CN108951204B - Method for electrochemically dyeing conductive yarn by using indigo dye - Google Patents
Method for electrochemically dyeing conductive yarn by using indigo dye Download PDFInfo
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- CN108951204B CN108951204B CN201810508124.9A CN201810508124A CN108951204B CN 108951204 B CN108951204 B CN 108951204B CN 201810508124 A CN201810508124 A CN 201810508124A CN 108951204 B CN108951204 B CN 108951204B
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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
- D06P1/228—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
- D06P1/44—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
- D06P1/645—Aliphatic, araliphatic or cycloaliphatic compounds containing amino groups
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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
- D06P1/653—Nitrogen-free carboxylic acids or their salts
- D06P1/6533—Aliphatic, araliphatic or cycloaliphatic
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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
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
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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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/20—Physical treatments affecting dyeing, e.g. ultrasonic or electric
- D06P5/2016—Application of electric energy
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Abstract
The invention relates to a method for electrochemically dyeing conductive yarns by using indigo dye, which comprises the following steps: s1, constructing an electrochemical dyeing device, wherein the electrochemical dyeing device comprises an anode, a cathode and a dye vat filled with electrolyte, the cathode is conductive yarn with a conductive inner core, and the conductive yarn is in contact with the electrolyte through a plurality of guide rollers; s2, introducing protective gas into the dye vat, controlling the temperature and the current density of the electrolyte to dye the conductive yarn, washing off the conductive inner core with hot water after dyeing, and finishing dyeing the conductive yarn by the indigo dye to obtain the hollow yarn. The method has the advantages that a reducing agent is not needed, the dosage of chemicals is greatly reduced, and dyeing wastewater can be greatly reduced; the fiber can be dyed without complete reduction of the dye, so that the time is saved, the consumption of chemicals is reduced, the discharged wastewater is less, and the environment is protected; and high-cost elements such as an ion exchange membrane and the like are not needed, so that the production cost is reduced.
Description
Technical Field
The invention belongs to a dyeing reduction technology of indigo dye, and particularly relates to a method for electrochemically dyeing conductive yarns by using the indigo dye.
Background
Along with the popularity of international jeans, the jeans are favored by more and more people. The demand of indigo dye for dyeing denim is increasing. Indigo dyes belong to the vat dyes. The vat dye is a leuco sodium salt which can not be directly dissolved in water and can be dissolved in water only after being reduced by a strong reducing agent such as sodium hydrosulfite in an alkaline solution, so that the fiber can be dyed. The most common vat dye reducing agent in the industry is sodium hydrosulfite (sodium dithionate), and the sodium hydrosulfite can generate high-toxicity sulfides such as sulfate, sulfite and thiosulfate under the action of oxidation, so that a large amount of dye wastewater is generated, and the environmental pollution is serious. The principle of the electrochemical reduction method is that electrons replace a reducing agent, and the redox effect is achieved through the action of current, so that the dye does not generate harmful substances and the three-waste pollution is avoided. Is a green and environment-friendly method capable of realizing zero emission. The invention can also accurately control the oxidation-reduction potential of the dye liquor, and can control the reduction degree and the reduction rate. Can also improve the dyeing quality and reduce the production cost.
Therefore, in recent years, researchers at home and abroad are continuously working on researching a clean production method to replace the current sodium hydrosulfite reduction method. The principle of the electrochemical method is that the reducing agent is replaced by electrons, and the electrons do not generate harmful byproducts, so that the method becomes a clean and environment-friendly dyeing method. In the past, people often use fixed anodes and fixed cathodes to firstly carry out electro-reduction on dye liquor, and dye the dye liquor after the dye liquor is completely reduced.
The conductive yarn is widely applied to the fields of static prevention, dust prevention, electromagnetic radiation prevention and the like at present, and is not applied to textile printing and dyeing at present.
Disclosure of Invention
The invention provides a method for electrochemically dyeing conductive yarns by using indigo dye, and aims to overcome the defects that a reducing agent is required to be used and the yarns to be dyed are dyed after the dye is completely reduced in the prior art.
