CN113969508A - Method for dyeing yarn - Google Patents
Method for dyeing yarn Download PDFInfo
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- CN113969508A CN113969508A CN202111449650.0A CN202111449650A CN113969508A CN 113969508 A CN113969508 A CN 113969508A CN 202111449650 A CN202111449650 A CN 202111449650A CN 113969508 A CN113969508 A CN 113969508A
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- dyeing
- yarn
- dye
- washing
- concentration
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- 238000004043 dyeing Methods 0.000 title claims abstract description 153
- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000000975 dye Substances 0.000 claims abstract description 86
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 31
- 230000033116 oxidation-reduction process Effects 0.000 claims abstract description 24
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 238000009970 yarn dyeing Methods 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims description 98
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- 238000001035 drying Methods 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 claims description 20
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- 238000009987 spinning Methods 0.000 claims description 11
- 239000004094 surface-active agent Substances 0.000 claims description 9
- 238000005517 mercerization Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 5
- 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 claims description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- 229920000433 Lyocell Polymers 0.000 claims description 3
- 229920000297 Rayon Polymers 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000007378 ring spinning Methods 0.000 claims description 3
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 26
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 16
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 15
- 229940097275 indigo Drugs 0.000 description 15
- 239000004744 fabric Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000988 sulfur dye Substances 0.000 description 2
- 206010028347 Muscle twitching Diseases 0.000 description 1
- 241000364051 Pima Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009990 desizing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- COHYTHOBJLSHDF-BUHFOSPRSA-N indigo dye Chemical compound N\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-BUHFOSPRSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000985 reactive dye Substances 0.000 description 1
- 238000009999 singeing Methods 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000000984 vat dye Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- D06P1/44—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
- D06P1/67375—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341 with sulfur-containing anions
-
- 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
Abstract
The invention relates to a yarn dyeing method, which comprises the following steps: respectively carrying out first dyeing and second dyeing on the yarn; wherein the first dyeing comprises the following steps: contacting the yarn with a first dye solution in a nitrogen environment for dyeing; the oxidation-reduction potential value of the first dye solution is-680 mV to-840 mV, the pH value is 11 to 13, and the first dye solution contains dye and reducing agent; the second dyeing comprises the following steps: contacting the yarn with a second dye liquor for dyeing; the oxidation-reduction potential value of the second dye solution is-680 mV to-840 mV, the pH value is 11 to 13, and the second dye solution contains dye and reducing agent. The yarn obtained by the dyeing method has good dyeing depth, small usage amount of chemicals and environment-friendly process.
Description
Technical Field
The invention relates to the technical field of dyeing and finishing, in particular to a yarn dyeing method.
Background
The traditional denim is usually formed by interweaving pure cotton indigo dyed warp yarns and natural color weft yarns by adopting a twill weave with three upper twills, one lower twills and one right twills. Common dyes for the warp dyeing of denim are indigo dyes, sulphur dyes and reactive dyes. The indigo dye and the sulfur dye are insoluble in water, have no affinity to the fiber, cannot be directly dyed, and generally need to be reduced into a leuco dye, such as an alkaline leuco dye or a sodium salt leuco dye, and then are dissolved in water, and are converted back to an insoluble state through oxidation in the process of dyeing the fiber and fixed on the fiber. However, the method of reducing the dye into the leuco dye is commonly used as a reducing agent by using a sodium hydrosulfite method, but the sodium hydrosulfite has active property and poor stability, and is easily oxidized by oxygen in the air, so that the using amount of the sodium hydrosulfite is increased. Meanwhile, the leuco dye is also easily oxidized in advance in the air, so that the consumption of the dye is easily caused, the consumption of the dye is increased, and the problems of uneven dyeing and the like are caused.
According to the method, through the improvement of equipment, nitrogen is introduced in the dyeing process, and the nitrogen is used for isolating the oxidation of the indigo, so that the problems of large dye consumption and uneven dye dyeing are avoided to a certain extent. However, the improvement of the equipment is combined with the traditional dyeing method, and still the expected dyeing effect is difficult to achieve, for example, the dyeing depth is not ideal, the washing-out effect is not good, and the optimization of the chemical dosage and the ring dyeing effect has no practical guiding significance.
