CN111058317A - Alkaline one-bath dip-dyeing method for chinlon 56 and cellulose fiber blended fabric - Google Patents
Alkaline one-bath dip-dyeing method for chinlon 56 and cellulose fiber blended fabric Download PDFInfo
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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
- D06P3/82—Textiles which contain different kinds of fibres
- D06P3/8204—Textiles which contain different kinds of fibres fibres of different chemical nature
- D06P3/8219—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and amide groups
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- 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
- D06P1/0032—Determining dye recipes and dyeing parameters; Colour matching or monitoring
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/22—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using vat dyestuffs including indigo
- D06P1/227—Specific dyes not provided for in groups D06P1/228 - D06P1/28
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- 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
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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
- D06P1/38—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
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Abstract
The invention provides an alkaline one-bath dip-dyeing method for a chinlon 56 and cellulose fiber blended fabric. The method comprises the following steps: dipping the object to be dyed in alkaline dye liquor for dyeing; the dye solution comprises a dye and a dyeing auxiliary agent; the dye is selected from any one of the following: vat, reactive, direct and sulfur dyes; the pH value of the dye solution is as follows: 7-10. After the dyeing process of the alkaline one-bath dip dyeing, the test results of the color fastness of the blended fabric such as friction resistance, washing resistance, sunlight resistance and the like can meet the use requirements, the friction resistance and the washing resistance can reach more than 3-4 levels, the sunlight color fastness can reach more than 5 levels, the heat-pressing color fastness can reach more than 4 levels, the process flow is simple, and the traditional two-bath method dyeing, energy conservation and emission reduction of the blended fabric are avoided.
Description
Technical Field
The invention belongs to the field of textile dyeing and finishing, and particularly relates to an alkaline one-bath dip-dyeing method for a chinlon 56 and cellulose fiber blended fabric.
Background
The nylon is the first synthetic fiber appearing in the world, the varieties are many, but the molecular structure contains the same amide group, the common varieties are that the nylon 6 is polycaprolactam, the nylon 66 is polymerized by hexamethylene diamine and adipic acid, the nylon 56 is a novel polyamide fiber, the nylon 66 is prepared by using petroleum and other derivatives as raw materials, the raw materials can be prepared by adopting a bio-based method, the pentamethylene diamine is prepared by fermenting various starches and straw cellulose by a biological engineering method, and the large-batch low-cost nylon can replace the hexamethylene diamine. The bio-based fiber has the excellent characteristics of environmental friendliness, renewable raw materials, biodegradation and the like, and is beneficial to solving the problems of serious resource and energy shortage, environmental pollution and the like in the current global economic and social development.
The advantages of cellulose fibers. Firstly, the raw materials are wide in source, the basic component is cellulose, the cellulose can be obtained by processing wood or cotton linter in nature, and the cellulose belongs to renewable resources; secondly, the wearability of the product is good, the cellulose fiber has the same chemical structure with natural fiber, the moisture absorption of the fiber reaches 8% -14%, new performance can be endowed through processing, and the wearing comfort is incomparable with that of common synthetic fiber; and thirdly, the cellulose fiber can be naturally degraded, is nontoxic, is easy to treat wastes, and cannot pollute the environment.
The cellulose fiber has better hygroscopicity, heat retention and comfort, but is easy to wrinkle, and the nylon fiber has good elasticity, high strength, light weight, wear resistance and good air permeability. After the two are blended, the fabric has the excellent performances of the cellulose fiber and the polyamide fiber and can overcome the respective defects, so that the fabric has better hygroscopicity, wrinkle resistance, wear resistance, rebound resilience and soft hand feeling, and is widely applied to the manufacture of various dress fabrics and decorative fabrics.
The traditional chinlon 66 and cellulose fiber blended fabric is difficult to dye, and is usually dyed by a dispersion/activity, dispersion/direct, acid/activity and other two-bath method, because the two fibers are different in acid and alkali applicable to dye baths, the cellulose fiber is usually dyed in an alkali dye bath, and the chinlon is basically not dyed under the same condition, so that the dyeing of the two fiber blended fabric is carried out step by step, the process is long, the energy consumption is excessive, and the color light of the two fibers in the blended fabric is easy to be inconsistent.
Disclosure of Invention
The invention aims to provide an alkaline one-bath dip-dyeing method for a chinlon 56 and cellulose fiber blended fabric.
The invention provides an alkaline one-bath dip-dyeing method for a chinlon 56 and cellulose fiber blended fabric, which comprises the following steps of: dipping the object to be dyed in alkaline dye liquor for dyeing;
wherein the object to be dyed is a woven or nonwoven fabric formed by nylon 56 fibers and cellulose fibers;
the woven fabric comprises woven fabric and knitted fabric;
the non-woven fabric is non-woven fabric;
in the object to be dyed, the chinlon 56 fiber can be a bio-based chinlon 56 fiber specifically;
the mass percent of the nylon 56 fiber is 10-90%, preferably 50-60%.
The end group content of the nylon 56 fiber has the following requirements:
the content of the terminal amino groups of the chinlon 56 fiber can be 20-80mol/106gr, preferably 20-60mol/106gr, more preferably 30-50mol/106gr；
The content of the terminal carboxyl of the nylon 56 fiber can be 50-110mol/106gr, preferably 60-90mol/106gr, more preferably 70-85mol/106gr。
The nylon 56 fiber can be prepared by a melt direct spinning method or a melt batch spinning method.
