A multi-component yarn woven fabric and its dyeing process and use

Abstract

A multi-component yarn woven fabric and its dyeing process and use; the dyeing process includes the following steps: pre-treating the multi-component fabric in a pre-treatment solution; washing the multi-component fabric in water; placing the multi-component fabric in an acid wash solution; placing the multi-component fabric in a dyeing solution; the dyeing solution includes: 0.1-1.5 g / L acetic acid, 30-120 g / L sodium sulfate and 0.5-8% (OWF) active dye; adding sodium carbonate to the dyeing solution for the first time; continuing to add sodium sulfate and chelating dispersant; adding active dye; adding sodium carbonate to the dyeing solution for the second time; adding sodium carbonate to the dyeing solution for the third time; washing the multi-component fabric with water and soaping, and then fixing the color. This solution solves the problem of large difference in dyeing effect between natural cotton fiber and artificial cellulose fiber when dyeing existing multi-component fabrics.

Description

Technical Field

[0001] The invention relates to the field of textile dyeing, in particular to a multi-component yarn woven fabric and a dyeing process and application thereof. Background Art

[0002] Multi-component fabrics refer to fabrics woven from yarns blended with cotton and at least one of viscose, rayon, modal, and lyocell. Traditional multi-component fabric dyeing usually uses reactive dyes, and the active base of the dye and the hydroxyl group of the fiber are covalently bonded to achieve the purpose of dyeing; however, there is a difference in the number of hydroxyl groups in the cellulose of natural cotton fiber and artificial cellulose fiber, resulting in different actual dyeing rates of the two; natural cotton fiber dyes slowly and has a low dyeing rate, while artificial cellulose fiber dyes quickly and has a high dyeing rate; and the amount of dye added during the dyeing process is fixed, and different dyeing rates will form a phenomenon of one dark and one light, which seems to affect the purity of the color. Although it is the same color, there is obviously a large color merging, which will increase the return rate and energy consumption, and also lead to increased costs. Summary of the invention

[0003] The purpose of the present invention is to provide a dyeing process for a multi-component yarn woven fabric, which can avoid the graying effect of light and dark colors, reduce rework, and thus save energy and reduce emissions.

[0004] The present invention also provides a multi-component yarn woven fabric, which is dyed by the above dyeing process.

[0005] The invention also provides a use of a multi-component yarn woven fabric in preparing a solid-color textile fabric.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A multi-component yarn woven fabric dyeing process comprises the following steps:

[0008] (1) placing the multi-component fabric in a pretreatment solution for pretreatment;

[0009] (2) washing the multi-component fabric at 20-100°C;

[0010] (3) placing the multi-component fabric in an acid wash solution and reacting at 20 to 50° C.; the acid wash solution includes 0.5 to 2 g / L of acetic acid;

[0011] (4) placing the multi-component fabric in a dyeing solution for reaction at a temperature of 40 to 80° C.; the dyeing solution comprises: 0.1 to 1.5 g / L acetic acid, 30 to 120 g / L sodium sulfate and 0.5 to 8% (OWF) of a reactive dye;

[0012] After the reaction, 0.5-1 g / l of sodium carbonate is added to the dyeing solution for the first time;

[0013] After the reaction, continue to add 30-180 g / L of sodium sulphate and 0.5-2 g / L of chelating dispersant;

[0014] After the reaction, add 0.5-8% (OWF) of reactive dye;

[0015] After the reaction, 0.5 to 2 g / l of sodium carbonate is added to the dyeing solution for the second time;

[0016] After the reaction, 5-25 g / l of sodium carbonate is added to the dyeing solution for the third time;

[0017] (5) After washing and soaping the multi-component fabric, the color is fixed.

[0018] Preferably, in step (1), the multi-component fabric is a combination of at least one of viscose fiber, rayon, modal and lyocell blended with natural cotton fiber;

[0019] In the step (4), the reactive dye is at least one or a combination of yellow M-3RE, light red SE, blue ECR, orange HS-3RW, brick red SE, orange CNE, dark red LC-DB and navy blue CK-ZW.

[0020] Preferably, in step (4), when sodium carbonate is added to the dyeing solution for the third time, the sodium carbonate is added continuously in an increasing curve manner, and the amount is increased to 70% within 15 to 40 minutes.

