CN113463410A - Time-saving and environment-friendly alkali-free dyeing process - Google Patents
Time-saving and environment-friendly alkali-free dyeing process Download PDFInfo
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- CN113463410A CN113463410A CN202110765300.9A CN202110765300A CN113463410A CN 113463410 A CN113463410 A CN 113463410A CN 202110765300 A CN202110765300 A CN 202110765300A CN 113463410 A CN113463410 A CN 113463410A
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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
-
- 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
- D06P1/38—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 reactive dyes
-
- 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
- D06P1/445—Use of auxiliary substances before, during or after dyeing or printing
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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
- D06P3/58—Material containing hydroxyl groups
- D06P3/60—Natural or regenerated cellulose
- D06P3/66—Natural or regenerated cellulose using reactive dyes
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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
- D06P5/2066—Thermic treatments of textile materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention discloses a time-saving and environment-friendly alkali-free dyeing process, which comprises the following steps: s1) adding refined salt into a dye vat filled with tap water, dissolving and uniformly stirring, and immersing the pretreated fabric into the liquid in the dye vat; s2), adding a dyeing material, then adding an accelerating agent, and adjusting the adding amount of the accelerating agent to make the pH value of a dye solution containing the dyeing material accord with a set range value, so that the dye solution is weakly alkaline; s3) heating the dye solution to enable the temperature of the dye solution to reach the dyeing temperature and the dye solution to keep constant temperature; s4) reducing the temperature of the dye liquor to 60 ℃, discharging the dye liquor in the dye vat, sequentially carrying out the steps of first soaping, second soaping, hot water boiling and color fixing on the fabric, and then discharging the fabric out of the dye vat to finish dyeing of the fabric.
Description
Technical Field
The invention relates to the technical field of textile dyeing, in particular to a time-saving and environment-friendly alkali-free dyeing process.
Background
In order to improve the color fixing effect of cotton fabrics, the dyeing process in the prior art adopts a one-salt three-alkali process, wherein salt needs to be added twice, a dyeing material is added after the salt is added twice, soda needs to be added three times in the dyeing process after the dyeing material is added subsequently, so as to keep the pH value of the dyeing solution about 11, and the sodium carbonate is added for multiple times, so that the man-machine interaction time is too long, the energy consumption of equipment is high, the process steps are various, the discharged dyeing solution contains a large amount of soda, and the cost of wastewater treatment is high.
Disclosure of Invention
The invention provides a time-saving and environment-friendly alkali-free dyeing process, which has the advantages of simple steps, short dyeing time, environmental protection and energy saving, and solves the technical problems of various steps, overlong dyeing time, high energy consumption and high wastewater treatment cost of the cotton fabric dyeing process in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a time-saving and environment-friendly alkali-free dyeing process is used for dyeing cotton fabrics and comprises the following steps:
s1) adding refined salt into a dye vat filled with tap water, dissolving and uniformly stirring, and immersing the pretreated fabric into the liquid in the dye vat;
s2), adding a dyeing material, then adding an accelerating agent, and adjusting the adding amount of the accelerating agent to make the pH value of a dye solution containing the dyeing material accord with a set range value, so that the dye solution is weakly alkaline;
s3) heating the dye solution to enable the temperature of the dye solution to reach the dyeing temperature and the dye solution to keep constant temperature;
s4) reducing the temperature of the dye liquor to 60 ℃, then discharging the dye liquor in the dye vat, and then sequentially carrying out the steps of first soaping, second soaping, hot water boiling and color fixing on the fabric, and then discharging the fabric out of the dye vat to finish the dyeing of the fabric.
Further, in step S2), the accelerating agent is a non-ionic surfactant, and the accelerating agent is a compound containing an oxirane functional group;
the dyeing material is an alkali-free active dyeing material, and the dyeing material is a compound containing a terminal hydroxyl active group.
Specifically, in step S2), the pH of the stock solution of the accelerating agent is 8.0.
Specifically, the set range value of the pH value of the dye solution is 8.5-9.0; the addition amount of the accelerating agent in the dye solution is 2.8-3.3 g/L.
Preferably, in the step S3), the dyeing temperature is 80-84 ℃, and the constant temperature time is 40 min.
Preferably, in step S1), the temperature of the tap water is 40 ℃; the addition amount of the refined salt is 135-150 g/L.
