CN115262254A - Efficient tie-dyeing method - Google Patents
Efficient tie-dyeing method Download PDFInfo
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- CN115262254A CN115262254A CN202211033007.4A CN202211033007A CN115262254A CN 115262254 A CN115262254 A CN 115262254A CN 202211033007 A CN202211033007 A CN 202211033007A CN 115262254 A CN115262254 A CN 115262254A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/12—Reserving parts of the material before dyeing or printing ; Locally decreasing dye affinity by chemical means
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Abstract
The invention discloses an efficient tie-dyeing method, which comprises the following steps: twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the stranded wire is water-soluble polyvinyl alcohol fiber; dyeing, namely immersing the fastened fabric into a dye solution to attach the dye to the fabric, washing away the floating dye on the fabric by using a rinsing solution, and exposing the wrung fabric to the air to oxidize the dye in the fabric; cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the stranded wires on the fabric; and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric. The twisted wire made of the water-soluble polyvinyl alcohol fiber replaces the common twisted wire, can be directly dissolved in the cleaning procedure, solves the problem that the fabric is easy to damage when being removed, improves the quality of the tie-dyed product, simplifies the tie-dyeing process flow, and is convenient for tie-dyeing which is the inheritance of the non-material cultural heritage.
Description
Technical Field
The invention belongs to the technical field of printing and dyeing, and particularly relates to an efficient tie-dyeing method.
Background
The tie-dyeing is called 'han valin', which is an ancient textile dyeing technology in China, and the part of the textile to be tied cannot be dyed by dye by partially tying the textile during dyeing. As an important inheritance of classical culture in China, tie-dyeing is also listed in non-material cultural heritage in China for protection.
The tie-dyeing process mainly comprises two parts of tying and dyeing, wherein the fabric is tied, sewed, bound, decorated, clamped and the like in various combined modes through tools such as yarns, threads, ropes and the like, and then the tied fabric is placed into a dye vat for dyeing. Because of the variety of tie-dyeing techniques, the patterns presented after dyeing are different, and the artistic effect is difficult to achieve by mechanical printing and dyeing, the tie-dyeing is usually made by manual operation.
The tie-dyeing process mainly comprises the steps of pattern painting, twisting, soaking, cloth dyeing, cooking, sun drying, stitch removing, cloth grinding and the like, in order to meet the complexity of patterns, a sewing method is mostly adopted for twisting and dyeing the fabric in the tie-dyeing process, the sewn twisted threads need to be closely inserted on the fabric to ensure that the printed and dyed patterns are clear, but when the threads are removed, the twisted threads and the fabric are too close, so that great troubles exist. When the stitches are removed, scissors or other stitches removing tools with tool tips are usually adopted, a gap capable of accommodating the tool tips is found between the twisted stitches and the fabric, the tool tips penetrate into the gap, and the twisted stitches are cut off through the cutting edges; or the twisting and binding line is directly cut on the surface of the fabric through the blade of the knife, the hidden trouble of cutting the fabric also exists in the method for removing the thread, and the color of the fabric is greatly reduced. Therefore, the fabric produced by the traditional tie-dyeing process has high breakage rate, and a skilled technician is required to prepare the fabric with good color.
Disclosure of Invention
The invention aims to solve the technical problems and provide an efficient tie-dyeing method, which solves the problems that in the prior art, stitches are difficult to remove and the stitches are easy to lacerate fabrics.
In order to solve the problems, the invention is realized according to the following technical scheme:
the invention provides an efficient tie-dyeing method, which comprises the following steps:
twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the stranded wire is water-soluble polyvinyl alcohol fiber;
dyeing, namely soaking the fastened fabric into dye liquor to attach the dye to the fabric, washing away the floating dye on the fabric by using rinsing liquor, and exposing the wrung fabric to the air to oxidize the dye in the fabric;
cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the stranded wires on the fabric;
and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric.
In another preferred embodiment, the dissolution temperature of the water soluble linear polyethylene fiber is 60-80 ℃.
