CN112391856B - Method for resist dyeing of nylon fiber and protein powder - Google Patents
Method for resist dyeing of nylon fiber and protein powder Download PDFInfo
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- CN112391856B CN112391856B CN202011167253.XA CN202011167253A CN112391856B CN 112391856 B CN112391856 B CN 112391856B CN 202011167253 A CN202011167253 A CN 202011167253A CN 112391856 B CN112391856 B CN 112391856B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/24—Polyamides; Polyurethanes
- D06P3/243—Polyamides; Polyurethanes using vat or sulfur dyes, indigo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/22—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using vat dyestuffs including indigo
- D06P1/221—Reducing systems; Reducing catalysts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/46—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/642—Compounds containing nitrogen
- D06P1/649—Compounds containing carbonamide, thiocarbonamide or guanyl groups
- D06P1/6495—Compounds containing carbonamide -RCON= (R=H or hydrocarbons)
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/651—Compounds without nitrogen
- D06P1/65106—Oxygen-containing compounds
- D06P1/65131—Compounds containing ether or acetal groups
Abstract
The invention provides a method for pad dyeing of nylon fiber and protein powder. Firstly, sequentially adding vat dye, sodium hydroxide, thiourea dioxide, glacial acetic acid and a carrier according to a preset concentration to prepare vat dye liquor; then adding the mixture of the nylon fiber and the protein powder into a dye solution for a chromatography dyeing process to finish the respective dye-uptake of the nylon fiber and the protein powder; and finally, putting the dyed protein powder and the nylon fiber in circulating water for washing, cleaning, bleaching and separating to obtain the dyed nylon fiber and the dyed protein powder respectively. The over-dyeing method can remarkably improve the dyeing efficiency of the nylon fiber which is difficult to dye, effectively improves the dyeing phenomenon of the nylon fiber by utilizing the excellent adsorption performance and gradual release action of the protein powder to the vat dye while over-dyeing the protein powder, and the dyed nylon fiber and the protein powder have excellent light fastness.
Description
Technical Field
The invention relates to the technical field of textile printing and dyeing, in particular to a method for resist-dyeing nylon fibers and protein powder.
Background
The nylon fiber has the advantages of high breaking strength, good fatigue resistance, good wear resistance and the like, is the second largest synthetic fiber with the yield second to polyester, and is widely applied to the fields of textile clothing, automobile industry and the like. The nylon dyeing is easy to dye due to the molecular structure of the fiber, so that the defective rate of products is high.
The vat dye has the excellent performances of bright color, complete chromatogram, good dyeing color fastness and the like, wherein the color fastness to sunlight and the color fastness to washing are particularly outstanding, and the vat dye is often used for dyeing protein fibers and the over-dyeing of cotton components in polyester-cotton blended fabrics. The vat dye leuco dyeing method is characterized in that the vat dye is converted into sodium salt of leuco through pre-reduction, the sodium salt is adsorbed by fibers in a dye bath, and then the sodium salt is oxidized to form water-insoluble dye lake which is fixed on the fibers, so that the advantage of the vat dye can be fully exerted. However, the leuco dyeing method in the prior art has the defects of faster fiber primary dyeing and easy flower dyeing. Meanwhile, for some high-performance nylon fibers with higher crystallinity, stronger hydrophobicity or poorer alkali resistance, the conventional vat dye dyeing method is adopted, so that the fibers with good dyeing performance are difficult to obtain, and the application of the vat dye in the high-performance nylon fibers is greatly limited.
The invention patent with the application number of CN201910246452.0 discloses a composite reducing agent and a reduction dyeing method. The composite reducing agent comprises 30-75 wt% of thiourea dioxide, 60-20 wt% of reducing sugar, and a chemical potential control agent: 10-5 wt% of at least one of sodium nitrite, acrylamide, furfural, cyclohexanone and trichloroacetic acid. The stable reduction system is formed by preparing the micro-colloid leuco sodium salt from the composite reducing agent and the vat dye, so that the fabric can be pretreated, grease and stains on the surface of the fiber are removed, the dye is gradually permeated and adsorbed, and the pretreatment and dyeing are combined into one.