Preferably, in step S3), the heating rate is 2 ℃/min;
in step S4), the temperature decrease rate is 1.5 ℃/min.
Optionally, in step S4), before discharging the dye liquor, a step of performing a cut-sample color matching on the fabric is further included.
Further, the water-fast color fastness of the fabric dyed by the steps S1) to S4) is 3-4 grade.
Preferably, in step S2), the amount of dye added is 0.2-4 owf%.
The technical scheme of the invention has the beneficial effects that: the time-saving and environment-friendly alkali-free dyeing process has the advantages that the addition of soda is not needed in the dyeing process, the operation steps are simple, the time is short, the energy consumption is low, the discharged dye solution does not contain soda, the COD index does not exceed 800mg/L, the cost of treating the dye solution wastewater is relatively low, and the process is more environment-friendly compared with the dyeing process adopting soda.
Drawings
FIG. 1 is a process flow diagram of one embodiment of the present invention.
Detailed Description
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
The technical solution of the present invention is further described with reference to fig. 1 and the detailed description thereof.
A time-saving and environment-friendly alkali-free dyeing process is used for dyeing cotton fabrics and comprises the following steps:
s1) adding refined salt into a dye vat filled with tap water, dissolving and uniformly stirring, and immersing the pretreated fabric into the liquid in the dye vat;
s2), adding a dyeing material, then adding an accelerating agent, and adjusting the adding amount of the accelerating agent to make the pH value of a dye solution containing the dyeing material accord with a set range value, so that the dye solution is weakly alkaline;
s3) heating the dye solution to enable the temperature of the dye solution to reach the dyeing temperature and the dye solution to keep constant temperature;
s4) reducing the temperature of the dye liquor to 60 ℃, then discharging the dye liquor in the dye vat, and then sequentially carrying out the steps of first soaping, second soaping, hot water boiling and color fixing on the fabric, and then discharging the fabric out of the dye vat to finish the dyeing of the fabric.
In order to improve the color fixing effect of cotton fabrics, the dyeing process in the prior art adopts a one-salt three-alkali process, wherein salt needs to be added twice, a dyeing material is added after the salt is added twice, soda needs to be added three times in the dyeing process after the dyeing material is added subsequently, so as to keep the pH value of the dyeing solution about 11, and the sodium carbonate is added for multiple times, so that the man-machine interaction time is too long, the energy consumption of equipment is high, the process steps are various, the discharged dyeing solution contains a large amount of soda, and the cost of wastewater treatment is high.
According to the time-saving and environment-friendly alkali-free dyeing process, the dyeing solution is alkalescent by adding the accelerating agent, so that the requirement of adding soda ash in the dyeing process can be avoided, the dyeing effect and the color fastness can be improved by carrying out chemical reaction on the dyeing material and the accelerating agent, the operation steps are simple, the dyeing time is short, the energy consumption is low, the discharged dyeing solution does not contain soda ash, the COD index does not exceed 800mg/L, the cost for treating the dyeing solution wastewater is relatively low, and the process is more environment-friendly compared with the dyeing process adopting soda ash.
In step S1, the pretreatment includes desizing, scouring, bleaching, mercerizing, and singeing in the prior art. Wherein, the steps of first soaping, second soaping, hot water boiling and color fixing in the step S4) are post-treatment processes in the prior art.
Further, in step S2), the accelerating agent is a non-ionic surfactant, and the accelerating agent is a compound containing an oxirane functional group;
the dyeing material is an alkali-free active dyeing material, and the dyeing material is a compound containing a terminal hydroxyl active group.
The epoxy ethane functional group contains a three-membered ring with larger tension, and at the temperature of 80-84 ℃ and under the condition of weak base, the dyeing material containing nucleophilic end hydroxyl active group can perform ring-opening reaction with the dyeing accelerant containing the epoxy ethane functional group, so that stable ether bond is formed, the adhesive force of the dyeing material on the surface of the fabric can be improved, and the water-fast color fastness of the fabric is further improved. The chemical reaction formula is as follows:
specifically, the pH value of the stock solution of the accelerating agent is 8.0.
The pH value of the stock solution of the accelerating agent is 8.0, and the pH value of the dye solution can be increased by increasing the addition amount of the dyeing material, so that the improvement of the sufficiency of the chemical reaction of the accelerating agent and the dyeing material is facilitated, and the color fixing effect is ensured.
