Same-color dyeing and finishing process for wool and cellulosic fiber blended or interwoven fabric

Abstract

The invention relates to the technical field of dyeing and finishing, and particularly discloses a same-color dyeing and finishing process for wool and cellulosic fiber blended or interwoven fabric. Comprising the following steps: S1, blending or interweaving cellulosic fibers and wool, and carrying out scouring and bleaching or oil removal treatment to obtain a pretreated fabric; s2, dyeing the pretreated fabric by using a neutral or common active material and a dyeing auxiliary agent, and then performing soaping treatment to obtain a wool shallow cellulose deep fabric; the dyeing auxiliary agent comprises 2-8 wt% of a dye-retarding agent and 20-120 g / L of anhydrous sodium sulphate; and S3, complementarily dyeing a certain amount of acid dye on the wool light cellulose deep fabric to obtain the same-color fabric. According to the same-color dyeing and finishing process, the dye adsorbability of the cellulosic fibers is improved while the color grabbing problem of the wool to the cellulosic fibers is weakened, so that the color of the wool can be more accurately adjusted when the dyed fabric is dyed by the secondary acid dye, and good homochromatism of the wool and the cellulosic fibers is realized.

Description

Technical Field

[0001] The invention relates to the technical field of dyeing and finishing, and particularly discloses a same-color dyeing and finishing process for blended or interwoven fabrics of wool and cellulose fibers. Background Art

[0002] Wool and cellulose fiber blended or interwoven fabrics combine the bulk, warmth, and elastic recovery of wool with the moisture-wicking, breathable, and smooth drape of cellulose fiber. They are widely used in high-end casual wear, knitted sweaters, shirts, and home textiles. However, current processes struggle to meet the high-quality, uniform dyeing and finishing requirements for wool and cellulose fiber blended or interwoven fabrics.

[0003] 1. The disulfide bonds in wool keratin are easily broken under alkaline scouring and bleaching conditions of pH>9.5 and temperature>85℃, causing the fiber to turn yellow and lose strength. Conventional cellulose scouring and bleaching requires a pH of 11-12 to fully swell the cottonseed hulls and remove lignin and pectin. The overlapping process windows of the two result in limited whiteness of high-wool content fabrics, a yellowish base, and a direct weakening of the subsequent same-color effect.

[0004] 2. The traditional process uses acid dyes to dye wool first, and then reactive dyes to dye cellulose. However, since wool absorbs color stronger than cellulose fibers, even if the wool has been dyed with acid dyes, when dyeing cellulose fibers, the dyed wool still has an affinity for reactive dyes and continues to be dyed, making it difficult to dye the wool and cellulose the same color.

[0005] 3. If wool and cellulose are bleached and dyed separately before being interwoven or blended, the weaving properties of the dyed fibers may be weakened. In addition, independent processing of the yarn level will double the number of steps, lengthen the production cycle, and increase the production cost, which is not conducive to the competitiveness of blended or interwoven fabrics in the fast fashion and small-batch multi-color markets. Summary of the Invention

[0006] The present invention aims to overcome the shortcomings of the prior art and provide a dyeing and finishing process for blended or interwoven fabrics of wool and cellulose fibers. The process can achieve reduced dye absorption on wool when dyeing wool and cellulose in the same bath, while maintaining a certain degree of whiteness. Firstly, a certain amount of anionic dye inhibitor is added during the dyeing process. Wool is negatively charged, with -COO- being the dominant species above its isoelectric point. This makes it difficult for reactive dyes to adsorb onto the wool due to electrostatic repulsion. Simultaneously, the dye inhibitor A binds to the remaining positive charge sites on the wool fibers, further strengthening electrostatic repulsion of the dye. A pH stabilizer can be added to stabilize dye absorption. Secondly, a large amount of sodium sulfate is added to enhance dye absorption on the cellulose fibers. This balance of forces improves the color absorption of the cellulose and wool.

