Jig dyeing process for preventing fibrillation of lyocell woven fabric

Abstract

The invention discloses a jig dyeing process for preventing fibrillation of a lyocell woven fabric. The method comprises the following steps: singeing, desizing and bleaching lyocell grey cloth; preparing a dyeing working solution which comprises a dye, an anti-wrinkle agent, anhydrous sodium sulphate and sodium carbonate, uniformly mixing the working solution, and carrying out first-step jig dyeing on the pretreated lyocell fabric; preparing an anti-fibrillation working solution which comprises an anti-fibrillation cross-linking agent, a leveling agent and a dispersing agent, stirring the solutions at a high speed to prepare a stable suspension, adding the stable suspension into the dyeing working solution, and starting second jig dyeing after heating; and carrying out water washing, soaping, softening and drying on the treated lyocell woven fabric. The jig dyeing process is suitable for continuous long vehicle production of the lyocell woven fabric and the blended fabric of the lyocell woven fabric, through the one-bath two-step dyeing process, the effect of preventing fibrillation can be achieved, meanwhile, the utilization rate of the dye can be increased, the risk that the lyocell woven fabric is slightly dyed and dyed excessively is avoided, and the jig dyeing process has a very large application prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of textile production and processing, and particularly relates to a jig-dyeing process for preventing lyocell woven fabrics from fibrillation. Background Art

[0002] Lyocell woven fabrics have the advantages of high strength, thick hand feel, good drape, good moisture absorption, bright colors, good wrinkle resistance, etc., and can be blended, compounded, and interwoven with other fibers to obtain fabrics with a smooth surface style. However, Lyocell fibers have unique fibrillation characteristics, that is, due to fiber swelling and mechanical external force in a wet state, the original single fiber splits axially, splitting into fine fibrils, resulting in problems such as light color or "frost" or white lines or scratches on the fabric. Lyocell woven fabric dyeing usually adopts an open-width continuous processing technology. Under the conditions of wet heat, alkalinity and mechanical friction, the lateral swelling of the fiber makes the stiff fabric more easily fibrillated, thus leading to serious fabric quality problems.

[0003] At present, the problem of fibrillation of Lyocell woven fabrics is mainly solved by treating the woven fabrics through cold pad-batch dyeing process, pad-dyeing steaming process or pad-dyeing baking process. Patent CN 115772811A obtains Lyocell fabrics that can prevent fibrillation through cold pad-batch dyeing process, but the process is relatively cumbersome and requires repeated baking of the fabrics, which consumes a lot of energy. In addition, the temperature of the cold pile is low, which can easily lead to incomplete reaction of the cross-linking agent. Patent CN 117364512A discloses an anti-fibrillation treatment process for Lyocell dyed fabrics. This process is not for finishing from grey cloth, but only for repairing colored cloth. In addition, the anti-fibrillation treatment process of this process is all impregnation treatment, which belongs to static treatment process and is not suitable for continuous production requirements of large-scale production.

[0004] At present, the fibrillation problem of Lyocell woven fabrics in the dyeing and finishing process causes abrasions and white frost on the fabric. This is an industry problem that urgently needs to be solved. It is also a difficulty in improving the quality of Lyocell woven fabrics. Therefore, it is urgent to develop a Lyocell fabric anti-fibrillation roller dyeing process that is suitable for continuous production, does not add additional processes, and is simple to operate. Summary of the invention

[0005] The invention aims to provide a jig-dyeing process for preventing the fibrillation of Lyocell woven fabrics due to the mechanical external force or friction in a wet state. The method reduces the scratches caused to the Lyocell woven fabrics during the dyeing and finishing process and is suitable for continuous production. The method not only does not affect the coloring of the dye, but also can obtain Lyocell woven fabrics with excellent anti-fibrillation performance, does not increase the extra equipment cost, and is energy-saving and environmentally friendly.

