CN111809412A - Low-temperature one-bath one-step dyeing method for chinlon 56 and protein fiber blended fabric - Google Patents
Low-temperature one-bath one-step dyeing method for chinlon 56 and protein 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
- 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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- 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
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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
- D06P1/39—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 acid 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
- 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
- D06P3/8209—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing amide groups
Abstract
The invention discloses a method for dip-dyeing a nylon 56 fiber and protein fiber blended fabric at a low temperature in one bath and in one step. The method comprises the following steps: the acid dye, the neutral dye or the reactive dye is adopted to dip-dye the dyed object. The invention (1) realizes the one-bath one-step dyeing of the same dye set of the blend fiber; (2) the color fastness is good, the color fastness test results of the dyed 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, and the sunlight resistance color fastness can reach more than 6 grades. (3) The method is a dyeing method for rapid dyeing at low temperature in a short time, the damage of the fiber in the dyeing process is effectively reduced by low-temperature dyeing, the weight loss rate of the fiber is reduced, the improvement of the finished product yield of the post-process is facilitated, the process flow is simple, and the energy is saved and the emission is reduced.
Description
Technical Field
The invention belongs to the field of textile dyeing and finishing, and particularly relates to a low-temperature one-step dyeing method for a chinlon 56 and protein fiber blended fabric.
Background
The nylon fabric is the first synthetic fiber appearing in the world, the varieties of the nylon fabric are many, but the molecular structure of the nylon fabric contains the same amide group, the common varieties are that nylon 6 is polycaprolactam, nylon 66 is formed by polymerizing hexamethylene diamine and adipic acid, nylon 56 is novel polyamide fiber, the nylon fabric is different from nylon 66 in that a petroleum raw material is used, the raw material used is a biological raw material, the pentamethylene diamine is prepared by fermenting various starches and straw cellulose through a biological engineering method, and the large-batch low-cost nylon fabric 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.
Wool, silk and other natural and regenerated protein fibers are hydrophilic fibers, the amino and carboxyl groups of which can be replaced by-NH, respectively+and-COO-The ionic form, in combination with the anionic or cationic dye, can also form a covalent bond with the reactive dye. Protein fiber is not alkali-resistant, and dyeing is preferably carried out in acidic or near-neutral dye liquor.
The acid dye is generally aromatic sodium sulfonate salt, contains sulfonic acid group, hydroxyl group and other groups, and a few sodium carboxylate salts are ionized in water to form cellulose acid anions which can be combined with amino groups or amide groups on fibers, so that the acid dye can be used for dyeing protein fibers such as wool and silk and polyamide (chinlon) synthetic fibers. The neutral dye (1:2 type acidic mordant-containing dye) is prepared by complexing two dye molecules and a metal atom, has the same dyeing principle as the acidic dye for neutral bath dyeing, and can be used for dyeing wool, silk, nylon, etc. in slightly acidic and neutral medium. During dyeing, the combination between dye and fiber is mainly ion bond, intermolecular force and hydrogen bond.
The dyeing properties of the two components in the chinlon and wool blended fabric are different, and two-step dyeing is generally adopted to prevent the conditions of uneven dyeing, color difference and the like. In addition, the two-step dyeing method has the advantages of high energy consumption, long dyeing time, high water and electricity consumption and high cost. Therefore, the research on the one-bath one-step dip dyeing method of the chinlon 56 fiber and protein fiber blended fabric has important practical significance.
Disclosure of Invention
The invention aims to provide a method for dip-dyeing a nylon 56 fiber and protein fiber blended fabric at low temperature in one bath and in one step.
The invention provides a method for dyeing a blended fabric of nylon 56 fiber and protein fiber by one-step dip dyeing at low temperature in one bath, which comprises the following steps: carrying out dip dyeing on a dyed object by adopting an acid dye, a neutral dye or a reactive dye;
wherein the dyed object is a blended fabric or a non-woven fabric formed by the chinlon 56 fiber and the protein fiber.
The blended fabric in the present invention includes woven and non-woven fabrics, including woven fabrics and knitted fabrics.