[0007] In pursuit of a wider spectrum, the present invention focuses on common reactive dyes with a complete spectrum. First, the dye bath is controlled to be weakly alkaline to avoid violent hydrolysis between the dye and the wool and reduce damage. Second, the addition of dye inhibitor B can cover the active groups on the surface of the wool fiber, such as amino and hydroxyl groups, to reduce the reaction sites. During dyeing, the cellulose fiber normally forms a covalent bond with the dye, while the affinity of the wool for the dye is reduced, thereby creating an effect where the wool is light and the cellulose is dark, providing a basis for subsequent single dyeing of the wool to achieve the same color.

[0008] Specifically, the present invention discloses a same-color dyeing and finishing process for blended or interwoven fabrics of wool and cellulose fibers, which adopts the following technical solutions:

[0009] A same-color dyeing and finishing process for wool and cellulose fiber blended or interwoven fabrics, comprising the following steps:

[0010] S1, taking cellulose fiber and wool blending or interweaving, and performing scouring, bleaching or degreasing treatment to obtain pre-treated fabric;

[0011] S2, dyeing the pre-treated fabric using a neutral or common active material and a dyeing auxiliary, and then soaping to obtain a light cellulose dark fabric; the dyeing auxiliary comprises: a dye inhibitor 2-8wt%, and sodium sulfate 20-120g / L;

[0012] S3. The light-colored wool and dark-colored cellulose fabrics can be re-dyed with certain acid dyes to obtain fabrics of the same color.

[0013] Preferably, when neutral reactive dyes are used in S2, the dyeing auxiliary agents include:

[0014] Dye blocking agent A or dye blocking agent B 2~8wt%,

[0015] Sodium sulfate 80~120g / L,

[0016] pH stabilizer 0~2g / L,

[0017] Leveling agent 0~2g / L;

[0018] The dye inhibitor A is a composite liquid containing a methyl-linked condensate of aryl sulfonic acid and hydroxyaryl sulfone;

[0019] The dye blocking agent B is an aqueous dispersion auxiliary containing 2,4-dichloro-6-(β-sulfate ethylsulfonyl)aniline-s-triazine.

[0020] Preferably, when ordinary reactive dyes are used in S2, the dyeing auxiliary agents include:

[0021] Dye blocking agent B 2~8wt%

[0022] Sodium sulfate 20~60g / L,

[0023] soda 5-30 g / L;

[0024] The dyeing inhibitor B is a water phase dispersion auxiliary containing 2,4-dichloro-6-(β-sulfatoethylsulfonyl) aniline-s-triazine.

[0025] Preferably, the S1 further comprises an oxidative bleaching treatment.

[0026] Preferably, the oxidative bleaching treatment is: adding 4 g / L weak alkaline refining agent and 50 g / L hydrogen peroxide in the treatment bath, treating at 45℃ for 60 min, and then washing.

[0027] Preferably, after the oxidative bleaching treatment, 8 g / L deoxidase and 0.5 g / L acetic acid are added, stirring at room temperature for 10 min, then washing and drying to obtain the pretreated fabric.

[0028] Preferably, the dyeing temperature in the S2 is 50-100℃, and the dyeing time is 30-90 min.

[0029] Preferably, the dyeing temperature in the S3 is 90℃, and the dyeing time is 30 min.

[0030] Preferably, the cellulose fiber includes one or more of cotton, Derailed, Lyocell, Modal, viscose, etc.

[0031] Compared with the prior art, the present application at least includes the following beneficial effects:

[0032] The same color dyeing process of the wool and cellulose fiber blended or interwoven fabric of the present application, by using the dyeing inhibitor and a certain concentration of meta alum, can achieve the effect of "lighter wool and darker cellulose fiber" after the initial active dyeing, weaken the color grabbing problem of wool to cellulose fiber, improve the adsorption of cellulose fiber to dye, so that the color of wool can be more accurately adjusted during the secondary acid dyeing, and thus good same color of wool and cellulose fiber is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The double-sided comparison diagram of the dyed fabric of Example 2 (the upper two pieces of fabric) and the dyed fabric of Comparative Example 4 (the lower two pieces of fabric);

[0034] Figure 2 The front and back double-sided diagram of the same color fabric of Example 2;