The end group value of the nylon 56 fiber is regulated and controlled in the polymerization process.
And adjusting the pH value of the chinlon 56 salt solution to 7.5-8.5, preferably 7.5-8.0.
The cellulose fiber can be one or more of cotton, hemp and regenerated cellulose fiber.
The dye solution comprises a dye and a dyeing auxiliary agent;
the dye liquor also comprises a solvent, and the solvent can be water.
The dye in the invention is selected from any one of the following: vat dyes, reactive dyes, direct dyes and sulphur dyes.
In the alkaline one-bath dip dyeing method, the steps of adopting the vat dye leuco body for dip dyeing are as follows: preparing vat dye liquor, adding the matter to be dyed, dip dyeing, oxidation treatment and post-dyeing treatment.
Wherein, the preparation of the vat dye liquor comprises the following steps: preparing a reducing solution and reducing a dye;
the dye reduction can adopt a dry cylinder reduction method or a full bath reduction method;
the dry vat reduction method comprises the following steps: according to a bath ratio of 1: 2-10, taking 2-8% (o.w.f) of dye dosage, adding 0-0.5% (o.w.f) of Turkey red oil, adding 2/3 (1-50 g/L) of caustic soda, 1-50 g/L of sodium hydrosulfite and 1/3 of water to prepare a dye reducing solution, and preparing the dye reducing solution at present (wherein 1-50 g/L of caustic soda and 1-50 g/L of sodium hydrosulfite are used as a vat dye dissolving agent, the same applies below);
the full bath reduction method comprises the following steps: according to a bath ratio of 1: 2-10, taking 2-8% (o.w.f) of dye, adding 0-0.5% (o.w.f) of Turkey red oil, 1-50 g/L of caustic soda, 1-50 g/L of sodium hydrosulfite and water to prepare a reducing solution, and preparing the reducing solution for use;
the dye reduction process can be carried out at 45-65 ℃ for 5-30 min;
the dip dyeing operation comprises the following steps: adding caustic soda into a reducing solution, adding a dyeing auxiliary agent (1/3 caustic soda, 1/3 sodium hydrosulfite and 2/3 water which are remained in dye reduction are also added at the moment of a dry vat reduction method) into the dyeing solution under an alkaline condition, adding a substance to be dyed, raising the temperature to the dyeing temperature of 40-90 ℃ at the temperature rise rate of (1-5) DEG C/min, preserving the temperature for 10-60 min, cooling, taking out a sample, performing oxidation treatment, and performing dyeing post-treatment to finish dyeing;
the oxidation treatment can adopt common methods such as cold water leaching (oxygen oxidation in water), ventilation oxidation (air oxidation), oxidant oxidation and the like.
The oxidant in the oxidant oxidation method comprises hydrogen peroxide, sodium perborate, sodium dichromate and the like, and the dosage of the oxidant is 1-5 g/L, and specifically comprises the following components: 4g/L of hydrogen peroxide;
the oxidation treatment process comprises the following steps: 40-60 ℃ for 10-60 min; specifically, the heat preservation treatment can be carried out for 15min at 50 ℃;
the dyeing post-treatment comprises hot water washing, soaping, hot water washing, normal-temperature water washing and drying;
and (3) hot water washing: 45-80 ℃;
the soaping process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of anhydrous sodium carbonate; soaping for 10-15 min at 50-80 ℃ with a bath ratio of 1: 5-15.
In the alkaline one-bath dip dyeing method, the steps when the reactive dye is adopted are as follows: preparing reactive dye solution at normal temperature, dip dyeing, fixing color and post-dyeing treatment.
Preparing the dye solution: bath ratio of dip dyeing: 1: 2-10, preparing 1-8% (o.w.f.) reactive dye and dyeing auxiliary agent into a dye solution, and adjusting the pH value of the obtained dye solution to 7-10;
the dip dyeing operation comprises the following steps: adding a substance to be dyed, heating to 40-60 ℃ in a dyeing machine at the speed of (1-5) ° C/min, preserving heat for 1-25 min, heating to 50-80 ℃ again, adding 1-50 g/L of a color fixing agent for color fixing, preserving heat for 10-40 min, cooling, taking out a sample, and performing dyeing post-treatment to finish dyeing;
the color fixing agent is an alkaline color fixing agent, and specifically can be sodium carbonate, sodium bicarbonate, sodium hydroxide and sodium phosphate;
the post-dyeing treatment comprises: hot water washing, soaping, hot water washing, room temperature water washing and air drying;
and (3) hot water washing: 45-80 DEG C
The soaping process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of sodium carbonate; soaping for 10-15 min at 50-80 ℃ with a bath ratio of 1: 5-15.
In the alkaline one-bath dip dyeing method, the steps when the direct dye is adopted are as follows: preparing direct dye solution, dip dyeing and post-dyeing treatment.
The dye solution is prepared by the following steps: bath ratio of dip dyeing: 1: 2-10, preparing 1-8% (o.w.f.) direct dye into a dye solution at normal temperature, and adjusting the pH value of the obtained dye solution to 7-8;
the dip dyeing operation comprises the following steps: adding a substance to be dyed, heating to 50-80 ℃ at the speed of (1-5) ° c/min, adding a dyeing auxiliary agent, preserving heat for 20-60 min, cooling, taking out a sample, and performing dyeing post-treatment to finish dyeing;
the post-dyeing treatment comprises: washing with hot water, washing with water at normal temperature, and air drying;
and (3) hot water washing: 45-80 ℃.