The woven fabric is formed by mutually vertical yarns of two systems (or directions) and interweaving the yarns according to a certain rule.
The knitted fabric is formed in a different manner from woven fabric, and may be classified into weft knitted fabric and warp knitted fabric according to the production manner.
The non-woven fabric is also called non-woven fabric, and is formed by forming a fiber web structure by directionally or randomly arranging textile short fibers or filaments and then reinforcing the fiber web structure by adopting a mechanical method, a thermal bonding method or a chemical method and the like.
The mass percentage of the chinlon 56 fiber in the dyed material is 10-90%, preferably 45-65%.
The end group content of the nylon 56 fiber has the following requirements:
the above-mentionedThe content of the terminal amino groups of the chinlon 56 fiber can be 20-80 mol/106gr, preferably 20 to 60mol/106gr, more preferably 45 to 55mol/106gr；
The content of terminal carboxyl groups of the chinlon 56 fiber can be 50-110 mol/106gr, preferably 60 to 90mol/106gr, more preferably 65 to 75mol/106gr。
The crystallinity of the nylon 56 fiber can be 30-70%, preferably 45-65%, and more preferably 50-65%.
The nylon 56 fiber can be prepared by a melt direct spinning method or a melt intermittent spinning method;
and adjusting the pH value of the chinlon 56 saline solution to 7.5-8.5, preferably 7.5-8.0.
And adjusting the draft multiple to be 1.1-5 times to realize the adjustment of the crystallinity.
The regulation and control of the end group value of the nylon 56 fiber are realized in the polymerization process, and the crystallinity is regulated and controlled in the spinning process.
The protein fiber includes animal protein fiber such as wool, rabbit hair, silk, casein protein fiber, silkworm pupa protein fiber, pearl protein fiber or milk protein fiber; vegetable protein fibers, for example, peanut protein fibers, corn protein fibers, soy protein fibers, or combinations thereof.
In the dip dyeing method, the steps of dyeing with the acid dye or the neutral dye are as follows:
preparing the acid dye or the neutral dye into a dye solution, regulating the pH value to 2.0-6.8 according to a bath ratio of 1: 2-10, adding a dyeing auxiliary agent, adding the dyed object into the dye solution for dyeing at room temperature (25-30 ℃), then heating to 30-80 ℃ at the speed of (1-5) DEG C/min, preserving heat for 1-20 min, cooling to room temperature, and carrying out dyeing post-treatment.
In the dyeing with the acid dye or the neutral dye, the bath ratio can be 1:3 and 1:5, the pH value can be 3.0 and 4.0, and the temperature rise condition can be that the temperature rise rate is 1.0 ℃/min or 1.5 ℃/min to 60 ℃.
In the dip dyeing method, the steps of dyeing by using the reactive dye are as follows:
preparing the reactive dye into a dye solution, adding 1-20g/L of anhydrous sodium sulphate (liquid preparation or constant temperature process addition) according to a bath ratio of 1: 2-10, adding a dyeing auxiliary agent, regulating the pH value to 2.0-6.5, adding the dyed object at room temperature (25-30 ℃), heating to 30-50 ℃, keeping the temperature for 1-25 min, then continuously heating to 50-80 ℃ at a speed of (1-5) ° c/min, adding a color fixing agent for fixing color for 5-25 min, cooling to room temperature, and carrying out dyeing post-treatment.
In the dyeing by adopting the reactive dye, the bath ratio can be 1:2, the pH value can be 4.5, and the using amount of the anhydrous sodium sulphate is 5 g/L; the temperature rise condition can be specifically that the temperature is raised to 70 ℃ at the temperature rise rate of 1.0 ℃/min; the color fixing condition can be specifically that the color fixing agent is added for color fixing for 20min after the temperature is raised to 70 ℃ at the speed of 1.5 ℃/min.
The color fixing agent can be a surfactant (cationic), a quaternary ammonium salt without surface activity, a resin type color fixing agent, a cross-linking color fixing agent, a formaldehyde-free color fixing agent and the like, and specifically can be a color fixing agent Y, sodium carbonate or caustic soda.