In a document of 'dyeing by vat dye of bio-based nylon 56 fabric' published in a publication of 'printing and dyeing' in 2019, a vat dye leuco body dip dyeing method is adopted to dye the bio-based nylon 56 fabric, and research shows that the optimization process is as follows: 4 percent of dye mass fraction (omf), 10g/L of sodium hydrosulfite mass concentration, 40min of dyeing time, 12g/L of sodium hydroxide mass concentration and 80 ℃ of dyeing temperature; the dyed bio-based nylon 56 fabric has good fastness to rubbing, perspiration and soaping.
However, most of the above dyeing methods use chemical reagents to solve the problems. Therefore, in order to solve the problem of easy dyeing of high-performance nylon fibers which are difficult to dye, a nylon fiber dyeing method which has high dyeing efficiency and can improve the fiber dyeing phenomenon is needed.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a process for pad dyeing nylon fiber and protein powder.
In order to realize the aim, the invention provides a method for pad dyeing of nylon fiber and protein powder, which comprises the following steps:
s1, dye liquor preparation: adding vat dye into water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco solution to 40-90 ℃, stirring at the rotating speed of 150-250r/min for 5-15min, and adjusting the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier into the leuco acid solution, and stirring to prepare a vat dye solution;
s2, casing dyeing: firstly, putting protein powder with a preset proportion into a bath with the bath ratio of 1: (25-40) heating the vat dye liquor prepared in the step S1 to 35-45 ℃, stirring for 10-20min, then adding nylon fibers in a predetermined ratio, and dyeing the nylon fibers and the protein powder; after dyeing is finished, finishing the respective dyeing of the nylon fiber and the protein powder;
s3, post-processing: and taking out the dyed protein powder and the nylon fiber, putting the dyed protein powder and the nylon fiber in circulating water for washing, washing the floating color, separating the protein powder from the nylon fiber, and filtering the circulating water after separation to respectively obtain the dyed nylon fiber and the dyed protein powder.
Preferably, in the vat dye liquor obtained in step S1, the concentration of the vat dye is 4-10g/L, the concentration of the sodium hydroxide is 4-10g/L, the concentration of the thiourea dioxide is 4-10g/L, and the concentration of the carrier is 30-70 g/L.
Preferably, the carrier includes but is not limited to one or more of methyl formanilide, ethylene glycol phenyl ether and N-N-dimethyl acetamide.
Preferably, in the mixture of step S2, the mass ratio of the nylon fiber to the protein powder is 1:0.5-1: 1.5.
Preferably, the particle size of the protein powder is 1-5 μm.
Preferably, the nylon fiber includes, but is not limited to, one or more of nylon 6 fiber, nylon 66 fiber, nylon 56 fiber.
Preferably, the protein powder includes, but is not limited to, one or more of wool powder, silk powder and down powder.
Preferably, in the dyeing process of step S2, the dyeing start temperature is set to 30-50 ℃, the temperature is raised to 80-110 ℃ at a heating rate of 1-2 ℃/min, and the temperature is maintained for 40-80 min; then the temperature is reduced to below 50 ℃ at the cooling rate of 2-4 ℃/min.
Preferably, the vat dye is one or more of insoluble vat dyes.