[0006] The jig-dyeing process for preventing the fibrillation of lyocell woven fabrics provided by the present invention comprises the following steps: (1) Singeing, desizing and bleaching the Lyocell fabric; (2) preparing a dyeing working solution, wherein the dyeing working solution comprises a dye, an anti-wrinkle agent, sodium sulfate and soda ash, and mixing the dyeing working solution evenly. After the working solution is heated to a certain temperature, performing the first step of jig dyeing on the lyocell fabric treated in step (1); (3) preparing an anti-fibrillation working solution, wherein the anti-fibrillation working solution comprises an anti-fibrillation cross-linking agent, a leveling agent and a dispersant, stirring the anti-fibrillation working solution at a high speed to obtain a stable suspension, adding the dyeing working solution of step (2) to perform the second step of jig dyeing; (4) Wash, soap, soften and dry the treated Lyocell fabric.

[0007] In step (1) of the above method, the singeing is to remove the fluff on the cloth surface by through-singing, the process conditions are two positive and two negative, the speed is 100m / min, and the temperature is 1000-1100℃; The desizing and bleaching process in step (1) adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water and mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature. Among them, the dosage of amylase is 5-10g / L (amylase activity 4000U / ml), penetrant 1-5g / L, alkali (NaOH) dosage 6-10g / L, hydrogen peroxide 4-5g / L, refining agent 5-6g / L, oxygen bleaching stabilizer 4-5g / L, dispersing chelating agent 1-2g / L, the cold stacking condition is room temperature stacking, and the stacking time is 16-20h.

[0008] In step (2), the dye is one or more of s-triazine type reactive dyes, vinyl sulfone type reactive dyes, and halogenated pyrimidine type reactive dyes; The anti-wrinkle agent is one or more of urea-formaldehyde resin, dimethylolethylene urea resin, dimethylol dihydroxyethylene urea resin, high polymer chitosan, waterborne polyurethane resin, epoxy compound, citric acid, and polymaleic acid; The dyeing working solution is prepared by adding dye, anti-wrinkle agent, sodium sulfate and soda ash into water and mixing them evenly, wherein the amount of dye is 5-20g / L; the amount of anti-wrinkle agent is 1-2g / L; the amount of sodium sulfate is 40-60g / L, and the amount of soda ash is 15-20g / L; In step (2), the first step of jig dyeing process conditions is to gradually add the dyeing working solution in four times, adding 1 / 4 of the dye solution each time, the dyeing temperature is 60-80°C, and the dyeing time is 15-20min.

[0009] In step (3), the anti-fibrillation cross-linking agent is one or more of a dichlorotriazine compound, a dibromotriazine compound, and 1,3,5-triacryloylhexahydro-1,3,5-triazine, and the amount used is 30-80 g / L; The leveling agent is one or more of fatty alkyl sulfate, alkylbenzene sulfonate, polyethylene glycol alkyl ether sulfate, naphthalenesulfonic acid-formaldehyde condensate, polyethylene glycol ether of fatty amine, polyethylene polyamine, oxyethylated nitrogen-containing fatty alkyl compound, and the dosage is 1-5 g / L; The dispersant is one or more of alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, fatty alcohol polyoxyethylene ether sodium carboxylate, isomeric alcohol polyoxyethylene ether, and the dosage is 3-5g / L; In step (3), the process for preparing the anti-fibrillation working liquid is to add the anti-fibrillation crosslinking agent, the leveling agent, and the dispersant into water according to the added amount, mix them evenly, and stir them in a high-speed stirrer for 1-2 hours to obtain a stable suspension, wherein the stirrer speed is 2000-5000 r / min; In step (3), the second jig dyeing process conditions are a dyeing temperature of 60-80°C and a dyeing time of 45-60 minutes.

[0010] In step (4), the soaping agent is a mixture of aralkyl polyglycol ester and fatty acid amine, the soaping temperature is 95-100°C, the soaping time is 20-30 minutes, the drying temperature is 110-120°C, and the drying time is 1-2 minutes.

[0011] The jig dyeing process is suitable for Lyocell woven fabrics and blended fabrics with other fabrics.

