CN111926593A - Double-medium circulating dyeing method with high dye-uptake and color fastness - Google Patents
Double-medium circulating dyeing method with high dye-uptake and color fastness Download PDFInfo
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- CN111926593A CN111926593A CN202010774752.9A CN202010774752A CN111926593A CN 111926593 A CN111926593 A CN 111926593A CN 202010774752 A CN202010774752 A CN 202010774752A CN 111926593 A CN111926593 A CN 111926593A
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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
- D06P1/94—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 dyes dissolved in solvents which are in the supercritical state
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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
- D06P1/90—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 dyes dissolved in organic solvents or aqueous emulsions thereof
- D06P1/92—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 dyes dissolved in organic solvents or aqueous emulsions thereof in organic solvents
- D06P1/922—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 dyes dissolved in organic solvents or aqueous emulsions thereof in organic solvents hydrocarbons
- D06P1/924—Halogenated hydrocarbons
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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
- D06P1/90—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 dyes dissolved in organic solvents or aqueous emulsions thereof
- D06P1/92—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 dyes dissolved in organic solvents or aqueous emulsions thereof in organic solvents
- D06P1/928—Solvents other than hydrocarbons
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Abstract
The invention relates to a double-medium circulating dyeing method with high dye-uptake and color fastness, belonging to the field of fabric dyeing. The method comprises the following steps: pre-swelling the fiber in a pad dyeing solution, and padding the pre-swelled fiber; putting the padded fiber into a supercritical carbon dioxide dyeing kettle, and dyeing the padded fiber; putting the dyed fiber into a cleaning tank and cleaning the fiber in a solvent of a pad dyeing solution; and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, and drying the cleaned fiber. The method of the invention ensures high color depth and small color difference of dyed fiber, and thoroughly avoids the problems of dye hydrolysis, high solvent consumption, large circulation difficulty and the like.
Description
Technical Field
The invention relates to a double-medium circulating dyeing method with high dye-uptake and color fastness, belonging to the field of fabric dyeing.
Background
The traditional dyeing method of the fiber takes water as a medium, and the fiber is dyed by adding a large amount of dye, salt and auxiliary agent in the dyeing process. The mode not only causes the dilemma of water fight between the printing and dyeing industry and people and livestock, but also causes serious pollution to the environment due to the inactivated dye, salt and auxiliary agent contained in the dyeing wastewater, and restricts the sustainable development of the textile printing and dyeing industry.
Non-aqueous medium dyeing is considered to be a novel dyeing and finishing technology which can greatly reduce the wastewater discharge in the printing and dyeing industry. There are two non-aqueous media dyeing techniques commonly used today: one is supercritical carbon dioxide anhydrous dyeing technology which takes supercritical carbon dioxide as a medium; the second is a solvent dyeing technique which takes organic solvents (proton type and non-proton type) as a medium. The medium of the supercritical carbon dioxide dyeing technology is nonpolar carbon dioxide, and has poor compatibility with fibers (such as cotton, silk and wool) with large molecular polarity and reactive dyes, and the defects of low color depth, large color difference and the like exist after dyeing. Although the defects of low color depth and large color difference of supercritical carbon dioxide anhydrous dyeing are overcome by solvent dyeing, the used solvent is large in using amount, large in recycling difficulty, large in salt requirement, high in energy consumption and high in dyeing operation cost.
Disclosure of Invention
The present invention solves the above problems by a new method.
The invention provides a double-medium circulating dyeing method with high dye-uptake and color fastness, which comprises the following steps: pre-swelling the fiber in pad dyeing solution at 5-60 ℃ for 30s-24h, and padding the pre-swelled fiber under 0.01-0.7 MPa; placing the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 40-140 deg.C and 12-35MPa for 30-150min, and releasing pressure; putting the dyed fiber into a cleaning tank, and cleaning the fiber in a solvent of a pad dyeing solution at the cleaning temperature of 0-45 ℃; placing the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber at 40-140 deg.C and 12-35MPa for 5-60min, and releasing pressure.
According to the color fastness to soaping of GB/T3921-: and (3) evaluating the color fastness to home and commercial washing in the color fastness test of cotton and viscose fibers and GB/T12490-. The result shows that the rubbing color fastness and the washing color fastness of the dyed fabric can reach 4 to 5 grades, and the color fastness of the dyed fabric is not obviously different from that of cotton fiber dyed by the same dye and taking water as a medium.
The invention preferably selects the fiber as natural cellulose fiber, natural protein fiber, regenerated fiber, synthetic fiber or blended fiber.
According to the invention, the natural cellulose fiber is preferably cotton fiber, bamboo fiber or flax fiber.
According to the invention, the natural protein fibers are silk fibers or wool fibers.