The fixation conditions are as follows: the color fixing agent is 1-5 g/L, and the bath ratio is 1: 2-10.
The dosage of the acid dye, the neutral dye or the reactive dye is 1-6% (o.w.f.), and specifically 2% and 4%.
Specifically, the acid dye may be at least one of azo acid dye, anthraquinone acid dye, triarylmethane acid dye, xanthene acid dye and nitro acid dye;
the acid dye can be acid red NHFS, acid yellow NHFS, acid blue NHFS, F type weakly acidic dye, acid bright red FG, acid yellow G, acid yellow AD, acid red AD, acid gray AD, weakly acidic bright red FG or weakly acidic blue 5R.
Specifically, the neutral dye can be a 1:2 type metal complex dye in an acidic mordant-containing dye, and specifically can be an Annosatel M type metal complex dye and an S type metal complex dye.
The neutral dye may be neutral deep yellow GL, neutral gray 2BL, neutral yellow 2R, neutral soy red B, neutral blue 2R, neutral brown B, neutral gray G, neutral red GAL, neutral Tibetan BR, neutral black AW 200%, neutral yellow TB, neutral yellow R, neutral red 3B, neutral red 10B, neutral red 3G, neutral turquoise blue G, neutral blue R or neutral blue RAWL.
Specifically, the reactive dye can be a chlorotriazine reactive group reactive dye, a vinylsulfone reactive group reactive dye, a multi-reactive group reactive dye, a bromoacrylamide reactive group reactive dye, an epoxy reactive dye or an azide reactive dye;
reactive dyes of the chloro-s-triazine reactive group: a reactive dye K-6G; vinyl sulfones: a reactive dye K-NR; multiple active groups: reactive brilliant red M-3 BE; brominated acrylamides: lanoline blue 3G, reactive red 83, reactive yellow 39, reactive blue 69, annofel red ARC, annofel yellow/golden ARC, annofel blue ARC; reactive dyes for wool of unknown structure: bright yellow WG, active bright red WG, active brilliant blue WR, active black WG.
Specifically, the dyeing auxiliary can be a pH regulator, a chinlon dyeing rate regulator and/or a protein fiber dyeing rate regulator;
the pH regulator can be acid, alkali, acidic oxide, alkaline oxide, weak acid strong base salt, strong acid weak base salt, etc., such as 1% aqueous solution of acetic acid, sodium hydroxide, calcium oxide, sodium carbonate, ammonium chloride, etc.;
the nylon dyeing rate regulator plays a role in retarding and stopping dyeing of nylon fibers dyed by dye in a dye solution, and the protein fiber dyeing rate regulator plays a role in accelerating dyeing of protein fibers in the dye solution, so that the dyeing rates of the two fibers are basically consistent, and the dyeing uniformity of blended fabrics is achieved.
The polyamide dyeing rate regulator can be specifically peregal O, a leveling agent JV-905, a leveling agent JV-1, a leveling agent SET, a leveling agent HJ-219, a leveling agent NL, a slow-dyeing agent NLJ, a slow-dyeing agent NLJ-287, a dye-retarding agent RF and a dye-retarding agent FK-450A;
the protein fiber dyeing rate regulator can be an accelerating agent TGR-M, an accelerating agent WDS, an accelerating agent KD, an accelerating agent WDP, an accelerating agent W-201 or an accelerating agent DW;
the amount of the polyamide dyeing rate regulator and/or the protein fiber dyeing rate regulator can be 0.1-5% (o.w.f.).
According to a specific embodiment of the present invention, the dye is an acid dye (such as an einier red a-2BF dye), and the auxiliaries used are: a dye blocker RF 4% (o.w.f.) and an accelerant KD 2.5% (o.w.f.).
According to a specific embodiment of the present invention, the dye is a neutral dye (e.g. M-type dye mauve B or neutral black AW 200%), and the following auxiliaries are used: retarding agent NLJ-2870.5% (o.w.f.), accelerating agent TGR-M2% (o.w.f.).