In another preferred embodiment, the fabric is modified by a cationic modifier;
the cation modifier comprises a cation modifier WLS-20, a cation modifier FK-316, a cation modifier CH and a cation modifier LD-8202.
In another preferred example, the cleaning step specifically includes:
and (3) putting the dyed fabric into a soluble sodium salt solution for washing, and gradually heating the soluble sodium salt solution to enable the temperature of the soluble sodium salt solution to be higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber.
In another preferred embodiment, the concentration of sodium ions in the soluble sodium salt solution is 0.2 to 0.25mol/L.
In another preferred example, the soluble sodium salt is one of sodium chloride, sodium sulfate, sodium carbonate and sodium bicarbonate.
In another preferred embodiment, the rinsing liquid includes:
an acidic rinse solution comprising a citric acid solution and a glacial acetic acid solution;
the alkaline rinsing liquid is soap liquid.
In another preferred embodiment, the dye is indigo.
In another preferred example, the dyeing step is repeated 10 to 20 times, wherein:
immersing the fabric into the dye solution for 3-5 min to make the dye adhere to the fabric;
and exposing the wrung fabric to the air for 3-5 min to oxidize the dye in the fabric.
In another preferred embodiment, the drying temperature is 55-65 ℃.
Compared with the prior art, the invention has the beneficial effects that:
in the embodiment of the application, the twisted wire made of the water-soluble polyvinyl alcohol fiber replaces the twisted wire made of common tie-dyed cotton, hemp and other insoluble materials, in the cleaning process, because the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber, the water-soluble polyvinyl alcohol fiber can be directly dissolved away in the cleaning process, the problems that the stitches are difficult to remove and the fabrics are easy to break during the stitch removing process are solved, the quality of tie-dyed products is improved, the tie-dyeing process flow is simplified, the production efficiency is improved, the tie-dyed non-material cultural heritage can be conveniently applied in modern life, the modern quality and cost requirements of fabrics of modern home furnishings and the like can be met, and the non-heritage cultural bottom is not lost.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Although the present embodiment is discussed with indigo as the dye, it should be understood that the dye of the present invention should not be limited to indigo dye, and other normal temperature dyes having the same characteristics as indigo and capable of coloring at a temperature lower than 60 ℃ are within the scope of the present application, such as white gourd, pomegranate rind, gardenia, walnut shell, saffron, etc.
Modern tie-dyeing processes typically include: drawing, tracing, making plate, printing, tying, desizing, soaking, dyeing, rinsing, oxidizing, removing stitches, rinsing, airing, flattening and the like, and the like. The tie-dyeing is generally performed by using a new gray fabric, the gray fabric refers to a fabric which is not subjected to printing and dyeing, slurry remained in the process of weaving the gray fabric is remained on the surface of the fabric, the slurry on the surface of the gray fabric needs to be removed in the tie-dyeing process so as to improve the tie-dyeing effect, and hot water or alkaline solution can be used for removing the slurry on the gray fabric.
The drawing, tracing, plate making and printing process can obtain the pattern to be printed on the surface of the grey cloth as the reference standard for sewing needle. Generally, a pattern to be printed is drawn on white paper, the pattern is drawn on a plastic film cloth, the plastic film cloth is punched and cut according to the pattern to obtain a film template, the film template is laid on a grey cloth, and a water-soluble pigment is brushed on the template to obtain the pattern with the same contour on the grey cloth.
The knot tying is a main process different from other printing and dyeing processes, and the tied part cannot be colored by dye by partially tying the fabric during dyeing. The uniqueness of the tie-dyeing pattern is created by various tying methods such as tying, sewing, binding, decorating, clipping and the like, wherein a sewing line is a main tying means for making complex patterns by tie-dyeing and is also the most difficult tying method, the sewing needs to be carried out by sewing one line by one line according to the outline line of the pattern on the grey cloth, after the sewing of each pattern is finished, a strand wire is tensioned to tie the grey cloth, the strand wire is tied, and the tied part is difficult to be attached by dye during dyeing to retain the original color of the grey cloth.