[0012] The Lyocell woven fabric produced by the above process and its blended fabric with other fabrics also fall within the protection scope of the present invention.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses an enzyme cold pad-batch desizing and bleaching one-step process to treat Lyocell woven fabric, which shortens the pre-treatment process flow, reduces the friction time between the fabric and the equipment, and reduces the risk of fibrillation.

[0014] (2) The present invention adopts a one-bath two-step jig dyeing process to carry out an anti-fibrillation treatment on Lyocell woven fabrics, which does not increase the investment in additional equipment, is simple in process and easy to operate; in addition, the one-bath two-step jig dyeing process is used to separate the time before and after the dyeing working solution and the anti-fibrillation working solution act on the woven fabric, so that a part of the dye is first subjected to stage dyeing and then subjected to the anti-fibrillation treatment, which can improve the utilization rate of the dye, ensure the dye uptake rate, reduce the competitive dyeing effect between the cross-linking agent and the dye, and thus avoid the risk of light dyeing of the fabric.

[0015] (3) The present invention prepares a dyeing working solution and adds an anti-wrinkle agent to the dyeing working solution, thereby preventing the Lyocell woven fabric from becoming hard after contact with water and becoming prone to fibrillation due to friction between equipment; at the same time, when preparing the anti-fibrillation working solution, a leveling agent and a dispersant are added, and high-speed dispersion is performed to obtain a uniform suspension, thereby ensuring the stability of the entire dyeing and finishing liquid and avoiding the dyeing phenomenon and color difference of the front and back of the fabric that occur in the production of Lyocell woven fabrics in long-roll dyeing machines.

[0016] (4) The jig-dyeing process of the present invention is suitable for the continuous production of anti-fibrillation of lyocell fabrics in factories. The anti-fibrillation effect of the treated fabric is good and the washability is good. No fibrillation phenomenon occurs after washing 10 times. Meanwhile, no formaldehyde is released during the finishing process, thus avoiding harm to human body and environment. The present invention has a great application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The surface of the lyocell fabric of Example 1 after washing 10 times (magnification 1600 times under a microscope).

[0018] Figure 2 The surface of the Lyocell fabric of Comparative Example 1 after washing 10 times (microscope magnification 1600 times).

[0019] Figure 3 The surface of the Lyocell fabric of Comparative Example 2 after washing 10 times (microscope magnification 1600 times).

[0020] Figure 4 This is a comparison of the white frost on the surface of the lyocell fabric prepared in Example 1 before and after washing, a is before washing, and b is after washing.

[0021] Figure 5 This is a comparison of the white frost on the surface of the lyocell fabric prepared in Example 2 before and after washing, a is before washing, and b is after washing.

[0022] Figure 6 This is a comparison of the white frost on the surface of the lyocell fabric prepared in Example 3 before and after washing, a is before washing, and b is after washing.

[0023] Figure 7This is a comparison of the white frost on the surface of the lyocell fabric prepared in Example 4 before and after washing, a is before washing, and b is after washing.

[0024] Figure 8 This is a comparison of the white frost on the surface of the lyocell fabric prepared in Example 5 before and after washing, a is before washing, and b is after washing.

[0025] Fig. 9 This is a comparison of the white frost on the surface of the Lyocell fabric prepared in Comparative Example 1 before and after washing, where a is before washing and b is after washing.

[0026] Fig.10 This is a comparison of the white frost on the surface of the Lyocell fabric prepared in Comparative Example 2 before and after washing, where a is before washing and b is after washing. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with specific embodiments, and the examples provided are only for illustrating the present invention, rather than for limiting the scope of the present invention. The examples provided below can be used as a guide for further improvements by those of ordinary skill in the art, and do not constitute a limitation of the present invention in any way.

[0028] The experimental methods in the following examples, unless otherwise specified, are all conventional methods, and are performed according to the techniques or conditions described in the literature in the field or according to the product instructions. The materials, reagents, etc. used in the following examples, unless otherwise specified, can all be obtained from commercial channels.