The regenerated fiber is preferably tencel fiber, modal fiber, viscose fiber, cuprammonium fiber or acetate fiber.
The invention preferably selects the synthetic fiber as terylene, chinlon, acrylic fiber, polyvinyl fiber, spandex or polyolefin stretch yarn.
The pad dyeing solution preferably comprises dye, alkali and solvent.
The dye is at least one of reactive dye, disperse dye, cationic dye, direct dye and acid dye; the concentration of the dye is 1-100 g/L.
In the invention, preferably, the alkali is at least one of potassium carbonate, sodium carbonate, methylamine, urea, ethylamine, ethylenediamine, dimethylamine, triethylene diamine, trimethylamine, triethylamine, pyridine, potassium hydroxide, sodium hydroxide and ammonium hydroxide; the concentration of the alkali is 0-100 g/L.
The invention preferably selects the solvent as one, two or three of dimethyl sulfoxide, N-dimethylformamide, dimethylacetamide, methanol, ethanol, glycol, acetone, dichloromethane and trichloromethane; when the two solvents are used, the volume ratio of the two solvents is 10-90: 90-10 parts of; when the number of the solvents is three, any two solvents are mixed according to the volume ratio of 10-90: 90-10, and adding a third solvent, wherein the volume ratio of the third solvent to the mixture of the first two solvents is 10-90: 90-10.
Preferably, the method comprises the following steps: the solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is brought into the separation kettle by carbon dioxide, and the separated solvent enters a cleaning tank to clean the dyed fiber; filtering the cleaned solvent to remove insoluble impurities, feeding the solvent into a liquid preparation tank, analyzing the contents of the dye and the alkali in the filtered solvent in the liquid preparation tank, supplementing the dye and the alkali to the initial concentration, and mixing the dye and the alkali into the pad dyeing solution.
Preferably, the method comprises the following steps: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain solvent, the carbon dioxide enters the separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
The invention has the beneficial effects that:
the method firstly utilizes the good heat transfer performance of the supercritical carbon dioxide to heat the solvent containing the dye and the fiber, ensures the full reaction of the dye and the fiber, and then utilizes the good mass transfer performance of the supercritical carbon dioxide to separate the solvent from the fiber, so that the solvent can be effectively reused.
Compared with the prior art, the method disclosed by the invention can ensure high color depth and small color difference of the dyed fiber, and simultaneously thoroughly avoid the problems of dye hydrolysis, high solvent usage amount, high circulation difficulty and the like, thereby realizing complete utilization of the dye and low energy consumption and circulation use of the solvent, and really realizing low-cost medium circulation utilization on the basis of zero emission of anhydrous dyeing.
Detailed Description
The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way.
Example 1
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding active uncinata kalimeris B-BGFN and potassium hydroxide into a mixed solvent, and fully dissolving at 30 ℃, wherein: the concentration of the active Cuilan B-BGFN is 25g/L, the concentration of the potassium hydroxide is 5g/L, and the mixed solvent is dimethyl sulfoxide and ethanol according to the volume ratio of 1: 1, mixing;
pad dyeing of pure cotton fiber: pre-swelling the fiber in a pad dyeing solution at 30 ℃ for 2min, and padding the pre-swelled fiber under 0.1 MPa;
dyeing pure cotton fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 90 ℃ and 20MPa for 60min, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure release;
cleaning pure cotton fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 30 ℃;
drying pure cotton fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 10min at 40 ℃ and 12MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into the separation kettle by carbon dioxide, the separated mixed solvent enters a washing tank to wash the dyed fiber, the washed mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of active turquoise blue B-BGFN and potassium hydroxide in the filtered mixed solvent is analyzed in the liquid preparation tank, then the concentration of the active turquoise blue B-BGFN is supplemented to 25g/L and the concentration of the potassium hydroxide is supplemented to 5g/L, and then the active turquoise blue B-BGFN and the potassium hydroxide are mixed into a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 2
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding active golden yellow BPF, urea and potassium hydroxide into a mixed solvent, and fully dissolving at 25 ℃, wherein: the concentration of the active golden yellow BPF is 10g/L, the concentration of urea is 5g/L, the concentration of potassium hydroxide is 5g/L, and the mixed solvent is dimethyl sulfoxide and ethanol according to the volume ratio of 1: 5, mixing;
padding the bamboo fiber: pre-swelling the fiber in a pad dyeing solution at 25 ℃ for 2min, and padding the pre-swelled fiber under 0.2 MPa;
dyeing the bamboo fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 95 ℃ and 24MPa for 60min, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure release;
cleaning bamboo fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 30 ℃;
drying the bamboo fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 15min at 60 ℃ and 26MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into a separation kettle by carbon dioxide, the separated mixed solvent enters a cleaning tank to clean the dyed fiber, the cleaned mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of active golden yellow BPF, urea and potassium hydroxide in the filtered mixed solvent is analyzed in the liquid preparation tank, then the concentration of the active golden yellow BPF is supplemented to 10g/L, the concentration of the urea is supplemented to 5g/L and the concentration of the potassium hydroxide is supplemented to 5g/L, and then the mixed solvent is mixed into a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 3