In the stitch removing process, the binding between the grey cloth and the stranded wire is too tight, so that the stranded wire is difficult to remove smoothly by a stitch removing tool, or the grey cloth is easy to be scratched by the stitch removing tool during stitch removing. Generally, the skilled technician can complete the stitch breaking process to obtain a fabric with better color, which also brings great difficulty to the transmission of the tie-dyeing process.
The invention relates to a high-efficiency tie-dyeing method, which comprises the following steps:
step S1: twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the stranded wire is water-soluble polyvinyl alcohol fiber;
step S2: dyeing, namely immersing the fastened fabric into a dye solution to attach the dye to the fabric, washing away the floating dye on the fabric by using a rinsing solution, and exposing the wrung fabric to the air to oxidize the dye in the fabric;
and step S3: cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the stranded wires on the fabric;
and step S4: and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric.
In the embodiment, the twisted wire made of the water-soluble polyvinyl alcohol fiber replaces the twisted wire made of the common tie-dyed cotton, hemp and other insoluble materials, and in the cleaning procedure, because the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber, the twisted wire can be directly dissolved in the cleaning procedure, so that the problems of difficult stitch removal and easy damage of fabric stitch removal in the stitch removal process are solved, the quality of tie-dyed products is improved, the tie-dyeing process flow is simplified, and the tie-dyeing process is convenient for the inheritance of the non-material cultural heritage.
Step S1: twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the stranded wire is water-soluble polyvinyl alcohol fiber.
The water-soluble polyvinyl alcohol fiber (water-soluble PVA fiber) is a water-soluble synthetic fiber, has physical properties similar to those of cotton, hemp and other materials, has certain strength and ductility, can be tightly attached to a fabric during twisting, and cannot be broken due to tension generated by pressing grey cloth.
Step S2: dyeing, immersing the fastened fabric in a dye solution to attach the dye to the fabric, washing off the floating dye on the fabric with the rinse solution, and exposing the wrung-out fabric to air to oxidize the dye in the fabric.
The dyeing process can be roughly divided into three processes: dip dyeing-rinsing-oxidizing. In the embodiment, the dye adopted in the dip dyeing is indigo dye, the indigo is reductive dye with the widest application in the printing and dyeing industry, and the color fastness of the fabric dyed by the indigo is also good. Many indigo-containing materials are known, such as isatis root, polygonum tinctorium, isatis tinctoria, indigofera tinctoria, and Strobilanthes, and in these plants, indigo exists in the form of its indigoside, which is soluble in water, and two molecules of the indigoside undergo a condensation reaction in an alkaline environment to produce water-insoluble indigoside.
In the dyeing process, in order to dissolve the indigo, the dye solution also contains an alkaline agent and a reducing agent, wherein the alkaline agent is used for providing an alkaline environment, the alkaline agent is usually sodium hydroxide, and the reducing agent can be sodium hydrosulfite or glucose. Indigo usually exists in four forms in a dye solution, wherein the first form is indigo in an oxidation state, and the indigo is insoluble in water; the second form is leuco acid, when the reduction potential of the indigo reaches-760 mV in a weakly alkaline environment, the indigo is reduced into leuco acid which is slightly soluble in water, the higher the column ratio of the leuco acid in a dye solution is, the poorer the permeability is when the fabric is dyed, the heavier the formed floating color is, and the poorer the color fastness is; the third form is leuco body of monophenol sodium ion type, and when the reduction potential of the indigo is reached to-760 mV in sufficient aqueous solution of reducing agent and alkaline agent, the indigo is reduced into leuco body which is soluble in water and is also called indigo white, and the leuco body is the best form of the indigo for dyeing; the fourth form is bisphenol sodium salt, when the reduction potential of the indigo is far beyond-760 mV in an excessive aqueous solution of a reducing agent and an alkaline agent, the indigo is reduced into bisphenol sodium salt which is easily dissolved in water, the bisphenol sodium salt is easily dissolved in the water and adsorbed on the fibers of the fabric during dyeing, but the bisphenol sodium salt is also easily dissolved in the aqueous solution again, namely the indigo in the form of the bisphenol sodium salt is not suitable for dyeing. Therefore, the concentration of the alkali agent and the reducing agent needs to be reasonably controlled, and the proportion of the indigo existing in a leuco form in the dye needs to be increased.