Preferably, in step S1, the pH of the leuco acid solution is adjusted with glacial acetic acid.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a method for pad dyeing of nylon fiber and protein powder, which mixes two mutually independent materials to be dyed of the nylon fiber and the protein powder and puts the mixture into vat dye leuco acid dye liquor for pad dyeing, namely, the vat dye dyes the two materials of the nylon fiber and the protein powder in the same system respectively. The invention utilizes the small-size effect of high surface activity, high specific surface area and the like and the excellent performance of surface and interface effect of micro-nano superfine protein powder to ensure that the micro-nano superfine protein powder has excellent adsorption performance on the leuco acid of the vat dye, therefore, the protein powder can adsorb a great amount of the leuco acid of the vat dye in the leuco acid dye liquor of the vat dye to greatly reduce the concentration of the dye liquor and form a protein powder buffer system of the vat dye, the protein powder firstly adsorbs a great amount of the vat dye and then slowly releases the vat dye, thereby being beneficial to the slow and uniform dyeing process of nylon fibers, effectively avoiding the phenomena of uneven dyeing and dyeing of the nylon fibers caused by overhigh concentration and overhigh concentration change of the vat dye in the dyeing process, and obviously improving the dyeing efficiency of the nylon fibers. The mechanism is as follows:
1) in the preparation process of the vat dye solution, after mixing the vat dye with water, adding sodium hydroxide and thiourea dioxide, uniformly stirring, heating, generating urea and sulfinic acid by the thiourea dioxide in a heating and alkaline environment, and reducing the vat dye into leuco sodium salt by the sulfinic acid to obtain vat dye leuco solution; then adjusting the vat dye leuco body solution to an acid environment, adding a carrier into the acid environment to prepare the vat dye leuco acid dye solution, which is beneficial to adsorption and dye-uptake of protein powder in the subsequent process and formation of a protein powder buffer system of the vat dye;
2) in the process of the over dyeing, protein powder is added into a dye solution, and the mixture is stirred after being preheated at a low temperature, on one hand, the urea generated by the thiourea dioxide reaction can swell the protein powder, and a large amount of vat dye is adsorbed on the surface of the micro-nano protein powder and is fully absorbed after being stirred; on the other hand, as the temperature rises, due to the adsorbability and the dyeing property of the protein powder, the vat dye gradually enters the protein powder, most of the vat dye in the dye solution enters and is adsorbed on the protein powder, so that the concentration of the dye solution is greatly reduced, the nylon fiber is added, and the residual vat dye in the dye solution is slowly adsorbed on the surface of the nylon fiber;
3) when high-temperature dyeing is carried out, excessive carriers in the dye liquor generate swelling action on the nylon fibers under the action of heat, so that gaps among macromolecular chains of the nylon fibers are enlarged. At this time, since the internal channel of the nylon fiber is opened and the attraction of the carrier to the vat dye is stronger than that of water, the vat dye in the dye solution enters the inside of the nylon fiber under the guiding action of the carrier. Furthermore, the concentration of the vat dye in the dye liquor is reduced, because of the concentration difference, the vat dye adsorbed on the surface of the protein powder is gradually diffused to the dye liquor, and simultaneously, urea generated in the dye liquor by reaction can also generate a swelling effect on the nylon fiber, the vat dye is more easily guided into the nylon fiber by the synergistic effect of the carrier and the urea, and because of a dye liquor concentration buffer system formed by the adsorption and gradual release effects of the protein powder, the defects that the nylon fiber is fast in initial dyeing and easy to dye flowers in the dyeing process are overcome, the vat dye can not be fast adsorbed and enter the inside of the nylon fiber, the slow dyeing effect is achieved, and when the protein powder is over-dyed, the phenomena of uneven dyeing and flower dyeing of the nylon fiber are effectively improved.
2. According to the method for pad dyeing of nylon fibers and protein powder, the adopted superfine protein powder is prepared from wool short fibers, silk, down products and the like, one of the sources of the wool short fibers, the silk and the down products is a waste recycled material, waste of natural resources is reduced, and the requirements of sustainable development are met.