Disclosure of Invention
Based on the method, the dyeing method of the yarn is good in dyeing depth, small in chemical usage amount and environment-friendly in process.
The specific technical scheme is as follows:
a method of dyeing yarn comprising the steps of:
respectively carrying out first dyeing and second dyeing on the yarn;
wherein the first dyeing comprises the following steps: contacting the yarn with a first dye solution in a nitrogen environment for dyeing; the oxidation-reduction potential value of the first dye solution is-680 mV to-840 mV, the pH value is 11 to 13, and the first dye solution contains dye and reducing agent;
the second dyeing comprises the following steps: contacting the yarn with a second dye liquor for dyeing; the oxidation-reduction potential value of the second dye solution is-680 mV to-840 mV, the pH value is 11 to 13, and the second dye solution contains dye and reducing agent.
In one embodiment, the conditions under which the nitrogen environment is provided include: the outlet pressure of the nitrogen is 1 bar-3 bar, and the flow of the nitrogen is 40-45 m3/h。
In one embodiment, the concentration of the dye in the first dye solution is 1-20 g/L, and the concentration of the reducing agent is 0.05-0.5 g/L; and/or
The concentration of the dye in the second dye solution is 1-3 g/L, and the concentration of the reducing agent is 0.05-0.5 g/L.
In one embodiment, in the second dye liquor and/or the second dye liquor, the reducing agent is selected from one or more of sodium hydrosulfite (sodium hydrosulfite), D-glucose powder and thiourea dioxide.
In one embodiment, before the first dyeing and the second dyeing, one or more steps of pretreatment, water washing, drying and mercerization are further included.
In one embodiment, the pretreatment refers to the treatment of the yarn by adopting a pretreatment liquid, wherein the pretreatment liquid comprises a surfactant with the concentration of 5-10 g/L and caustic soda with the concentration of 4-7 g/L, and the treatment temperature is 60-90 ℃; and/or
The water washing refers to normal temperature water washing and/or hot water washing, and the hot water temperature of the hot water washing is 50-80 ℃; and/or
The drying conditions include: the temperature is 90-120 ℃; and/or
Mercerizing refers to treating yarns by using mercerizing liquid, and then washing and/or pickling; the mercerizing liquid comprises caustic soda with a concentration of 8-20 DEG Be and a surfactant with a concentration of 10-12 g/L.
In one embodiment, the surfactant is selected from one or more of sodium lauryl sulfate, pimatin, M oil and OK oil.
In one embodiment, after the first dyeing and the second dyeing are carried out, the steps of washing and/or drying are also included.
In one embodiment, the water washing refers to normal temperature water washing or hot water washing, and the hot water temperature of the hot water washing is 50-80 ℃; and/or
The drying conditions include: the temperature is 90-120 ℃.
In one embodiment, the fibers of the yarn are pure or blended yarns of cellucotton fibers, viscose fibers, tencel fibers, modal fibers; and/or
The spinning mode of the yarn is ring spinning, air spinning or compact spinning, and the number of the yarn is 5-15 English.
According to the dyeing method for the yarns, the first dyeing in the nitrogen environment and the second dyeing in the natural environment are combined, the technological parameters in the first dyeing process and the second dyeing process are reasonably controlled, the reducing agent and the leuco dye in the dyeing solution can be prevented from being excessively oxidized and volatilized, the leuco dye can be more uniformly adsorbed on the fiber surface of the yarns, the excellent dyeing effect is realized, the dyeing depth of the yarns is obviously improved, the better washing and fading effect can be obtained subsequently, and the colors are uniform. Meanwhile, the use and discharge of chemicals in the dyeing process are greatly reduced, and the process is environment-friendly.
In addition, the dyeing method of the yarn has the advantages of stable process, simplicity, convenience, high efficiency and low cost, and is suitable for industrial large-scale production.