In a preferred embodiment, the dyed fabric is modified with a cationic modifier selected from the group consisting of cationic modifier WLS-20, cationic modifier FK-316, cationic modifier CH and cationic modifier LD-8202. Because the fabric is mostly made of cotton fibers, the surface layer of the cotton fibers is cotton cellulose anions, leuco indigo suitable for dyeing is also anions, and the cotton cellulose anions and the indigo anions repel each other in the same polarity, the dyeing rate is low, and the color fastness is poor. The fabric is modified by the cationic modifier, so that the surface of the fabric obtains cations to adsorb leucoindigo anions, the acting force between the fabric and leucoindigo is enhanced, and the color fastness of the indigo is improved.
In the rinsing process, the rinsing liquid can be clear water. In a preferred embodiment, the rinsing liquid comprises an acidic rinsing liquid and an alkaline rinsing liquid, wherein the acidic rinsing liquid adopts a weakly acidic citric acid solution and a glacial acetic acid solution, and the citric acid solution and the glacial acetic acid solution can wash off indigo with poor color fastness on the surface of the fabric; the alkaline rinsing liquid adopts alkalescent soapy water. In an alkaline environment lacking a reducing agent, the alkaline environment of the fabric can be maintained through the alkaline rinsing liquid, the speed of oxidizing the indigo into the indigo is accelerated, but the alkaline environment is too strong, fibers of the fabric are easily damaged, and meanwhile, in order to meet the requirement that the final pH value of the B-type standard in the national basic safety technical specification GB 18401-2010 of textile products is 4-7.5, the pH value of the fabric is regulated by adding the acidic rinsing liquid, so that the fibers of the fabric are not easily damaged, and the fabric also meets the national standard.
In a preferred embodiment, the dyeing process is repeated for 10-20 times, and the fabric is immersed in the dye solution for 3-5 min, so that the dye is attached to the fabric; and exposing the wrung fabric to the air for 3-5 min to oxidize the dye in the fabric. The indigo dye has small affinity with fabric fibers, the dye-uptake rate is low, the dye-uptake rate is about 10% every time, high color quantity can be obtained only by multiple dip dyeing and oxidation, and the indigo is oxidized layer by layer, so that the fastness of the indigo on the fabric can be improved, and the depth of the dyeing color of the fabric can be adjusted by adjusting the dyeing times.
And step S3: and (3) cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the twisted wire on the fabric.
In step S3, the fabric may be cleaned with clean water, and the temperature of the clean water is gradually increased from room temperature until the water-soluble polyvinyl alcohol fibers are completely dissolved. The dissolution process of the water-soluble polyvinyl alcohol fiber can be divided into two stages: swelling and dissolving, wherein the water-soluble polyvinyl alcohol fiber is hardly dissolved before the water temperature reaches the dissolving temperature of the water-soluble polyvinyl alcohol fiber, the stage is called a swelling stage, the kinetic energy of absorbed water molecules is continuously increased along with the continuous rise of the temperature, the permeability of the water molecules to the inside of the water-soluble polyvinyl alcohol fiber is gradually enhanced, meanwhile, the water-soluble polyvinyl alcohol fiber also absorbs heat to expand, the volume is continuously increased, an undyed area on the fabric can be completely covered, the indigo is prevented from being adhered to the undyed area, and the definition of the contour line of patterns on the fabric can be ensured. When the water temperature exceeds the dissolving temperature, the water-soluble polyvinyl alcohol fiber begins to dissolve, and after the water temperature exceeds the glass transition temperature, the water-soluble polyvinyl alcohol fiber further swells, and because the water-soluble polyvinyl alcohol fiber has certain crystallinity, enough heat needs to be absorbed when the water-soluble polyvinyl alcohol fiber is completely dissolved, so that molecules in a crystal region are free from the constraint of crystal lattices and quickly diffused in water until the water-soluble polyvinyl alcohol fiber is completely dissolved.