[0021] Preferably, in step (4), the reaction is allowed to proceed for at least 5 minutes after sodium carbonate is first added to the dyeing solution;

[0022] After adding sodium carbonate to the dye solution for the second time, let it react for at least 10 minutes;

[0023] After adding sodium carbonate to the dye solution for the third time, let it react for at least 30 minutes;

[0024] In the step (4), the pH value is gradually increased from 6.5 to 7.5 to 10 to 11.

[0025] Preferably, in step (1), the pH regulator is 2-6 g / L of sodium hydroxide or sodium carbonate.

[0026] Preferably, in step (2), the multi-component fabric is placed at 60-100° C. for a first wash; then the multi-component fabric is placed at 20-80° C. for a second wash; the first wash temperature is greater than the second wash temperature.

[0027] Preferably, in step (1), the pretreatment liquid comprises at least one of a scouring agent, a degreasing agent, hydrogen peroxide and a pH adjuster.

[0028] A multi-component yarn woven fabric is dyed by the multi-component yarn woven fabric dyeing process.

[0029] A use of a multi-component yarn woven fabric in preparing a solid-color textile fabric, wherein the multi-component yarn woven fabric is the multi-component yarn woven fabric mentioned above.

[0030] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0031] The present invention provides a dyeing process for a multi-component yarn woven fabric, which can avoid the graying effect of light and dark colors, reduce rework, and thus save energy and reduce emissions, thereby solving the problem of large difference in dyeing effect between natural cotton fiber and artificial cellulose fiber when dyeing existing multi-component fabrics. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The following embodiments are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] For ease of understanding of the present invention, the present invention is described more fully below. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. If no specific technology or conditions are indicated in the embodiments, the technology or conditions described in the documents in this area or the product instructions are carried out. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products that can be obtained by commercial purchase.

[0034] A multi-component yarn woven fabric dyeing process comprises the following steps:

[0035] (1) placing the multi-component fabric in a pretreatment solution for pretreatment;

[0036] The pre-treatment liquid can pre-treat the multi-component fabric to provide the required dyeing surface for the subsequent dyeing liquid.

[0037] (2) washing the multi-component fabric at 20-100°C;

[0038] After the multi-component fabric is pre-treated, it needs to be washed to remove the residual pre-treatment liquid to prevent the pre-treatment liquid from affecting the subsequent dyeing;

[0039] (3) placing the multi-component fabric in an acid wash solution and reacting at 20 to 50° C.; the acid wash solution includes 0.5 to 2 g / L of acetic acid;

[0040] Acid washing can remove impurities and improve the gloss of multi-component fabrics, while providing acidity to multi-component fabrics;

[0041] (4) placing the multi-component fabric in a dyeing solution for reaction at a temperature of 40 to 80° C.; the dyeing solution comprises: 0.1 to 1.5 g / L acetic acid, 30 to 120 g / L sodium sulfate and 0.5 to 8% (OWF) of a reactive dye;

[0042] After the reaction, 0.5-1 g / l of sodium carbonate is added to the dyeing solution for the first time;

[0043] After the reaction, continue to add 30-180 g / L of sodium sulphate and 0.5-2 g / L of chelating dispersant;

[0044] After the reaction, add 0.5-8% (OWF) of reactive dye;

[0045] After the reaction, 0.5 to 2 g / l of sodium carbonate is added to the dyeing solution for the second time;

[0046] After the reaction, 5-25 g / l of sodium carbonate is added to the dyeing solution for the third time;

[0047] This solution controls the ratio of dyeing liquid step by step during the dyeing process. Sodium sulfate can be added after adding active dyes. Sodium sulfate is combined with multi-stage dyeing temperature to first adsorb on cotton fibers, and then under the joint repulsion of chelating dispersants, viscose, rayon, modal, lyocell and cotton are dyed and fixed simultaneously, and the color and fastness meet the requirements.