In the alkaline one-bath dip dyeing method, the steps when the sulfur dye is adopted are as follows: preparing a sulfur dye reduction dye solution, adding a to-be-dyed object for dip dyeing, carrying out oxidation color development, and carrying out dyeing post-treatment.
Preparing a sulfur dye reducing solution: the dyeing bath ratio is 1: 2-10, dye liquor is reduced, namely 20-100% (o.w.f.) reducing agent is added into 1-10% (o.w.f.) sulfur dye to be reduced into soluble leuco sodium salt, dyeing auxiliary agent is added, and the pH value of the solution is adjusted to 7-10;
the reducing agent can be sulfur, sodium sulfide, sodium polysulfide solution and the like;
the specific dyeing operation comprises the following steps: adding a substance to be dyed, preserving heat for 20-50 min at the temperature of 60-80 ℃, cooling, taking out a sample, carrying out oxidation color development treatment, and carrying out dyeing post-treatment to finish dyeing.
The oxidation color development is that the colored fabric is oxidized by the oxidant and becomes insoluble state to be fixed on the fiber, so that the fiber presents the required color.
The method for oxidation color development can be as follows: oxidizing by an oxidant, oxidizing by air,
the oxidant can be hydrogen peroxide, sodium perborate, potassium iodate, sodium bromate, sodium chlorite and the like; specifically, 1-10 g/L of hydrogen peroxide is soaked for 1-5 min;
the air oxidation specifically comprises cleaning fabric with cold water at normal temperature, and suspending in air for 10min for oxidation;
the post-dyeing treatment comprises: washing, preventing brittleness, washing with hot water, soaping, washing and drying;
the anti-brittleness is as follows: soaking the raw materials in an anti-embrittlement agent at room temperature;
the anti-brittle agent can be urea, Turkey red oil, soda ash, trisodium phosphate, bone glue, copper acetate, dicyandiamide, melamine, triethanolamine and the like, the dosage is 0.5-5% (o.w.f.), the agent is soaked for 1-10 min at room temperature, and the bath ratio is 1: 5-15;
and (3) hot water washing: 45-80 DEG C
The soaping process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of sodium carbonate; soaping for 10-15 min at 50-80 ℃ with a bath ratio of 1: 5-15.
The active dye can be halogenated s-triazine, halogenated pyrimidine, vinyl sulfone, composite (multi-active group), epoxy and azide;
the reactive dye can BE active brilliant blue BRV, active brilliant blue KN-R, active navy blue KE-R, active red M-RBE (vinyl sulfone), active red 3BS (monochlorotriazine and vinyl sulfone type), annomin bright yellow 4GL, annomin yellow 3RE 150%, annomin red 3BE 150%, annomin blue M-2GE, annomin brilliant blue RV 100%, annomin yellow brown NC, annomin red jade NC, annomin black NC, annomin red jade DR (bis-vinyl sulfone), active red KE-3B (bis-monochlorotriazine);
the direct dye can be azo, direct copper salt, copper salt complex direct dye, direct diazo, dioxazine and phthalocyanine;
specifically, the orange can BE directly orange S, directly scarlet 4BE, directly copper blue 2R, directly turquoise blue B2 RL;
the sulfur dye can be powder sulfur dye, sulfur reduction dye and sulfur polycondensation dye;
specifically, it can be blue sulfide BRN, red sulfide GGF, yellow sulfide GC, black sulfide 2 BR;
the dyeing auxiliary comprises: the dyeing auxiliary comprises a pH regulator, a vat dye dissolving agent, a sulfur dye dissolving agent, a chinlon dyeing rate regulator, a cellulose fiber dyeing rate regulator and the like, and the auxiliary agents have good functions of accelerating, leveling, permeating, dispersing, buffering and the like in a dye solution.
The vat dye dissolving agent can be 1-50 g/L sodium hydrosulfite and 1-50 g/L caustic soda;
the sulfur dye dissolving agent is sodium sulfide, which is generally 20-100% of the dye dosage;
the pH regulator can be acid, alkali, acidic oxide, alkaline oxide, weak acid strong alkali salt, and strong acid weak alkali salt.
The nylon dyeing rate regulator plays a role in retarding nylon dyeing in the dye liquor, and the cellulose fiber dyeing rate regulator plays a role in accelerating cellulose fiber in the dye liquor, so that the dyeing rates of the two fibers are basically consistent, and the dyeing uniformity of blended fabrics is achieved.
The chinlon dyeing rate regulator can be specifically a dye-release agent NLJ, a dye-release agent JV-905, a dye-release agent NL-90, a dye-release agent NL, a dye-release agent MCH-312, a dye-release agent GC-230, a dye-release agent JV-1 and a dye-release agent HJ-219;
the cellulose fiber dyeing rate regulator can be salt or anhydrous sodium sulphate;
the amount of the chinlon dyeing rate regulator can be 0.1-5% (o.w.f);
the cellulose fiber dyeing rate regulator can be used in the following amount: 1-15 g/L.
The invention provides an alkaline one-bath dip dyeing process, (1) dip dyeing of blended fabric can be completed by adopting a set of dye; the dyed fabric has bright color, deep color, identity and no phenomena of color, unevenness and the like; (2) the color fastness is good, the test results of the color fastness of the blended fabric such as rubbing resistance, washing resistance, sunlight resistance and the like can meet the use requirements, the rubbing resistance and the washing resistance can reach more than 3-4 grades, the sunlight resistance color fastness can reach more than 5 grades, and the heat-pressing resistance color fastness can reach more than 4 grades. (3) The dyeing process is simple, the traditional two-bath method dyeing of the blended fabric is avoided, and energy conservation and emission reduction are realized.