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding urea and sodium hydroxide into a mixed solvent, fully dissolving at 40 ℃, cooling to 20 ℃, adding brilliant red E-BA into the mixed solvent, and fully dissolving, wherein: the concentration of the beautiful brilliant red E-BA is 5g/L, the concentration of the urea is 60g/L, the concentration of the sodium hydroxide is 5g/L, and the mixed solvent is dimethyl sulfoxide, glycol and ethanol according to the volume ratio of 2: 1: 1, mixing;
and (3) pad dyeing of flax fibers: pre-swelling the fiber in a pad dyeing solution at 20 ℃ for 3min, and padding the pre-swelled fiber under 0.5 MPa;
dyeing flax fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 120min at 40 ℃ and 20MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning flax fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 20 ℃;
drying the flax fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 5min at 20 ℃ and 30MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is brought into a separation kettle by carbon dioxide, the separated mixed solvent enters a washing tank to wash the dyed fiber, the washed mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of brilliant red E-BA, urea and sodium hydroxide in the filtered mixed solvent is analyzed in the liquid preparation tank, then the concentration of the brilliant red E-BA is supplemented to 5g/L, the concentration of the urea is supplemented to 60g/L and the concentration of the sodium hydroxide is supplemented to 5g/L, and then the mixture is mixed into a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 4
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding reactive brilliant blue KN-R and methylamine into a mixed solvent, and fully dissolving at 25 ℃, wherein: the concentration of the active brilliant blue KN-R is 30g/L, the concentration of methylamine is 10g/L, and the mixed solvent is dimethyl sulfoxide, dimethylacetamide and ethanol according to the volume ratio of 1: 1: 3, mixing;
silk fiber pad dyeing: pre-swelling the fiber in a pad dyeing solution at 25 ℃ for 3min, and padding the pre-swelled fiber under 0.7 MPa;
silk fiber dyeing: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 80min at 70 ℃ and 20MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
silk fiber cleaning: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 25 ℃;
drying the silk fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 15min at 40 ℃ and 30MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into a separation kettle by carbon dioxide, the separated mixed solvent enters a washing tank to wash the dyed fiber, the washed mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of active brilliant blue KN-R and methylamine in the filtered mixed solvent is analyzed in the liquid preparation tank, then the concentration of the active brilliant blue KN-R is supplemented to 30g/L and the concentration of the methylamine is supplemented to 10g/L, and then the mixed solvent is mixed into a padding solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 5
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding reactive brilliant blue KN-R and sodium carbonate into N, N-dimethylformamide, and fully dissolving at 45 ℃, wherein: the concentration of the reactive brilliant blue KN-R is 100g/L, and the concentration of the sodium carbonate is 100 g/L;
pad dyeing of wool fibers: pre-swelling the fiber in a pad dyeing solution at 45 ℃ for 1h, and padding the pre-swelled fiber under 0.7 MPa;
dyeing wool fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 150min at 80 ℃ and 35MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
wool fiber cleaning: placing the dyed fiber into a cleaning tank, and cleaning in N, N-dimethylformamide at the temperature of 45 ℃;
drying the wool fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 15min at 60 ℃ and 35MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
Recycling the N, N-dimethylformamide: carrying N, N-dimethylformamide on fibers in a supercritical carbon dioxide dyeing kettle and a supercritical carbon dioxide drying kettle into a separation kettle by carbon dioxide, cleaning the dyed fibers by the separated N, N-dimethylformamide in a cleaning tank, filtering the cleaned N, N-dimethylformamide to remove insoluble impurities, putting the fibers into a liquid preparation tank, analyzing the contents of active brilliant blue KN-R and sodium carbonate in the filtered N, N-dimethylformamide in the liquid preparation tank, supplementing the concentration of the active brilliant blue KN-R to 100g/L and the concentration of the sodium carbonate to 100g/L, and then mixing the active brilliant blue KN-R and the sodium carbonate into a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain carbon dioxide of N, N-dimethylformamide and enter the separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 6
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding active red BES and sodium hydroxide into dimethyl sulfoxide, and fully dissolving at 30 ℃, wherein: the concentration of the active red BES is 10g/L, and the concentration of the sodium hydroxide is 6 g/L;
tencel fiber pad dyeing: pre-swelling the fiber in a pad dyeing solution at 40 ℃ for 1h, and padding the pre-swelled fiber under 0.7 MPa;
dyeing the tencel fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 80min at 105 ℃ and 26MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning tencel fiber: placing the dyed fiber into a cleaning tank and cleaning the fiber in dimethyl sulfoxide, wherein the cleaning temperature is 45 ℃;
drying the tencel fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 20min at 60 ℃ and 30MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
And (3) recycling dimethyl sulfoxide: and (2) bringing dimethyl sulfoxide on fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle into a separation kettle by carbon dioxide, cleaning the dyed fibers by the separated dimethyl sulfoxide in a cleaning tank, filtering the cleaned dimethyl sulfoxide to remove insoluble impurities, putting the filtered dimethyl sulfoxide into a liquid preparation tank, analyzing the contents of active red BES and sodium hydroxide in the filtered dimethyl sulfoxide in the liquid preparation tank, supplementing the concentration of the active red BES to 10g/L and the concentration of the sodium hydroxide to 6g/L, and mixing the active red BES and the sodium hydroxide into a padding solution.
