Dyeing process of multi-component wool fabric, dyed fabric and application thereof

Abstract

The present invention provides a dyeing process for multi-component wool fabric, dyed fabric and application thereof. The dyeing process comprises the following steps: degreasing the multi-component wool fabric, dyeing with a reactive dye solution, soaping once, dyeing with an acid dye solution, soaping twice, to obtain a dyed fabric; the pH of the reactive dye solution is 9.5 to 10.5, and the pH of the acid dye solution is 4.5 to 5.5. The dyeing process for multi-component wool fabric provided by the present invention can solve the problem of poor level dyeing of multi-component wool fabric, and the obtained dyed fabric has good color fastness, stable color light and good same color effect.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles, and in particular relates to a dyeing process of a multi-component wool fabric, a dyed fabric and applications thereof. Background Art

[0002] Wool is an excellent natural protein fiber. It is deeply loved by people for its excellent moisture absorption, elasticity, breathability, warmth retention, comfort and unique garment effect.

[0003] The price of wool fabrics is relatively high. Wool worsted is generally used for 100% wool luxury goods, and the consumer group is relatively limited. Secondly, wool fabrics are prone to pilling, shrinkage and deformation. The market generally reduces costs and improves performance by blending wool with other fibers. The dyeing process of wool and its fabrics usually produces problems such as uneven dyeing depth and color spots. Multi-component wool fabrics made by blending wool with other fibers are more prone to a series of problems such as poor level dyeing, low color fastness, and unstable color reproducibility due to the different adsorption capacity of wool and other fibers for dyes, which ultimately affects the appearance and performance.

[0004] CN103981737A discloses a same-color dyeing process for wool / nylon blended fabrics, which comprises at least the following steps: a. fabric washing: washing the blended fabric in warm water at 40°C, removing impurities and then dehydrating; b. dye liquor preparation: adding 1-2% owf active dye, 2-4% owf ammonium sulfate, 1.5-3.0 g / L dye inhibitor, 1-3% owf leveling agent into a dyeing machine, and adjusting the pH value of the dye liquor to 4.5-5 with acetic acid; c. dyeing: placing the washed fabric in the dye liquor, bathing The ratio is 1:(15-30); start dyeing at room temperature, heat up to 60℃ at a rate of 3℃ / min, and then heat up to 95-98℃ at a rate of 1-2℃ / min, and keep warm for dyeing for 1 hour; d. Post-treatment: after dyeing, change a new bath, adjust the pH value to 8-8.5 with ammonia water, and treat at 80℃ for 15 minutes to further fix the color and wash away the floating color; e. Washing: wash with hot water and then rinse thoroughly with cold water; f. Drying: after dehydrating the blended fabric, pre-bake it at 70-80℃ for 3-5 minutes; then bake the pre-bake blended fabric at 80-130℃ for 1-2 minutes. The same-color dyeing process provided by this technical solution has good same-color dyeing and dyeing fastness for wool / nylon blended fabrics, but the dyeing temperature is high. If not handled properly, it is easy to cause wool damage, resulting in decreased fiber strength, reduced elongation, deterioration of tensile properties, reduced fiber elasticity and easy brittleness, decreased fluffiness and other problems. Moreover, it is only for wool / nylon blended fabrics and has high limitations on fibers.

[0005] Therefore, it is necessary to develop a dyeing process for multi-component wool fabrics with less damage to wool and good level dyeing properties. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a dyeing process for multi-component wool fabric, dyed fabric and application thereof. The dyeing process for multi-component wool fabric can solve the problem of poor level dyeing of multi-component wool fabric, and the obtained dyed fabric has good color fastness, stable color light and good same color effect.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a dyeing process for a multi-component wool fabric, the dyeing process comprising the following steps: degreasing the multi-component wool fabric, dyeing with a reactive dye solution, soaping once, dyeing with an acid dye solution, soaping twice, to obtain a dyed fabric;

[0009] The pH of the reactive dye solution is 9.5-10.5, and the pH of the acid dye solution is 4.5-5.5.

[0010] In the present invention, the dyeing process of the multi-component wool fabric is carried out by degreasing, dyeing with active dye solution, primary soaping, acid dye solution dyeing and secondary soaping to dye the multi-component wool fabric, which can solve the problem of poor level dyeing of the multi-component wool fabric. The prepared dyed fabric has good color fastness, stable color light, good same color effect and little damage to the wool.

[0011] Preferably, the multi-component wool fabric includes the following components in mass percentage: 30% to 40% wool (for example, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38% or 39%, etc.), 50% to 60% lyocell fiber (for example, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58% or 59%, etc.) and 10% to 20% nylon fiber (for example, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18% or 19%, etc.).