Detailed Description
The method for dyeing the yarn of the present invention will be described in further detail with reference to specific examples. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As used herein, the term "and/or", "and/or" includes any one of two or more of the associated listed items, as well as any and all combinations of the associated listed items, including any two of the associated listed items, any more of the associated listed items, or all combinations of the associated listed items.
As used herein, "one or more" refers to any one, any two, or any two or more of the listed items.
In the present invention, "first aspect", "second aspect", "third aspect", "fourth aspect" and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or quantity, nor as implying an importance or quantity indicating the technical feature indicated. Furthermore, "first," "second," "third," "fourth," etc. are used for non-exhaustive enumeration of description purposes only, and it should be understood that no quantitative limitations are intended or should be inferred.
In the present invention, the technical features described in the open type include a closed technical solution composed of the listed features, and also include an open technical solution including the listed features.
In the present invention, the numerical intervals are regarded as continuous, and include the minimum and maximum values of the range and each value between the minimum and maximum values, unless otherwise specified. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range-describing features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein.
The percentage contents referred to in the present invention mean, unless otherwise specified, mass percentages for solid-liquid mixing and solid-solid phase mixing, and volume percentages for liquid-liquid phase mixing.
The percentage concentrations referred to in the present invention refer to the final concentrations unless otherwise specified. The final concentration refers to the ratio of the additive component in the system to which the component is added.
The temperature parameter in the present invention is not particularly limited, and may be a constant temperature treatment or a treatment within a certain temperature range. The constant temperature process allows the temperature to fluctuate within the accuracy of the instrument control.
Unless otherwise specified, the steps in the present invention are all carried out under normal temperature conditions. The normal temperature is generally 4-30 deg.C, preferably 20 + -5 deg.C.
The "nitrogen atmosphere" in the present invention means that the dyeing process is performed under the protection of nitrogen, and the "natural atmosphere" means an environment in which no additional environmental treatment (such as replacement of air with nitrogen) is performed except for the operation usually necessary for dyeing.
Unless otherwise specified, the solvent in the treatment solution of the present invention is water. Such as dye liquor, pretreatment liquor, mercerizing liquor and the like.
The invention provides a yarn dyeing method, which comprises the following steps:
respectively carrying out first dyeing and second dyeing on the yarn;
wherein the first dyeing comprises the following steps: contacting the yarn with a first dye solution in a nitrogen environment for dyeing; the oxidation-reduction potential value of the first dye solution is-680 mV to-840 mV, the pH value is 11-13, and the first dye solution contains dye and reducing agent;
the second dyeing comprises the following steps: contacting the yarn with a second dye liquor for dyeing; the oxidation-reduction potential value of the second dye solution is-680 mV to-840 mV, the pH value is 11-13, and the second dye solution contains dye and reducing agent.
It is understood that there is no specific order between the first dyeing and the second dyeing, such as the first dyeing may be performed first and then the second dyeing; alternatively, the second dyeing may be carried out first, followed by the first dyeing.
In one specific example, in the first dyeing, the oxidation-reduction potential value of the first dyeing solution is-680 mV to-840 mV. Specifically, the oxidation-reduction potential values of the first dye solution include, but are not limited to: -680mV, -700mV, -730mV, -750mV, -780mV, -800mV, -820mV, -840 mV.
In one specific example thereof, there is providedThe conditions of the nitrogen environment include: the outlet pressure of the nitrogen is 1 bar-3 bar, and the flow of the nitrogen is 40-45 m3H is used as the reference value. Specifically, the outlet pressure of the nitrogen gas includes, but is not limited to: 1bar, 2bar, 3 bar. The flow of nitrogen includes, but is not limited to: 40m3/h、41m3/h、42m3/h、43m3/h、44m3/h、45m3/h。
In a specific example, the concentration of the dye in the first dye solution is 1-20 g/L, and the concentration of the reducing agent is 0.05-0.5 g/L. Specifically, the concentration of the dye in the first dye liquor includes, but is not limited to: 1g/L, 1.8g/L, 3g/L, 4g/L, 6g/L, 8g/L, 10g/L, 12g/L, 15g/L, 20 g/L. Concentrations of reducing agents include, but are not limited to: 0.05g/L, 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5 g/L.
