CN111826973A - Environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabric - Google Patents
Environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabric Download PDFInfo
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- CN111826973A CN111826973A CN202010773694.8A CN202010773694A CN111826973A CN 111826973 A CN111826973 A CN 111826973A CN 202010773694 A CN202010773694 A CN 202010773694A CN 111826973 A CN111826973 A CN 111826973A
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- 239000004744 fabric Substances 0.000 title claims abstract description 67
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- 230000000052 comparative effect Effects 0.000 description 7
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- RYYXDZDBXNUPOG-UHFFFAOYSA-N 4,5,6,7-tetrahydro-1,3-benzothiazole-2,6-diamine;dihydrochloride Chemical compound Cl.Cl.C1C(N)CCC2=C1SC(N)=N2 RYYXDZDBXNUPOG-UHFFFAOYSA-N 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- ZZZCUOFIHGPKAK-UHFFFAOYSA-N D-erythro-ascorbic acid Natural products OCC1OC(=O)C(O)=C1O ZZZCUOFIHGPKAK-UHFFFAOYSA-N 0.000 description 1
- 206010015150 Erythema Diseases 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229930003268 Vitamin C Natural products 0.000 description 1
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- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 1
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- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
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Classifications
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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
- D06P1/30—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 sulfur 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/651—Compounds without nitrogen
- D06P1/65106—Oxygen-containing compounds
- D06P1/65125—Compounds containing ester groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
- D06P1/651—Compounds without nitrogen
- D06P1/65106—Oxygen-containing compounds
- D06P1/65131—Compounds containing ether or acetal groups
-
- 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
- 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
- D06P3/6025—Natural or regenerated cellulose using vat or sulfur 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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Coloring (AREA)
Abstract
The invention discloses an environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabric, which comprises the following steps: 1) adding an alkali-resistant penetrating agent, salt and caustic soda into the dye vat according to a pretreatment process, heating and preserving heat; 2) feeding cold water into the auxiliary tank, starting a stirrer, sequentially adding a compound of caustic soda, sulfur black dye and an environment-friendly reducing agent, stirring and heating to ensure that the sulfur black dye is completely reduced into a leuco body; 3) adding the opened sulfur black dye into the dye vat, heating and preserving heat, then selecting a proper cooling rate according to the cloth type, cooling, and adding the quick washing enzyme in the cooling operation process; 4) discharging the dye liquor into a dye liquor recovery device for continuous use in next dyeing; 5) washing water and peracid; 6) soaping according to the soaping process, and cleaning and taking out of the tank after soaping. The invention solves the problems of long process time, big smell and serious pollution existing in the sulfur black dyeing of the cotton knitted fabrics, and simultaneously improves the problem of cloth cover effect deviation after sulfur black dyeing to a certain extent.
Description
Technical Field
The invention relates to an environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabrics, and belongs to the technical field of textile fabric processing.
Background
Sulfur dyes are one of the most widely used dyes today, and the worldwide production of sulfur dyes is reported to reach several hundred thousand tons, and the most important of them is sulfur black dyes. At present, the yield of the sulfur black accounts for 75-85% of the total yield of the sulfur dye, and the sulfur black is popular with various printing and dyeing manufacturers due to simple synthesis, low cost, better fastness and no carcinogenicity. The dye has wide application in dyeing cotton and other cellulose fibers, and is most widely applied in black series.
The sulfur dye dyeing process needs to reduce the dye into a leuco body before dyeing the fiber, and because the sodium sulfide has strong reducing capability and low price, most of the current sulfur black dyeing still adopts sodium sulfide as a reducing agent, and the sodium sulfide dosage is basically excessive, excessive parts can not only produce sulfur-containing sewage and pollute the environment, but also release hydrogen sulfide gas and harm the health of human beings, so the sulfur dye environment-friendly dyeing technology becomes the focus of industrial research.