[0035] Figure 3 The comparison diagram of the experimental group and the control group of the Lyocell fabric piece of Comparative Example 7;

[0036] Figure 4 The comparison diagram of the experimental group and the control group of the wool fabric piece of Comparative Example 7

[0037] Brief Description of the Drawings Figure 1 The label L is a cellulose fiber surface, and the label W is a wool surface. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0039] Example 1

[0040] A same-color dyeing and finishing process for a wool and cellulose fiber blended or interwoven fabric includes the following steps:

[0041] S1, take cotton and shrink-resistant wool interwoven double-sided fabric (one side cotton and one side wool), and perform oxidation pretreatment, add 4 g / L weak alkaline refining agent and 50 g / L hydrogen peroxide in the treatment bath, treat at 45°C for 60 min, then wash, add 8 g / L oxygen scavenging enzyme and 0.5 g / L acetic acid, stir at room temperature for 10 min, then wash and dry to obtain pretreated fabric 1;

[0042] S2, prepare a dye bath by mixing 3 wt% neutral reactive red, 4 wt% dyeing inhibitor A, 120 g / L sodium sulfate, and 1 g / L pH stabilizer, add pretreated fabric 1, heat at 95°C for 60 min, then wash, add 1 g / L soaping agent, soaping at 95°C for 10 min, then wash and dry to obtain dyed fabric 1; wherein the dyeing inhibitor A is a complex liquid containing aryl sulfonic acid and hydroxy aryl sulfone methyl linkage condensate, and in this embodiment, it is MESITOL HWS liquid 01 (MESITOL BPE can also be used);

[0043] S3, prepare a dye bath by mixing 0.024 wt% acid red, 0.006 wt% acid yellow, 0.5 g / L leveling agent, and 0.5 g / L acid releasing agent, add dyed fabric 1, heat at 90°C for 30 min, then wash, add 2 g / L soaping agent, wash at 50°C for 20 min, then wash and dry to obtain same-color fabric 1.

[0044] Example 2

[0045] A same-color dyeing and finishing process for a wool and cellulose fiber blended or interwoven fabric includes the following steps:

[0046] S1, take Lyocell and shrink-resistant wool interwoven double-sided fabric (one side Lyocell and one side wool), and perform oil removal treatment, add 1 g / L oil removal agent in the treatment bath, treat at 80°C for 20 min, then wash and dry to obtain pretreated fabric 2;

[0047] S2, active yellow 0.33wt%, active red 0.23wt%, active blue 2.17wt%, dyeing inhibitor B 3wt%, anhydrous sodium sulfate 60g / L, soda 20g / L are prepared into dye bath, add pretreated fabric 2, 60℃ for 60min, then wash, soaping agent 1g / L 95℃ soaping 10min, wash and dry to get dyed fabric 2; wherein, dyeing inhibitor B is water phase dispersion containing 45-55wt% of 2,4-dichloro-6-(β-sulfate ethyl sulfonamide) aniline-s-triazine auxiliary;

[0048] S3, acid yellow 0.043wt%, acid deep blue 0.67wt%, acid black 1.3wt%, leveling agent 0.5g / L, acid releasing agent 0.5g / L are prepared into dye bath, add dyed fabric 2, 90℃ for 30min, then wash, soaping agent 2g / L 50℃ for 20min, wash and dry to get same color fabric 2.

[0049] Example 3

[0050] S1, take lyocell and anti-shrink wool interwoven double-sided fabric (one side lyocell and one side wool), carry out oxidation pretreatment, add 4g / L weak alkaline refining agent, 50g / L hydrogen peroxide in the treatment bath, 45℃ for 60min, then wash, add oxygenase 8g / L, acetic acid 0.5g / L, stir at room temperature for 10min, then wash and dry to get pretreated fabric 3;

[0051] S2, active yellow 0.003wt%, active red 0.007wt%, active blue 0.157wt%, dyeing inhibitor B 3wt%, anhydrous sodium sulfate 30g / L, soda 10g / L are prepared into dye bath, add pretreated fabric 3, 60℃ for 30min, then wash, soaping agent 1g / L 95℃ soaping 10min, wash and dry to get dyed fabric 3; wherein, dyeing inhibitor B is the same as that of example 2;

[0052] S3, acid yellow 0.001wt%, acid red 0.017wt%, acid blue 0.245wt%, leveling agent 0.5g / L, acid releasing agent 0.5g / L are prepared into dye bath, add dyed fabric 3, 90℃ for 30min, then wash, soaping agent 2g / L 50℃ for 20min, wash and dry to get same color fabric 3.