In one specific example, in the second dyeing, the oxidation-reduction potential value of the second dyeing solution is-680 mV to-840 mV. Specifically, the oxidation-reduction potential values of the first dye solution include, but are not limited to: -680mV, -700mV, -730mV, -750mV, -780mV, -800mV, -820mV, -840 mV.
In a specific example, the concentration of the dye in the second dye solution is 1-3 g/L, and the concentration of the reducing agent is 0.05-0.5 g/L. Specifically, the concentration of the dye in the second dye liquor includes, but is not limited to: 1g/L, 1.8g/L and 3 g/L. Concentrations of reducing agents include, but are not limited to: 0.05g/L, 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5 g/L.
In one specific example, the reducing agent in the second dye liquor and/or the second dye liquor is selected from one or more of sodium hydrosulfite (sodium hydrosulfite), D-glucose powder and thiourea dioxide. Further, the reducing agent is sodium hydrosulfite.
In one specific example, the dye in the second dye liquor and/or the second dye liquor comprises a leuco salt of the dye. Further, the dye leuco salt is a vat dye leuco salt or a sulfur dye leuco salt. Specifically, the dye is indigo.
In one particular example, the pH of the second dye liquor and/or the second dye liquor is adjusted by means of caustic soda.
It is to be understood that the dyeing manner of the first dyeing and the second dyeing is not limited, and may be one of padding, transferring and spraying dyeing, and the transferring and spraying manner may be one positive and one negative or two positive and two negative.
In a specific example, the first dyeing is carried out in dye baths, and the number of the dye baths is 1-3.
In a specific example, the second dyeing is carried out in dye baths, and the number of the dye baths is 1-12.
In one specific example, before the first dyeing and the second dyeing, one or more steps of pretreatment, water washing, drying and mercerization are further included.
In one specific example, the pretreatment refers to treating the yarn by using a pretreatment liquid, wherein the pretreatment liquid comprises a surfactant with the concentration of 5-10 g/L and caustic soda with the concentration of 4-7 g/L, and the treatment temperature is 60-90 ℃.
In one specific example, the water washing refers to normal temperature water washing and/or hot water washing, and the hot water temperature of the hot water washing is 50-80 ℃. Further, the washing is carried out in washing tanks, and the number of the washing tanks is 2-4.
In one specific example, the drying conditions include: the temperature is 90-120 ℃. Further, the number of cylinders used for drying is 8-10.
In one specific example, mercerizing refers to treating yarns by using mercerizing liquid, and then washing and/or pickling; the mercerizing liquid comprises caustic soda with a concentration of 8-20 DEG Be and a surfactant with a concentration of 10-12 g/L.
In one specific example, in the pre-treatment and/or mercerization step, the surfactant is selected from one or more of sodium dodecyl sulfate, pima oil, M oil and OK oil.
In one specific example, after the first dyeing and the second dyeing are performed, the steps of washing and drying are further included.
In one specific example, the water washing refers to normal temperature water washing or hot water washing, and the hot water temperature of the hot water washing is 50-80 ℃. Further, the washing is carried out in washing tanks, and the number of the washing tanks is 2-4.
In one specific example, the drying conditions include: the temperature is 90-120 ℃. Further, the number of cylinders used for drying is 8-10.
In one specific example, the fibers of the yarn are spun yarns or blended yarns of cellucotton fibers, viscose fibers, lyocell fibers, modal fibers.
In one specific example, the yarn is spun by ring spinning, air spinning or compact spinning, and the number of the yarn is 5-15 English.
In one particular example, the method of dyeing the yarn comprises a step selected from the group consisting of:
(1) sequentially carrying out pretreatment, washing, first dyeing, second dyeing, washing and drying;
(2) sequentially carrying out pretreatment, washing, drying, first dyeing, second dyeing, washing and drying;
(3) the method comprises the steps of pretreatment, washing, secondary dyeing, primary dyeing, washing and drying in sequence.
Specific examples are as follows.