And (3) recycling carbon dioxide: and the carbon dioxide containing dimethyl sulfoxide in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle enters a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 7
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding activated orange EX-D and potassium hydroxide into a mixed solvent, and fully dissolving at 30 ℃, wherein: the concentration of the active orange EX-D is 20g/L, the concentration of the potassium hydroxide is 3g/L, and the mixed solvent is dimethyl sulfoxide and methanol in a volume ratio of 1: 3, mixing;
modal fiber pad dyeing: pre-swelling the fiber in a pad dyeing solution at 30 ℃ for 1h, and padding the pre-swollen fiber under 0.2 MPa;
dyeing modal fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 100 ℃ and 24MPa for 60min, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure release;
cleaning modal fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 30 ℃;
drying modal fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 10min at 40 ℃ and 28MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into a separation kettle by carbon dioxide, the separated mixed solvent enters a washing tank to wash the dyed fiber, the washed mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of active orange EX-D and potassium hydroxide in the filtered mixed solvent is analyzed in the liquid preparation tank, the concentration of the active orange EX-D is supplemented to 20g/L and the concentration of the potassium hydroxide is supplemented to 3g/L, and then the active orange EX-D and the potassium hydroxide are mixed into the pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 8
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding active turquoise blue CGF, urea and potassium hydroxide into a mixed solvent, and fully dissolving at 30 ℃, wherein: the concentration of the active turquoise blue CGF is 20g/L, the concentration of urea is 30g/L, the concentration of potassium hydroxide is 3g/L, and the volume ratio of the mixed solvent of N, N-dimethylformamide and methanol is 1: 1, mixing;
pad dyeing viscose fibers: pre-swelling the fiber in a pad dyeing solution at 30 ℃ for 1h, and padding the pre-swollen fiber under 0.2 MPa;
dyeing viscose fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 70 ℃ and 24MPa for 60min, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure release;
cleaning viscose fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 30 ℃;
drying viscose fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 10min at 30 ℃ and 35MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into a separation kettle by carbon dioxide, the separated mixed solvent enters a washing tank to wash the dyed fiber, the washed mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of active turquoise blue CGF, urea and potassium hydroxide in the filtered mixed solvent is analyzed in the liquid preparation tank, then the concentration of the active turquoise blue CGF is supplemented to 20g/L, the concentration of the urea is supplemented to 30g/L and the concentration of the potassium hydroxide is supplemented to 3g/L, and then the active turquoise blue CGF, the urea and the potassium hydroxide are mixed into a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 9
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding a reactive dye Sumifix HF, urea and methylamine into the mixed solvent, and fully dissolving at 30 ℃, wherein: the concentration of a reactive dye Sumifix HF is 20g/L, the concentration of urea is 30g/L, the concentration of methylamine is 10g/L, and the volume ratio of a mixed solvent of N, N-dimethylformamide and methanol is 1: 1, mixing;
pad dyeing of copper ammonia fiber: pre-swelling the fiber in a pad dyeing solution at 30 ℃ for 1h, and padding the pre-swollen fiber under 0.2 MPa;
dyeing the copper ammonia fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 120 ℃ and 24MPa for 60min, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure release;
cleaning copper ammonia fiber: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 45 ℃;
drying the copper ammonia fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 20min at 40 ℃ and 30MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into a separation kettle by carbon dioxide, the separated mixed solvent enters a washing tank to wash the dyed fiber, the washed mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of active dyes Sumifix HF, urea and methylamine in the filtered mixed solvent is analyzed in the liquid preparation tank, then the concentration of the active dyes Sumifix HF is supplemented to 20g/L, the concentration of the urea is supplemented to 30g/L and the concentration of the methylamine is supplemented to 10g/L, and then the active dyes Sumifix HF, the urea and the methylamine are mixed into a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 10
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding dispersed red jade SE-GFL and urea into a mixed solvent, and fully dissolving at 40 ℃, wherein: the concentration of the disperse ruby SE-GFL is 20g/L, the concentration of urea is 50g/L, and the mixed solvent is dimethyl sulfoxide and dimethylacetamide according to the volume ratio of 1: 1, mixing;
pad dyeing of acetate fiber: pre-swelling the fiber in a pad dyeing solution at 30 ℃ for 1h, and padding the pre-swollen fiber under 0.4 MPa;