[0048] Chelating dispersants can be purchased randomly on the market, such as the conventional chelating dispersant DM-8103A; it can soften water and has a great effect on Ca 2+ Mg 2+ , Fe 3+ Metal ions such as chlorinated polyols have strong chelating and scum dispersing power, which can prevent the formation of sediments and scum produced by other dirt during dyeing and finishing, and can slowly dissolve and remove silica scale, calcium soap sediments and oligomers in the equipment, prevent metal salts from contaminating various fibers again, improve the whiteness, brightness and color fastness of bleaching, dyeing and printing products, and prevent the white background of printed products and yarn-dyed products from being contaminated again.

[0049] OWF is a term in the dyeing process, generally referring to the concentration unit, the ratio of the weight of the dye to the fabric. (owf) = On weight of the fabric In the dyeing and finishing process, the concentration is based on the weight of the fabric, relative to the percentage of the fabric.

[0050] (5) After washing and soaping the multi-component fabric, the color is fixed.

[0051] Water washing can remove the dyeing solution and reactive dyes in step (4); soap washing can clean the unfixed reactive dyes and hydrolyzed reactive dyes on the fiber surface to prevent the residual reactive dyes from affecting the color and color fastness. The color fixing agent is an auxiliary agent that can be directly purchased on the market, such as color fixing agent TF234HX, color fixing agent DM-2518, etc., which can be selected according to the effect.

[0052] The present invention provides a dyeing process for a multi-component yarn woven fabric, which can avoid the graying effect of light and dark colors, reduce rework, and thus save energy and reduce emissions, thereby solving the problem of large difference in dyeing effect between natural cotton fiber and artificial cellulose fiber when dyeing existing multi-component fabrics.

[0053] Preferably, in step (1), the multi-component fabric is a combination of at least one of viscose fiber, rayon, modal and lyocell blended with natural cotton fiber;

[0054] In the step (4), the reactive dye is at least one or a combination of yellow M-3RE, light red SE, blue ECR, orange HS-3RW, brick red SE, orange CNE, dark red LC-DB and navy blue CK-ZW.

[0055] The dyeing process of the multi-component yarn woven fabric of this scheme can be particularly targeted at the multi-component fabric formed by the combination of viscose fiber / rayon / modal / lyocell and natural cotton fiber, and the reactive dyes mainly including yellow M-3RE, light red SE, blue ECR, orange HS-3RW, brick red SE, orange CNE, dark red LC-DB and navy blue CK-ZW are attached, and the requirements of washing fastness and light fastness are met.

[0056] Preferably, in step (4), when sodium carbonate is added to the dyeing solution for the third time, the sodium carbonate is added continuously in an increasing curve manner, and the amount is increased to 70% within 15 to 40 minutes.

[0057] This scheme is to control the proportion of dyeing liquid step by step, adding sodium carbonate three times, which can adjust the pH value of dyeing liquid to promote the covalent bond reaction of active dyes and cellulose hydroxyl groups to fix the color; when 0.5-1g / l of sodium carbonate is added for the first time, the pickling liquid can be neutralized; when 0.5-2g / l of sodium carbonate is added for the second time, it mainly plays a role in promoting the covalent bond reaction of active dyes and cellulose hydroxyl groups to fix the color. The third curve addition of 5-25g / l of sodium carbonate can quickly increase the pH value to about 10.8 to further promote the covalent bond reaction of active dyes and cellulose hydroxyl groups to fix the color. In this way, adding sodium carbonate in batches multiple times is to slowly increase the pH value (the pH gradually rises from 7 to around 10.8) to further achieve uniform fixation and avoid color difference and dyeing of multi-component fabrics.

[0058] Preferably, in step (4), the reaction is allowed to proceed for at least 5 minutes after sodium carbonate is first added to the dyeing solution;

[0059] After adding sodium carbonate to the dye solution for the second time, let it react for at least 10 minutes;

[0060] After adding sodium carbonate to the dye solution for the third time, let it react for at least 30 minutes;

[0061] In the step (4), the pH value is gradually increased from 6.5 to 7.5 to 10 to 11.