[0012] In the present invention, degreasing is performed to avoid uneven dyeing, and lyocell fiber and wool are dyed with reactive dyes. In this process, the coloring performance of lyocell fiber is better than that of wool. One soap washing can remove floating color attached to the fiber, and the fastness is improved. Then, nylon fiber and wool are dyed with acid dyes. In this process, the coloring performance of nylon fiber is higher than that of wool. Both reactive dyes and acid dyes can dye wool, so that the dyeing uniformity of wool, nylon fiber and lyocell fiber can be kept consistent. Secondary soap washing can wash away the staining on each fiber, and reverse staining is prevented, which causes color spots.

[0013] In the present invention, the pH of the reactive dye solution is 9.5-10.5. The reason is that wool is acid-resistant but not alkali-resistant. When the pH is too high, the wool will be damaged to a certain extent, affecting the structure and performance of the multi-component wool fabric. When the pH is too low, the fixation of the reactive dye to the lyocell fiber will be affected, which will ultimately affect the dyeing fastness of the multi-component wool fabric, reduce the color uptake rate of the lyocell fiber, and further affect the dyeing uniformity of the multi-component fabric.

[0014] In the present invention, the pH of the acid dye solution is 4.5-5.5, because if the pH of the acid dye solution is lower than the isoelectric point of the fiber, the fiber surface is positively charged, which is conducive to combining with the acid dye anion, thereby improving the dyeing rate; if the pH of the acid dye solution is higher than the isoelectric point of the fiber, the fiber surface is negatively charged, the ability to combine with the acid dye is weakened, and the dyeing rate is reduced. Accurately controlling the pH during the dyeing process can optimize the dyeing rate and levelness of the acid dye, thereby improving the dyeing quality and production efficiency.

[0015] Preferably, the wool is shrink-proof wool.

[0016] Preferably, the lyocell fiber is a compact siro-spun lyocell fiber.

[0017] Preferably, the nylon fiber is bio-based nylon fiber.

[0018] Preferably, the multi-component wool fabric is a weft knitted fabric.

[0019] Preferably, the degreasing temperature is 75-85°C (for example, 76°C, 77°C, 78°C, 79°C, 80°C, 81°C, 82°C, 83°C or 84°C, etc.), and the time is 20-30 min (for example, 21 min, 22 min, 23 min, 24 min, 25 min, 26 min, 27 min, 28 min or 29 min, etc.).

[0020] Preferably, the degreasing working fluid in the degreasing process comprises the following components: a refined degreasing agent, soda ash and water.

[0021] Preferably, the concentration of the scouring deoiling agent in the deoiling working solution is 2-3 g / L, for example, 2.1 g / L, 2.2 g / L, 2.3 g / L, 2.4 g / L, 2.5 g / L, 2.6 g / L, 2.7 g / L, 2.8 g / L or 2.9 g / L.

[0022] Preferably, the concentration of soda ash in the degreasing working solution is 0.5-2 g / L, for example, 0.7 g / L, 0.9 g / L, 1.1 g / L, 1.3 g / L, 1.5 g / L, 1.7 g / L or 1.9 g / L.

[0023] Preferably, the dyeing temperature of the reactive dye solution is 60-70° C. (for example, 61° C., 62° C., 63° C., 64° C., 65° C., 66° C., 67° C., 68° C. or 69° C.), and the dyeing time is 45-60 min (for example, 47 min, 49 min, 51 min, 53 min, 55 min, 57 min or 59 min, etc.).

[0024] Preferably, the reactive dye liquor comprises the following components: a chelating dispersant, soda ash, sodium sulfate, reactive dye for cotton and water.

[0025] Preferably, the chelating dispersant in the reactive dye liquor includes Kunshan Mingjia Sinquest CA-170 and / or Yihua Chemical YH-50.

[0026] Preferably, the reactive dye for cotton is an azo reactive dye.

[0027] Preferably, the azo reactive dye includes any one of KAYACION YELLOW CF-COM, KAYACION RED CF-COM or KAYACION BLUE CF-COM produced by Huayao Chemical Co., Ltd., or a combination of at least two thereof.

[0028] Preferably, the concentration of the chelating dispersant in the reactive dye liquor is 0.5-2 g / L, for example, 0.7 g / L, 0.9 g / L, 1.1 g / L, 1.3 g / L, 1.5 g / L, 1.7 g / L or 1.9 g / L.

[0029] Preferably, the concentration of soda ash in the reactive dye solution is 8-12 g / L, for example, 8.5 g / L, 9 g / L, 9.5 g / L, 10 g / L, 10.5 g / L, 11 g / L or 11.5 g / L.

[0030] Preferably, the concentration of Glauber's salt in the reactive dye solution is 40-60 g / L, for example, 42 g / L, 44 g / L, 46 g / L, 48 g / L, 50 g / L, 52 g / L, 54 g / L, 56 g / L or 58 g / L.