The dissolution temperature of the water-soluble linear polyethylene fiber adopted in the embodiment is 60-80 ℃. At room temperature, the water temperature in the dye vat is about 20-25 ℃, the higher the temperature is, the higher the water temperature required for cleaning is, and when the water temperature exceeds 80 ℃, the fabric can shrink greatly, the adhesive force between the indigo and the fabric is reduced, and the color fastness of the indigo on the fabric is further reduced.
In practice, the applicant finds that after the polyvinyl alcohol fibers are dissolved, the polyvinyl alcohol fibers are not completely dissolved in clear water, the partially flocculent polyvinyl alcohol fibers still exist and float on the water surface, and are easily attached to the surface of the fabric in the cleaning process, so that the attached area is prevented from being further cleaned, and after the fabric is dried, the area covered by the polyvinyl alcohol fibers is not cleaned by indigo, so that a large number of color spots with uneven colors exist on the fabric, and the tie-dyeing effect of the fabric is influenced.
In a preferred embodiment, the cleaning step specifically includes:
step S301: and (3) putting the dyed fabric into a soluble sodium salt solution for washing, and gradually heating the soluble sodium salt solution to enable the temperature of the soluble sodium salt solution to be higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber.
The sodium ions are metal cations with strong hydration capability, and the strong electric field generated by the sodium ions adsorbs the hydroxyl groups of water molecules combined with the polyvinyl alcohol in the solution, so that the dissolved polyvinyl alcohol is quickly gelled, and further gels with larger particles are formed and are precipitated at the bottom of the cleaning solution, and the adhesion of the gels to the fabrics can be prevented. Meanwhile, the fabric is obtained after the fabric is modified by the cationic modifier, and a large number of modifier cations exist on the surface layer and repel sodium ions in the same polarity, so that the sodium ions are prevented from approaching the fabric, and further flocculent polyvinyl alcohol can be prevented from being attached to the surface of the fabric.
Specifically, the soluble sodium salt is one of sodium chloride, sodium sulfate, sodium carbonate and sodium bicarbonate, and the concentration of sodium ions is 0.2 to 0.25mol/L, in this embodiment, a solution made of sodium carbonate and sodium bicarbonate is preferably used as a cleaning solution, under the concentration, an alkaline environment provided by the sodium ions can promote the soluble polyvinyl alcohol fibers to be rapidly dissolved, and on the other hand, the polymerization of the sodium ions on the dissolved polyvinyl alcohol fibers promotes the polyvinyl alcohol fibers to be rapidly gelled and precipitated.
In a preferred embodiment, the washed fabric is rinsed again in clean water from the soluble sodium salt solution, and the residual salt solution on the fabric is washed.
And step S4: and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric.
The cleaned fabric can be naturally dried in a dark environment, so that direct sunlight is avoided, and the color fastness of the indigo is reduced. In a preferred embodiment, the fabric is placed into a dryer for drying, the drying temperature is 55-65 ℃, at which the fabric can be rapidly dehydrated, the cotton fiber on the fabric is not easy to denature and shrink at high temperature, and the color fastness of the indigo is well maintained.
(1) Example experiments:
example 1
In this example, the fabric was made of cotton square cloth of size 10cm × 10cm to remove the size; the center of the fabric is provided with a circular pattern with a large diameter of 3cm and a small diameter of 2 cm. The tie-dyeing method comprises the following steps:
step S1: twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the stranded wire is water-soluble polyvinyl alcohol fiber. Adopting water-soluble polyvinyl alcohol fiber with the dissolving temperature of 60 ℃; the fabric is modified by a cationic modifier WLS-20;
step S2: dyeing, immersing the fastened fabric in a dye solution to attach the dye to the fabric, washing off the floating dye on the fabric with the rinse solution, and exposing the wrung-out fabric to air to oxidize the dye in the fabric. The dye adopts indigo, the dyeing step is repeated for 10 times, the soaking time in dye liquor is 5min, and the oxidation time in air is 5min; the rinsing liquid adopts 2% soap liquid and 1% citric acid solution, the soap liquid is firstly used for rinsing and color fixing, and then the citric acid solution is used for adjusting the pH value.