Example 1
This embodiment provides a dyeing method of yarn, and yarn adopts pure cotton compact spinning slub yarn, and yarn count is 9.8 english, first portion: 4400; vehicle speed: 25 m/min.
The dyeing process comprises the following steps:
(1) pretreatment: 6g/L of OK oil and 5g/L of caustic soda are added into the pretreatment tank, and the treatment temperature is 80 ℃;
(2) two water washing steps: carrying out two washing procedures on the pretreated yarn, wherein the temperature of a No. 1 washing tank is 60 ℃, the temperature of a No. 2 washing tank is normal temperature, and the padder pressure is 5 bar;
(3) dyeing with nitrogen: padding dyeing is adopted, the number of dyeing tanks is 1, the outlet pressure of nitrogen is 2bar, and the flow is 43m3The dyeing formula is as follows: the indigo concentration is 1.8g/L, the pH value is 12.2, the using amount of the sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(4) dyeing: padding dyeing is adopted, the number of dyeing tanks is 7, the concentration of indigo is 1.8g/L, the pH value is 12.2, the using amount of sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(5) four washing steps: washing the mixture in a tank for four times of normal temperature washing;
(6) drying: and (3) drying the yarns: the number of the cylinders is 10, and the drying temperature is 95 ℃.
Example 2
This embodiment provides a dyeing method of yarn, and yarn adopts pure cotton compact spinning slub yarn, and yarn count is 9.8 english, first portion: 4400; vehicle speed: 25 m/min.
The dyeing process comprises the following steps:
(1) pretreatment: 6g/L of OK oil and 5g/L of caustic soda are added into the pretreatment tank, and the treatment temperature is 80 ℃;
(2) two water washing steps: carrying out two washing procedures on the pretreated yarn, wherein the temperature of a No. 1 washing tank is 60 ℃, the temperature of a No. 2 washing tank is normal temperature, and the padder pressure is 5 bar;
(3) drying: drying the washed yarn, wherein the number of cylinders is 10;
(4) dyeing with nitrogen: transfer dyeing is adopted, the number of dyeing tanks is 1, the outlet pressure of nitrogen is 2bar, and the flow is 43m3The formula is as follows: the indigo concentration is 10g/L, the pH value is 12.2, the using amount of the sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(5) dyeing: transfer dyeing is adopted, the number of dyeing tanks is 7, the concentration of indigo is 1.8g/L, the pH value is 12.2, the using amount of sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(6) four washing steps: washing the mixture in a tank for four times of normal temperature washing;
(7) drying: and (3) drying the yarns: the number of the cylinders is 10, and the drying temperature is 95 ℃.
Example 3
This embodiment provides a dyeing method of yarn, and yarn adopts pure cotton compact spinning slub yarn, and yarn count is 9.8 english, first portion: 4400; vehicle speed: 25 m/min.
The dyeing process comprises the following steps:
(1) pretreatment: 6g/L of OK oil and 5g/L of caustic soda are added into the pretreatment tank, and the treatment temperature is 80 ℃;
(2) two water washing steps: carrying out two washing procedures on the pretreated yarn, wherein the temperature of a No. 1 washing tank is 60 ℃, the temperature of a No. 2 washing tank is normal temperature, and the padder pressure is 5 bar;
(3) dyeing: transfer dyeing is adopted, the number of dyeing tanks is 7, the indigo concentration is 1.8g/L, the pH value is 12.2, and the using amount of sodium hydrosulfite is as follows: 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(4) dyeing with nitrogen: transfer dyeing is adopted, the number of dyeing tanks is 1, the outlet pressure of nitrogen is 2bar, and the flow is 43m3The formula is as follows: the indigo concentration is 10g/L, the pH value is 12.2, and the using amount of the sodium hydrosulfite is as follows: 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(5) four washing steps: washing the mixture in a tank for four times of normal temperature washing;
(6) drying: and (3) drying the yarns: the number of the cylinders is 10, and the drying temperature is 95 ℃.
Comparative example 1
The yarn dyeing method of the comparative example adopts the same yarn and dyeing process as the example 1, and mainly has the following differences: no nitrogen staining step was performed.