Specifically, in step S2), the set range value of the pH value of the dye solution is 8.5 to 9.0; the addition amount of the accelerating agent in the dye solution is 2.8-3.3 g/L.
The detection shows that the pH value of the tap water supplied currently is between 6.5 and 7.8, the difference between the initial pH value of the tap water in the dye vat before the addition of the accelerating agent and the set range value of 8.5 to 9.0 is small, the pH value of the dye solution can be controlled to meet the requirement of 8.5 to 9.0 only according to the addition amount of 2.8 to 3.3g/L, the use amount of the accelerating agent is limited by measuring the pH, the environment is more environment-friendly, if the addition amount of the accelerating agent is too small, the dye solution is difficult to form a weak-alkali environment with the pH value of 8.5 to 9.0, the reaction effect of the accelerating agent and the dyeing material is easily influenced, and if the addition amount of the accelerating agent is too large, the alkalinity of the dye solution is excessively strong, and the cost of subsequent wastewater treatment is increased.
Preferably, in the step S3), the dyeing temperature is 80-84 ℃, and the constant temperature time is 40 min.
Under the temperature condition of 80-84 ℃, the dyeing effect of the accelerating agent and the dyeing material is better, and the color fastness of a dyed product is higher; if the dyeing temperature is lower than 80 ℃, the dyeing effect is poor, and if the dyeing temperature is higher than 85 ℃, the accelerating agent is easy to decompose, and the color fixing effect of the fabric is influenced.
Specifically, in the step S1), the temperature of the tap water is 40 ℃; the addition amount of the refined salt is 135-150 g/L.
The refined salt can reduce the charge effect in the fiber dyeing process, thereby improving the dye uptake of the dyeing material. The amount of the refined salt is determined according to the amount of the dye material, the darker the color is, the larger the amount of the dye material is, the corresponding amount of the refined salt is, for example, the dye requirement in the embodiment is black, and the amount of the refined salt is 140 g/L.
Specifically, in step S3), the heating rate is 2 ℃/min;
in step S4), the temperature decrease rate is 1.5 ℃/min.
The heating and temperature rising in the step S3) and the temperature reduction in the step S4 are not required to be too fast, so that the problem that the dyed fabric has color spots or uneven color due to uneven temperature of the dye solution is solved.
Further, step S4), before discharging the dye liquor, the method further includes a step of performing a cut-sample color matching on the fabric.
And (4) confirming whether the dyed fabric is matched with the color and the color depth of the color plate provided by the customer or not through the cut-out color matching.
Further, the water-fast color fastness of the fabric dyed by the steps S1) to S4) is 3-4 grade.
The dyed fabric has no color spots on the surface, the color fastness to water of the dyed fabric is detected according to the standard of GB/T5713-.
Preferably, in step S2), the amount of dye added is 0.2-4 owf%.
Specifically, a dyeing material or a combination of different dyeing materials can be selected according to the color of a sample provided by a customer, and the addition amount of each dyeing material is controlled within the range of 0.2-4 owf% on the premise of ensuring the dyeing effect, so that the treatment cost of the wastewater is reduced.
Examples 1 to 5 and comparative examples 1 to 5
1. The dyeing treatment of the fabrics of each example and each comparative example was carried out according to the following steps, using 26S double-yarn muslin as the fabric to be dyed, and the raw material components, the process parameters and the test results listed in tables 1 and 2, respectively:
s1) adding refined salt into a dye vat filled with tap water with the water temperature of 40 ℃, dissolving and uniformly stirring, and immersing the pretreated fabric into the liquid in the dye vat;
s2), adding a dyeing material, then adding an accelerating agent (an accelerating agent 2020 produced by Fushan Yufeng dye Co., Ltd.), and adjusting the adding amount of the accelerating agent to make the pH value of a dye solution containing the dyeing material accord with a set range value;
s3) heating the dye solution at a heating speed of 2 ℃/min to enable the temperature of the dye solution to reach the dyeing temperature, and keeping the dye solution at the constant temperature for 40 min;
s4) reducing the temperature of the dye liquor to 60 ℃ at a cooling speed of 1.5 ℃/min, then discharging the dye liquor in the dye vat, and taking the fabric out of the dye vat after sequentially carrying out the steps of first soaping, second soaping, hot water boiling and color fixing on the fabric, thus finishing the dyeing of the fabric;
in step S2), the dyeing material is a nonionic surfactant and contains an oxirane functional group; the dyeing material is an alkali-free active dyeing material, and contains a hydroxyl-terminated active group; the pH value of the stock solution of the accelerant is 8.0.
