 85-90 ℃, stirring for 5-10 min, adding 1-2 parts of 0.1 mol/L ammonium persulfate solution, stirring for l0min, adding 56-64 parts of acrylonitrile in 20min, continuing stirring for 2-3 h, cooling the reactant to room temperature, filtering, washing the precipitate with distilled water, drying at 60 ℃ to obtain the cellulose grafted acrylonitrile copolymer, washing with distilled water again, repeating the steps twice, and drying to obtain the cellulose grafted acrylonitrile copolymer, wherein the content of sodium hydroxide in the cellulose stock solution is 7%, and the content of cellulose is 6.8%.

The invention has the beneficial effects that:

for common woolen sweater products, particularly knitwear, the woolen sweater products are easy to pilling when being frequently rubbed, so that the aesthetic property of the knitwear products is influenced. The woolen sweater prepared by the preparation method disclosed by the invention adopts a unique treatment process combining copolymerization modification and blending modification, and organically combines natural plant macromolecular viscose cellulose and acrylonitrile through blending and in-situ polymerization, so that the woolen sweater has the advantages of lower density, lighter warmth, and good anti-pilling and antistatic properties. And the introduction of the vinyl chloride-vinyl acetate-acrylonitrile copolymer fiber not only improves the strength, corrosion resistance and anti-silty sweat stain performance, but also reduces the bendability of the fiber, the breaking strength, hook strength, extensibility and hook elongation of the fiber, improves the anti-pilling performance of the fiber, shows excellent anti-pilling performance, and achieves the standards of more than 4 grades in anti-pilling performance and acid and alkali resistance. When liquid acrylonitrile is blended and modified with nitrile rubber in an open mill, the acrylonitrile and the nitrile rubber have good compatibility, small molecules of acrylonitrile monomers are well dispersed among molecular chains of the nitrile rubber, the acrylonitrile and the nitrile rubber play a good internal plasticizing role, and form a mutual transmission polymer network with the nitrile rubber after in-situ polymerization so as to improve the strength and the elasticity of modified acrylonitrile fibers, while the cellulose modified polyacrylonitrile not only further improves the fluidity and the processability of the fibers, but also can ensure that the fibers are easy to extrude in the extrusion process, so that the modified acrylonitrile fibers can be prepared, and the acrylonitrile is subjected to in-situ polymerization reaction in the process, polyethylene glycol and magnesium oxide are used as activating agents to synthesize polyacrylonitrile components, and the cellulose grafted acrylonitrile copolymer has rich surface groups and is uniformly dispersed in a polymer matrix, the extensibility and the hooking extension of the fiber are reduced, and the anti-hair-falling and anti-pilling performance of the woolen sweater is improved.

Compared with the prior art, the invention has the following advantages:

the invention discloses a method for preparing a woolen sweater with the characteristics of hair slip prevention and pilling resistance, which is characterized in that the prepared woolen sweater has the advantages of fine and smooth hand feeling of a woven fabric, affinity, softness, elegant suspension, pilling resistance friction of more than 3.5 grade, smooth fiber surface and silky smoothness, simple and easy preparation method, glittering characteristic, soft fiber, high fastness, good durability, no felting, no pilling, easy cleaning after contamination, free expansion and contraction during wearing, comfortable fit and strong market competitiveness.

Detailed Description

The invention is illustrated by the following specific examples, which are not intended to be limiting.