The dyeing process comprises the following steps:
(1) pretreatment: 6g/L of OK oil and 5g/L of caustic soda are added into the pretreatment tank, and the treatment temperature is 80 ℃;
(2) two water washing steps: carrying out two washing procedures on the pretreated yarn, wherein the temperature of a No. 1 washing tank is 60 ℃, the temperature of a No. 2 washing tank is normal temperature, and the padder pressure is 5 bar;
(3) dyeing: padding dyeing is adopted, the number of dyeing tanks is 7, the concentration of indigo is 1.8g/L, the pH value is 12.2, the using amount of sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(4) four washing steps: washing the mixture in a tank for four times of normal temperature washing;
(5) drying: and (3) drying the yarns: the number of the cylinders is 10, and the drying temperature is 95 ℃.
Comparative example 2
The yarn dyeing method of the comparative example adopts the same yarn and dyeing process as the example 1, and mainly has the following differences: the dyeing step of step (4) was not performed.
The dyeing process comprises the following steps:
(1) pretreatment: 6g/L of OK oil and 5g/L of caustic soda are added into the pretreatment tank, and the treatment temperature is 80 ℃;
(2) two water washing steps: carrying out two washing procedures on the pretreated yarn, wherein the temperature of a No. 1 washing tank is 60 ℃, the temperature of a No. 2 washing tank is normal temperature, and the padder pressure is 5 bar;
(3) dyeing with nitrogen: padding dyeing is adopted, the number of dyeing tanks is 1, the outlet pressure of nitrogen is 2bar, and the flow is 43m3The dyeing formula is as follows: the indigo concentration is 1.8g/L, the pH value is 12.2, the using amount of the sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(4) four washing steps: washing the mixture in a tank for four times of normal temperature washing;
(5) drying: and (3) drying the yarns: the number of the cylinders is 10, and the drying temperature is 95 ℃.
Comparative example 3
The yarn dyeing method of the comparative example adopts the same yarn and dyeing process as the example 1, and mainly has the following differences: the oxidation-reduction potential values of the dye solutions in the nitrogen dyeing step are different and are-650 mV.
The dyeing process comprises the following steps:
(1) pretreatment: 6g/L of OK oil and 5g/L of caustic soda are added into the pretreatment tank, and the treatment temperature is 80 ℃;
(2) two water washing steps: carrying out two washing procedures on the pretreated yarn, wherein the temperature of a No. 1 washing tank is 60 ℃, the temperature of a No. 2 washing tank is normal temperature, and the padder pressure is 5 bar;
(3) dyeing with nitrogen: padding dyeing is adopted, the outlet pressure of nitrogen is 2bar, and the flow is 43m3The dyeing formula is as follows: the indigo concentration is 1.8g/L, the pH value is 11.8, the using amount of sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-650 mV;
(4) dyeing: padding dyeing is adopted, the concentration of indigo is 1.8g/L, the pH value is 12.2, the dosage of sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(5) four washing steps: washing the mixture in a tank for four times of normal temperature washing;
(6) drying: drying the yarns, wherein the number of the cylinders is 10, and the drying temperature is as follows: 95 ℃.
Comparative example 4
The yarn dyeing method of the comparative example adopts the same yarn and dyeing process as the example 1, and mainly has the following differences: the nitrogen dyeing step was not performed, while the pretreatment step was replaced with a mercerization step.
The dyeing process comprises the following steps:
(1) mercerizing: adding 12g/L of OK oil, the caustic soda concentration is 19 DEG Be, and the treatment temperature is normal temperature;
(2) four washing steps: carrying out four washing procedures on the mercerized yarn, wherein the temperature of a No. 1-3 washing tank is 60 ℃, the temperature of a No. 4 washing tank is normal temperature, and the padder pressure is 5 bar;
(3) dyeing: padding dyeing is adopted, the number of dyeing tanks is 7, the concentration of indigo is 1.8g/L, the pH value is 12.2, the using amount of sodium hydrosulfite is 0.1g/L, and the oxidation-reduction potential value is-780 mV;
(4) four washing steps: washing the mixture in a tank for four times of normal temperature washing;
(5) drying: and (3) drying the yarns: the number of the cylinders is 10, and the drying temperature is as follows: 95 ℃.