2. The water color fastness of the dyed fabrics of each example or comparative example and the COD index of the discharged dye solution after dyeing are detected according to the standard of GB/T5713 and 2013 textile color fastness to water.
TABLE 1 data and test results for the examples
TABLE 2 comparative data and test results
The analysis of the data according to tables 1 and 2 above is illustrated below:
1. the one-salt three-alkali dyeing process adopted in the comparative example 1 in the prior art can be used for preparing the dyed fabric with the water-fast color fastness of 3.1, and the COD index of the discharged dye solution after dyeing is 1045 mg/L.
2. The water fastnesses of the dyed fabrics of examples 1 to 5 were of grade 3, 3 to 4 or 4, none being lower than that of grade 3 of comparative example 1; the water color fastness of the examples 1 to 5 can meet the requirement that the water color fastness is 3 to 4 grade according to the standard GB/T5713 and 2013 textile color fastness test water color fastness, and the product fabric belongs to the A or B product as long as the pH value of the product fabric is kept in the range of 4.0 to 8.5, and can be used for clothes directly contacting with the skin, thereby showing that the technical scheme of the invention is effective.
3. The COD index of the discharged dye solution after dyeing of the examples 1-5 is 735-783mg/L, and compared with the COD index of 1045mg/L of the comparative example 1, the COD index of the examples 1-5 is more environment-friendly.
4. Comparative examples 2 and 3 differ from example 3 in that: the dyeing temperatures are different, the dyeing temperatures of the comparative example 2 and the comparative example 3 are respectively 76 ℃ and 88 ℃, the dyeing temperature of the comparative example 2 is too low, the dyeing temperature of the comparative example 3 is too high and exceeds the range of 80-84 ℃, the dyeing temperature is lower than 80 ℃, the effect is poor, the dyeing temperature is higher than 85 ℃, and the accelerating agent is easy to decompose, so that the water fastness of the comparative example 2 and the comparative example 3 is both 2-3 grades, and the quality requirements of customers cannot be met.
5. Comparative example 4 differs from example 3 in that: the addition amount of the accelerating agent is different, the addition amount of the accelerating agent in the comparative example 4 is 3.5g/L and exceeds the upper limit value of the range value of the addition amount of the accelerating agent in the comparative example 4, so that the upper limit of the pH value of the dye liquor in the comparative example 4 exceeding 9.0 reaches 9.3, but the water color fastness of the comparative example 4 is 3-4 grade, the improvement is not obvious compared with that of the example 3, and the water color fastness value is not higher than that of the example 5 in the grade 4, so that the setting of the addition amount of the accelerating agent in the range of 2.8-3.3g/L is reasonable, and the effect is not obvious when the addition amount exceeds the upper limit value; in addition, the addition of excessive dyeing accelerant increases the pH of the dyeing solution and the COD index of the dyed waste liquid, thereby increasing the raw material cost and the subsequent pollution discharge treatment cost.
6. Comparative example 5 differs from example 3 in that: the addition amount of the accelerating agent of comparative example 5 is small, the addition amount of the accelerating agent of comparative example 5 is 2.5g/L, which is lower than the lower limit value of the range value of the addition amount of the accelerating agent of 2.8 to 3.3g/L, resulting in that the upper limit of the pH value of the dye liquor of comparative example 5 lower than 8.5 is only 8.2, while the water fastness of comparative example 5 is grade 2 to 3, which cannot meet the quality requirements of customers, so it is reasonable to set the addition amount of the accelerating agent to 2.8 to 3.3 g/L.
In summary, the process flow diagram of the above embodiment of the present invention as shown in fig. 1 shows that the time-saving and environment-friendly alkali-free dyeing process does not require soda to be added in the dyeing process, the operation steps are simple, the time is short, the energy consumption is low, the discharged dyeing solution does not contain soda, the COD index does not exceed 800mg/L, the cost of wastewater treatment is relatively low, and the process is more environment-friendly compared with the dyeing process using soda.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
The technical principle of the present invention is described above in connection with specific embodiments. The description is only intended to explain the principles of the invention; and should not be construed as limiting the scope of the invention in any way. Based on the explanations herein; other embodiments of the invention will occur to those skilled in the art without the exercise of inventive faculty; all of which fall within the scope of the present invention.