[0053] Performance test

[0054] To illustrate the synergistic effect of dyeing inhibitor and anhydrous sodium sulfate in the process of dyeing the same color of wool and cellulose fiber blended or interwoven fabric with reactive dyes, the following test comparative examples are compared and verified:

[0055] Comparative example 1

[0056] S1, cotton and shrink-proof wool interwoven double-faced fabric (one side cotton and one side wool) was taken and subjected to oxidative pretreatment, 4 g / L weak alkaline refining agent and 50 g / L hydrogen peroxide were added in the treatment bath, and after treatment at 45°C for 60 min, water washing was performed, 8 g / L oxygen scavenging enzyme and 0.5 g / L acetic acid were added, stirring was performed at room temperature for 10 min, and then water washing and drying were performed, to obtain pretreated fabric 4;

[0057] S2, neutral active red 3 wt%, anhydrous sodium sulfate 120 g / L, and pH stabilizer 1 g / L were prepared into a dye bath, and the pretreated fabric 4 was added, and after heat preservation at 95°C for 60 min, water washing was performed, soaping agent 1 g / L was added, soaping was performed at 95°C for 10 min, and then water washing and drying were performed, to obtain dyed fabric 4.

[0058] The rest of the process was consistent with example 1 except the above parameters in comparative example 1.

[0059] Comparative example 2

[0060] S1, cotton and shrink-proof wool interwoven double-faced fabric (one side cotton and one side wool) was taken and subjected to oxidative pretreatment, 4 g / L weak alkaline refining agent and 50 g / L hydrogen peroxide were added in the treatment bath, and after treatment at 45°C for 60 min, water washing was performed, 8 g / L oxygen scavenging enzyme and 0.5 g / L acetic acid were added, stirring was performed at room temperature for 10 min, and then water washing and drying were performed, to obtain pretreated fabric 5;

[0061] S2, neutral active red 3 wt%, dyeing inhibitor A 4 wt%, anhydrous sodium sulfate 60 g / L, and pH stabilizer 1 g / L were prepared into a dye bath, and the pretreated fabric 5 was added, and after heat preservation at 95°C for 60 min, water washing was performed, soaping agent 1 g / L was added, soaping was performed at 95°C for 10 min, and then water washing and drying were performed, to obtain dyed fabric 5; wherein the dyeing inhibitor A was consistent with example 1.

[0062] The rest of the process was consistent with example 1 except the above parameters in comparative example 2.

[0063] Comparative example 3

[0064] S1, cotton and shrink-proof wool interwoven double-faced fabric (one side cotton and one side wool) was taken and subjected to oxidative pretreatment, 4 g / L weak alkaline refining agent and 50 g / L hydrogen peroxide were added in the treatment bath, and after treatment at 45°C for 60 min, water washing was performed, 8 g / L oxygen scavenging enzyme and 0.5 g / L acetic acid were added, stirring was performed at room temperature for 10 min, and then water washing and drying were performed, to obtain pretreated fabric 6;

[0065] S2, neutral active red 3 wt%, anhydrous sodium sulfate 60 g / L, and pH stabilizer 1 g / L were prepared into a dye bath, and the pretreated fabric 6 was added, and after heat preservation at 95°C for 60 min, water washing was performed, soaping agent 1 g / L was added, soaping was performed at 95°C for 10 min, and then water washing and drying were performed, to obtain dyed fabric 6.

[0066] The rest of the process was consistent with example 1 except the above parameters in comparative example 3.