[0031] Preferably, the mass percentage concentration of the reactive dye for cotton in the reactive dye liquor is 0.5% to 4%, for example, 1%, 1.5%, 2%, 2.5%, 3% or 3.5%.

[0032] Preferably, the method for preparing the reactive dye solution comprises the following steps: heating water to 40-45°C (40.5°C, 41°C, 41.5°C, 42°C, 42.5°C, 43°C, 43.5°C, 44°C or 44.5°C, etc.), and then sequentially adding a chelating dispersant, soda ash, sodium sulfate and reactive dye for cotton to obtain the reactive dye solution.

[0033] Preferably, the bath ratio of the reactive dye dyeing is 1:(10-15), for example, 1:10.5, 1:11, 1:11.5, 1:12, 1:12.5, 1:13, 1:13.5, 1:14 or 1:14.5, etc.

[0034] Preferably, the temperature of the soap washing is 75-85°C (for example, 76°C, 77°C, 78°C, 79°C, 80°C, 81°C, 82°C, 83°C or 84°C, etc.), and the time is 20-30 min (for example, 21 min, 22 min, 23 min, 24 min, 25 min, 26 min, 27 min, 28 min or 29 min, etc.).

[0035] Preferably, the soaping working solution of the primary soaping comprises soaping agent, acetic acid and water.

[0036] Preferably, the soaping agent in the soaping working solution of the primary soaping includes Kunshan Mingjia RC-425A.

[0037] Preferably, the concentration of the soaping agent in the soaping working solution of the first soaping is 3-4 g / L, for example, 3.1 g / L, 3.2 g / L, 3.3 g / L, 3.4 g / L, 3.5 g / L, 3.6 g / L, 3.7 g / L, 3.8 g / L or 3.9 g / L.

[0038] Preferably, the concentration of acetic acid in the soaping working solution of the first soaping is 0.1-0.5 g / L, for example, 0.55 g / L, 0.6 g / L, 0.65 g / L, 0.7 g / L, 0.75 g / L, 0.8 g / L, 0.85 g / L, 0.9 g / L or 0.95 g / L.

[0039] Preferably, the acid dye solution is dyed at a temperature of 90 to 99° C. for 25 to 35 minutes.

[0040] Preferably, the acid dye liquor comprises the following components: a chelating dispersant, an acid leveling agent, sodium sulfate, a pH buffer, an acid dye and water.

[0041] Preferably, the chelating dispersant in the acid dye liquor includes Kunshan Mingjia Sinquest CA-170 and / or Yihua Chemical YH-50.

[0042] Preferably, the acid leveling agent in the acid dye solution includes Hetai Chemical HT-812bs.

[0043] Preferably, the pH buffer in the acid dye solution includes Hetai Chemical HT-315.

[0044] Preferably, the acid dye comprises a 1:2 birefringent metal complex dye.

[0045] Preferably, the acid dye includes any one of DyStar Telon Yellow M-CA, DyStar Telon Red M-CA, DyStar Telon Blue M-CA, NEOLAN Yellow CD-P, NEOLAN Red CD-P, NEOLAN Blue CD-P, DyStar IsoLan Yellow NHF-S, DyStar IsoLan Red NHF-S or DyStar IsoLan Blue NHF-S, or a combination of at least two thereof.

[0046] Preferably, the concentration of the chelating dispersant in the acid dye liquor is 0.5-2 g / L, for example, 0.7 g / L, 0.9 g / L, 1.1 g / L, 1.3 g / L, 1.5 g / L, 1.7 g / L or 1.9 g / L.

[0047] Preferably, the concentration of the acid leveling agent in the acid dye solution is 1-2 g / L, for example, 1.1 g / L, 1.2 g / L, 1.3 g / L, 1.4 g / L, 1.5 g / L, 1.6 g / L, 1.7 g / L, 1.8 g / L or 1.9 g / L.

[0048] Preferably, the concentration of Glauber's salt in the acid dye solution is 2-5 g / L, for example, 2.3 g / L, 2.6 g / L, 2.9 g / L, 3.2 g / L, 3.5 g / L, 3.8 g / L, 4.1 g / L, 4.4 g / L or 4.7 g / L.

[0049] Preferably, the concentration of the pH buffer in the acid dye solution is 0.5-1 g / L, for example, 0.55 g / L, 0.6 g / L, 0.65 g / L, 0.7 g / L, 0.75 g / L, 0.8 g / L, 0.85 g / L, 0.9 g / L or 0.95 g / L.

[0050] Preferably, the mass percentage concentration of the acid dye in the acid dye solution is 0.5% to 3.5%, for example, 0.8%, 1.1%, 1.4%, 1.7%, 2.0%, 2.3%, 2.6%, 2.9% or 3.2%.