In the current development situation of the industry, research on sulfur dye reducing agents mainly focuses on: research and development of reducing agents with low sulfur content or completely no pollution to the environment are carried out, and some substitutes of sodium sulfide, such as sodium hydrosulfite, thiourea dioxide, mercaptan, glucose and the like, are also found in the research process. From the theoretical perspective, the above substitutes can approach the reduction effect of sodium sulfide, but due to the limitation of factory production conditions or high process requirements, when the substitutes are applied to the batch production of printing and dyeing enterprises, a plurality of unstable factors are encountered, such as light color, colored flower, colored stain, erythema, color misregistration and the like, and the currently applied dyeing process of black vulcanized knitted fabrics in factories, including the most applied alkali sulfide dyeing process, has the phenomena of long dyeing time, large odor, cloth cover effect deviation, serious pollution discharge and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabrics, which solves the problems of long process time, large smell and serious pollution existing in sulfur black dyeing of cotton knitted fabrics, and simultaneously improves the problem of cloth cover effect deviation after sulfur black dyeing to a certain extent.
In order to achieve the purpose, the environment-friendly pollution-free sulfur black rapid dyeing process for the cotton knitted fabric comprises the following steps:
1) boiling and permeating: adding an alkali-resistant penetrating agent, salt and caustic soda into the dye vat according to a pretreatment process, heating and preserving heat;
2) sulfur black dye starting: feeding cold water into the auxiliary cylinder, opening a stirrer, sequentially adding a compound of caustic soda, a sulfur black dye and an environment-friendly reducing agent (namely, Baozu, adopting QH-2804 produced by Zhanfeng company in Guangdong), and stirring and heating to ensure that the sulfur black dye is completely reduced into a leuco body;
3) dyeing: adding the opened sulfur black dye into the dye vat, heating and preserving heat, then selecting a proper cooling rate according to the cloth type, cooling, and adding the quick washing enzyme in the cooling operation process;
4) dye liquor recovery: directly discharging the dye liquor into a dye liquor recovery device, and continuously using the recovered dye liquor for next dyeing;
5) washing: washing water and peracid;
6) soaping: soaping according to a normal soaping process, and cleaning and taking out of the tank after soaping.
Preferably, in the step 1), the dosage of the alkali-resistant penetrating agent is controlled to be 0.5-1% (owf), the dosage of the salt is controlled to be 10-15% (owf), the dosage of the caustic soda is controlled to be 2% (owf), and the pretreatment process condition is 95-105 ℃ for 30-10 minutes.
Preferably, in the step 2), the amount of the caustic soda is 2% (owf), the amount of the sulfur black dye is 10-14% (owf), the amount of the environment-friendly reducing agent compound is 5-6% (owf), the cutting temperature is 80-90 ℃, and the stirring time is 10-20 minutes.
Preferably, in the step 3), the dyeing process is carried out at 98 ℃ for 60 minutes, the temperature is reduced to 60 ℃ after dyeing, the dosage of the quick-washing enzyme added in the operation process is 0.5-1.0%, and the adding time is 20-30 minutes.
Preferably, in the step 4), the dye liquor can be directly recycled to the dye liquor recycling device after the quick-washing enzyme feeding is finished, and the dye can be saved by 15-20% after the subsequent dyeing is recycled, so that the sewage discharge amount is greatly reduced.
Preferably, in the step 5), washing water is 1-2 cylinders, a shower head function is recommended to be turned on in the washing process, the cloth cover is cleaned, the 1 cylinder is neutralized for 20 minutes at 50 ℃, and the residual alkali on the cloth cover and the fiber core is neutralized.
Preferably, in the step 6), the soaping process conditions are as follows: the amount of soaping agent was 1% (owf), 80 ℃ for 15 minutes.
Preferably, the cotton knitted fabric is 21-40 cotton knitted fabric.
Preferably, the cotton knitted fabric is made of plain cloth, sweater cloth or rib cloth.
Preferably, the cotton knitted fabric sulfur black dyeing process is suitable for common equipment of printing and dyeing factories such as a gas-liquid dyeing machine, a water flow dyeing machine and an overflow dyeing machine.