[0067] Comparative Example 4

[0068] S1, take Lyocell and shrink-resistant wool interwoven double-sided fabric (one side Lyocell and one side wool), carry out oil removal treatment, add 1 g / L oil removal agent in the treatment bath, after 20 min treatment at 80℃, wash, dry, and obtain pretreated fabric 7;

[0069] S2, prepare a dye bath by adding 0.33 wt% of reactive yellow, 0.23 wt% of reactive red, 2.17 wt% of reactive blue, 60 g / L of anhydrous sodium sulfate, and 20 g / L of soda ash, add pretreated fabric 7, keep at 60℃ for 60 min, then wash, soaping agent 1 g / L, soaping at 95℃ for 10 min, wash and dry to obtain dyed fabric 7.

[0070] Comparative Example 4, except for the above parameters, the rest of the process is consistent with Example 2.

[0071] Comparative Example 5

[0072] S1, take Lyocell and shrink-resistant wool interwoven double-sided fabric (one side Lyocell and one side wool), carry out oxidation-reduction pretreatment, add 4 g / L weak alkaline refining agent and 50 g / L hydrogen peroxide in the treatment bath, after 60 min treatment at 45℃, wash, add 8 g / L oxygen scavenging enzyme and 0.5 g / L acetic acid, after 10 min stirring at room temperature, wash and dry to obtain pretreated fabric 8;

[0073] S2, prepare a dye bath by adding 0.003% of reactive yellow, 0.007% of reactive red, 0.157% of reactive blue, 3% of dyeing inhibitor B, 30 g / L of anhydrous sodium sulfate, and 10 g / L of soda ash, add pretreated fabric 8, keep at 60℃ for 30 min, then wash, soaping agent 1 g / L, soaping at 95℃ for 10 min, wash and dry to obtain dyed fabric 8.

[0074] Comparative Example 5, except for the above parameters, the rest of the process is consistent with Example 3.

[0075] Comparative Example 6

[0076] S1, take Lyocell and shrink-resistant wool interwoven double-sided fabric (one side Lyocell and one side wool), carry out oxidation pretreatment, add 4 g / L weak alkaline refining agent and 50 g / L hydrogen peroxide in the treatment bath, after 60 min treatment at 45℃, wash, add 8 g / L oxygen scavenging enzyme and 0.5 g / L acetic acid, after 10 min stirring at room temperature, wash and dry to obtain pretreated fabric 9;

[0077] S2, prepare a dye bath with reactive yellow 0.003 wt%, reactive red 0.007 wt%, reactive blue 0.157 wt%, dyeing inhibitor A 3 wt%, anhydrous sodium sulfate 30 g / L, soda 10 g / L, add pretreated fabric 3, keep at 60°C for 30 min, then wash, soaping agent 1 g / L, soaping at 95°C for 10 min, wash and dry to obtain dyed fabric 9.

[0078] Comparative Example 5, except for the above parameters, the rest of the process is consistent with Example 3.

[0079] Comparative Example 7

[0080] S1, respectively, Lyocell and wool yarns are woven into fabric pieces, and oil removal pretreatment is performed. Add 1 g / L oil removal agent in the treatment bath, keep at 80°C for 20 min, then wash.

[0081] S2, set up an experimental group with reactive blue 3 wt%, anhydrous sodium sulfate 60 g / L, soda 20 g / L, and dyeing inhibitor B 3 wt% in the dye bath, and dye the wool and Lyocell fabric pieces respectively; set up a control group without dyeing inhibitor B, and the rest is consistent with the experimental group, and dye the wool and Lyocell fabric pieces respectively. Keep at 60°C for 60 min, then wash, soaping agent 1 g / L, soaping at 95°C for 10 min, wash and dry.

[0082] The pretreated fabrics of the above examples and test comparative examples are tested for whiteness, and the dyed fabrics of the above examples and test comparative examples are tested for double-sided color difference. The test results are shown in Tables 1-2.

[0083] Table 1. Comparison of wool side and cellulose side color difference of same color fabric

[0084] CIE DL CIE Da CIE Db DE Example 1 0.25 0.14 -0.47 0.55 Example 2 0.17 0.25 -0.25 0.39 Example 3 0.11 0.15 -0.46 0.50

[0085] Note: The wool side is used as the standard to determine the Lab value and color difference of the cellulose side. Among them, CIE DL is the lightness difference, CIE Da is the red-green difference, CIE Db is the yellow-blue difference, DE is the total color difference calculated from the deviation direction and degree of the three dimensions of lightness, red-green, and yellow-blue. The closer DE is to 0, the closer the same color is.