[0062] Different concentrations of sodium carbonate are added to the dyeing solution in batches, and the pH gradually increases from 6.5 to 7.5 to 10 to 11. The sodium carbonate added each time can make the sodium carbonate in each concentration range fully react, so as to keep the active dye and the cellulose hydroxyl group to react and fix the color by covalent bonds. The fixing effect is better according to this reaction time. In the best embodiment, the dyeing solution reacts for 5 to 10 minutes after the first addition of sodium carbonate, the dyeing solution reacts for 10 to 30 minutes after the second addition of sodium carbonate; and the dyeing solution reacts for 30 to 80 minutes after the third addition of sodium carbonate.

[0063] Preferably, in step (1), the pH regulator is 2-6 g / L of sodium hydroxide or sodium carbonate.

[0064] The pH adjuster can be selected as a strong base or a weak base according to the pretreatment needs. The strong base can remove impurities.

[0065] Preferably, in step (2), the multi-component fabric is placed at 60-100° C. for a first wash; then the multi-component fabric is placed at 20-80° C. for a second wash; the first wash temperature is greater than the second wash temperature.

[0066] This scheme preferably performs two water washing processes, the temperature of the first water washing is higher than the temperature of the second water washing, mainly because the first water washing temperature of 60-100°C can ensure that the pretreatment liquid is fully removed, and the temperature of 20-80°C is mainly to gradually cool the multi-component fabric during the water washing, so that the temperature of the multi-component fabric meets or approaches the acid washing temperature of the subsequent step (3), thereby reducing the waiting time.

[0067] Preferably, in step (1), the pretreatment liquid comprises at least one of a scouring agent, a degreasing agent, hydrogen peroxide and a pH adjuster.

[0068] The pretreatment liquid can be used for pretreatment of multi-component fabrics, and it is provided with a scouring agent, a degreasing agent, hydrogen peroxide and a pH regulator as required, more specifically 0.5-4 g / L of a scouring agent, 1-4 g / L of a degreasing agent, 2-6 g / L of hydrogen peroxide and 2-6 g / L of a pH regulator; the scouring agent can remove impurities and oil stains on the multi-component fabrics, and has the functions of penetration, emulsification, washing, dispersion and wetting, and is directly available on the market, such as alkyl polyglycol ether; the degreasing agent removes lubricating grease, carbon agent, mildew stains, etc. on the surface of the multi-component fabrics, and is directly available on the market; hydrogen peroxide can make the multi-component fabrics brighter after treatment; the pH regulator can adjust the pH value of the pretreatment liquid and be used in conjunction with subsequent dyeing. The pretreatment liquid can pretreat the multi-component fabrics, thereby providing the required dyeing surface for the subsequent dyeing liquid.

[0069] A multi-component yarn woven fabric is dyed by the multi-component yarn woven fabric dyeing process.

[0070] A use of a multi-component yarn woven fabric in preparing a solid-color textile fabric, wherein the multi-component yarn woven fabric is the multi-component yarn woven fabric mentioned above.

[0071] Performance tests involved in this solution:

[0072] Color computer value: fabrics with different compositions are dyed, soaped and dried in the same cup; the computer value of the same color is measured by DATACOLORSPECTRO 1000. The closer the computer values ​​of the two fabrics dyed in the same cup are, the better the synchronous dyeing effect is. The results are expressed in DL, Da, Db, and DE. Among them, L represents black and white. A positive value of L indicates that the sample is whiter than the standard sample, otherwise it is black; a represents red and green. A positive value of a indicates that the sample is redder than the standard sample, otherwise it is green; b represents yellow and blue. If b is a positive value, the sample is yellower than the standard sample, otherwise it is bluer. The size of the DE value reflects the visibility of the color difference:

[0073] When DE is between 0-1, the color difference is almost indistinguishable to the naked eye.

[0074] When DE is between 1-2, the color difference is still not obvious.

[0075] When the DE is between 2-3, you can start to notice slight differences in color.

[0076] When DE is between 3.5-5, the color difference becomes obvious.

[0077] When DE exceeds 5, the two colors are seen as distinct hues.

[0078] Color fastness: Test color fastness according to "Color fastness to washing test standard GB / T 3921".

[0079] Light fastness: Test light fastness according to “Color fastness of textiles to artificial light GB / T 8427”.

[0080] Embodiment: Contains embodiment 1, embodiment 2 and embodiment 3.