The mechanism of the invention is as follows:
the dyeing process of the sulfur black dye comprises the following steps: reducing water-insoluble sulfur black into water-soluble sulfur black leuco body by a reducing agent, dyeing fibers by the leuco body, and oxidizing the leuco body into water-insoluble sulfur black to be fixed on the fibers by an oxidizing agent after the leuco body is dyed on the fibers.
The commonly used reducing agent is sodium sulfide, which readily generates malodorous hydrogen sulfide. According to the environment-friendly pollution-free quick dyeing process for sulfur black, disclosed by the invention, the environment-friendly reducing agent compound is Huanbu QH-2804 developed by Zhanfeng company in Guangdong, and is prepared by uniformly mixing vitamin C, sucrose and glucose in a powder mixer according to the mass ratio of 1:4:5, so that the product is completely free of sulfur, sulfur dyes are dissolved, hydrogen sulfide with malodor cannot be generated in the dyeing process, the comfort of the production environment is improved, and the environment-friendly pollution-free quick dyeing process is an ideal substitute for sodium sulfide.
The oxidant commonly used is dissolved oxygen in water, which is limited and requires a large amount of water and time for oxidation. The environment-friendly pollution-free fast dyeing process of the sulfur black has the advantages that the fast washing enzyme is a biological enzyme preparation product 1639 produced and provided by Novixin corporation, the environment is not polluted, the action specificity of the enzyme is utilized, 1639 added in the dyeing solution can convert the retastatin QH-2804 into oxygen in a short time, and an oxidant required by oxidation of leuco is provided, so that the water amount and the oxidation time of oxidation washing water are reduced.
The environment-friendly pollution-free sulfur black rapid dyeing process of the invention is based on the existing cotton knitted fabric sulfur black dyeing process, adopts the element QH-2804 to replace sodium sulfide to reduce sulfur black dye, and the element QH-2804 is a compound of novel environment-friendly reducing agents, is non-toxic, tasteless, sulfur-free and phosphorus-free; the invention utilizes the quick washing enzyme to avoid the oxidation process of washing water, saves more than 8 tons of water for producing one ton of dyed cloth, and shortens the process flow by more than 1 hour; the invention utilizes the dye liquor recovery device (a conventional large liquid storage device) to recover the residual dye liquor after dyeing, can repeatedly dye and be recycled, greatly reduces the sewage discharge, recovers the dye liquor, and can save the sulfur black dye by 15-20 percent after being repeatedly utilized.
Drawings
FIG. 1 is a process flow diagram of one embodiment of the present invention.
Detailed Description
The sulfur black dyeing of the cotton knitted fabrics is rapid, environment-friendly and pollution-free, and the cloth cover effect is superior to the effect of the traditional sulfur black dyeing process. Firstly, the invention selects environment-friendly reducing agent raw materials for research, development and compounding; secondly, a novel fast washing enzyme is developed, the dyeing production process is optimized, the step of washing water oxidation is omitted in the sulfur black dyeing process, and the process time is shortened; and thirdly, a dye liquor recovery device is installed, so that residual dye liquor after dyeing is recycled, and the dye consumption is saved, thereby saving the production cost.
In order that the above-recited effects, features and process advantages of the present invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Example 1
Referring to fig. 1, an environment-friendly pollution-free sulfur black fast dyeing process for cotton knitted fabric comprises the following steps:
1) selecting 32S all-cotton plain cloth as cloth for large-scale production;
2) boiling and permeating: adding 0.5 percent of alkali-resistant penetrating agent (owf), 15 percent of salt (owf) and 2 percent of caustic soda (owf) into a dye vat, wherein the pretreatment process condition is 105 ℃ multiplied by 10 minutes;
3) sulfur black dye starting: 12 percent of sulfur black dye (owf), 2 percent of caustic soda (owf) and 5 percent of vat preservative (owf), wherein the starting temperature of the auxiliary vat is 85 ℃, and the stirring time is 10 minutes;
4) dyeing: 60 minutes at 98 ℃, cooling to 60 ℃ at the speed of 1.5 ℃/min after dyeing, adding 1.0 percent (owf) of quick-washing enzyme in the running process, and feeding for 30 minutes;
5) after the quick-washing enzyme feeding is finished, directly recovering the dye liquor into a dye liquor recovery device for subsequent dyeing and recycling;
6) washing water 2 tank, wherein the function of the shower head is turned on in the washing water process, the water is neutralized 1 tank, the glacial acetic acid is 0.5g/L, and the temperature is multiplied by 20 minutes at 50 ℃;
7) soaping: soaping agent 1% (owf), 80 ℃ for 15 minutes, and cleaning and taking out of the tank after soaping.