[0086] Table 2. Whiteness of pretreated fabric wool side and double-sided light-dark color difference of dyed fabric

[0087]

[0088]

[0089] Note: The higher the whiteness value, the whiter the fabric. CIE DL is positive, indicating that the sample (cellulose side) is lighter than the standard (wool side), and negative indicates that the sample (cellulose side) is darker than the standard (wool side).

[0090] From the data in Table 1, it can be known that the cellulose fiber surface of Examples 1-3 is almost the same color as the wool surface, which shows that the same color dyeing process of the present solution solves the problem that wool is difficult to be dyed after weaving with cellulose fiber in the prior art to achieve the same color. In addition, combined with Table 2, it can be known that the CIE DL values of the dyed fabric in Examples 1-3 are all negative, that is, the wool surface is more light-colored than the cellulose surface, which shows that the addition of the dyeing inhibitor A or B can hinder the dyeing of wool in its dyeing environment, achieving the effect that cellulose is deeper than wool, which provides a good foundation for the subsequent acid dyeing system that only dyes wool. Among them, the CIE DL value of Comparative Examples 1-3 without simultaneously adding high-concentration sodium sulfate and dyeing inhibitor is positive, and the wool color is stolen from the cellulose fiber, and the color difference exceeds the acceptable range, while the Examples 1-3 of the present solution form a benign color difference effect of wool light and cellulose deep (the higher the CIE DL value, the greater the space for adjusting the color of wool, and the higher the accuracy of the same color of the fabric), which can better facilitate the subsequent adjustment of acid dyeing, thereby realizing the ideal same color fabric effect. The benign color difference of Example 1 and Comparative Example 1-3 is significantly improved, which proves that the high-concentration sodium sulfate and the dyeing inhibitor have a synergistic effect on the dyeing of the active dye on the wool.

[0091] Combined with Table 1 and Figure 1 The CIE DL value of the dyed fabric of Comparative Example 4 without using dyeing inhibitor B is positive and the color difference value is large, while Example 2 shows a benign color difference effect of wool light and cellulose fiber surface deep, which shows that even under the conditions of yellowish wool base color without oxidation bleaching pretreatment, and for ordinary active dyes which are more easily dyed on wool, dyeing inhibitor B can still have a good dyeing inhibition effect on wool, and the same color fabric after completing acid dyeing in Example 2 can present a very low color difference value, see Figure 2 In addition, during the research of the present project, it is found that wool has a selective performance on dyeing inhibitor in ordinary active dyes, and Comparative Example 6 uses dyeing inhibitor A instead of dyeing inhibitor B, which does not improve the problem of wool color stealing, which shows that dyeing inhibitor B has a decisive dyeing inhibition effect on wool in ordinary active dyes.

[0092] The effective component 2,4-dichloro-6-(β-sulfatoethylsulfonyl) aniline-s-triazine of the dyeing inhibitor B of the present solution is originally used as a crosslinking agent, and it is found that it has a good dyeing inhibition effect on wool in ordinary active dyes. In Comparative Example 7, Lyocell and wool yarns are respectively woven into fabric pieces for comparison and verification, combined with Figures 3-4 It can be seen that after the first dyeing, the Lyocell fabric piece dyed with dyeing inhibitor B added ( Figure 3 top side), compared with the Lyocell fabric piece dyed without adding dyeing inhibitor B ( Figure 3The dyeing effect is not greatly affected; while the wool cloth after dyeing with the dye inhibitor B ( Figure 4 Upper side), compared with the wool cloth after dyeing without adding dye inhibitor B ( Figure 4 The lower side) shows that the dyeing blocking effect is significant, which can verify that the dye blocking effect of the dye blocking agent B with the active ingredient of 2,4-dichloro-6-(β-sulfate ethylsulfonyl)aniline-s-triazine on wool is much better than that of cellulose.