According to a specific embodiment of the present invention, the dye is a reactive dye (such as annomin bright yellow 4GL), and the following auxiliary agents are adopted: leveling agent JV-11% (o.w.f.), accelerating agent WDP 2% (o.w.f.)
In the acid bath dip dyeing method, after the dyeing step, a post-treatment step is further included;
the post-treatment after dyeing by the acid dye and the neutral dye comprises the following steps: washing with hot water, washing with water and drying in the air;
and (3) hot water washing: washing with hot water at 40-60 ℃ for 1-3 times;
and (3) washing: washing with room temperature water for 1-3 times;
the post-treatment after dyeing by the reactive dye comprises the following steps: hot water washing, soaping, water washing and air drying;
and (3) hot water washing: washing with hot water at 40-60 ℃ for 1-3 times;
and (3) washing: washing with room temperature water for 1-3 times;
the soaping conditions were as follows: 1-5 g/L of soap powder, 50-80 ℃, 5-10 min of time, 1: 10.
aiming at the conditions that in the prior art, on one hand, the dyeing rate of dyed chinlon 56 fiber and protein fiber (such as wool fiber) is different under the same condition, so that the blended fabric needs to be dyed by adopting a two-bath two-step method, the stability of the dyeing process is poor, and the color difference is easy to generate; on the other hand, the two-bath two-step dyeing has the defects of high energy consumption, long time, high cost and the like. The invention provides a one-bath one-step dip dyeing process for a nylon 56 fiber and protein fiber blended fabric by adopting an acid dye, a neutral dye or a reactive dye under an acid condition, and has the advantages that (1) the one-bath one-step dyeing of the same dye set of the blended fiber is realized; (2) the color fastness is good, the color fastness test results of the dyed 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, and the sunlight resistance color fastness can reach more than 6 grades. (3) The method is a dyeing method for rapid dyeing at low temperature in a short time, the damage of the fiber in the dyeing process is effectively reduced by low-temperature dyeing, the weight loss rate of the fiber is reduced, the improvement of the finished product yield of the post-process is facilitated, the process flow is simple, and the energy is saved and the emission is reduced.
Drawings
FIG. 1 shows the dyeing effect of nylon 56 fibers with different terminal amino group contents; the left side is the staining results for sample # 1 and the right side is the staining results for sample # 4.
FIG. 2 is a graph showing the percentage of dye uptake of acid dye (Elille Red A-2BF) at 60 ℃ for chinlon 56 and wool.
FIG. 3 is a dye-uptake rate curve of 60 ℃ acid bath neutral dye (M type mauve B) for respectively dyeing nylon 56 and wool fiber.
FIG. 4 shows the dye uptake curves of 65 ℃ acid bath reactive dye (Anofixix red ARC) for nylon 56 and wool fibers, respectively.
Fig. 5 is a photograph of a wool one-bath dyeing result of the acid dye PA 56.
Detailed Description
The present invention is described below with reference to specific embodiments, but the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The nylon used in the following examples was a commercially available nylon 66 having a terminal amino group content of 46mol/106gr。
The K/S value of the surface color depth of the dyed fabric in the following examples is measured by a Data color 500 computer color separation color difference meter, and a D65 light source and a small aperture are selected. When the surface color depth of the dyed fabric is measured, 4 points are uniformly taken on the dyed fabric, and K/S values are respectively measured and averaged. The color depth difference of the two sides of the fabric is delta K/S, and the larger the delta K/S is, the larger the color difference is.
The dye uptake was determined as described in the following examples:
and (3) respectively measuring the absorbance of the dye solution before and after dyeing at the maximum absorption wavelength by using a spectrophotometer, and calculating the dyeing percentage according to the following formula: ct ═ 1-A1/A0) X 100% (wherein: a. the0The absorbance of the original dye solution is obtained; a. the1The absorbance of the residue after dyeing was used. )
The blend ratio of nylon 56 to wool blend fabric used in the examples described below was 55/45.
In the quantitative tests in the following examples, three replicates were set up and the results averaged.