Example 2
An environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabric comprises the following steps:
1) selecting 32S all-cotton plain cloth as cloth for large-scale production;
2) boiling and permeating: adding 0.5 percent of alkali-resistant penetrating agent (owf), 15 percent of salt (owf) and 2 percent of caustic soda (owf) into a dye vat, wherein the pretreatment process condition is that the temperature is 98 ℃ for 30 minutes;
3) sulfur black dye starting: 12 percent of sulfur black dye (owf), 2 percent of caustic soda (owf) and 5 percent of vat preservative (owf), wherein the starting temperature of the auxiliary vat is 85 ℃, and the stirring time is 10 minutes;
4) dyeing: 60 minutes at 98 ℃, cooling to 60 ℃ after dyeing, adding 1.0 percent (owf) of quick-washing enzyme in the running process, and adding for 30 minutes;
5) directly recycling the dye liquor into a dye liquor recycling device after the quick washing enzyme feeding is finished;
6) washing water 2 tank, wherein the function of the shower head is turned on in the washing water process, the water is neutralized 1 tank, the glacial acetic acid is 0.5g/L, and the temperature is multiplied by 20 minutes at 50 ℃;
7) soaping: the dosage of the soaping agent is 1 percent (owf), the temperature is 80 ℃ for 15 minutes, and the soaping agent is cleaned and taken out of the cylinder after being soaped.
Example 3
An environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabric comprises the following steps:
1) selecting 21S all-cotton 2 x 2 rib fabric as large-scale production fabric;
2) boiling and permeating: adding 0.5 percent of alkali-resistant penetrating agent (owf), 15 percent of salt (owf) and 2 percent of caustic soda (owf) into a dye vat, wherein the pretreatment process condition is 105 ℃ multiplied by 10 minutes;
3) sulfur black dye starting: 12 percent of sulfur black dye (owf), 2 percent of caustic soda (owf) and 5 percent of vat preservative (owf), wherein the starting temperature of the auxiliary vat is 90 ℃, and the stirring time is 10 minutes;
4) dyeing: 60 minutes at 98 ℃, cooling to 60 ℃ after dyeing, adding 1.0 percent (owf) of quick-washing enzyme in the running process, and feeding for 20 minutes;
5) directly recycling the dye liquor into a dye liquor recycling device after the quick washing enzyme feeding is finished;
6) washing water 2 tank, wherein the function of the shower head is turned on in the washing water process, the water is neutralized 1 tank, the glacial acetic acid is 0.5g/L, and the temperature is multiplied by 20 minutes at 50 ℃;
7) soaping: the dosage of the soaping agent is 1 percent (owf), the temperature is 80 ℃ for 15 minutes, and the soaping agent is cleaned and taken out of the cylinder after being soaped.
Example 4
An environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabric comprises the following steps:
(1) selecting 21S all-cotton 2 x 2 rib fabric as large-scale production fabric;
(2) boiling and permeating: adding 0.5 percent of alkali-resistant penetrating agent (owf), 15 percent of salt (owf) and 2 percent of caustic soda (owf) into a dye vat, wherein the pretreatment process condition is that the temperature is 98 ℃ for 30 minutes;
(3) sulfur black dye starting: 12 percent of sulfur black dye (owf), 2 percent of caustic soda (owf) and 5 percent of vat preservative (owf), wherein the starting temperature of the auxiliary vat is 90 ℃, and the stirring time is 10 minutes;
(4) dyeing: 60 minutes at 98 ℃, cooling to 60 ℃ after dyeing, adding 1.0 percent (owf) of quick-washing enzyme in the running process, and adding the material for 20 minutes;
(5) directly recycling the dye liquor into a dye liquor recycling device after the quick washing enzyme feeding is finished;
(6) washing water 2 jar, opening the shower head function in the washing water process, neutralizing 1 jar, glacial acetic acid 0.5g/L, multiplying 20 minutes at 50 ℃,
(7) soaping: the dosage of the soaping agent is 1 percent (owf), the temperature is 80 ℃ for 15 minutes, and the soaping agent is cleaned and taken out of the cylinder after being soaped.