The technical scheme for solving the technical problems is as follows: a method of electrochemically dyeing conductive yarn with indigo dye, comprising the steps of:
s1, constructing an electrochemical dyeing device, wherein the electrochemical dyeing device comprises an anode, a cathode and a dye vat filled with electrolyte, the cathode is conductive yarns with a conductive inner core, the conductive yarns are in contact with the electrolyte through a plurality of guide rollers, and the electrolyte contains the following substances in concentration: 0.02-20mol/L of indigo, 15-30mol/L of triethanolamine, 5-10mol/L of ferric sulfate, 0.001-1mol/L of gluconate and 0.01-0.1mol/L of sodium hydroxide;
s2, introducing protective gas into the dye vat, controlling the temperature of the electrolyte at 20-75 ℃, controlling the current density at 0.08-2.0 ampere/square decimeter, controlling the average contact dyeing time of the whole conductive yarn and the electrolyte at 40-120min, and washing off the conductive inner core after dyeing is finished, thus finishing dyeing the conductive yarn by the indigo dye.
On the basis of the technical scheme, the invention can also make the following further specific selection or better selection.
Specifically, the anode is a nickel electrode.
Specifically, the conductive inner core of the conductive yarn is prepared by adding a conductive medium into water-soluble fibers during spinning.
Preferably, the weight ratio of the water-soluble fibers to the conductive medium is 4-10: 1.
preferably, the water-soluble fiber is alginic acid fiber, vinylon or polyvinyl alcohol, and the conductive medium is carbon black, metal powder or conductive polymer fiber.
Specifically, the conductive polymer fiber is polyacetylene, polyaniline or polypyrrole.
Specifically, the gluconate is calcium gluconate, sodium gluconate or zinc gluconate.
Specifically, the protective gas is nitrogen or argon.
Specifically, the method for washing off the conductive inner core is to immerse the conductive yarn into hot water at 40-80 ℃ until the conductive inner core is dissolved.
Preferably, the linear speed of the reciprocating motion of the conductive yarn on the guide roller is 0.2-1.2 m/min.
Compared with the prior art, the invention has the beneficial effects that:
the invention does not need to use a reducing agent, greatly reduces the dosage of chemicals, and can greatly reduce dyeing wastewater; the fiber can be dyed without complete reduction of the dye, so that the time is saved, the consumption of chemicals is reduced, the discharged wastewater is less, and the environment is protected; the high-cost elements such as an ion exchange membrane and the like are not needed, the production cost is reduced, the device and the equipment are simpler, and the production efficiency of industrial production can be improved; by adopting the method provided by the invention, the indigo has high dyeing efficiency on the conductive yarn, the dyeing time is greatly saved, the dyeing efficiency is improved, and the production cost is saved.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus corresponding to the method for electrochemically dyeing conductive yarn with indigo dye provided by the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a dye vat; 2. a heating device; 3. a conductive yarn; 4. a stirring device; 5. and an anode.
Detailed Description
The principles and features of this invention are described in connection with the drawings and the detailed description of the invention, which are set forth below as examples to illustrate the invention and not to limit the scope of the invention.
For avoiding redundant description, the basic structure of the electrochemical dyeing apparatus constructed in the following embodiments is shown in fig. 1, and includes an anode 5, a cathode, and a dye vat 1 filled with an electrolyte, where the cathode is a conductive yarn 3 having a conductive inner core, the conductive yarn is in contact with the electrolyte through a plurality of guide rollers, and further includes a heating device 2 for heating the electrolyte and a stirring device 4 for uniformly dispersing solute in the electrolyte.
Example 1
A method of electrochemically dyeing conductive yarn with indigo dye, comprising the steps of:
an electrolyte is filled in the dye vat, and the electrolyte contains the following substances in concentration: 0.02-1mol/L of indigo blue, 15-25mol/L of triethanolamine, 5-6mol/L of ferric sulfate, 0.001-0.1mol/L of calcium gluconate and 0.01-0.05mol/L of sodium hydroxide; the conductive yarn grade takes cotton fiber as wrapping yarn, conductive polyaniline with one fifth of the weight of vinylon is added into spinning to obtain a conductive inner core, nitrogen is introduced into the dye vat, the temperature of electrolyte is controlled to be 20-35 ℃ through a heating device, the voltage intensity between a cathode and an anode is controlled to enable the current density to be 0.08-0.2 ampere/square decimeter, the average contact dyeing time of the whole conductive yarn and the electrolyte is 80-120min (the linear speed of the conductive yarn on a guide roller is 0.2m/min, the conductive yarn is dyed in the electrolyte for six times in a reciprocating mode), after dyeing is finished, the conductive inner core is washed out in hot water at 55-75 ℃, the conductive yarn is dyed by indigo dye, and the K/S value of the yarn after detection and dyeing is 18.24.