And step S3: and (3) cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the stranded wires on the fabric. The cleaning solution is a sodium carbonate solution with the concentration of 0.1mol/L, and the sodium ion concentration of the cleaning solution is 0.2mol/L. The temperature of the solution was raised from 25 ℃ to 70 ℃ and maintained at 70 ℃ until the fabric was completely unfolded.
And step S4: and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric. Drying by a dryer at 60 ℃.
Example 2
In this example, the fabric was de-sized cloth made of square cotton with a size of 10cm × 10 cm; the pattern on the fabric is a circular ring with a large diameter of 3cm and a small diameter of 2 cm. The tie-dyeing method comprises the following steps:
step S1: twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the stranded wire is water-soluble polyvinyl alcohol fiber. Adopting water-soluble polyvinyl alcohol fiber with the dissolving temperature of 80 ℃; the fabric is modified by a cationic modifier WLS-20;
step S2: dyeing, immersing the fastened fabric in a dye liquor to attach the dye to the fabric, washing off the floating dye from the fabric with the rinse liquor, and exposing the wrung-out fabric to air to oxidize the dye in the fabric. The dye adopts indigo, the dyeing step is repeated for 18 times, the immersion time in dye liquor is 3min, and the oxidation time in air is 3min; the rinsing liquid adopts 2% soap liquid and 1% citric acid solution, the soap liquid is firstly used for rinsing and color fixing, and then the citric acid solution is used for adjusting the pH value.
And step S3: and (3) cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the stranded wires on the fabric. The cleaning solution is a sodium carbonate solution with the concentration of 0.1mol/L, and the sodium ion concentration of the cleaning solution is 0.2mol/L. The temperature of the solution was raised from 25 ℃ to 85 ℃ and maintained at 85 ℃ until the fabric was completely unfolded.
And step S4: and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric. Drying by a dryer at 60 ℃.
Example 3
In this example, the fabric was made of cotton square cloth of size 10cm × 10cm to remove the size; the pattern on the fabric is a circular ring with a large diameter of 3cm and a small diameter of 2 cm. The tie-dyeing method comprises the following steps:
step S1: twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the twisted wire is water-soluble polyvinyl alcohol fiber. Adopting water-soluble polyvinyl alcohol fiber with the dissolving temperature of 60 ℃; the fabric is modified by a cationic modifier WLS-20;
step S2: dyeing, immersing the fastened fabric in a dye solution to attach the dye to the fabric, washing off the floating dye on the fabric with the rinse solution, and exposing the wrung-out fabric to air to oxidize the dye in the fabric. The dye adopts indigo, the dyeing step is repeated for 10 times, the immersion time in dye liquor is 5min, and the oxidation time in air is 5min; the rinsing liquid adopts 2% soap liquid and 1% citric acid solution, the soap liquid is firstly used for rinsing and color fixing, and then the citric acid solution is used for adjusting the pH value.
And step S3: and (3) cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the twisted wire on the fabric. The cleaning solution is a sodium chloride solution with the concentration of 0.2mol/L, and the concentration of sodium ions is 0.2mol/L. The temperature of the solution was raised from 25 ℃ to 70 ℃ and maintained at 70 ℃ until the fabric was completely developed.
And step S4: and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric. Drying by a dryer at 60 ℃.
Comparative example 1
The difference from the embodiment 1 is that:
the stranded wire adopted in the step 1 is a cotton wire;
and (3) removing the stranded wire by using tools such as scissors before cleaning in the step 3.
Comparative example 2
The difference from the embodiment 1 is that:
the fabric in step 1 is not modified by a cationic modifier WLS-20.
Comparative example 3
The difference from the embodiment 1 is that:
in the step 1, the dissolving temperature of the water-soluble polyvinyl alcohol fiber is 90 ℃;
in step 3, the temperature of the solution is raised from 25 ℃ to 95 ℃, and the temperature is maintained at 95 ℃ until the fabric is completely unfolded.
Comparative example 4
The difference from the example 1 is that:
and step 3, adopting clean water as cleaning fluid.