Drawings
FIG. 1 shows the dyeing effect of nylon 56 fibers with different terminal amino group contents, wherein the left graph is a sample No. 1, and the right graph is a sample No. 3.
FIG. 2 is a graph showing the effect of concentration of vat red 6B dye on K/S values on both sides of fabric and on the same color balance Q in example 2 of the present invention.
FIG. 3 is a graph of apparent depth (K/S value) of chinlon 56/cotton and chinlon 66/cotton blended fabric on one surface by adopting vat dyes RSN with different concentrations for dyeing.
Detailed Description
The present invention will be described below with reference to specific examples, but the present invention is not limited thereto.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; reagents, materials and the like used in the following examples are commercially available unless otherwise specified.
The warp and weft yarn specifications of the nylon 56 fiber and cotton blended fabric in the following embodiment are as follows: blending nylon 56/cotton at a blending ratio of 60/40; or the chinlon 56/flame-retardant viscose fiber is blended, and the blending ratio is 55/45; or the chinlon 56/hemp blended fabric, the blending ratio is 50/50.
The nylon 56 fiber adopted by the embodiment of the invention is prepared by the following method:
preparing a chinlon 56 salt water solution with the concentration of 50 wt% in a salt solution tank, and specifically comprising the following steps: adding 90kg of chinlon 56 dry salt into 55kg of desalted water, completely dissolving, and adjusting the pH value of a salt solution to 7.5-8.5. After preparing salt solution, heating a salt solution tank to 50 ℃, opening a feeding valve to inject the salt solution into a polymerization reaction kettle to start prepolymerization when the temperature reaches a set temperature, wherein the prepolymerization test conditions are as follows: the temperature in the reaction kettle is set to be 212 ℃, the pressure is 1.75MPa, the stirring speed is 60r/min, the reaction is carried out for 2 hours, and then the temperature is raised to be 250 ℃. And (3) when the temperature reaches 250 ℃, reducing the pressure for about 1h, raising the temperature of the reaction kettle to 270 ℃ while reducing the pressure, vacuumizing for about 10min, raising the temperature in the kettle to 275 ℃, completing the polymerization reaction, directly discharging materials, cooling by cold water and air blowing, and cutting by a granulator to obtain the chinlon 56 slices. Drying the slices at 80 ℃ for 22h, and setting spinning conditions as follows: the spinning temperature is 288 ℃, the rotating speed of a metering pump is 16rpm/min, the spinning speed is 1000m/min, the side blowing air pressure is 450pa, the concentration of a winding oiling agent F5103 is 5%, and the drafting multiple and the heating temperature are as follows: the first drawing ratio is 2.5-3.5; the secondary draft ratio is 1.01-1.42; the temperature of the drawing box is 170 ℃; the second pulling temperature is 180 ℃; the temperature of the hot plate is 200 ℃; and winding at the temperature of 180 ℃ to obtain the nylon 56 fiber.
The pH values of the different salt solutions are shown in Table 1 for different end groups and carboxyl contents of the fibers (the draft control is 3.5).
As can be seen from the data in Table 1, when the pH of the aqueous salt solution is less than 7.5, the terminal group content is low, and when the pH of the aqueous salt solution is greater than 8.5, the acid-amine ratio of the reaction raw material is unbalanced, and polymerization cannot be performed, so that the optimum pH range is 7.5 to 8.0.
TABLE 1 influence of different salt solution pH values on the terminal amino group content of nylon 56 fiber
Dyeing is carried out on a sample No. 1 and a sample No. 3, a dye active navy blue KE-R is selected, 2% (o.w.f.) of dye liquor is prepared, the pH value of the dye liquor is 7.3, and a leveling agent JV-1 of 1.5% (o.w.f.) is added, wherein the dyeing bath ratio is 1: 10. Adding 2g of dyed materials (1# and 3#) with different terminal amino group contents at normal temperature; and then heating to 50 ℃ at the heating rate of 2 ℃/min, preserving heat for 20min, heating to 65 ℃ again, adding 10g/L sodium bicarbonate for fixation, preserving heat for 15min, cooling, taking out a sample, washing with 50 ℃ hot water, soaping (2 g/L of soap chips, 10min of soaping at 50 ℃, bath ratio of 1:10), washing with 50 ℃ hot water, washing with room temperature water, and drying in the air to finish dyeing.
The staining effect is shown in FIG. 1, the left panel is sample # 1, and the right panel is sample # 3.
The two samples were tested for dye uptake and were: the staining rate of the sample No. 1 was 68.3%, and the staining rate of the sample No. 3 was 83.6%.
As can be seen from the table 1 and the figure 1, when the pH value is regulated to be 7.5-8.0, the amino-terminated value of the polyamide-56 fiber is high, and the dyeing effect is good.
According to the preparation scheme of the fibers, the chinlon 56 fibers with the salt solution pH of 7.85 are prepared, and the content of terminal amino groups is measured to be 45.2mol/106gr, carboxyl end group content 74.3mol/106gr, the following dyeing treatment was performed.