[0051] Preferably, the method for preparing the acid dye solution comprises the following steps: heating water to 40-45°C (40.5°C, 41°C, 41.5°C, 42°C, 42.5°C, 43°C, 43.5°C, 44°C or 44.5°C, etc.), and then sequentially adding a chelating dispersant, an acid leveling agent, sodium sulfate, a pH buffer and an acid dye to obtain the acid dye solution.

[0052] Preferably, the bath ratio of the acid dye dyeing is 1:(10-15), for example, 1:10.5, 1:11, 1:11.5, 1:12, 1:12.5, 1:13, 1:13.5, 1:14 or 1:14.5, etc.

[0053] Preferably, the secondary soaping temperature is 70-80°C (for example, 71°C, 72°C, 73°C, 74°C, 75°C, 76°C, 77°C, 78°C or 79°C, etc.), and the time is 20-30 min (for example, 21 min, 22 min, 23 min, 24 min, 25 min, 26 min, 27 min, 28 min or 29 min, etc.).

[0054] Preferably, the soaping working solution of the secondary soaping comprises soaping agent and water.

[0055] Preferably, the soaping agent in the soaping working solution of the secondary soaping comprises acetic acid.

[0056] Preferably, the concentration of the soaping agent in the soaping working solution of the secondary soaping is 2-4 g / L, for example, 2.2 g / L, 2.4 g / L, 2.6 g / L, 2.8 g / L, 3.0 g / L, 3.2 g / L, 3.4 g / L, 3.6 g / L or 3.8 g / L.

[0057] Preferably, the dyeing process specifically comprises the following steps:

[0058] (1) Degrease the multi-component wool fabric with a degreasing working fluid at 75-85°C for 20-30 minutes.

[0059] (2) Dyeing with reactive dye solution: dyeing with reactive dye solution at 60-70° C. for 45-60 min, wherein the pH value of the reactive dye solution is 9.5-10.5.

[0060] (3) Soaping once: Use soaping working solution for soaping once to perform soaping at 75-85°C for 20-30 minutes.

[0061] (4) Dyeing with acid dye solution: dyeing with acid dye solution at 90-99° C. for 25-35 min, wherein the pH of the acid dye solution is 4.5-5.5.

[0062] (5) Secondary soap washing: using a secondary soap washing working solution to soap wash at 70-80° C. for 20-30 min to obtain a dyed fabric.

[0063] In order to ensure the normal operation of the machine during the weaving process, lubricating oil is usually added and remains on the fabric. If color spots and uneven dyeing occur during direct dyeing, the present invention is to fully degrease the multi-component wool fabric before dyeing, select azo active dyes when dyeing with active dyes, control the pH in the range of 9.5 to 10.5, dye Lyocell fiber and wool, in this system, Lyocell fiber has better coloring performance than wool, remove the floating color attached to the fiber by soaping once, improve the fastness, and then dye with acid dyes, select 1:2 birefringent metal complex dyes, control the pH in the range of 4.5 to 5.5, in this system, nylon fiber has higher coloring performance than wool, but wool can dye with azo active dyes and 1:2 birefringent metal complex dyes, so that the dyeing uniformity of wool, nylon fiber and Lyocell fiber can be kept consistent, and finally wash the staining on each fiber by soaping twice to prevent back staining, resulting in color spots. In a second aspect, the present invention provides a dyed fabric, and the dyed fabric is prepared by the dyeing process described in the first aspect.

[0064] In a third aspect, the present invention provides a garment comprising the dyed fabric as described in the second aspect.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] The dyeing process of the multi-component wool fabric of the present invention comprises the steps of degreasing, dyeing with active dye solution, primary soaping, dyeing with acid dye solution and secondary soaping to dye the multi-component wool fabric, thereby solving the problem of poor level dyeing of the multi-component wool fabric. The prepared dyed fabric has good color fastness, stable color light and good same color effect, and the dyeing temperature is low and the damage to the wool is small. DETAILED DESCRIPTION

[0067] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0068] The sources of some components in the following examples and comparative examples are as follows:

[0069] Shrink-resistant wool, commercially available, the same commercial product was used in parallel experiments;

[0070] Compact siro-spun lyocell fiber, commercially available, the same commercial product was used in parallel experiments;

[0071] Bio-based nylon fiber, commercially available, the same commercial product was used in parallel experiments;

[0072] Scouring degreasing agent: brand name is Tissocyl RC9, manufacturer is German Zimmermann Chemical Co., Ltd.