dyeing acetate fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 120min at 85 ℃ and 30MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning acetate fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 40 ℃;
drying acetate fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 20min at 40 ℃ and 30MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into a separation kettle by carbon dioxide, the separated mixed solvent enters a cleaning tank to clean the dyed fiber, the cleaned mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the SE-GFL and the urea content of the dispersed ruby in the filtered mixed solvent are analyzed in the liquid preparation tank, the concentration of the dispersed ruby SE-GFL is supplemented to 20g/L and the concentration of the urea is supplemented to 50g/L, and then the dispersed ruby SE-GFL is mixed into the padding solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 11
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding disperse red S-R and urea into dimethyl sulfoxide, and fully dissolving at 40 ℃, wherein: the concentration of disperse red S-R is 15g/L, and the concentration of urea is 60 g/L;
pad dyeing of polyester fiber: pre-swelling the fiber in a pad dyeing solution at 50 ℃ for 1h, and padding the pre-swelled fiber under 0.5 MPa;
dyeing polyester fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 90min at 130 ℃ and 24MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning polyester fibers: placing the dyed fiber into a cleaning tank and cleaning the fiber in dimethyl sulfoxide, wherein the cleaning temperature is 50 ℃;
drying the polyester fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 10min at 30 ℃ and 35MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
And (3) recycling dimethyl sulfoxide: and (2) bringing dimethyl sulfoxide on fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle into a separation kettle by carbon dioxide, cleaning the dyed fibers by the separated dimethyl sulfoxide in a cleaning tank, filtering the cleaned dimethyl sulfoxide to remove insoluble impurities, putting the filtered dimethyl sulfoxide into a liquid preparation tank, analyzing the contents of disperse red S-R and urea in the filtered dimethyl sulfoxide in the liquid preparation tank, supplementing the concentration of the disperse red S-R to 15g/L and the concentration of the urea to 60g/L, and mixing the disperse red S-R and the urea into a padding solution.
And (3) recycling carbon dioxide: and the carbon dioxide containing dimethyl sulfoxide in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle enters a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 12
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding acid red 52 and urea into dimethyl acetamide, and fully dissolving at 35 ℃, wherein: the concentration of the acid red 52 is 20g/L, and the concentration of the urea is 5 g/L;
pad dyeing of polyamide fiber: pre-swelling the fiber in a pad dyeing solution at 35 ℃ for 30min, and padding the pre-swelled fiber under 0.2 MPa;
dyeing polyamide fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 30min at 100 ℃ and 27MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning polyamide fiber: putting the dyed fiber into a cleaning tank, and cleaning the fiber in dimethylacetamide at the cleaning temperature of 35 ℃;
drying the polyamide fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 10min at 20 ℃ and 35MPa, releasing pressure, taking out the fiber from the supercritical carbon dioxide drying kettle, and finishing dyeing.
And (3) recycling dimethylacetamide: the method comprises the following steps of bringing dimethylacetamide on fibers in a supercritical carbon dioxide dyeing kettle and a supercritical carbon dioxide drying kettle into a separation kettle by carbon dioxide, enabling the separated dimethylacetamide to enter a cleaning tank to clean the dyed fibers, filtering the cleaned dimethylacetamide to remove insoluble impurities, entering a liquid preparation tank, analyzing the acid red 52 and urea content in the filtered dimethylacetamide in the liquid preparation tank, supplementing the acid red 52 concentration to 20g/L and the urea concentration to 5g/L, and mixing the acid red 52 concentration and the urea concentration into a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain carbon dioxide of dimethylacetamide and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 13
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding cation peach red FG and urea into dimethyl sulfoxide, and fully dissolving at 30 ℃, wherein: the concentration of cation pink FG is 10g/L, and the concentration of urea is 10 g/L;
pad dyeing of acrylic fibers: pre-swelling the fiber in a pad dyeing solution at 35 ℃ for 30min, and padding the pre-swelled fiber under 0.2 MPa;
dyeing acrylic fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 90min at 100 ℃ and 28MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning acrylic fibers: placing the dyed fiber into a cleaning tank and cleaning the fiber in dimethyl sulfoxide, wherein the cleaning temperature is 35 ℃;
drying acrylic fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 15min at 25 ℃ and 28MPa, releasing pressure, taking out the fiber from the supercritical carbon dioxide drying kettle, and finishing dyeing.