Specific example 1: homochromatism test of chinlon/cotton (60/40) blended fabric dyed by multiple different vat dyes
The blended fabric in this example has two types: one is nylon 56/cotton blended fabric of the invention, and the other is nylon 66 and cotton blended fabric sold in the market, and comparative tests are carried out.
Full-bath reduction: the bath ratio is 1:5, 2.5% (o.w.f) of dye vat dye, 2g/L of caustic soda, 3g/L of sodium hydrosulfite and water are reduced for 10min at 50 ℃ to prepare reducing liquid which is prepared for use;
the dip dyeing process comprises the following steps: adding 1% (o.w.f) leveling agent MCH-312 and 2g/L anhydrous sodium sulphate, adding 2g of the object to be dyed, heating to 60 ℃ at a speed of 2 ℃/min, preserving heat for 40min, cooling, taking out a sample, carrying out oxidation treatment in 4g/L hydrogen peroxide at 50 ℃ for 15min, taking out the sample, washing with hot water at 50 ℃, soaping (3 g/L of soap chips, 3g/L of anhydrous sodium carbonate, 50 ℃, 10min and a bath ratio of 1:10), washing with normal-temperature water, airing, and finishing dyeing. K/S values of both sides of the dyed fabric were measured, and the same color balance Q and delta E (CMC) were calculated. The results are shown in Table 2.
TABLE 2 homochromatism of blend fabrics dyed with vat dyes
As can be seen from the table 2, two vat dyes of three primary colors and black are selected, the blended fabric is dyed under the same dyeing condition, the same color balance value Q and the color difference delta E (CMC) of the dyed blended fabric are slightly different, and the vat yellow 3RT, vat red 6B, Kaida blue BS-03 and vat black GM dyes with good homochromy are selected to carry out dyeing tests on the commercially available chinlon 66/cotton under the same process, so that one surface of the chinlon 66 in the blended fabric is basically not dyed.
Example 2: reduction dye dry-vat-method reduction dip-dyeing chinlon 56/cotton (60/40) blended fabric
Dye dry vat reduction: according to the bath ratio of 1:5, taking 6% (o.w.f) of vat red 6B dye, firstly adding 2/3 total amount of caustic soda (5g/L), 5g/L sodium hydrosulfite and 1/3 total amount of water, reducing for 10min at 55 ℃ to prepare reducing liquid, and preparing the reducing liquid for use;
the dip dyeing process comprises the following steps: adding 1.5% (o.w.f) leveling agent MCH-312 and 5g/L anhydrous sodium sulphate, adding the rest 1/3 caustic soda, 1/3 sodium hydrosulfite and 2/3 water, adding 2g of to-be-dyed object, heating to 65 ℃ at the speed of 2 ℃/min, preserving heat for 40min, cooling, taking out a sample, carrying out oxidation treatment in 4g/L hydrogen peroxide at the temperature of 50 ℃ for 15min, taking out the sample, washing with hot water at the temperature of 60 ℃, soaping (3 g/L of soap chips, 3g/L of anhydrous sodium carbonate, 50 ℃, 10min, the bath ratio is 1:10), washing with normal-temperature water, airing, and finishing dyeing. The results of the experiment are shown in table 3.
And adjusting the concentration of the vat red 6B dye to investigate the influence of the concentrations of the vat red 6B dye with different concentrations on the K/S values of the two sides of the fabric and the same color balance value Q. The results are shown in FIG. 2, which is a graph of the effect of vat red 6B dye concentration on K/S values on both sides of the fabric and on the homochromatic balance Q. Wherein the abscissa represents the dye concentration in% (o.w.f).
With the increase of the dye concentration, the color difference delta E (CMC) between the nylon 56 surface and the cotton surface is continuously reduced, and when the dye concentration reaches 4 percent (o.w.f.), the dye concentration is reduced, and the color difference delta E (CMC) is not changed greatly. Whereas the Δ K/S of the fabric does not vary much with dye concentration.
Example 3: reduction dip-dyeing of chinlon 56/cotton (60/40) blended fabric by reduction dye full bath process
Reduction by a dye full bath method: according to the bath ratio of 1:5, 3% (o.w.f) of dye is taken to reduce RSN, and a specified amount of 2g/L of caustic soda, 3g/L of sodium hydrosulfite and water are reduced for 10min at 55 ℃ to prepare reducing liquid which is prepared for use;
the dip dyeing process comprises the following steps: adding 1.5% (o.w.f) leveling agent MCH-312 and 3g/L anhydrous sodium sulphate, adding 2g of the object to be dyed, heating to 65 ℃ at a speed of 2 ℃/min, keeping the temperature for 40min, cooling, taking out the sample, carrying out oxidation treatment in 4g/L hydrogen peroxide at 50 ℃ for 15min, taking out the sample, washing with hot water at 60 ℃, soaping (3 g/L of soap chips, 3g/L of anhydrous sodium carbonate, 50 ℃, 10min and a bath ratio of 1:10), washing with normal-temperature water, airing, and finishing dyeing.
The results of the experiment are shown in table 3.
Referring to the process flow, the nylon 56/cotton and nylon 66/cotton blended fabric is dyed by vat dyes RSN with different concentrations, and the apparent depth (K/S value) of one surface of the nylon is shown in figure 3.