[0073] Chelating dispersant a: brand name is YH-50, manufacturer is Yihua Chemical Co., Ltd.;

[0074] Chelating dispersant b: brand name is Sinquest CA-170, manufacturer is Kunshan Mingjia Additive Co., Ltd.;

[0075] Reactive dyes for cotton a: Azo reactive dyes, brand name KAYACIONYELLOW CF-COM, manufacturer: Huayao Chemical;

[0076] Reactive dyes for cotton b: azo reactive dyes, brand name KAYACION RED CF-COM, manufacturer: Huayao Chemical;

[0077] Reactive dyes for cotton c: azo reactive dyes, brand name KAYACION BLUE CF-COM, manufacturer: Huayao Chemical;

[0078] Soaping agent: The brand is acid soaping agent RC-425A, and the manufacturer is Kunshan Mingjia Additive Co., Ltd.

[0079] Acid leveling agent: brand name is HT-812bs, manufacturer is Hetai Chemical Co., Ltd.;

[0080] pH buffer: brand HT-315, manufacturer: Hetai Chemical Co., Ltd.

[0081] Acid dye a: 1:2 birefringent metal complex dye, brand name DyStar TelonYellow M-CA;

[0082] Acid dye b: 1:2 birefringent metal complex dye, brand name DyStar Telon RedM-CA;

[0083] Acid dye c: 1:2 birefringent metal complex dye, brand name DyStar TelonBlue M-CA.

[0084] Example 1

[0085] This embodiment provides a dyeing process for a multi-component wool fabric and a dyed fabric, wherein the dyeing process specifically comprises the following steps:

[0086] (1) Degreasing the multi-component wool fabric with a degreasing working fluid at 80°C for 25 minutes;

[0087] The multi-component wool fabric comprises the following components by mass percentage: 35% of shrink-proof wool, 55% of compact siro-spun lyocell fiber and 15% of bio-based nylon fiber, and is a weft knitted fabric;

[0088] The degreasing working fluid is composed of a scouring degreasing agent (Tissocyl RC9), soda ash and water, wherein the concentration of the scouring degreasing agent is 2.5 g / L, and the concentration of the soda ash is 1 g / L.

[0089] (2) Dyeing with reactive dye solution: dyeing with reactive dye solution at 60°C for 45 min, with a bath ratio of 1:12;

[0090] The above-mentioned active dye dye solution is prepared by the following method: heating water to 45° C., then adding a chelating dispersant (chelating dispersant a), soda ash, sodium sulfate and active dye for cotton (active dye for cotton a) in sequence and mixing to obtain the active dye dye solution, wherein the concentration of the chelating dispersant is 1 g / L, the concentration of soda ash is 10 g / L, the concentration of sodium sulfate is 50 g / L, the mass percentage concentration of the active dye for cotton is 2%, and the pH is 9.

[0091] (3) Soaping once: Soaping at 75°C for 30 min using the soaping working solution of soaping once;

[0092] The soaping working solution of the above-mentioned primary soaping is composed of a soaping agent (acidic soaping agent RC-425A), acetic acid and water, wherein the concentration of the soaping agent is 3.5 g / L, and the concentration of the acetic acid is 0.3 g / L.

[0093] (4) Acid dye solution dyeing: dyeing with acid dye solution at 95°C for 30 min, with a bath ratio of 1:12;

[0094] The acid dye solution is prepared by the following method: heating water to 45°C, then sequentially adding a chelating dispersant (chelating dispersant b), an acid leveling agent (HT-812bs), sodium sulfate, a pH buffer (HT-315) and an acid dye (acid dye a) to mix to obtain the acid dye solution, wherein the concentration of the chelating dispersant is 1 g / L, the concentration of the acid leveling agent is 1 g / L, the concentration of sodium sulfate is 2.5 g / L, the concentration of the pH buffer is 0.7 g / L, the mass percentage concentration of the acid dye is 2%, and the pH is 5.

[0095] (5) secondary soap washing: using a secondary soap washing working solution to soap wash at 70° C. for 30 min to obtain a dyed fabric;

[0096] The soaping working solution comprises a soaping agent (acetic acid) and water, wherein the concentration of the soaping agent is 3 g / L.

[0097] Example 2

[0098] This embodiment provides a dyeing process for a multi-component wool fabric and a dyed fabric, wherein the dyeing process specifically comprises the following steps:

[0099] (1) Degreasing the multi-component wool fabric with a degreasing working fluid at 75°C for 30 minutes;

[0100] The multi-component wool fabric comprises the following components by mass percentage: 40% of shrink-proof wool, 50% of compact siro-spun lyocell fiber and 10% of bio-based nylon fiber, and is a weft knitted fabric;

[0101] The degreasing working fluid is composed of a scouring degreasing agent (Tissocyl RC9), soda ash and water, wherein the concentration of the scouring degreasing agent is 2 g / L, and the concentration of the soda ash is 2 g / L.