And (3) recycling dimethyl sulfoxide: and (2) bringing dimethyl sulfoxide on fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle into a separation kettle by carbon dioxide, cleaning the dyed fibers by the separated dimethyl sulfoxide in a cleaning tank, filtering the cleaned dimethyl sulfoxide to remove insoluble impurities, putting the filtered dimethyl sulfoxide into a liquid preparation tank, analyzing the contents of cationic peach red FG and urea in the filtered dimethyl sulfoxide in the liquid preparation tank, supplementing the cationic peach red FG concentration to 10g/L and the urea concentration to 10g/L, and mixing the cationic peach red FG concentration and the urea concentration into a padding solution.
And (3) recycling carbon dioxide: and the carbon dioxide containing dimethyl sulfoxide in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle enters a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 14
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding disperse red 3B into ethanol, and fully dissolving at 35 ℃, wherein: the concentration of disperse red 3B is 10 g/L;
dyeing polyvinyl chloride fiber by padding: pre-swelling the fiber in a pad dyeing solution at 25 ℃ for 10min, and padding the pre-swelled fiber under 0.1 MPa;
dyeing polyvinyl chloride fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 95 ℃ and 28MPa for 60min, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure release;
cleaning polyvinyl chloride fiber: cleaning the dyed fiber in a cleaning tank in ethanol at the cleaning temperature of 35 ℃;
drying polyvinyl chloride fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 10min at 20 ℃ and 35MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained fiber, wherein the results are shown in table 1.
And (3) recycling ethanol: ethanol on fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is brought into the separation kettle by carbon dioxide, the separated ethanol enters a cleaning tank to clean the dyed fibers, the cleaned ethanol is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of disperse red 3B in the filtered ethanol is analyzed in the liquid preparation tank, and then the disperse red 3B is added into the pad dyeing solution after the concentration of the disperse red 3B is supplemented to 20 g/L.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain ethanol, the carbon dioxide enters the separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 15
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding disperse fluorescent yellow 8GFF into ethanol, and fully dissolving at 25 ℃, wherein: the concentration of the disperse fluorescent yellow 8GFF is 5 g/L;
and (3) vinylon fiber pad dyeing: pre-swelling the fiber in a pad dyeing solution at 25 ℃ for 10min, and padding the pre-swelled fiber under 0.3 MPa;
dyeing vinylon fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 50min at 90 ℃ and 20MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning vinylon fibers: putting the dyed fiber into a cleaning tank, and cleaning in ethanol at the cleaning temperature of 25 ℃;
and (3) drying vinylon fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 15min at 20 ℃ and 30MPa, releasing pressure, taking out the fiber from the supercritical carbon dioxide drying kettle, and finishing dyeing.
And (3) recycling ethanol: ethanol on fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is brought into the separation kettle by carbon dioxide, the separated ethanol enters a cleaning tank to clean the dyed fibers, the cleaned ethanol is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of the disperse fluorescent yellow 8GFF in the filtered ethanol is analyzed in the liquid preparation tank, and then the disperse fluorescent yellow 8GFF is mixed into the pad dyeing solution after the concentration is supplemented to 5 g/L.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain ethanol, the carbon dioxide enters the separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 16
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: disperse blue 2BLN was added to methanol and dissolved well at 25 ℃, where: the concentration of disperse blue 2BLN is 30 g/L;
pad dyeing of spandex fiber: pre-swelling the fiber in a pad dyeing solution at 25 ℃ for 1h, and padding the pre-swelled fiber under 0.5 MPa;
dyeing spandex fibers: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 50min at 100 ℃ and 24MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning spandex fibers: putting the dyed fiber into a cleaning tank, and cleaning in methanol at the cleaning temperature of 25 ℃;
drying spandex fibers: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 20min at 25 ℃ and 28MPa, releasing pressure, taking the fiber out of the supercritical carbon dioxide drying kettle, dyeing, and testing the color fastness of the obtained polyvinyl chloride fiber, wherein the results are shown in table 1.