[0081] Embodiment 1:

[0082] A multi-component yarn woven fabric dyeing process comprises the following steps:

[0083] (1) placing the multi-component fabric in a pretreatment solution for pretreatment;

[0084] The pretreatment liquids used 3g / L of scouring agent, 3g / L of degreasing agent, 4g / L of hydrogen peroxide and 3g / L of sodium carbonate respectively;

[0085] The multi-component fabrics are 50s fine cotton compact spinning + 20D stretch plain weave and 40s modal compact spinning + 30D stretch plain weave.

[0086] (2) washing the pretreated multi-component fabric at 90° C.; washing the boiled multi-component fabric at 50° C.;

[0087] (3) placing the multi-component fabric in an acid wash solution and reacting it at 50° C. for 15 minutes; the acid wash solution is 1 g / L acetic acid;

[0088] (4) placing the multi-component fabric in a dyeing solution and reacting it at a temperature of 50° C. for 10 minutes; the dyeing solution comprises: 1 g / L acetic acid, 60 g / L sodium sulfate and 5% (OWF) reactive dye;

[0089] After the reaction, 1 g / l sodium carbonate was added to the dye solution for the first time and reacted for 10 minutes;

[0090] After the reaction, 60 g / L of sodium sulphate and 1 g / L of chelating dispersant DM-8103A were added and the reaction was continued for 10 minutes;

[0091] After the reaction, 5% (OWF) of active dye was added and reacted for 20 minutes; the active dye was blue ECR;

[0092] After the reaction, 2 g / l of sodium carbonate was added to the dye solution for a second time and reacted for 30 minutes;

[0093] After the reaction, 20 g / l sodium carbonate was added to the dye solution for the third time, increasing by 70% over 30 minutes, and the reaction lasted for 80 minutes;

[0094] (5) The dyed multi-component fabric is washed in hot water at 60°C for 20 minutes; the washed multi-component fabric is reacted in a soap solution at 90°C for 20 minutes, wherein the soap solution contains 2g / l of a non-ionic soaping agent; the soaped multi-component fabric is washed at 60°C; the washed multi-component fabric is reacted in a fixing solution at 40°C for 20 minutes, wherein the fixing solution contains 2g / l of a cationic fixing agent.

[0095] Embodiment 2:

[0096] A multi-component yarn woven fabric dyeing process comprises the following steps:

[0097] (1) placing the multi-component fabric in a pretreatment solution for pretreatment;

[0098] The pretreatment solution used: 2g / L scouring agent, 3g / L degreasing agent, 4g / L hydrogen peroxide and 3g / L sodium hydroxide;

[0099] The multi-component fabrics are 50s fine cotton compact spinning + 20D drawstring plain weave and 60s modal / rayon compact spinning + 20D drawstring plain weave;

[0100] (2) washing the pretreated multi-component fabric at 80°C; washing the boiled multi-component fabric at 60°C;

[0101] (3) placing the multi-component fabric in an acid wash solution and reacting it at 30° C. for 20 minutes; the acid wash solution includes 0.5 g / L acetic acid;

[0102] (4) placing the multi-component fabric in a dyeing solution and reacting it at a temperature of 40° C. for 10 minutes; the dyeing solution comprises: 1.5 g / L acetic acid, 30 g / L sodium sulfate and 1% (OWF) reactive dye;

[0103] After the reaction, 0.5 g / l sodium carbonate was added to the dye solution for the first time and reacted for 5 minutes;

[0104] After the reaction, 30 g / L of sodium sulphate and 1 g / L of chelating dispersant DM-8103A were added and the reaction was continued for 10 minutes;

[0105] After the reaction, 0.5% (OWF) of reactive dye was added and reacted for 30 minutes; the reactive dye was light red SE;

[0106] After the reaction, 0.5 g / l of sodium carbonate was added to the dye solution for a second time and reacted for 30 minutes;

[0107] After the reaction, 5 g / l sodium carbonate was added to the dye solution for the third time, increasing by 70% over 40 minutes, and reacting for 50 minutes;

[0108] (5) The dyed multi-component fabric is washed in hot water at 80°C for 20 minutes; the washed multi-component fabric is reacted in a soap solution at 90°C for 30 minutes, wherein the soap solution contains 1g / l of a non-ionic soaping agent; the soaped multi-component fabric is washed at 50°C; the washed multi-component fabric is reacted in a fixing solution at 50°C for 20 minutes, wherein the fixing solution contains 1g / l of a cationic fixing agent.