Detailed Description
The technical solutions of the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The invention provides a method for resist dyeing of nylon fiber and protein powder, which comprises the following steps:
s1, dye liquor preparation: adding vat dye into water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco solution to 40-90 ℃, stirring at the rotating speed of 150-250r/min for 5-15min, and adjusting the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier into the leuco acid solution, and stirring to prepare a vat dye solution;
s2, casing dyeing: putting protein powder in a predetermined ratio into a bath at a bath ratio of 1: (25-40) heating the vat dye solution prepared in the step S1 to 35-45 ℃, stirring for 10-20min, then adding nylon fibers in a predetermined ratio, and dyeing the nylon fibers and the protein powder; after dyeing is finished, finishing the respective dyeing of the nylon fiber and the protein powder;
s3, post-processing: and taking out the dyed protein powder and the nylon fiber, putting the dyed protein powder and the nylon fiber in circulating water for washing, washing the floating color, separating the protein powder from the nylon fiber, and filtering the circulating water after separation to respectively obtain the dyed nylon fiber and the dyed protein powder.
Preferably, in the vat dye solution of step S1, the concentration of the vat dye is 4-10g/L, the concentration of the sodium hydroxide is 4-10g/L, the concentration of the thiourea dioxide is 4-10g/L, and the concentration of the carrier is 30-70 g/L.
Preferably, the carrier includes but is not limited to one or more of methylformanilide, ethylene glycol phenyl ether and N-N-dimethylacetamide.
Preferably, in the mixture of step S2, the mass ratio of the nylon fiber to the protein powder is 1:0.5-1: 1.5.
Preferably, the particle size of the protein powder is 1-5 μm.
Preferably, the nylon fiber includes, but is not limited to, one or more of nylon 6 fiber, nylon 66 fiber, nylon 56 fiber.
Preferably, the protein powder includes, but is not limited to, one or more of wool powder, silk powder and down powder.
Preferably, in the dyeing procedure in the step S2, the dyeing starting temperature is set to be 30-50 ℃, the temperature is raised to 80-110 ℃ at the heating rate of 1-2 ℃/min, and the temperature is preserved for 40-80 min; then the temperature is reduced to below 50 ℃ at the cooling rate of 2-4 ℃/min.
Preferably, the vat dye is one or more of insoluble vat dyes.
Preferably, in step S1, the pH of the leuco acid solution is adjusted using glacial acetic acid.
The present invention is described in further detail below with reference to specific examples.
In the invention, a colori7 colorimeter is adopted to test the K/S value; the color fastness to sunlight is tested according to the standard GB/T8427 and 2008, color fastness to artificial light, xenon arc.
Example 1
The embodiment provides a method for top-dyeing high-strength nylon 66 fibers and wool powder, which comprises the following steps:
s1, dye liquor preparation: adding insoluble vat blue BC into distilled water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco solution to 90 ℃, stirring at the rotating speed of 250r/min for 15min, and adding glacial acetic acid to adjust the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier ethylene glycol phenyl ether into the leuco acid solution, and stirring to prepare a vat dye solution; in the vat dye liquor, the concentration of vat blue BC is 10g/L, the concentration of sodium hydroxide is 10g/L, the concentration of thiourea dioxide is 10g/L, and the concentration of ethylene glycol phenyl ether is 70 g/L;
s2, casing dyeing: putting wool powder in a predetermined proportion into the vat dye liquor prepared in the step S1 with the bath ratio of 1:40, heating to 45 ℃, stirring for 20min, then putting high-strength nylon 66 fiber in a predetermined proportion, dyeing the high-strength nylon 66 fiber and the wool powder, wherein the dyeing starting temperature is 30 ℃, heating to 110 ℃ at the heating rate of 2 ℃/min, and keeping the temperature for 80 min; then cooling to below 50 ℃ at a cooling rate of 4 ℃/min; after dyeing is finished, finishing the respective dyeing of the high-strength nylon 66 fiber and the wool powder; wherein the mass ratio of the high-strength nylon 66 fiber to the wool powder is 1:1.5, and the grain diameter of the wool powder is 1 micron;
s3, post-processing: and (4) taking out the high-strength nylon 66 fiber dyed by the vat dye and the wool powder dyed by the vat dye prepared in the step (S2), putting the high-strength nylon 66 fiber and the wool powder in circulating water for washing, washing floating color, separating the wool powder from the high-strength nylon 66 fiber, and filtering the circulating water after separation to respectively obtain the dyed high-strength nylon 66 fiber and the dyed wool powder.