And (3) recycling the methanol: methanol on fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is brought into the separation kettle by carbon dioxide, the separated methanol enters a cleaning tank to clean the dyed fibers, the cleaned methanol is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of disperse blue 2BLN in the filtered methanol is analyzed in the liquid preparation tank, and then the concentration of the disperse blue 2BLN is supplemented to 30g/L and then mixed into pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain methanol, the carbon dioxide enters the separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 17
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding alkali-resistant disperse red APL, active bright red BPF, urea and potassium hydroxide into a mixed solvent, and fully dissolving at 30 ℃, wherein: the concentration of alkali-resistant disperse red APL is 10g/L, the concentration of active bright red BPF is 10g/L, the concentration of urea is 30g/L, the concentration of potassium hydroxide is 3g/L, and the mixed solvent is dimethyl sulfoxide and methanol according to the volume ratio of 1: 5, mixing;
pad dyeing of polyester/cotton blended fiber: pre-swelling the fiber in a pad dyeing solution at 30 ℃ for 30min, and padding the pre-swelled fiber under 0.3 MPa;
dyeing the polyester/cotton blended fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 110 ℃ and 26MPa for 60min, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure release;
cleaning the polyester/cotton blended fiber: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 30 ℃;
drying the polyester/cotton blended fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 20min at 25 ℃ and 35MPa, releasing pressure, taking out the fiber from the supercritical carbon dioxide drying kettle, and finishing dyeing.
The mixed solvent is recycled: carrying the mixed solvent on the fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle into a separation kettle by carbon dioxide, cleaning the dyed fibers by the separated mixed solvent in a cleaning tank, filtering the cleaned mixed solvent to remove insoluble impurities, entering a liquid preparation tank, analyzing the contents of alkali-resistant disperse red APL, active bright red BPF, urea and potassium hydroxide in the filtered mixed solvent in the liquid preparation tank, supplementing the concentration of the alkali-resistant disperse red APL to 10g/L, supplementing the concentration of the active bright red BPF to 10g/L, supplementing the concentration of the urea to 30g/L and the concentration of the potassium hydroxide to 3g/L, and then mixing the urea with a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 18
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding activated red M-3BE, urea and potassium hydroxide into a mixed solvent, and fully dissolving at 25 ℃, wherein: the concentration of active red M-3BE is 20g/L, the concentration of urea is 60g/L, the concentration of potassium hydroxide is 5g/L, and the mixed solvent is dimethyl sulfoxide and ethanol according to the volume ratio of 1: 3, mixing;
pad dyeing of cotton/viscose blended fiber: pre-swelling the fiber in a pad dyeing solution at 40 ℃ for 15min, and padding the pre-swelled fiber under 0.1 MPa;
dyeing cotton/viscose blended fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 80min at 90 ℃ and 26MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning cotton/viscose blended fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 40 ℃;
drying the cotton/viscose blended fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 15min at 15 ℃ and 30MPa, releasing pressure, taking out the fiber from the supercritical carbon dioxide drying kettle, and finishing dyeing.
The mixed solvent is recycled: the mixed solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is carried into a separation kettle by carbon dioxide, the separated mixed solvent enters a washing tank to wash the dyed fiber, the washed mixed solvent is filtered to remove insoluble impurities and enters a liquid preparation tank, the content of active red M-3BE, urea and potassium hydroxide in the filtered mixed solvent is analyzed in the liquid preparation tank, then the concentration of the active red M-3BE is supplemented to 20g/L, the concentration of the urea is supplemented to 60g/L and the concentration of the potassium hydroxide is supplemented to 5g/L, and then the mixed solvent is mixed into the pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
Example 19
A double-medium circulation dyeing method with high dye-uptake and color fastness comprises the following steps:
preparing a pad dyeing solution: adding alkali-resistant disperse blue APH, active brilliant blue BPF, urea and sodium carbonate into a mixed solvent, and fully dissolving at 25 ℃, wherein: the concentration of alkali-resistant disperse blue APH is 30g/L, the concentration of active brilliant blue BPF is 30g/L, the concentration of urea is 20g/L, the concentration of sodium carbonate is 20g/L, and the volume ratio of a mixed solvent of dimethyl sulfoxide and ethanol is 1: 2, mixing;
pad dyeing of wool/polyester blended fiber: pre-swelling the fiber in a pad dyeing solution at 35 ℃ for 30min, and padding the pre-swelled fiber under 0.2 MPa;
dyeing the wool/polyester blended fiber: putting the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber for 80min at 100 ℃ and 24MPa, and taking out the fiber from the supercritical carbon dioxide dyeing kettle after pressure relief;
cleaning wool/polyester blended fibers: putting the dyed fiber into a cleaning tank, and cleaning in the mixed solvent at the cleaning temperature of 35 ℃;
drying the wool/polyester blended fiber: and (3) putting the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber for 10min at 25 ℃ and 35MPa, releasing pressure, taking out the fiber from the supercritical carbon dioxide drying kettle, and finishing dyeing.