[0109] Embodiment 3:

[0110] A multi-component yarn woven fabric dyeing process comprises the following steps:

[0111] (1) placing the multi-component fabric in a pretreatment solution for pretreatment;

[0112] The pre-treatment liquids used 0.5 g / L of scouring agent, 4 g / L of degreasing agent, and 1 g / L of hydrogen peroxide.

[0113] The multi-component fabric is 50s fine cotton compact spinning + 20D stretched plain weave and 50S Tencel + 30D spandex;

[0114] (2) washing the pretreated multi-component fabric at 70°C; washing the boiled multi-component fabric at 50°C;

[0115] (3) placing the multi-component fabric in an acid wash solution and reacting it at 30° C. for 20 minutes; the acid wash solution includes 2 g / L acetic acid;

[0116] (4) placing the multi-component fabric in a dyeing solution and reacting it at a temperature of 50° C. for 10 minutes; the dyeing solution comprises: 1.5 g / L acetic acid, 120 g / L sodium sulfate and 8% (OWF) reactive dye;

[0117] After the reaction, 1 g / l sodium carbonate was added to the dye solution for the first time and reacted for 10 minutes;

[0118] After the reaction, 180 g / L of sodium sulphate and 2 g / L of chelating dispersant DM-8103A were added and reacted for 5 minutes;

[0119] After the reaction, add 2% (OWF) of active dye and react for 15 minutes; the active dye is navy blue CK-ZW;

[0120] After the reaction, 2 g / l of sodium carbonate was added to the dye solution for a second time and reacted for 10 minutes;

[0121] After the reaction, 5 g / l sodium carbonate was added to the dye solution for the third time, increasing by 70% over 20 minutes, and reacting for 80 minutes;

[0122] (5) The dyed multi-component fabric is washed in hot water at 60°C for 20 minutes; the washed multi-component fabric is reacted in a soap solution at 80°C for 20 minutes, wherein the soap solution contains 4 g / l of a non-ionic soaping agent; the soaped multi-component fabric is washed at 30°C; the washed multi-component fabric is reacted in a fixing solution at 50°C for 20 minutes, wherein the fixing solution contains 1 g / l of a cationic fixing agent.

[0123] Comparative Example:

[0124] The basic steps of the comparative example are basically the same as those of the example, except that the comparative example uses a conveying process, specifically the addition order of step (4) is different. The comparative example first adds the sodium carbonate corresponding to the example at one time, then adds the same active dye, and then adds the same sodium sulfate and chelating dispersant DM-8103A. The total reaction time of the comparative example is the same as that of the example.

[0125] The embodiments and comparative examples were subjected to performance tests, and the results are shown in Tables 1-3.

[0126] Table 1 - Performance comparison between Example 1 and Comparative Example 1

[0127]

[0128] Table 2 - Performance comparison between Example 2 and Comparative Example 2

[0129]

[0130] Table 3 - Performance comparison between Example 3 and Comparative Example 3

[0131]

[0132] As can be seen from Table 1, for the reactive dye blue ECR, the washing fastness and light fastness of Example 1 are the same as those of Comparative Example 1. However, in the color computer value, the color computer value corresponding to cotton in Example 1 is close to the color computer value corresponding to modal, and the difference is smaller than that of Comparative Example 1, indicating that the better the synchronous dyeing effect, the closer the color purity. In particular, DE reflects the visibility of color difference. The DE of Example 1 is 0.74, which means that the coloring difference between cotton and modal is almost indistinguishable to the naked eye. In Comparative Example 1, DE is 1.1, which has a certain difference, but it is not obvious.

[0133] Similarly, it can be seen from Table 2 that for the reactive dye light red SE, the washing fastness and light fastness of Example 2 are the same as those of Comparative Example 2; the cotton and modal of Comparative Example 2 have a large difference in black and white; the cotton and modal of Example 2 have a large difference in yellow and blue. However, the DE of Example 2 is 0.78, and the DE of Comparative Example 2 is 1.94, and the color difference of Example 2 is less than 2-3 times that of Comparative Example 2.