[0102] (2) Dyeing with reactive dye solution: dyeing with reactive dye solution at 65°C for 50 min, with a bath ratio of 1:12;

[0103] The above-mentioned active dye dye solution is prepared by the following method: heating water to 40° C., then adding a chelating dispersant (chelating dispersant a), soda ash, sodium sulfate and active dye for cotton (active dye for cotton b) in sequence and mixing to obtain the active dye dye solution, wherein the concentration of the chelating dispersant is 0.5 g / L, the concentration of soda ash is 8 g / L, the concentration of sodium sulfate is 60 g / L, the mass percentage concentration of the active dye for cotton is 4%, and the pH is 9.5.

[0104] (3) Soaping once: Soaping at 80°C for 25 minutes using the soaping working solution of soaping once;

[0105] The soaping working solution of the above-mentioned primary soaping is composed of a soaping agent (acidic soaping agent RC-425A), acetic acid and water, wherein the concentration of the soaping agent is 4 g / L, and the concentration of the acetic acid is 0.1 g / L.

[0106] (4) Acid dye solution dyeing: dyeing with acid dye solution at 90°C for 35 min, with a bath ratio of 1:12;

[0107] The acid dye solution is prepared by the following method: heating water to 40°C, then sequentially adding a chelating dispersant (chelating dispersant b), an acid leveling agent (HT-812bs), sodium sulfate, a pH buffer (HT-315) and an acid dye (acid dye b) to mix, to obtain the acid dye solution, wherein the concentration of the chelating dispersant is 0.5 g / L, the concentration of the acid leveling agent is 2 g / L, the concentration of sodium sulfate is 2 g / L, the concentration of the pH buffer is 1 g / L, the mass percentage concentration of the acid dye is 3.5%, and the pH is 4.5.

[0108] (5) secondary soap washing: using a secondary soap washing working solution to soap wash at 75° C. for 25 min to obtain a dyed fabric;

[0109] The soaping working solution of the secondary soaping comprises a soaping agent (acetic acid) and water, wherein the concentration of the soaping agent is 2 g / L.

[0110] Example 3

[0111] This embodiment provides a dyeing process for a multi-component wool fabric and a dyed fabric, wherein the dyeing process specifically comprises the following steps:

[0112] (1) Degreasing the multi-component wool fabric with a degreasing working fluid at 85°C for 20 minutes;

[0113] The multi-component wool fabric comprises the following components by mass percentage: 30% of shrink-proof wool, 60% of compact siro-spun lyocell fiber and 10% of bio-based nylon fiber, and is a weft knitted fabric;

[0114] The degreasing working fluid is composed of a scouring degreasing agent (Tissocyl RC9), soda ash and water, wherein the concentration of the scouring degreasing agent is 3 g / L and the concentration of the soda ash is 0.5 g / L.

[0115] (2) Dyeing with reactive dye solution: dyeing with reactive dye solution at 70°C for 45 min, with a bath ratio of 1:12;

[0116] The above-mentioned active dye dye solution is prepared by the following method: heating water to 40°C, then adding a chelating dispersant (chelating dispersant a), soda ash, sodium sulfate and active dye for cotton (active dye for cotton c) in sequence and mixing to obtain the active dye dye solution, wherein the concentration of the chelating dispersant is 2g / L, the concentration of soda ash is 12g / L, the concentration of sodium sulfate is 40g / L, the mass percentage concentration of the active dye for cotton is 1g / L, and the pH is 10.5.

[0117] (3) Soaping once: Soaping at 85°C for 20 min using the soaping working solution of soaping once;

[0118] The soaping working solution of the above-mentioned primary soaping is composed of a soaping agent (acidic soaping agent RC-425A), acetic acid and water, wherein the concentration of the soaping agent is 3 g / L, and the concentration of the acetic acid is 0.5 g / L.

[0119] (4) Acid dye solution dyeing: dyeing with acid dye solution at 99°C for 25 min, with a bath ratio of 1:12;

[0120] The acid dye solution is prepared by the following method: heating water to 40°C, then sequentially adding a chelating dispersant (chelating dispersant b), an acid leveling agent (HT-812bs), sodium sulfate, a pH buffer (HT-315) and an acid dye (acid dye c) to obtain the acid dye solution, wherein the concentration of the chelating dispersant is 2 g / L, the concentration of the acid leveling agent is 0.5 g / L, the concentration of sodium sulfate is 5 g / L, the concentration of the pH buffer is 0.5 g / L, the mass percentage concentration of the acid dye is 0.5%, and the pH is 5.5.

[0121] (5) secondary soap washing: using a secondary soap washing working solution to soap wash at 80° C. for 20 min to obtain a dyed fabric;

[0122] The soaping working solution of the secondary soaping comprises a soaping agent (acetic acid) and water, wherein the concentration of the soaping agent is 4 g / L.

[0123] Example 4

[0124] This embodiment provides a dyeing process for a multi-component wool fabric and a dyed fabric, which is different from Embodiment 1 only in that the concentration of sodium sulfate in the reactive dye solution is adjusted to 35 g / L, and other conditions are the same as those in Embodiment 1.