Example 2
A method of electrochemically dyeing conductive yarn with indigo dye, comprising the steps of:
an electrolyte is filled in the dye vat, and the electrolyte contains the following substances in concentration: 2-12mol/L of indigo, 20-25mol/L of triethanolamine, 8-10mol/L of ferric sulfate, 0.01-0.05mol/L of sodium gluconate and 0.05-0.1mol/L of sodium hydroxide; the conductive yarn grade takes cotton fiber as wrapping yarn, conductive polyaniline which is one fourth of the weight of vinylon is added into spinning to serve as a conductive inner core, nitrogen is introduced into the dye vat, the temperature of electrolyte is controlled to be 40-55 ℃ through a heating device, the voltage intensity between a cathode and an anode is controlled to enable the current density to be 0.1-0.4 ampere/square decimeter, the average contact dyeing time of the whole conductive yarn and the electrolyte is 40-60min (the linear speed of the conductive yarn on a guide roller is 0.5m/min, the conductive yarn is dyed in the electrolyte for six times in a reciprocating mode), after dyeing is finished, the conductive inner core is washed out in hot water at the temperature of 60-80 ℃, namely dyeing of the conductive yarn by indigo dye is finished, and the K/S value of the yarn after detection and dyeing is 18.51.
Example 3
A method of electrochemically dyeing conductive yarn with indigo dye, comprising the steps of:
an electrolyte is filled in the dye vat, and the electrolyte contains the following substances in concentration: 10-16mol/L of indigo, 26-30mol/L of triethanolamine, 7-8mol/L of ferric sulfate, 0.5-1mol/L of sodium gluconate and 0.08-0.1mol/L of sodium hydroxide; the conductive yarn grade takes cotton fiber as wrapping yarn, conductive polypyrrole with one tenth of the weight of alginic acid fiber is added into spinning to serve as a conductive inner core, nitrogen is introduced into the dyeing tank, the temperature of electrolyte is controlled to be 60-75 ℃ through a heating device, the voltage intensity between a cathode and an anode is controlled to enable the current density to be 1.0-2.0 amperes per square decimeter, the average contact dyeing time of the whole conductive yarn and the electrolyte is 40-50min (the linear speed of the conductive yarn on a guide roller is 1.2m/min, and the conductive yarn is dyed in the electrolyte for six times in a reciprocating mode), after dyeing is finished, the conductive inner core is washed in hot water at 40-50 ℃, the conductive yarn is dyed by indigo dye, and the K/S value of the yarn after detection and dyeing is 18.76.
Example 4
A method of electrochemically dyeing conductive yarn with indigo dye, comprising the steps of:
an electrolyte is filled in the dye vat, and the electrolyte contains the following substances in concentration: 18-20mol/L of indigo, 15-20mol/L of triethanolamine, 5-7mol/L of ferric sulfate, 0.05-0.25mol/L of zinc gluconate and 0.1mol/L of sodium hydroxide; the conductive yarn grade takes cotton fiber as wrapping yarn, one tenth of the weight of steel powder of polyvinyl alcohol is added into spinning to be used as a conductive inner core, nitrogen is introduced into the dye vat, the temperature of electrolyte is controlled to be 55-65 ℃ through a heating device, the voltage intensity between a cathode and an anode is controlled to enable the current density to be 0.7-1.5 amperes per square decimeter, the average contact dyeing time of the whole conductive yarn and the electrolyte is 70-90min (the linear speed of the conductive yarn on a guide roller is 0.8-1.0m/min, the conductive yarn is dyed in the electrolyte for six times in a reciprocating mode), after dyeing is finished, the conductive inner core is washed out in hot water at the temperature of 40-60 ℃, the conductive yarn is dyed by indigo dye, and the K/S value of the yarn after detection and dyeing is 18.38.