Claims (10)
1. A time-saving and environment-friendly alkali-free dyeing process is used for dyeing cotton fabrics and is characterized by comprising the following steps:
s1) adding refined salt into a dye vat filled with tap water, dissolving and uniformly stirring, and immersing the pretreated fabric into the liquid in the dye vat;
s2), adding a dyeing material, then adding an accelerating agent, and adjusting the adding amount of the accelerating agent to make the pH value of a dye solution containing the dyeing material accord with a set range value, so that the dye solution is weakly alkaline;
s3) heating the dye solution to enable the temperature of the dye solution to reach the dyeing temperature and the dye solution to keep constant temperature;
s4) reducing the temperature of the dye liquor to 60 ℃, then discharging the dye liquor in the dye vat, and then sequentially carrying out the steps of first soaping, second soaping, hot water boiling and color fixing on the fabric, and then discharging the fabric out of the dye vat to finish the dyeing of the fabric.
2. The time-saving and environment-friendly alkali-free dyeing process according to claim 1, wherein in step S2), the accelerating agent is a non-ionic surfactant, and the accelerating agent is a compound containing an oxirane functional group;
the dyeing material is an alkali-free active dyeing material, and the dyeing material is a compound containing a terminal hydroxyl active group.
3. The time-saving and environment-friendly alkali-free dyeing process according to claim 1, wherein in the step S2), the pH value of the stock solution of the dyeing accelerant is 8.0.
4. The time-saving and environment-friendly alkali-free dyeing process as claimed in claim 1, wherein in step S2), the set range of the pH value of the dyeing solution is 8.5-9.0; the addition amount of the accelerating agent in the dye solution is 2.8-3.3 g/L.
5. The time-saving and environment-friendly alkali-free dyeing process as claimed in claim 1, wherein in the step S3), the dyeing temperature is 80-84 ℃, and the constant temperature time is 40 min.
6. The time-saving and environment-friendly alkali-free dyeing process according to claim 1, wherein in the step S1), the water temperature of the tap water is 40 ℃; the addition amount of the refined salt is 135-150 g/L.
7. The time-saving and environment-friendly alkali-free dyeing process as claimed in claim 1, wherein in the step S3), the heating speed is 2 ℃/min;
in step S4), the temperature decrease rate is 1.5 ℃/min.
8. The time-saving and environment-friendly alkali-free dyeing process as claimed in claim 1, wherein step S4) further comprises the step of performing a cut-sample color matching on the fabric before discharging the dye liquor.
9. The time-saving and environment-friendly alkali-free dyeing process according to claim 1, wherein the fabric dyed in steps S1) to S4) has a water color fastness of 3-4 grade.
10. The time-saving and environment-friendly alkali-free dyeing process as claimed in claim 1, wherein in the step S2), the addition amount of the dyeing material is 0.2-4 owf%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031704A (en) * | 2009-09-24 | 2011-04-27 | 上海兴康纺织科技有限公司 | Salt-free dyeing process of wool fibers based on reactive dye and dyeing promoter thereof |
| CN104631144A (en) * | 2015-01-20 | 2015-05-20 | 浙江金达亚麻有限公司 | Hemp fiber modifying and salt-free alkali-free dyeing method |
| CN111395013A (en) * | 2020-06-02 | 2020-07-10 | 佛山市南海区今易德纺织有限公司 | Rapid dyeing process of denim fabric |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031704A (en) * | 2009-09-24 | 2011-04-27 | 上海兴康纺织科技有限公司 | Salt-free dyeing process of wool fibers based on reactive dye and dyeing promoter thereof |
| CN104631144A (en) * | 2015-01-20 | 2015-05-20 | 浙江金达亚麻有限公司 | Hemp fiber modifying and salt-free alkali-free dyeing method |
| CN111395013A (en) * | 2020-06-02 | 2020-07-10 | 佛山市南海区今易德纺织有限公司 | Rapid dyeing process of denim fabric |
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