[0125] Example 5

[0126] This embodiment provides a dyeing process for a multi-component wool fabric and a dyed fabric, which is different from Embodiment 1 only in that the concentration of sodium sulfate in the reactive dye solution is adjusted to 65 g / L, and other conditions are the same as those in Embodiment 1.

[0127] Comparative Example 1

[0128] This comparative example provides a dyeing process for a multi-component wool fabric and a dyed fabric, which differs from Example 1 only in that the concentration of the pH buffer in the acid dye solution is adjusted to 0.4 g / L and the pH is 6.0, and other conditions are the same as those in Example 1.

[0129] Comparative Example 2

[0130] This comparative example provides a dyeing process for a multi-component wool fabric and a dyed fabric, which is different from Example 1 only in that the concentration of soda ash in the reactive dye solution is adjusted to 4 g / L and the pH is 9.3, and other conditions are the same as those in Example 1.

[0131] Comparative Example 3

[0132] This comparative example provides a dyeing process for a multi-component wool fabric and a dyed fabric, which is different from Example 1 only in that a degreasing step is not included, and other conditions are the same as those of Example 1.

[0133] Comparative Example 4

[0134] This comparative example provides a dyeing process for a multi-component wool fabric and a dyed fabric, which is different from Example 1 only in that the step of dyeing with reactive dyes is not included, and other conditions are the same as those in Example 1.

[0135] Comparative Example 5

[0136] This comparative example provides a dyeing process for a multi-component wool fabric and a dyed fabric, which is different from Example 1 only in that the step of dyeing with an acid dye is not included, and other conditions are the same as those in Example 1.

[0137] The dyeing fabrics provided in the above embodiments and comparative examples were tested for level dyeing as follows:

[0138] (1) Dyeing homogeneity: Visually observe the color difference on the surface of the dyed fabric. If there is no obvious color difference, it is considered that the dyeing homogeneity is good; if there is a slight color difference, it is considered that the dyeing homogeneity is good; if there is an obvious color difference, it is considered that the dyeing homogeneity is poor.

[0139] (2) Color difference detection method: Datacolor spectrophotometer is used for color measurement and evaluation. The color of the dyed fabric is measured at the left, middle and right positions respectively to obtain the average value ΔE. 0≤ΔE≤0.4 is considered excellent, 0.4<ΔE≤0.8 is considered good, 0.8<ΔE≤1.2 is considered medium, and 1.2<ΔE is considered poor.

[0140] The results are shown in Table 1 below:

[0141] Table 1

[0142]

[0143]

[0144] It can be seen from the contents of Table 1 that the dyed fabrics prepared in Examples 1 to 5 have relatively good dyeing homogeneity, low ΔE values, and good dyeing uniformity.

[0145] Compared with Example 1, if the concentration of sodium sulfate in the reactive dye solution is too low (Example 4) or too high (Example 5), the prepared dyed fabric has a slight color difference and ΔE increases. It can be seen that in the present invention, the concentration of sodium sulfate in the reactive dye solution is controlled within a specific range, and the prepared dyed fabric has better levelness.

[0146] Compared with Example 1, if the pH of the acid dye solution is too high (Comparative Example 1), the prepared dyed fabric has a slight color difference and ΔE increases; if the pH of the reactive dye solution is too high (Comparative Example 2), the prepared dyed fabric has a slight color difference and ΔE increases. It can be seen that in the present invention, the pH of the reactive dye solution is controlled within a specific range, and the prepared dyed fabric has better level dyeing properties.

[0147] Compared with Example 1, if the dyeing process does not include degreasing (Comparative Example 3), the prepared dyed fabric has obvious color difference and ΔE increases.

[0148] Compared with Example 1, if the dyeing process does not include reactive dyeing (Comparative Example 4), the prepared dyed fabric has obvious color difference and ΔE increases.

[0149] Compared with Example 1, if the dyeing process does not include dyeing with acid dyes (Comparative Example 5), the prepared dyed fabric has obvious color difference and ΔE increases.

[0150] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate the dyeing process of a multi-component wool fabric, the dyed fabric and its application, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A dyeing process for multi-component wool fabric, characterized in that: The dyeing process comprises the following steps: degreasing the multi-component wool fabric, dyeing with a reactive dye solution, soaping once, dyeing with an acid dye solution, and soaping twice to obtain a dyed fabric; The pH of the reactive dye solution is 9.5-10.5, and the pH of the acid dye solution is 4.5-5.

5.

2. The dyeing process according to claim 1, characterized in that: The multi-component wool fabric comprises the following components by mass percentage: 30% to 40% wool, 50% to 60% lyocell fiber and 10% to 20% nylon fiber; Preferably, the wool is shrink-proof wool; Preferably, the lyocell fiber is a compact siro-spun lyocell fiber; Preferably, the nylon fiber is a bio-based nylon fiber; Preferably, the multi-component wool fabric is a weft knitted fabric.