The embodiment shows that the method for electrochemically dyeing the conductive yarn by the indigo dye can efficiently dye the yarn, has less chemical reagent consumption, less three wastes, good environmental protection and lower production cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A method of electrochemically dyeing conductive yarn with indigo dye, comprising the steps of:
s1, constructing an electrochemical dyeing device, wherein the electrochemical dyeing device comprises an anode, a cathode and a dye vat filled with electrolyte, the cathode is conductive yarns with a conductive inner core, the conductive yarns are in contact with the electrolyte through a plurality of guide rollers, and the electrolyte contains the following substances in concentration: 0.02-20mol/L of indigo, 15-30mol/L of triethanolamine, 5-10mol/L of ferric sulfate, 0.001-1mol/L of gluconate and 0.01-0.1mol/L of sodium hydroxide;
s2, introducing protective gas into the dye vat, controlling the temperature of the electrolyte at 20-75 ℃, controlling the current density at 0.08-2.0 ampere/square decimeter, controlling the average contact dyeing time of the whole conductive yarn and the electrolyte at 40-120min, and washing off the conductive inner core after dyeing is finished, thus finishing dyeing the conductive yarn by the indigo dye.
2. The method of claim 1, wherein the anode is a nickel electrode.
3. The method for electrochemically dyeing conductive yarn with indigo dye according to claim 1, characterized in that the conductive core of the conductive yarn is made of water-soluble fiber with conductive medium added during spinning.
4. The method for electrochemically dyeing conductive yarn with indigo dye according to claim 3, wherein the weight ratio of water-soluble fiber to conductive medium is 4-10: 1.
5. the method for electrochemically dyeing the conductive yarn with the indigo dye according to claim 3, wherein the water-soluble fiber is alginic acid fiber, vinylon or polyvinyl alcohol, and the conductive medium is carbon black, metal powder, polyacetylene, polyaniline or polypyrrole.
6. The method of claim 1, wherein the salt of gluconic acid is calcium gluconate, sodium gluconate or zinc gluconate.
7. The method of claim 1, wherein the shielding gas is nitrogen or argon.
8. The method of claim 1, wherein the conductive core is washed away by immersing the conductive yarn in hot water at 40-80 ℃ until the conductive core is dissolved.
9. The method of claim 1, wherein the linear speed of the conductive yarn reciprocating on the guide roller is 0.2-1.2 m/min.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408037A (en) * | 1999-12-22 | 2003-04-02 | 德意志戴斯达纺织品及染料两合公司 | Electrochemical reduction for reducible dyes |
| CN106868533A (en) * | 2017-01-19 | 2017-06-20 | 武汉纺织大学 | The preparation method of the double-component complex system indirect electrochemical restoring method, system and system of bipseudoindoxyl dye |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2496072C (en) * | 2004-02-18 | 2007-08-07 | Kuraray Co., Ltd. | Conductive polyvinyl alcohol fiber |
| CN103668616B (en) * | 2013-12-10 | 2016-05-11 | 苏州大学张家港工业技术研究院 | A kind of carbon nano-tube modification polyvinyl alcohol nano yarn and preparation method thereof |
| CN105603718B (en) * | 2016-02-05 | 2019-02-19 | 济南圣泉集团股份有限公司 | A kind of composite fibre, and its preparation method and application |
| CN106637923A (en) * | 2016-10-17 | 2017-05-10 | 哈尔滨工业大学 | Method of quickly and continuously depositing graphene on surface of electric-conductive fibers |
| CN106773437A (en) * | 2017-03-14 | 2017-05-31 | 武汉纺织大学 | A kind of electrochromism fabric and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408037A (en) * | 1999-12-22 | 2003-04-02 | 德意志戴斯达纺织品及染料两合公司 | Electrochemical reduction for reducible dyes |
| CN106868533A (en) * | 2017-01-19 | 2017-06-20 | 武汉纺织大学 | The preparation method of the double-component complex system indirect electrochemical restoring method, system and system of bipseudoindoxyl dye |
Non-Patent Citations (1)
| Title |
|---|
| 还原染料的电化学还原染色;于文涛等;《化工时刊》;20020115(第01期);第27-29页 * |
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