[0093] The study on the effect of bleaching pre-treatment on the same color effect in the same color dyeing and finishing process of wool and cellulose fiber blended or interwoven fabrics in this scheme shows that when dyeing light colors (such as Example 3), the oxidation pre-treatment can make the pre-treated fabric have a higher whiteness, which is beneficial to reduce the effect of the yellowish background color of wool on the same color fabric. Traditional oil removal removes most of the oil wax used in spinning and weaving, and cannot remove pigments, but HO in hydrogen peroxide can remove the pigment. 2- The conjugated bonds in the pigment can be broken to eliminate the color, and the pigment intermediates that were not completely degraded during the oxidation stage can be further reduced to colorless compounds using a reducing agent. Dark dyeing (as in Example 2) can still achieve the condition of wool being lighter than cellulose without hydrogen peroxide bleaching, thereby saving some costs. However, Comparative Example 4 shows that although the whiteness of wool can catch up with cellulose fibers, after the redox treatment and with the dye inhibitor B, the wool is still much darker than cellulose fibers. This is because the redox treatment severely damages the wool scale layer, causing the wool intercellular matrix to absorb more dye, deepening the color and exacerbating the color difference. This does not conform to the traditional perception that the whiter the cloth base, the easier it is to dye.

[0094] The technical solution provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A process for dyeing in one colour a fabric of wool and cellulosic fibre blend or cross-ply, characterised in that, The method comprises the following steps: S1, blending or interweaving cellulose fiber and wool, and carrying out boiling and bleaching or oil removal treatment to obtain pretreated fabric; S2, dyeing the pretreated fabric using neutral or common reactive dye and dyeing auxiliary, and then carrying out soaping treatment to obtain wool-light cellulose-dark fabric; the dyeing auxiliary comprises 2-8wt% of dyeing resist, and 20-120g / L of anhydrous sodium sulfate; S3, obtaining same-color fabric by supplementally dyeing the wool-light cellulose-dark fabric with certain acid dye.

2. The process according to claim 1, characterized in that, When the neutral reactive dye is used in S2, the dyeing auxiliary comprises: 2-8wt% of dyeing resist A or dyeing resist B, 80-120g / L of anhydrous sodium sulfate, 0-2g / L of pH stabilizer, 0-2g / L of leveling agent. The dyeing resist A is a complex solution containing aryl sulfonic acid and hydroxy aryl sulfone methyl linkage condensate. The dyeing resist B is a water phase dispersion auxiliary containing 2,4-dichloro-6-(β-sulfate ethyl sulfonamide) aniline-s-triazine.

3. The process according to claim 1, characterized in that, When the common reactive dye is used in S2, the dyeing auxiliary comprises: 2-8wt% of dyeing resist B, 20-60g / L of anhydrous sodium sulfate, 5-30g / L of soda. The dyeing resist B is a water phase dispersion auxiliary containing 2,4-dichloro-6-(β-sulfate ethyl sulfonamide) aniline-s-triazine.

4. The process according to claim 1, characterized in that, In S1, the method further comprises oxidative bleaching treatment.

5. The process according to claim 4, characterized in that, The oxidative bleaching treatment is: adding 2-5g / L of weak alkaline refining agent and 30-50g / L of hydrogen peroxide into a treatment bath, and carrying out treatment at 45-55℃ for 45-60min, and then washing.

6. The process according to claim 5, characterized in that, After the oxidative bleaching treatment, 6-8g / L of oxygen removal enzyme and 0.5-1.2g / L of acetic acid are added, the mixture is stirred at room temperature for 10-15min, and then washed and dried to obtain the pretreated fabric.

7. The process according to claim 1, characterized in that, The dyeing temperature in S2 is 50-100℃, and the dyeing time is 30-90min.

8. The process according to claim 1, characterized in that, The dyeing temperature in S3 is 85-95℃, and the dyeing time is 30-45min.

9. The process according to claim 1, characterized in that, The cellulose fiber comprises one or more of cotton, Durel, Lyocell, Modal, viscose, etc.

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