Example 4 reactive dye Dip dyeing of Chinlon 56/Cotton (60/40) blend Fabric
Preparing a dye solution: dyeing bath ratio: 1:6, preparing a dye solution from 2.5% (o.w.f.) reactive brilliant blue BRV dye, 3g/L anhydrous sodium sulphate and 1% (o.w.f.) slow-dyeing agent JV-905, and adjusting the pH value of the obtained dye solution to 7.5;
the dyeing process comprises the following steps: adding 2g of an object to be dyed, heating to 55 ℃ at the speed of 1 ℃/min in a dyeing machine, preserving heat for 20min, heating to 65 ℃ again, adding 10g/L sodium bicarbonate for fixation, preserving heat for 15min, cooling, taking out a sample, washing with 60 ℃ hot water, soaping (2 g/L of soap chips, 10min of 60 ℃ soaping, bath ratio of 1:10), washing with 50 ℃ hot water, washing with room temperature water, and airing to finish dyeing;
the results of the experiment are shown in table 3.
Example 5 direct dye Dip-dyeing of Chinlon 56/flame-retardant viscose fiber (55/45) blend Fabric
Preparing a dye solution: dyeing bath ratio: 1:3, weighing 3% (o.w.f.) direct bright red 4BE dye at normal temperature, and adjusting the pH value of the obtained dye solution to 7.8;
the dyeing process comprises the following steps: adding 2g of an object to be dyed, heating to 80 ℃ at the speed of 5 ℃/min, adding 1.5% (o.w.f.) leveling agent JV-1 and 5g/L salt, keeping the temperature for 60min, cooling, taking out a sample, washing with hot water at 50 ℃, washing with normal-temperature water, and airing to finish dyeing;
the results of the experiment are shown in table 3.
Example 4: blended fabric of chinlon 56/China hemp fiber (50/50) dyed by sulfur dye
Preparing a sulfur dye reducing solution: weighing 2.5% (o.w.f.) of 150% of dye of thioblue 2RN (at room temperature), adding 100% (o.w.f.) of sodium sulfide to prepare a reduction solution of the sulfur dye, adding 0.5% (o.w.f.) of leveling agent HJ-219 and 4g/L of salt, and adjusting the pH value of the solution to 8.0;
the dyeing process comprises the following steps: adding 2g of an object to be dyed, keeping the temperature at 80 ℃ for 50min, cooling, taking out a sample, hanging in the air for 10min for oxidation treatment, cleaning the sample, performing anti-brittleness treatment (3% (o.w.f.) urea, 3% (o.w.f.) Turkey red oil, a bath ratio of 1:10, soaking at room temperature for 5min), washing with 50 ℃ hot water, soaping (2 g/L of soap chips, 10min of soaping at 50 ℃ and a bath ratio of 1:10), washing with room temperature water, and drying in the air to finish dyeing.
The results of the experiment are shown in Table 3
TABLE 3 color fastness test results after dyeing with different dyes
The vat dye, the reactive dye, the direct dye and the sulfur dye can well dye the blended fabric of the chinlon 56 and the cellulose fiber under the alkaline one-bath condition, the dyed blended fabric has the same property, and various dyes are bright in color, complete in chromatogram and excellent in color fastness after being dyed, and can meet daily use.
Comparative example 1
Dye dry vat reduction: according to the bath ratio of 1:5, taking 6% (o.w.f) of vat red 6B dye, firstly adding 2/3 total amount of caustic soda (5g/L), 5g/L sodium hydrosulfite and 1/3 total amount of water, reducing for 10min at 55 ℃ to prepare reducing liquid, and preparing the reducing liquid for use;
the dip dyeing process comprises the following steps: adding the rest 1/3 caustic soda, 1/3 sodium hydrosulfite and 2/3 water, adding 2g of a to-be-dyed object, heating to 65 ℃ at a speed of 2 ℃/min, preserving heat for 40min, cooling, taking out a sample, carrying out oxidation treatment in 4g/L hydrogen peroxide at 50 ℃ for 15min, taking out the sample, washing with hot water at 60 ℃, soaping (3 g/L of soap chips, 3g/L of anhydrous sodium carbonate, 50 ℃, 10min, and a bath ratio of 1:10), washing with normal temperature water, airing, and finishing dyeing.
The homochromatism of the dyed blended fabric is shown in table 4.
Comparative example 2
Dye dry vat reduction: according to the bath ratio of 1:5, taking 6% (o.w.f) of vat red 6B dye, firstly adding 2/3 total amount of caustic soda (5g/L), 5g/L sodium hydrosulfite and 1/3 total amount of water, reducing for 10min at 55 ℃ to prepare reducing liquid, and preparing the reducing liquid for use;
the dip dyeing process comprises the following steps: adding 5g/L anhydrous sodium sulphate, the rest of 1/3 caustic soda, 1/3 sodium hydrosulfite and 2/3 water, adding 2g of a substance to be dyed, heating to 65 ℃ at the speed of 2 ℃/min, keeping the temperature for 40min, cooling, taking out a sample, carrying out oxidation treatment in 4g/L hydrogen peroxide at the temperature of 50 ℃ for 15min, taking out the sample, washing with hot water at the temperature of 60 ℃, soaping (3 g/L of soap chips, 3g/L of anhydrous sodium carbonate, 50 ℃, 10min and the bath ratio of 1:10), washing with normal temperature water, airing, and finishing dyeing.
The homochromatism of the dyed blended fabric is shown in table 4.