Example 2
The embodiment provides a method for top-dyeing high-strength nylon 66 fibers and wool powder, which comprises the following steps:
s1, preparing a dye solution: adding insoluble vat blue BC into distilled water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco solution to 40 ℃, stirring at the rotating speed of 150r/min for 5min, and adding glacial acetic acid to adjust the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier ethylene glycol phenyl ether into the leuco acid solution, and stirring to prepare a vat dye solution; in the vat dye solution, the concentration of vat blue BC is 4g/L, the concentration of sodium hydroxide is 4g/L, the concentration of thiourea dioxide is 4g/L, and the concentration of ethylene glycol phenyl ether is 30 g/L;
s2, casing dyeing: putting wool powder in a preset ratio into the vat dye solution prepared in the step S1 with the bath ratio of 1:25, heating to 35 ℃, stirring for 10min, then putting high-strength nylon 66 fiber in the preset ratio, dyeing the high-strength nylon 66 fiber and the wool powder at the initial dyeing temperature of 30 ℃, heating to 110 ℃ at the heating rate of 1 ℃/min, and keeping the temperature for 40 min; then cooling to below 50 ℃ at a cooling rate of 2 ℃/min; after dyeing is finished, finishing the respective dyeing of the high-strength nylon 66 fiber and the wool powder; wherein the mass ratio of the high-strength nylon 66 fiber to the wool powder is 1:0.5, and the grain diameter of the wool powder is 5 microns;
s3, post-processing: and (4) taking out the high-strength nylon 66 fiber dyed by the vat dye and the wool powder dyed by the vat dye prepared in the step (S2), putting the high-strength nylon 66 fiber and the wool powder in circulating water for washing, washing floating color, separating the wool powder from the high-strength nylon 66 fiber, and filtering the circulating water after separation to respectively obtain the dyed high-strength nylon 66 fiber and the dyed wool powder.
Example 3
The embodiment provides a method for top-dyeing high-strength nylon 66 fibers and wool powder, which comprises the following steps:
s1, dye liquor preparation: adding insoluble vat blue BC into distilled water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco body solution; heating the leuco solution to 60 ℃, stirring at the rotating speed of 200r/min for 10min, and adding glacial acetic acid to adjust the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier ethylene glycol phenyl ether into the leuco acid solution, and stirring to prepare a vat dye liquor; in the vat dye solution, the concentration of vat blue BC is 6g/L, the concentration of sodium hydroxide is 6g/L, the concentration of thiourea dioxide is 6g/L, and the concentration of ethylene glycol phenyl ether is 40 g/L;
s2, casing dyeing: putting wool powder in a preset ratio into the vat dye solution prepared in the step S1 with a bath ratio of 1:30, heating to 40 ℃, stirring for 15min, then putting high-strength nylon 66 fiber in the preset ratio, dyeing the high-strength nylon 66 fiber and the wool powder at the initial dyeing temperature of 35 ℃, heating to 110 ℃ at a heating rate of 1.5 ℃/min, and keeping the temperature for 60 min; then cooling to below 50 ℃ at a cooling rate of 3 ℃/min; after dyeing is finished, finishing the respective dyeing of the high-strength nylon 66 fiber and the wool powder; wherein the mass ratio of the high-strength nylon 66 fiber to the wool powder is 1:1, and the grain diameter of the wool powder is 3 mu m;
s3, post-processing: and (4) taking out the high-strength nylon 66 fiber dyed by the vat dye and the wool powder dyed by the vat dye, prepared in the step (S2), washing the high-strength nylon 66 fiber and the wool powder in circulating water, washing the loose color, separating the wool powder from the high-strength nylon 66 fiber, and filtering the circulating water after separation to respectively obtain the dyed high-strength nylon 66 fiber and the dyed wool powder.