Comparative example 1
The conventional sulfur black dyeing process comprises the following steps:
1) selecting 32S all-cotton plain cloth as cloth for large-scale production;
2) boiling and permeating: adding 0.5 percent (owf) of alkali-resistant penetrating agent and 7 percent (owf) of sodium sulfide into a dye vat, wherein the pretreatment process condition is that the temperature is 98 ℃ for 60 minutes;
3) sulfur black dye starting: 12 percent of sulfur black dye (owf) and 7 percent of sodium sulfide (owf), wherein the starting temperature of the auxiliary cylinder is more than 95 ℃, and the stirring time is 30 minutes;
4) dyeing: 60 minutes at 98 ℃, and cooling to 60 ℃ after dyeing;
5) quantitatively pumping water in the auxiliary tank, pumping 4 auxiliary tank water, overflowing washing water for 20-30 minutes every 15 minutes in the auxiliary tank, and draining;
6) washing with water in a 2 jar, neutralizing in a 1 jar, and allowing glacial acetic acid to be 0.5g/L at 50 ℃ for 20 minutes;
7) soaping: the dosage of the soaping agent is 1 percent (owf), the temperature is 95 ℃ for 15 minutes, and the soaping agent is cleaned and taken out of the cylinder after being soaped.
Comparative example 2
The conventional sulfur black dyeing process comprises the following steps:
1) selecting 21S cotton 2 x 2 rib fabric as production fabric;
2) boiling and permeating: adding 0.5 percent (owf) of alkali-resistant penetrating agent and 7 percent (owf) of sodium sulfide into a dye vat, wherein the pretreatment process condition is that the temperature is 98 ℃ for 60 minutes;
3) sulfur black dye starting: 12 percent of sulfur black dye (owf) and 7 percent of sodium sulfide (owf), wherein the starting temperature of the auxiliary cylinder is more than 95 ℃, and the stirring time is 30 minutes;
4) dyeing: 60 minutes at 98 ℃, and cooling to 60 ℃ after dyeing;
5) quantitatively pumping water in the auxiliary tank, pumping 3 auxiliary tank water, overflowing washing water for 20-30 minutes every auxiliary tank for draining;
6) washing with water in a 2 jar, neutralizing in a 1 jar, and allowing glacial acetic acid to be 0.5g/L at 50 ℃ for 20 minutes;
7) soaping: soaping agent 1% (owf), multiplying 15 minutes at 95 ℃, cleaning and taking out of the cylinder after soaping.
Computer color measurement is carried out on the cloth surface dyeing effects of the examples 1-4 and the conventional sulfur black dyeing comparative examples 1-2, the fastness is mainly compared with the dry and wet rubbing fastness after dyeing and is recorded in the following table 1, and the process duration is recorded in the following table 2.
TABLE 1 sulphur Black dyeing test data and Dry and Wet crockfastness test results
TABLE 2 duration of the sulfur black dyeing process
| Numbering | Length of penetration | Length of dyeing and oxidation | Length of soaping | Total process time length |
| Example 1 | 0.8h | 3.2h | 1.0h | 5.0h |
| Example 2 | 1.2h | 3.2h | 1.0h | 5.4h |
| Example 3 | 0.8h | 3.0h | 1.0h | 4.8h |
| Example 4 | 1.2h | 3.0h | 1.0h | 5.2h |
| Comparative example 1 | 1.6h | 4.0h | 1.0h | 6.6h |
| Comparative example 2 | 1.5h | 3.7h | 1.0h | 6.2h |
Remarking: in the above cloth cover test data:
firstly, data of example 1-2 are tested by taking the cloth cover effect of comparative example 1 of 32S all-cotton plain cloth in conventional sulfur black dyeing as a standard test;
② example 3-4 data, using 21S cotton 2X 2 rib cloth conventional sulfur black dyeing comparative example 2 cloth cover effect as standard test.