Comparative example 3
Dye dry vat reduction: according to the bath ratio of 1:5, taking 6% (o.w.f) of vat red 6B dye, firstly adding 2/3 total amount of caustic soda (5g/L), 5g/L sodium hydrosulfite and 1/3 total amount of water, reducing for 10min at 55 ℃ to prepare reducing liquid, and preparing the reducing liquid for use;
the dip dyeing process comprises the following steps: adding 1.5% (o.w.f) of a leveling agent MCH-312, adding 1/3 caustic soda, 1/3 sodium hydrosulfite and 2/3 water in balance, adding 2g of a substance to be dyed, heating to 65 ℃ at a speed of 2 ℃/min, preserving heat for 40min, cooling, taking out a sample, carrying out oxidation treatment in 4g/L hydrogen peroxide at a temperature of 50 ℃ for 15min, taking out the sample, washing with 60 ℃ hot water, soaping (3 g/L of soap chips, 3g/L of anhydrous sodium carbonate, 50 ℃, 10min, a bath ratio of 1:10), washing with normal temperature water, airing, and finishing dyeing.
The homochromatism of the dyed blended fabric is shown in table 4.
TABLE 4 homochromatism of blend fabrics dyed with vat dyes
Claims (10)
1. An alkaline one-bath dip-dyeing method for a chinlon 56 and cellulose fiber blended fabric comprises the following steps: dipping the object to be dyed in alkaline dye liquor for dyeing;
wherein the object to be dyed is a woven or nonwoven fabric formed by nylon 56 fibers and cellulose fibers;
in the object to be dyed, the mass percent of the nylon 56 fiber is 10-90%;
the dye solution comprises a dye and a dyeing auxiliary agent;
the dye is selected from any one of the following: vat, reactive, direct and sulfur dyes;
the pH value of the dye solution is as follows: 7-10.
2. The method of claim 1, wherein: in the object to be dyed, the mass percent of the nylon 56 fiber is 10-90%;
the end group content of the nylon 56 fiber has the following requirements:
the content of terminal amino groups of the chinlon 56 fiber is 20-80mol/106gr, preferably 20 to 60mol/106gr, more preferably 30 to 50mol/106gr；
The content of terminal carboxyl groups of the chinlon 56 fiber is 50-110mol/106gr, preferably 60 to 90mol/106gr, more preferably 70 to 85mol/106gr；
The cellulose fiber is one or more of cotton, hemp and regenerated cellulose fiber.
3. The method according to claim 1 or 2, characterized in that: adopting vat dye leuco body for dip dyeing, wherein the method comprises the following steps: preparing vat dye liquor, adding a to-be-dyed object for dip dyeing, oxidation treatment and post-dyeing treatment;
wherein, the preparation of the vat dye liquor comprises the following steps: preparing a reducing solution and reducing a dye;
the dye reduction adopts a dry cylinder reduction method or a full bath reduction method;
the dry vat reduction method comprises the following steps: according to a bath ratio of 1: 2-10, taking 2-8% (o.w.f) of dye dosage, adding 0-0.5% (o.w.f) of Turkey red oil, adding 2/3 (1-50 g/L) of caustic soda, 1-50 g/L of sodium hydrosulfite and 1/3 of water for total dyeing dosage to prepare a dye reducing solution;
the full bath reduction method comprises the following steps: according to a bath ratio of 1: 2-10, taking 2-8% (o.w.f) of dye, adding 0-0.5% (o.w.f) of Turkey red oil, 1-50 g/L of caustic soda, 1-50 g/L of sodium hydrosulfite and water to prepare a reducing solution;
the dye reduction process is carried out at 45-65 ℃ for 5-30 min;
the dip dyeing operation comprises the following steps: adding a dyeing auxiliary agent, adding an object to be dyed, raising the temperature to 40-90 ℃ at a heating rate of (1-5) ° C/min, preserving the temperature for 10-60 min, cooling, taking out a sample, performing oxidation treatment, and performing dyeing post-treatment to finish dyeing;
the oxidation treatment adopts common methods of cold water leaching, ventilated oxidation and oxidant oxidation; specifically, the oxidant in the oxidant oxidation method comprises hydrogen peroxide, sodium perborate and sodium dichromate, and the dosage of the oxidant is 1-5 g/L, and more specifically: 4g/L of hydrogen peroxide;
the oxidation treatment process comprises the following steps: 40-60 ℃ for 10-60 min; specifically, the heat preservation treatment can be carried out for 15min at 50 ℃;
the dyeing post-treatment comprises hot water washing, soaping, hot water washing, normal-temperature water washing and drying;
and (3) hot water washing: 45-80 ℃;
the soaping process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of anhydrous sodium carbonate; soaping for 10-15 min at 50-80 ℃ with a bath ratio of 1: 5-15.
4. The method according to any one of claims 1-3, wherein: when the dye is a reactive dye, the alkaline one-bath dip dyeing method comprises the following steps: preparing reactive dye solution at normal temperature, dip dyeing, fixing color and post-dyeing treatment;
preparing the dye solution: bath ratio of dip dyeing: 1: 2-10, preparing 1-8% (o.w.f.) reactive dye and dyeing auxiliary agent into a dye solution, and adjusting the pH value of the obtained dye solution to 7-10;
the dip dyeing operation comprises the following steps: adding a substance to be dyed, heating to 40-60 ℃ in a dyeing machine at the speed of (1-5) ° C/min, preserving heat for 1-25 min, heating to 50-80 ℃ again, adding 1-50 g/L of a color fixing agent for color fixing, preserving heat for 10-40 min, cooling, taking out a sample, and performing dyeing post-treatment to finish dyeing;
the color fixing agent is an alkaline color fixing agent, and specifically can be sodium carbonate, sodium bicarbonate, sodium hydroxide and sodium phosphate;
the post-dyeing treatment comprises: hot water washing, soaping, hot water washing, room temperature water washing and air drying;
and (3) hot water washing: 45-80 ℃;
the soaping process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of sodium carbonate; soaping for 10-15 min at 50-80 ℃ with a bath ratio of 1: 5-15.