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 ℃; the temperature of the three-pulling process is 180 ℃. And (4) winding 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
The method comprises the steps of dyeing a 1# sample and a 3# sample, selecting neutral gray 2BL of a dye, preparing 1% (o.w.f.) dye liquor, enabling the pH value of the dye liquor to be 6.8, adding a leveling agent, and adding 0.5% (o.w.f.) of O, wherein the dyeing bath ratio is 1: 10. Adding the dyed materials (1# and 3#) with different terminal amino group contents at normal temperature; then heating to 70 ℃ at the heating rate of 2 ℃/min, and preserving the heat for 20min to finish dyeing. And cooling the dye liquor to normal temperature, taking out the sample, washing the sample for 1 time at 50 ℃ with warm water, washing the sample for 1 time with cold water at normal temperature, and air-drying the sample.
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.
The different degrees of crystallinity of the fibers corresponding to different draw ratios are shown in table 2 (controlling the pH value of the saline solution of the chinlon 56 to be 7.85).
The obtained nylon 56 fiber was dyed in the above manner, and the dye uptake was as shown in table 2.
TABLE 22 influence of different draft factors on the crystallinity of Nylon 56 fiber
| Sample No. 2 | Degree of crystallinity (%) | The dye uptake rate% |
| [ PA56 draft multiple 2 | 56.8 | 84.3 |
| ② PA56 draft multiple 3.4 | 64.0 | 78.9 |
As can be seen from the data in table 2, the greater the crystallinity of the fiber, the smaller the amorphous region of the fiber, i.e., the less dye that can enter the interior of the fiber, and the less effective the fiber dyeing.
According to the fiber preparation scheme, the nylon 56 fiber with the salt solution pH of 7.85, the primary drafting of 3.15 times and the secondary drafting of 1.12 times (the co-drafting of 3.53 times) is prepared, and the content of the end amino groups is measured to be 45.2mol/106gr, carboxyl end group content 74.3mol/106gr and a crystallinity of 65.2%, and the following dyeing treatment was performed.
Example 1 acid dye one-bath dyeing of Nylon 56, wool Fabric
Selecting an Elille red A-2BF dye, preparing 4% (o.w.f.) of dye solution, wherein the pH value of the dye solution is 3, the dye-retarding agent RF 4% (o.w.f.), the accelerating agent KD 2.5% (o.w.f.) and the dyeing bath ratio is 1: 5. Adding 2g of dyed fiber at room temperature; heating to 60 ℃ at the heating rate of 1.0 ℃/min, preserving heat for 20min, completing dyeing, cooling the dye liquor to room temperature, taking out the sample, washing with hot water at 60 ℃ for 1 time, washing with water at room temperature for 1 time, and drying in the air.
Example 2 acid dye one-bath dyeing of Nylon 56, wool Fabric
Eleniex yellow A-3G was selected and dyed by the method of example 1.
Comparative example 1 dyeing percentage curve of chinlon 56 and wool with three acid dyes under conventional conditions
Preparing 1g/L acid Elierier red A-2BF dye (or M type maotai red B or Annofex red ARC) standard dye solution, preparing 10 groups of dye baths with 2mL of standard dye solution, wherein the fiber is 0.2g, the bath ratio is 1:500, adjusting the pH value of the dye solution to 4.67, simultaneously putting the dye baths into a dyeing machine with the dyeing temperature set to 60 ℃, respectively dyeing for 5min, 10min, 15min, 20min, 30min, 45min, 60min, 75min, 90min and 120min, taking out samples, washing the samples with normal temperature water, and testing the dye rate curve of the dye baths after drying in the air and stripping. The dye-uptake rate curves of chinlon 56 and wool are shown in FIGS. 2-4.
Under the same conventional dyeing conditions, the two fibers have different dye-uptake rates, and the dye-uptake rate of the chinlon 56 is obviously higher than that of wool, so that the two fiber blended fabrics are easy to be uneven when dyed by the conventional dyeing method.