Example 4
The embodiment provides a method for top-dyeing high-strength nylon 66 fibers and wool powder, which comprises the following steps:
s1, dye liquor preparation: adding insoluble vat blue BC and insoluble vat yellow 3RT into distilled water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco solution to 60 ℃, stirring at the rotating speed of 200r/min for 10min, and adding glacial acetic acid to adjust the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier ethylene glycol phenyl ether into the leuco acid solution, and stirring to prepare a vat dye solution; in the vat dye solution, the concentration of vat blue BC is 3g/L, the concentration of vat yellow 3RT is 3g/L, the concentration of sodium hydroxide is 6g/L, the concentration of thiourea dioxide is 6g/L, and the concentration of ethylene glycol phenyl ether is 45 g/L;
s2, casing dyeing: putting wool powder in a preset ratio into the vat dye solution prepared in the step S1 with a bath ratio of 1:30, heating to 40 ℃, stirring for 15min, then putting high-strength nylon 66 fiber in the preset ratio, dyeing the high-strength nylon 66 fiber and the wool powder at the initial dyeing temperature of 35 ℃, heating to 110 ℃ at a heating rate of 1 ℃/min, and keeping the temperature for 60 min; then cooling to below 50 ℃ at a cooling rate of 3 ℃/min; after dyeing is finished, respectively dyeing the nylon 56 fiber and the wool powder; wherein the mass ratio of the high-strength nylon 66 fiber to the wool powder is 1:1, and the grain diameter of the wool powder is 3 mu m;
s3, post-processing: and (4) taking out the high-strength nylon 66 fiber dyed by the vat dye and the wool powder dyed by the vat dye prepared in the step (S2), putting the high-strength nylon 66 fiber and the wool powder in circulating water for washing, washing floating color, separating the wool powder from the high-strength nylon 66 fiber, and filtering the circulating water after separation to respectively obtain the dyed high-strength nylon 66 fiber and the dyed wool powder.
Comparative example 1
The difference from example 3 is that: the method for dyeing the high-strength nylon 66 fiber by adopting the traditional vat dye leuco acid dyeing method comprises the following steps:
s1, adding insoluble vat blue BC with the concentration of 6g/L into distilled water, stirring, adding sodium hydroxide with the concentration of 6g/L and thiourea dioxide with the concentration of 6g/L, heating to 60 ℃, stirring for 10min at 200r/min, adding glacial acetic acid, adjusting the pH value to 5-6, and preparing a vat dye solution;
s2, putting the high-strength nylon 66 fiber into the vat dye liquor according to a bath ratio of 1:30, wherein the dyeing starting temperature is 35 ℃, heating to 110 ℃ at a heating rate of 1 ℃/min, and keeping the temperature for 60 min; then cooling to below 50 ℃ at a cooling rate of 3 ℃/min, and taking out the dyed high-strength nylon 66 fiber;
and S3, washing the high-strength nylon 66 fiber dyed by the prepared vat dye with running water, and drying to obtain the dyed high-strength nylon 66 fiber.
Table 1 shows the performance parameters of examples 1 to 4 and comparative example 1
Examples 1-4 and comparative example 1 were analyzed in conjunction with table 1: the high-strength nylon 66 fibers prepared by the dyeing method provided by the invention in examples 1-4 have excellent K/S values, which are far higher than K/S values of fibers dyed by a conventional vat dye leuco acid dyeing method in a comparative example.
In addition, the light fastness of the high strength nylon 66 fibers prepared in examples 1-4 was greater than that of fibers dyed with the conventional vat dye, leuco acid. Therefore, compared with the traditional vat dye leuco acid dyeing method, the dyeing method provided by the invention can effectively improve the dyeing efficiency of the nylon fiber and has excellent light fastness.