[0134] As shown in Table 3, for the reactive dye navy blue CK-ZW, the washing fastness and light fastness of Example 3 are the same as those of Comparative Example 3; the cotton and modal of Comparative Example 3 have large differences in black and white and red and green. The DE of Example 3 is 0.37, while the DE of Comparative Example 2 is 2.25, and the color difference of Example 2 is less than 6-7 times that of Comparative Example 2.

[0135] In summary, the dyeing process of the multi-component yarn woven fabric of the present scheme can avoid the graying effect of color depth, reduce repairs, and thus save energy and reduce emissions, thereby solving the problem of large difference in dyeing effects between natural cotton fibers and artificial cellulose fibers when dyeing existing multi-component fabrics.

[0136] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A multi-component yarn woven fabric dyeing process, characterized in that: The following steps are involved: (1) placing the multi-component fabric in a pretreatment solution for pretreatment; (2) washing the multi-component fabric at 20-100°C; (3) placing the multi-component fabric in an acid wash solution and reacting at 20 to 50° C.; the acid wash solution includes 0.5 to 2 g / L of acetic acid; (4) placing the multi-component fabric in a dyeing solution for reaction at a temperature of 40 to 80° C.; the dyeing solution comprises: 0.1 to 1.5 g / L acetic acid, 30 to 120 g / L sodium sulfate and 0.5 to 8% (OWF) of a reactive dye; After the reaction, 0.5-1 g / l of sodium carbonate is added to the dyeing solution for the first time; After the reaction, continue to add 30-180 g / L of sodium sulphate and 0.5-2 g / L of chelating dispersant; After the reaction, add 0.5-8% (OWF) of reactive dye; After the reaction, 0.5 to 2 g / l of sodium carbonate is added to the dyeing solution for the second time; After the reaction, 5 to 25 g / l of sodium carbonate is added to the dyeing solution for the third time; (5) After washing and soaping the multi-component fabric, the color is fixed.

2. A multi-component yarn woven fabric dyeing process according to claim 1, characterized in that: In the step (1), the multi-component fabric is a combination of at least one of viscose fiber, rayon, modal and lyocell blended with natural cotton fiber; In the step (4), the reactive dye is at least one or a combination of yellow M-3RE, light red SE, blue ECR, orange HS-3RW, brick red SE, orange CNE, dark red LC-DB and navy blue CK-ZW.

3. A multi-component yarn woven fabric dyeing process according to claim 1, characterized in that: In the step (4), when sodium carbonate is added to the dyeing solution for the third time, the sodium carbonate is added continuously in a curve increasing manner, and the amount is required to increase to 70% within 15 to 40 minutes.

4. A multi-component yarn woven fabric dyeing process according to claim 3, characterized in that: In the step (4), the dyeing solution is reacted for at least 5 minutes after sodium carbonate is first added to the dyeing solution; After adding sodium carbonate to the dye solution for the second time, let it react for at least 10 minutes; After adding sodium carbonate to the dye solution for the third time, let it react for at least 30 minutes; In the step (4), the pH value is gradually increased from 6.5 to 7.5 to 10 to 11.

5. A multi-component yarn woven fabric dyeing process according to claim 1, characterized in that: In the step (1), the pH adjuster is 2-6 g / L of sodium hydroxide or sodium carbonate.

6. A multi-component yarn woven fabric dyeing process according to claim 1, characterized in that: In the step (2), the multi-component fabric is placed at 60-100° C. for a first water wash; then the multi-component fabric is placed at 20-80° C. for a second water wash; the first water wash temperature is higher than the second water wash temperature.

7. A multi-component yarn woven fabric dyeing process according to claim 1, characterized in that: In the step (1), the pretreatment liquid includes at least one of a scouring agent, a degreasing agent, hydrogen peroxide and a pH adjuster.

8. A multi-component yarn woven fabric, characterized in that: Dyeing by a multi-component yarn woven fabric dyeing process as described in any one of claims 1-7.

9. Use of a multi-component yarn woven fabric in preparing a solid color textile fabric, characterized in that: The multi-component yarn woven fabric is a multi-component yarn woven fabric as described in claim 8.

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