Comparative example 2, chinlon 66 and wool fabric dyed in one bath by adopting the process of example 1
The results of the nylon 56 and wool one-bath dyeing measurements are shown in Table 3, the photograph of the dyed material is shown in FIG. 5, and the color fastness test is shown in Table 4.
TABLE 3 measurement results of PA 56/wool one-bath dyeing
The relative depth (wool/brocade) is the ratio of the K/S value of the wool to the K/S value of PA56, and under the condition that the fabric texture, the weaving texture and the yarn count fineness of PA56 and the wool are the same, the closer the relative depth is to 1, the smaller the difference of the K/S values of the wool and the wool is, and the smaller the color difference delta E is. As is evident from comparative example 1, the dyeing difference between chinlon 66 and wool is obvious under the same conditions.
Example 3 acid dye Dip-dyeing of Chinlon 56/wool (55/45) blend Fabric
Selecting an Elille red A-2BF dye, preparing 4% (o.w.f.) dye solution, wherein the pH value of the dye solution is 3, and adding a dye-retarding agent RF 4% (o.w.f.), an accelerating agent KD 2.5% (o.w.f.) and a dyeing bath ratio of 1: 5. Adding 2g of dyed fabric at room temperature; heating to 60 ℃ at the heating rate of 1.0 ℃/min, preserving heat for 20min, completing dyeing, cooling the dye liquor to room temperature, taking out the sample, washing with hot water at 60 ℃ for 1 time, washing with water at room temperature for 1 time, and drying in the air.
Example 4 neutral dye Dip-dyeing of Chinlon 56/wool (55/45) blend Fabric
Selecting M-type dye mauve B to prepare 2% (o.w.f.) dye solution, wherein the pH value of the dye solution is 4.0, and adding a retarding agent NLJ-2870.5% (o.w.f.), an accelerating agent TGR-M2% (o.w.f.) and a dyeing bath ratio of 1: 3. Adding 2g of dyed fabric at normal temperature; then heating to 60 ℃ at the heating rate of 1.5 ℃/min, preserving heat for 20min, completing dyeing, cooling the dye liquor to room temperature, taking out the sample, washing with hot water at 50 ℃ for 1 time, washing with water at room temperature for 1 time, and airing, wherein the dyeing results are shown in the following table 4.
Example 5, the method of example 4 was used to dye a nylon 56/wool (55/45) blend fabric using 200% neutral black AW with S-type metal complex dye, with the remaining conditions unchanged, and the dyeing results are shown in table 4 below.
Example 6 reactive dye Dip dyeing of Chinlon 56 and wool fiber blended Fabric
Selecting a dye Annoutin bright yellow 4GL, preparing 0.5% (o.w.f.) dye solution, wherein the pH value of the dye solution is 4.5, the dyeing bath ratio is 1:4, adding 5g/L of anhydrous sodium sulphate, 5g/L of a leveling agent JV-11% (o.w.f.), and 2% (o.w.f.) of an accelerating agent WDP. Adding 2g of a fabric to be dyed under the condition of normal temperature, heating a dyeing solution to 55 ℃ at the speed of 1 ℃/min, dip-dyeing for 15min, then continuously heating to 70 ℃ at the speed of 1.5 ℃/min, adding 20g/L of sodium carbonate, fixing color and preserving heat for 20min, finishing dyeing, cooling the dyeing solution to room temperature, taking out a sample, washing the sample with hot water at the temperature of 40 ℃ for 1 time, washing the sample with room temperature water for 1 time, soaping (2g/L of the soap solution, 60 ℃, 10min, the bath ratio of 1:10), washing with room temperature water for 1 time, and drying.
TABLE 4 color fastness test results of chinlon/wool dyed with acid dye, neutral dye and reactive dye
As can be seen from the dyeing effects of the examples 1-6, the dyeing of the chinlon 56/wool blended fabric by the method can be realized at a lower temperature in a shorter time, the same color effect of the chinlon 56 and the wool can be realized, the apparent depth is better, the color spectrum is complete, the dye uptake is high, and the color fastness is good.