5. The method according to any one of claims 1-4, wherein: when the dye is a direct dye, the alkaline one-bath dip dyeing method comprises the following steps: preparing direct dye solution, dip dyeing and post-dyeing treatment;
the dye solution is prepared by the following steps: bath ratio of dip dyeing: 1: 2-10, preparing 1-8% (o.w.f.) direct dye into a dye solution at normal temperature, and adjusting the pH value of the obtained dye solution to 7-8;
the dip dyeing operation comprises the following steps: adding an object to be dyed, heating to 50-80 ℃ at the speed of (1-5) DEG C/min, adding a dyeing auxiliary agent, preserving the heat for 20-60 min, cooling, taking out a sample, and performing dyeing post-treatment to finish dyeing;
the post-dyeing treatment comprises: washing with hot water, washing with water at normal temperature, and air drying;
and (3) hot water washing: 45-80 ℃.
6. The method according to any one of claims 1-5, wherein: when the dye is a sulfur dye, the alkaline one-bath dip dyeing method comprises the following steps: preparing a sulfur dye reduction dye solution, adding a to-be-dyed object for dip dyeing, and carrying out oxidation color development and dyeing post-treatment;
preparing a sulfur dye reducing solution: the dyeing bath ratio is 1: 2-10, dye liquor is reduced, namely 20-100% (o.w.f.) reducing agent is added into 1-10% (o.w.f.) sulfur dye to be reduced into soluble leuco sodium salt, dyeing auxiliary agent is added, and the pH value of the solution is adjusted to 7-10;
the reducing agent is sulfur, sodium sulfide or sodium polysulfide solution;
the dyeing operation comprises the following steps: adding a substance to be dyed, preserving heat for 20-50 min at the temperature of 60-80 ℃, cooling, taking out a sample, carrying out oxidation color development treatment, and carrying out dyeing post-treatment to finish dyeing;
the oxidation color development method comprises the following steps: oxidizing with an oxidizing agent or air;
specifically, the oxidant is hydrogen peroxide, sodium perborate, potassium iodate, sodium bromate and sodium chlorite; specifically, 1-10 g/L of hydrogen peroxide is soaked for 1-5 min;
the air oxidation specifically comprises cleaning fabric with cold water at normal temperature, and suspending in air for 10min for oxidation;
the post-dyeing treatment comprises: washing, preventing brittleness, washing with hot water, soaping, washing and drying;
the anti-brittleness is as follows: soaking the raw materials in an anti-embrittlement agent at room temperature;
the anti-embrittlement agent is: at least one of urea, Taigu oil, soda ash, trisodium phosphate, bone glue, copper acetate, dicyandiamide, melamine and triethanolamine, wherein the dosage of the at least one of urea, Taigu oil, soda ash, trisodium phosphate, bone glue, copper acetate, dicyandiamide, melamine and triethanolamine is 0.5-5% (o.w.f.), and the soaking is carried out at room temperature for 1-10 min, and the bath ratio is 1: 20-60;
and (3) hot water washing: 45-80 ℃;
the soap boiling process comprises the following steps: 1-5 g/L of soap flakes and 0-3 g/L of sodium carbonate; soaping for 10-15 min at 50-80 ℃ with a bath ratio of 1: 5-15.
7. The method according to any one of claims 1-6, wherein: the vat dye is at least one of an indigoid vat dye, a condensed ring ketone vat dye and a temporary soluble vat dye;
the active dye is halogenated s-triazine, halogenated pyrimidine, vinyl sulfone, composite multi-active group, epoxy and azide;
the direct dye is azo, direct copper salt, copper salt complex direct dye, direct diazo, dioxazine and phthalocyanine;
the sulfur dye is powder sulfur dye, sulfur reduction dye or sulfur polycondensation dye.
8. The method according to any one of claims 1-7, wherein: the dyeing auxiliary comprises: a pH regulator, a vat dye dissolving agent, a sulfur dye dissolving agent, a chinlon dyeing rate regulator and a cellulose fiber dyeing rate regulator;
wherein the vat dye dissolving agent is 1-50 g/L sodium hydrosulfite and 1-50 g/L caustic soda;
the sulfur dye dissolving agent is sodium sulfide, and accounts for 20-100% of the dye.
9. The method of claim 8, wherein: the nylon dyeing rate regulator is a dye-release agent NLJ, a dye-release agent JV-905, a dye-leveling agent NL-90, a dye-leveling agent NL, a dye-leveling agent MCH-312, a dye-leveling agent GC-230, a dye-leveling agent JV-1 and a dye-leveling agent HJ-219;
the cellulose fiber dyeing rate regulator is edible salt or anhydrous sodium sulphate.
10. The method according to any one of claims 1-9, wherein: the amount of the chinlon dyeing rate regulator is 0.1-5% (o.w.f);
the dosage of the cellulose fiber dyeing rate regulator is as follows: 1-15 g/L.
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