Example 5
The embodiment provides a method for pad dyeing of nylon 6 fiber and silk powder, which comprises the following steps:
s1, dye liquor preparation: adding insoluble vat dye vat blue BC into distilled water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco body solution to 40 ℃, stirring at the rotating speed of 200r/min for 15min, and adding glacial acetic acid to adjust the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier methylformanilide into the leuco acid solution, and stirring to prepare a vat dye solution; in the vat dye solution, the concentration of the vat blue BC is 8g/L, the concentration of the sodium hydroxide is 8g/L, the concentration of the thiourea dioxide is 8g/L, and the concentration of the methylformanilide is 60 g/L;
s2, casing dyeing: firstly, silk powder with a preset ratio is placed into the vat dye solution prepared in the step S1 with a bath ratio of 1:30, the temperature is raised to 40 ℃, the mixture is stirred for 15min, then nylon 6 fiber with a preset ratio is placed, the dyeing starting temperature of the dyeing process of the nylon 6 fiber and the silk powder is 40 ℃, the temperature is raised to 80 ℃ at a heating rate of 1 ℃/min, and the temperature is kept for 60 min; then cooling to below 50 ℃ at a cooling rate of 3 ℃/min; after dyeing is finished, respectively dyeing the nylon 56 fiber and the silk powder; wherein the mass ratio of the nylon 56 fiber to the silk powder is 1:1, and the particle size of the silk powder is 3 mu m;
s3, post-processing: and (4) taking the nylon 6 fiber dyed by the vat dye and the silk powder dyed by the vat dye prepared in the step (S2), putting the nylon 6 fiber and the silk powder in circulating water for washing, cleaning and bleaching, separating the silk powder from the nylon 6 fiber, and filtering the circulating water after separation to respectively obtain the dyed nylon 6 fiber and the dyed silk powder.
The dyed nylon 6 fiber provided in example 5 had a K/S value of 8.34, silk powder of 3.15, and nylon 6 fiber of level 4 light fastness, and the dyed fabric was colorless.
Example 6
The embodiment provides a method for pad dyeing of nylon 56 fiber and down powder, which comprises the following steps:
s1, dye liquor preparation: adding insoluble vat dye vat blue BC into distilled water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco solution to 45 ℃, stirring at the rotating speed of 200r/min for 15min, and adding glacial acetic acid to adjust the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier N-N-dimethylacetamide into the leuco acid solution, and stirring to prepare a vat dye solution; in the vat dye solution, the concentration of vat blue BC is 8g/L, the concentration of sodium hydroxide is 8g/L, the concentration of thiourea dioxide is 8g/L, and the concentration of N-N-dimethylacetamide is 60 g/L;
s2, casing dyeing: putting down feather powder in a preset ratio into the vat dye solution prepared in the step S1 with the bath ratio of 1:30, heating to 40 ℃, stirring for 15min, then putting nylon 56 fiber in the preset ratio, dyeing the nylon 56 fiber and the down feather powder at the initial dyeing temperature of 40 ℃, heating to 90 ℃ at the heating rate of 1 ℃/min, and keeping the temperature for 60 min; then cooling to below 50 ℃ at a cooling rate of 3 ℃/min; after dyeing is finished, respectively dyeing the nylon 56 fiber and the down feather powder; wherein the mass ratio of the nylon 56 fiber to the down powder is 1:1, and the particle size of the wool powder is 3 mu m;
s3, post-processing: and (4) taking out the nylon 56 fiber dyed by the vat dye and the down feather powder dyed by the vat dye prepared in the step (S2), putting the down feather powder and the nylon 56 fiber into circulating water for washing, washing floating color, separating the down feather powder from the nylon 56 fiber, and filtering the circulating water after separation to respectively obtain the dyed nylon 56 fiber and the dyed down feather powder.
The dyed nylon 56 fiber provided in example 6 has a K/S value of 8.23, the down powder has a K/S value of 3.09, the nylon 56 fiber has a light fastness of grade 4, and the dyed fabric is colorless.
It should be noted that, as will be understood by those skilled in the art, in the process of the top-dressing dyeing provided by the present invention, the process parameter settings in the dyeing process can be adjusted according to actual conditions, and excellent dyeing effects can be achieved.