And (3) performance testing:
the yarns of the examples and comparative examples were tested for chroma value and the results are shown in table 1.
Then the yarns of the examples and the comparative examples are respectively used as warp yarns, the weft yarns adopt T/C16/40, and the weave structure of the fabric is twill in three-over-one-under-one-right mode; the machine density of the fabric is 66 × 48; the manufacturing process of the jean fabric comprises the following steps: warping → size dyeing → weaving → singeing → desizing → twitching → shrinking → finished product. The color value difference between the denim fabrics woven by the yarns of the comparative examples and the denim fabrics woven by the yarns of the comparative examples after the finished denim fabrics are subjected to hand rubbing, laser and fermentation washing is shown in the table 2.
TABLE 1
| Categories | L* | a* | b* | c* | h° | △E |
| Comparative example 1 | 15.1 | 2.0 | -6.8 | 7.1 | 286.5 | — |
| Comparative example 2 | 30.0 | -0.2 | -8.7 | 8.7 | 268.7 | 15.2 |
| Comparative example 3 | 17.1 | 2.5 | -8.2 | 8.6 | 287.0 | 2.5 |
| Comparative example 4 | 14.0 | 2.1 | -3.4 | 4.0 | 301.7 | 3.6 |
| Example 1 | 15.2 | 2.2 | -6.0 | 6.4 | 289.8 | 0.8 |
| Example 2 | 14.7 | 2.9 | -5.2 | 5.9 | 299.2 | 1.9 |
| Example 3 | 15.0 | 2.5 | -5.5 | 6.1 | 294.4 | 1.4 |
TABLE 2
| Categories | L* | a* | b* | c* | h° | △E |
| Comparative example 1 | 34.5 | -2.4 | -21.1 | 21.2 | 263.7 | — |
| Comparative example 2 | 56.7 | -4.5 | -20.8 | 21.3 | 257.8 | 22.3 |
| Comparative example 3 | 45.5 | -3.6 | -20.9 | 21.2 | 260.3 | 11.1 |
| Comparative example 4 | 29.2 | -1.0 | -17.4 | 17.4 | 266.8 | 6.6 |
| Example 1 | 31.3 | -1.0 | -20.3 | 20.3 | 267.2 | 3.6 |
| Example 2 | 31.6 | -1.5 | -21.1 | 21.1 | 266.0 | 3.0 |
| Example 3 | 24.5 | 0.5 | -18.5 | 18.5 | 271.7 | 10.7 |
The total amount of the caustic soda used in comparative examples 2 to 4 and examples 1 to 3 is as follows, based on comparative example 1 as the base number 1: 0.01, 1, 2.9, 1. The comparison between table 1 and table 2 shows that:
(1) comparative example 2 was dyed with only nitrogen gas, and although it had a certain dyeing effect, the dyeing depth was significantly inferior to that of example 1.
(2) Comparative example 3 the fabric depth before washing was deeper, but it was still worse than example 1, and the fabric faded significantly after washing.
(3) Under the condition that the amount of caustic soda and the amount of dye are the same, the color difference values of the finished cloth of the comparative examples 1 and 3 and the finished cloth of the examples 1 to 3 are obviously different, the color depth of the finished cloth of the examples 1 to 3 is obviously higher than that of the comparative examples 1 and 3, the ring dyeing effect is good, and the effect is more three-dimensional and clear after hand wiping and laser.
(4) Compared with the examples 1 to 3, the mercerization treatment is added, so that the glossiness and the dyeing depth of the yarns can be improved, but the problem of large chemical consumption exists, and therefore, the examples 1 to 3 can achieve the effect of obviously improving the dyeing depth when only a small amount of chemical consumption is added under the condition of reasonably controlling each step.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, so as to understand the technical solutions of the present invention specifically and in detail, but not to be understood as the limitation of the protection scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. It should be understood that the technical solutions provided by the present invention, which are obtained by logical analysis, reasoning or limited experiments, are within the scope of the appended claims. Therefore, the protection scope of the patent of the invention is subject to the content of the appended claims, and the description can be used for explaining the content of the claims.