3. The dyeing process according to claim 1 or 2, characterized in that: The degreasing temperature is 75-85°C and the time is 20-30 minutes; Preferably, the degreasing working fluid in the degreasing process comprises the following components: a refined degreasing agent, soda ash and water; Preferably, the concentration of the scouring deoiling agent in the deoiling working solution is 2 to 3 g / L; Preferably, the concentration of soda ash in the degreasing working solution is 0.5-2 g / L.

4. The dyeing process according to any one of claims 1 to 3, characterized in that: The temperature of the reactive dye solution for dyeing is 60-70°C and the dyeing time is 45-60 minutes; Preferably, the reactive dye liquor comprises the following components: chelating dispersant, soda ash, sodium sulfate, reactive dye for cotton and water; Preferably, the reactive dye for cotton includes azo reactive dyes; Preferably, the concentration of the chelating dispersant in the reactive dye liquor is 0.5 to 2 g / L; Preferably, the concentration of soda ash in the reactive dye solution is 8 to 12 g / L; Preferably, the concentration of mirabilite in the reactive dye solution is 40-60 g / L; Preferably, the mass percentage concentration of the reactive dye for cotton in the reactive dye solution is 0.5% to 4%; Preferably, the method for preparing the reactive dye solution comprises the following steps: heating water to 40-45° C., and then sequentially adding a chelating dispersant, soda ash, sodium sulfate and reactive dye for cotton to obtain the reactive dye solution; Preferably, the bath ratio of the reactive dye dyeing is 1:(10-15).

5. The dyeing process according to any one of claims 1 to 4, characterized in that: The temperature of the soap washing is 75-85°C and the time is 20-30 minutes; Preferably, the soaping working solution of the primary soaping comprises soaping agent, acetic acid and water; Preferably, the concentration of the soaping agent in the soaping working solution of the first soaping is 3 to 4 g / L; Preferably, the concentration of acetic acid in the soaping working solution of the first soaping is 0.1-0.5 g / L.

6. The dyeing process according to any one of claims 1 to 5, characterized in that: The acid dye solution is dyed at a temperature of 90 to 99°C for 25 to 35 minutes; Preferably, the acid dye liquor comprises the following components: a chelating dispersant, an acid leveling agent, sodium sulfate, a pH buffer, an acid dye and water; Preferably, the acid dye comprises a 1:2 birefringent metal complex dye; Preferably, the concentration of the chelating dispersant in the acid dye liquor is 0.5 to 2 g / L; Preferably, the concentration of the acid leveling agent in the acid dye solution is 1 to 2 g / L; Preferably, the concentration of Glauber's salt in the acid dye solution is 2 to 5 g / L; Preferably, the concentration of the pH buffer in the acid dye solution is 0.5 to 1 g / L; Preferably, the mass percentage concentration of the acid dye in the acid dye solution is 0.5% to 3.5%; Preferably, the method for preparing the acid dye solution comprises the following steps: heating water to 40-45° C., and then sequentially adding a chelating dispersant, an acid leveling agent, sodium sulfate, a pH buffer and an acid dye to obtain the acid dye solution; Preferably, the bath ratio of the acid dye is 1:(10-15).

7. The dyeing process according to any one of claims 1 to 6, characterized in that: The secondary soap washing temperature is 70-80°C and the time is 20-30min; Preferably, the soaping working solution of the secondary soaping comprises a soaping agent and water; Preferably, the soaping agent in the soaping working solution of the secondary soaping comprises acetic acid; Preferably, the concentration of the soaping agent in the soaping working solution of the secondary soaping is 2-4 g / L.

8. The dyeing process according to any one of claims 1 to 7, characterized in that: The dyeing process specifically comprises the following steps: (1) Degreasing the multi-component wool fabric with a degreasing working fluid at 75-85° C. for 20-30 minutes; (2) dyeing with a reactive dye solution: dyeing with a reactive dye solution at 60 to 70° C. for 45 to 60 minutes, wherein the pH of the reactive dye solution is 9.5 to 10.5; (3) Soaping once: Soaping at 75-85°C for 20-30 minutes using a soaping working solution for soaping once; (4) Dyeing with an acid dye solution: dyeing with an acid dye solution at 90 to 99° C. for 25 to 35 minutes, wherein the pH of the acid dye solution is 4.5 to 5.5; (5) Secondary soap washing: using a secondary soap washing working solution to soap wash at 70-80° C. for 20-30 min to obtain a dyed fabric.

9. A dyed fabric, characterized in that: The dyed fabric is prepared by the dyeing process according to any one of claims 1 to 8.

10. A garment, characterized in that: The garment comprises the dyed fabric according to claim 9.

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