The mixed solvent is recycled: carrying the mixed solvent on the fibers in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle into a separation kettle by carbon dioxide, cleaning the dyed fibers by the separated mixed solvent in a cleaning tank, filtering the cleaned mixed solvent to remove insoluble impurities, entering a liquid preparation tank, analyzing the contents of alkali-resistant disperse blue APH, active brilliant blue BPF, urea and sodium carbonate in the filtered mixed solvent in the liquid preparation tank, supplementing the concentration of the alkali-resistant disperse blue APH to 30g/L, supplementing the concentration of the active brilliant blue BPF to 30g/L, supplementing the concentration of the urea to 20g/L and supplementing the concentration of the sodium carbonate to 20g/L, and mixing the urea with a pad dyeing solution.
And (3) recycling carbon dioxide: and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain the carbon dioxide of the mixed solvent and enter a separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
TABLE 1
Claims (8)
1. A double-medium circulation dyeing method with high dye-uptake and color fastness is characterized in that: the method comprises the following steps:
pre-swelling the fiber in pad dyeing solution at 5-60 ℃ for 30s-24h, and padding the pre-swelled fiber under 0.01-0.7 MPa;
placing the padded fiber into a supercritical carbon dioxide dyeing kettle, dyeing the padded fiber at 40-140 deg.C and 12-35MPa for 30-150min, and releasing pressure;
putting the dyed fiber into a cleaning tank, and cleaning the fiber in a solvent of a pad dyeing solution at the cleaning temperature of 0-45 ℃;
placing the cleaned fiber into a supercritical carbon dioxide drying kettle, drying the cleaned fiber at 40-140 deg.C and 12-35MPa for 5-60min, and releasing pressure.
2. The high dye-uptake and color fastness double media cycle dyeing process according to claim 1, characterized in that: the fiber is natural cellulose fiber, natural protein fiber, regenerated fiber, synthetic fiber or blended fiber.
3. The high dye-uptake and color fastness double media cycle dyeing process according to claim 2, characterized in that: the pad dyeing solution comprises dye, alkali and solvent.
4. The high dye-uptake and color fastness double media cycle dyeing process according to claim 3, characterized in that: the dye is at least one of reactive dye, disperse dye, cationic dye, direct dye and acid dye;
the concentration of the dye is 1-100 g/L.
5. The high dye-uptake and color fastness double media cycle dyeing process according to claim 4, characterized in that: the alkali is at least one of potassium carbonate, sodium carbonate, methylamine, urea, ethylamine, ethylenediamine, dimethylamine, triethylene diamine, trimethylamine, triethylamine, pyridine, potassium hydroxide, sodium hydroxide and ammonium hydroxide;
the concentration of the alkali is 0-100 g/L.
6. The high dye-uptake and color fastness double media cycle dyeing process according to claim 5, characterized in that: the solvent is one, two or three of dimethyl sulfoxide, N-dimethylformamide, dimethylacetamide, methanol, ethanol, glycol, acetone, dichloromethane and trichloromethane;
when the two solvents are used, the volume ratio of the two solvents is 10-90: 90-10 parts of;
when the number of the solvents is three, any two solvents are mixed according to the volume ratio of 10-90: 90-10, and adding a third solvent, wherein the volume ratio of the third solvent to the mixture of the first two solvents is 10-90: 90-10.
7. The high dye-uptake and color fastness double media cycle dyeing process according to claim 6, characterized in that: the method comprises the following steps:
the solvent on the fiber in the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle is brought into the separation kettle by carbon dioxide, and the separated solvent enters a cleaning tank to clean the dyed fiber;
filtering the cleaned solvent to remove insoluble impurities, feeding the solvent into a liquid preparation tank, analyzing the contents of the dye and the alkali in the filtered solvent in the liquid preparation tank, supplementing the dye and the alkali to the initial concentration, and mixing the dye and the alkali into the pad dyeing solution.
8. The high dye-uptake and color fastness double media cycle dyeing process according to claim 7, characterized in that: the method comprises the following steps:
and the supercritical carbon dioxide dyeing kettle and the supercritical carbon dioxide drying kettle contain solvent, the carbon dioxide enters the separation kettle, and the separated carbon dioxide is condensed and stored in a carbon dioxide storage tank.
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| JP2002371483A (en) * | 2001-06-11 | 2002-12-26 | Howa Kk | Method for dyeing and dyed material dyed by using the same method |
| CN104278568A (en) * | 2013-07-09 | 2015-01-14 | 无锡市兴麟染整环保有限公司 | Supercritical carbon dioxide dyeing process for finishing and pre-treating aramid fiber/viscose blended fabric polyethylene glycol |
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