(2) Sensory testing:
item:
visually observing the color distribution of the tie-dyed fabric sample, the outline of the pattern and the definition of the contour line;
and identifying the color of the fabric through comparison of an international color chart.
(3) And (3) testing color fastness:
after spreading and paving the tie-dyed fabric sample, measuring the ring width (the number of estimated reading bits) of the ring outline by using a millimeter graduated scale, drawing a 'meter' -shaped line by using a marker pen with 45 degrees as an included angle by taking the center of a ring pattern as the center, taking the intersection line of the line and the pattern as a sample measuring point, and taking the average width of 8 sample measuring points as the ring width.
The model of the experimental box is HZ-2011 xenon gas aging experimental box (Dongguan commercially available mechanical instrument science and technology Co., ltd.), and the radiance is 350nm (60W/m) 2 ) And selecting the temperature to be 42 ℃ and the humidity to be 38%, placing the tie-dyed fabric sample in a xenon aging experimental box to be exposed for 10 hours, then cleaning the tie-dyed fabric sample in clear water at the temperature of 25 ℃, and drying the tie-dyed fabric sample in a baking oven at the temperature of 60 ℃. And (5) after drying, taking the same sample measuring point for measurement and calculating the ring width.
And (4) conclusion: it is evident from the above comparison that the fabrics prepared in examples 1 to 3 have uniform color distribution, clear pattern outlines, and superior coloring rate and color fastness to the prior art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention will still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A high-efficiency tie-dyeing method is characterized by comprising the following steps:
twisting, namely sewing a twisting wire according to the outline of the pattern on the fabric, and tightening the twisting wire to tighten the fabric; the twisted wire is water-soluble polyvinyl alcohol fiber;
dyeing, namely immersing the fastened fabric into a dye solution to attach the dye to the fabric, washing away the floating dye on the fabric by using a rinsing solution, and exposing the wrung fabric to the air to oxidize the dye in the fabric;
cleaning, namely putting the dyed fabric into a cleaning solution for cleaning, wherein the highest temperature of the cleaning solution is higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber so as to dissolve the stranded wires on the fabric;
and (5) drying, namely drying the washed fabric to obtain the tie-dyed fabric.
2. A high efficiency tie-dyeing process as claimed in claim 1, wherein:
the dissolution temperature of the water soluble linear polyethylene fiber is 60-80 ℃.
3. A high-efficiency tie-dyeing method according to claim 1, characterized in that:
the fabric is modified by a cationic modifier;
the cation modifier comprises a cation modifier WLS-20, a cation modifier FK-316, a cation modifier CH and a cation modifier LD-8202.
4. A high-efficiency tie-dyeing method according to claim 3, characterized in that said cleaning step comprises in particular:
and (3) putting the dyed fabric into a soluble sodium salt solution for washing, and gradually heating the soluble sodium salt solution to enable the temperature of the soluble sodium salt solution to be higher than the glass transition temperature of the water-soluble polyvinyl alcohol fiber.
5. A high efficiency tie-dyeing process as claimed in claim 4, wherein:
the concentration of sodium ions in the soluble sodium salt solution is 0.2-0.25 mol/L.
6. A high efficiency tie-dyeing process as claimed in claim 4, wherein:
the soluble sodium salt is one of sodium chloride, sodium sulfate, sodium carbonate and sodium bicarbonate.
7. A high efficiency tie-dyeing process as claimed in claim 1, wherein said rinse liquor comprises:
an acidic rinse solution comprising a citric acid solution and a glacial acetic acid solution;
the alkaline rinsing liquid is soap liquid.
8. A high efficiency tie-dyeing process as claimed in claim 1, wherein:
the dye adopts indigo.
9. A high-efficiency tie-dyeing method according to claim 8, characterized in that the dyeing step is repeated 10-20 times, wherein:
immersing the fabric into the dye solution for 3-5 min to make the dye adhere to the fabric;
and exposing the wrung fabric to the air for 3-5 min to oxidize the dye in the fabric.
10. A high efficiency tie-dyeing process as claimed in claim 1, wherein:
the drying temperature is 55-65 ℃.
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