In conclusion, the invention provides a method for resist dyeing of nylon fiber and protein powder. Firstly, sequentially adding vat dye, sodium hydroxide, thiourea dioxide, glacial acetic acid and a carrier according to a preset concentration to prepare vat dye liquor; then adding the mixture of the nylon fiber and the protein powder into a dye solution for a chromatography dyeing process to finish the respective dye-uptake of the nylon fiber and the protein powder; and finally, placing the dyed nylon fiber and the dyed protein powder in circulating water for washing, washing and bleaching, separating the nylon fiber and the protein powder, and filtering the circulating water after separation to respectively obtain the dyed nylon fiber and the dyed protein powder. The over-dyeing method can remarkably improve the dyeing efficiency of the nylon fiber which is difficult to dye, effectively improves the dyeing phenomenon of the nylon fiber by utilizing the excellent adsorption performance and gradual release action of the protein powder to the vat dye while over-dyeing the protein powder, and the dyed nylon fiber and the protein powder have excellent light fastness.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (8)
1. A process for the resist dyeing of nylon fiber and protein powder is characterized in that: the method comprises the following steps:
s1, dye liquor preparation: adding vat dye into water according to a preset proportion, stirring, and then sequentially adding sodium hydroxide and thiourea dioxide to obtain a leuco solution; heating the leuco solution to 40-90 ℃, stirring at the rotating speed of 150-250r/min for 5-15min, and adjusting the pH value to 5-6 to obtain a leuco acid solution; finally, adding a carrier into the leuco acid solution, and stirring to prepare a vat dye solution;
s2, counter dyeing: firstly, putting protein powder with a preset proportion into a bath with the bath ratio of 1: (25-40) heating the vat dye solution prepared in the step S1 to 35-45 ℃, stirring for 10-20min, then adding nylon fibers in a predetermined ratio, and dyeing the nylon fibers and the protein powder; after dyeing is finished, finishing the respective dyeing of the nylon fiber and the protein powder;
s3, post-processing: taking out the dyed protein powder and the nylon fiber, putting the dyed protein powder and the nylon fiber in circulating water for washing, washing the floating color, separating the protein powder from the nylon fiber, and filtering the circulating water after separation to respectively obtain the dyed nylon fiber and the dyed protein powder;
the carrier is one or more of methyl formanilide, ethylene glycol phenyl ether and N-N-dimethylacetamide;
the vat dye is one or more of insoluble vat dyes.
2. The counter dyeing method of nylon fiber and protein powder as claimed in claim 1, characterized in that: in the vat dye solution of step S1, the concentration of the vat dye is 4-10g/L, the concentration of the sodium hydroxide is 4-10g/L, the concentration of the thiourea dioxide is 4-10g/L, and the concentration of the carrier is 30-70 g/L.
3. The counter dyeing method of nylon fiber and protein powder as claimed in claim 1, characterized in that: in the step S2 mixture, the mass ratio of the nylon fiber to the protein powder is 1:0.5-1: 1.5.
4. The topping dyeing method of nylon fiber and protein powder according to claim 3, characterized in that: the particle size of the protein powder is 1-5 μm.
5. The topping dyeing method of nylon fiber and protein powder according to claim 3, characterized in that: the nylon fiber is one or more of nylon 6 fiber, nylon 66 fiber and nylon 56 fiber.
6. The topping dyeing method of nylon fiber and protein powder according to claim 4, characterized in that: the protein powder is one or more of wool powder, silk powder and down powder.
7. The counter dyeing method of nylon fiber and protein powder as claimed in claim 1, characterized in that: in the dyeing procedure of the step S2, the dyeing starting temperature is set to be 30-50 ℃, the temperature is increased to 80-110 ℃ at the heating rate of 1-2 ℃/min, and the temperature is kept for 40-80 min; then the temperature is reduced to below 50 ℃ at the cooling rate of 2-4 ℃/min.
8. The counter dyeing method of nylon fiber and protein powder as claimed in claim 1, characterized in that: in step S1, the pH of the leuco acid solution is adjusted with glacial acetic acid.
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