Claims (10)
1. A method of dyeing yarn comprising the steps of:
respectively carrying out first dyeing and second dyeing on the yarn;
wherein the first dyeing comprises the following steps: contacting the yarn with a first dye solution in a nitrogen environment for dyeing; the oxidation-reduction potential value of the first dye solution is-680 mV to-840 mV, the pH value is 11 to 13, and the first dye solution contains dye and reducing agent;
the second dyeing comprises the following steps: contacting the yarn with a second dye liquor for dyeing; the oxidation-reduction potential value of the second dye solution is-680 mV to-840 mV, the pH value is 11 to 13, and the second dye solution contains dye and reducing agent.
2. A method of dyeing yarn according to claim 1, characterized in that the conditions providing the nitrogen atmosphere comprise: the outlet pressure of the nitrogen is 1 bar-3 bar, and the flow of the nitrogen is 40-45 m3/h。
3. The yarn dyeing method according to claim 1, characterized in that the concentration of the dye in the first dye liquor is 1-20 g/L, the concentration of the reducing agent is 0.05-0.5 g/L; and/or
The concentration of the dye in the second dye solution is 1-3 g/L, and the concentration of the reducing agent is 0.05-0.5 g/L.
4. A method of dyeing a yarn according to claim 1, characterized in that in the second dye liquor and/or the second dye liquor, the reducing agent is selected from one or more of sodium hydrosulfite, D-glucose powder and thiourea dioxide.
5. A method for dyeing a yarn according to any one of claims 1 to 4, characterized in that before the first dyeing and the second dyeing, one or more steps of pre-treatment, washing, drying and mercerization are further included.
6. The yarn dyeing method according to claim 5, characterized in that the pretreatment is carried out by treating the yarn with a pretreatment solution, wherein the pretreatment solution comprises a surfactant with a concentration of 5-10 g/L and caustic soda with a concentration of 4-7 g/L, and the treatment temperature is 60-90 ℃; and/or
The water washing refers to normal temperature water washing and/or hot water washing, and the hot water temperature of the hot water washing is 50-80 ℃; and/or
The drying conditions include: the temperature is 90-120 ℃; and/or
Mercerizing refers to treating yarns by using mercerizing liquid, and then washing and/or pickling; the mercerizing liquid comprises caustic soda with a concentration of 8-20 DEG Be and a surfactant with a concentration of 10-12 g/L.
7. A method of dyeing yarn according to claim 6 wherein the surfactant is selected from one or more of sodium lauryl sulfate, pimatin, M oil and OK oil.
8. A method of dyeing a yarn according to any one of claims 1 to 4, further comprising the steps of washing and/or drying after the first dyeing and the second dyeing.
9. The yarn dyeing method according to claim 1, characterized in that the washing is normal temperature washing and/or hot water washing, and the hot water temperature of the hot water washing is 50-80 ℃; and/or
The drying conditions include: the temperature is 90-120 ℃.
10. A method of dyeing a yarn according to any one of claims 1 to 4, wherein the fibers of the yarn are pure or blended yarns of cotton, viscose, lyocell, modal; and/or
The spinning mode of the yarn is ring spinning, air spinning or compact spinning, and the number of the yarn is 5-15 English.
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| CN111417310A (en) * | 2018-11-07 | 2020-07-14 | 乐佛拉泽有限责任公司 | Improved ring dyeing method and material prepared by same |
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| CN1498921A (en) * | 2002-11-11 | 2004-05-26 | 北京慧聚英力医药化学技术发展有限公 | Usage of indophenol salt in direct dyeing in situ |
| CN101018902A (en) * | 2004-07-29 | 2007-08-15 | 马斯特及龙基弗朗切斯科有限合伙两合公司 | Dyeing device and processes using and other colorants |
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