Claims (10)
1. A low-temperature one-bath one-step dip dyeing method for a chinlon 56 fiber and protein fiber blended fabric comprises the following steps: carrying out dip dyeing on a dyed object by adopting an acid dye, a neutral dye or a reactive dye;
wherein the dyed object is a blended fabric or a non-woven fabric formed by chinlon 56 fiber and protein fiber;
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 20-80 mol/106gr；
The content of terminal carboxyl groups of the chinlon 56 fiber is 50-110 mol/106gr；
The crystallinity of the nylon 56 fiber is 30-70%.
2. The method of claim 1, wherein: the mass percent of the nylon 56 fiber is 10-90%, preferably 45-65%;
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 20-60 mol/106gr, preferably 45 to 55mol/106gr；
The content of terminal carboxyl groups of the chinlon 56 fiber is 60-90 mol/106gr, preferably 65 to 75mol/106gr。
The crystallinity of the nylon 56 fiber is 45-65%, preferably 50-65%;
the protein fiber comprises animal protein fiber and/or fabric protein fiber.
3. The method according to claim 1 or 2, characterized in that: the steps of dyeing with the acid dye or the neutral dye are as follows: preparing the acid dye or the neutral dye into a dye solution, regulating the pH value to 2.0-6.8 according to a bath ratio of 1: 2-10, adding a dyeing auxiliary agent, adding the dyed object to dye at room temperature, heating to 30-80 ℃ at a heating rate of (1-5) DEG C/min, keeping the temperature for 1-20 min, cooling to room temperature, and carrying out dyeing post-treatment.
4. The method according to claim 1 or 2, characterized in that: the steps of dyeing with the reactive dye are as follows: preparing the reactive dye into a dye solution, adding 1-20g/L anhydrous sodium sulphate and a dyeing auxiliary agent according to a bath ratio of 1: 2-10, regulating the pH value to 2.0-6.5, adding the dyed object at room temperature, heating to 30-50 ℃, keeping the temperature for 1-25 min, continuously heating to 50-80 ℃ at a speed of (1-5) DEG C/min, adding a color fixing agent for fixing color for 5-25 min, cooling to room temperature, and carrying out dyeing post-treatment.
5. The method of claim 4, wherein: the color fixing agent is a surfactant (cationic type), a quaternary ammonium salt without surface activity, a resin type color fixing agent, a cross-linking color fixing agent and a formaldehyde-free color fixing agent;
the color fixing conditions are as follows: the color fixing agent is 1-5 g/L, and the bath ratio is 1: 2-10.
6. The method according to any one of claims 1-5, wherein: the acid dye is any one of azo acid dye, anthraquinone acid dye, triarylmethane acid dye, xanthene acid dye and nitro acid dye.
7. The method according to any one of claims 1-5, wherein: the neutral dye is a 1:2 type metal complex dye in an acidic mordant-containing dye.
8. The method according to any one of claims 1-5, wherein: the reactive dye is a chloro-s-triazine reactive group reactive dye, a vinyl sulfone reactive group reactive dye, a multi-reactive group reactive dye, a bromo-acrylamide reactive group reactive dye, an epoxy reactive dye or an azide reactive dye.
9. The method according to any one of claims 3-8, wherein: the dyeing auxiliary agent is a pH regulator, a chinlon dyeing rate regulator and a protein fiber dyeing rate regulator.
10. The method of claim 9, wherein: the pH regulator is acid, alkali, acid oxide, alkali oxide, weak acid strong alkali salt or strong acid weak alkali salt;
the polyamide dyeing rate regulator is peregal O, a leveling agent JV-905, a leveling agent JV-1, a leveling agent SET, a leveling agent HJ-219, a leveling agent NL, a slow-dyeing agent NLJ, a slow-dyeing agent NLJ-287, a dye-blocking agent RF and a dye-blocking agent FK-450A;
the protein fiber dyeing rate regulator is an accelerating agent TGR-M, an accelerating agent WDS, an accelerating agent KD, an accelerating agent WDP, an accelerating agent W-201 or an accelerating agent DW.
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