As can be seen from the data in tables 1 and 2, the environment-friendly pollution-free sulfur black rapid dyeing process for the cotton knitted fabric has a slightly darker color than that of the conventional sulfur black (sodium sulfide) dyeing process, and the color light of the cotton knitted fabric is slightly red compared with that of the conventional dyeing process; the dry rubbing fastness is improved by about 0.5 grade, the wet rubbing fastness is equivalent, and the total process duration is shortened by 1-1.6 hours compared with the conventional process.
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 or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabric is characterized by comprising the following steps:
1) boiling and permeating: adding an alkali-resistant penetrating agent, salt and caustic soda into the dye vat according to a pretreatment process, heating and preserving heat;
2) sulfur black dye starting: feeding cold water into the auxiliary tank, starting a stirrer, sequentially adding a compound of caustic soda, sulfur black dye and an environment-friendly reducing agent, stirring and heating to ensure that the sulfur black dye is completely reduced into a leuco body;
3) dyeing: adding the opened sulfur black dye into the dye vat, heating and preserving heat, then selecting a proper cooling rate according to the cloth type, cooling, and adding the quick washing enzyme in the cooling operation process;
4) dye liquor recovery: directly discharging the dye liquor into a dye liquor recovery device, and continuously using the recovered dye liquor for next dyeing;
5) washing: washing water and peracid;
6) soaping: soaping according to the soaping process, and cleaning and taking out of the tank after soaping.
2. The environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabrics according to claim 1, characterized in that in the step 1), the dosage of the alkali-resistant penetrating agent is controlled to be 0.5-1% (owf), the dosage of the salt is controlled to be 10-15% (owf), the dosage of the caustic soda is controlled to be 2% (owf), and the pretreatment process condition is 98-105 ℃ x 30-10 minutes.
3. The process of claim 1, wherein in step 2), the amount of caustic soda is 2% (owf), the amount of sulfur black dye is 10-14% (owf), the amount of environment-friendly reducing agent is 5-6% (owf), the cutting temperature is 80-90 ℃, and the stirring time is 10-20 minutes.
4. The environment-friendly pollution-free sulfur black quick dyeing process for cotton knitted fabrics according to claim 1, characterized in that in the step 3), the dyeing process is carried out at 98 ℃ for 60 minutes, the temperature is reduced to 60 ℃ after dyeing, the dosage of the quick washing enzyme added in the operation process is 0.5-1.0%, and the adding time is 20-30 minutes.
5. The environment-friendly pollution-free sulfur black quick dyeing process for cotton knitted fabrics according to claim 1, characterized in that in the step 4), the dye liquor can be directly recycled to the dye liquor recycling device after the quick washing enzyme feeding is finished, and the subsequent dyeing is recycled.
6. The environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabrics according to claim 1, characterized in that in the step 5), 1-2 cylinders of washing water are adopted.
7. The environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabrics according to claim 1, characterized in that in the step 6), the soaping process conditions are as follows: the amount of soaping agent was 1% (owf), 80 ℃ for 15 minutes.
8. The environment-friendly pollution-free sulfur black rapid dyeing process for cotton knitted fabrics according to claim 1, characterized in that the cotton knitted fabrics are 21-40 cotton knitted fabrics.
9. The environment-friendly pollution-free sulfur black rapid dyeing process for the cotton knitted fabric according to claim 8, wherein the cotton knitted fabric is made of plain cloth, sweater cloth or rib cloth.
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| CN113668119A (en) * | 2021-08-02 | 2021-11-19 | 浙江鑫兰纺织有限公司 | Processing method of double-layer warm-keeping jean fabric |
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