[0029] In the desizing and bleaching process in the following examples and comparative examples, the amylase was purchased from Novozymes amylase 2D-BG, the penetrant was purchased from Beijing Zhongfang Chemical Co., Ltd. FK-ST20, the refining agent was FK-ST1218H, the oxygen bleaching stabilizer was FK-601, and the dispersing chelating agent was FK-422.

[0030] The anti-wrinkle agents are products purchased from Zibo Lurui Fine Chemical Company, AC-L and LUK.

[0031] The anti-fibrillation crosslinking agents were purchased from Beijing Zhongfang Chemical Co., Ltd., CB-3 and CB-4, and the product of Nantong Jiangtian Chemical Co., Ltd. was 1,3,5-triacryloylhexahydro-1,3,5-triazine (TAHT).

[0032] The leveling agent was FK-482 purchased from Beijing Zhongfang Chemical Co., Ltd. and LA-RK purchased from Zibo Lurui Fine Chemical Co., Ltd.

[0033] The dispersants were purchased from Hangzhou Kecheng Chemical Co., Ltd., JFC-4, AH-30.

[0034] The soaping agent was FK-9500 purchased from Beijing Zhongfang Chemical Co., Ltd.

[0035] Example 1 The jigger dyeing process to prevent fibrillation of Lyocell woven fabrics includes the following steps: (1) Singeing the Lyocell grey cloth, wherein the lint on the cloth surface is removed by a through-singing method, and the process conditions are two positive and two negative, a vehicle speed of 100 m / min, and a temperature of 1000° C.; the desizing and bleaching process adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water, mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature; Among them, the dosage of amylase 2D-BG is 5g / L (4000U / ml), the dosage of penetrant FK-ST20 is 2g / L, the dosage of NaOH is 10g / L, the dosage of hydrogen peroxide is 5g / L, the dosage of refining agent FK-ST1218H is 5g / L, the dosage of oxygen bleaching stabilizer FK-601 is 5g / L, the dosage of dispersing chelating agent FK-422 is 2g / L, the cold stacking condition is room temperature stacking, and the stacking time is 20h.

[0036] (2) preparing a dyeing working solution, which includes a dye, an anti-wrinkle agent, sodium sulfate and soda ash, mixing the above working solutions evenly, and subjecting the lyocell fabric treated in step (1) to the first step of jig dyeing; the dye is a triazine type reactive dye black B, the amount of which is 5 g / L, the amount of sodium sulfate is 60 g / L, and the amount of soda ash is 15 g / L; the anti-wrinkle agent is AC-L, the amount of which is 2 g / L; The dyeing working solution was gradually added in four times, with 1 / 4 of the dyeing working solution added each time. The dyeing temperature was 60°C and the dyeing time was 15 minutes (the first step of roll dyeing was 15 minutes).

[0037] (3) preparing an anti-fibrillation working solution, wherein the anti-fibrillation crosslinking agent is CB-3, the dosage is 40 g / L; the leveling agent is FK-482, the dosage is 2 g / L; the dispersant is JFC-4, the dosage is 3 g / L, the anti-fibrillation crosslinking agent, the leveling agent and the dispersant are mixed evenly according to the added amounts, stirred in a high-speed stirrer for 1 hour, the stirrer speed is 2000 r / min, to prepare a stable suspension, the dyeing working solution of step (2) is added, and the second step of roller dyeing is started; the process conditions of the second step of roller dyeing are dyeing temperature of 60°C and dyeing time of 60 min.

[0038] (4) The treated lyocell fabric was washed, soaped, softened and dried. The soaping agent was FK-9500, the soaping temperature was 95° C., the soaping time was 30 min, the drying temperature was 110° C., and the drying time was 1 min.

[0039] Example 2 The jigger dyeing process to prevent fibrillation of Lyocell woven fabrics includes the following steps: (1) Singeing the Lyocell grey cloth, wherein the lint on the cloth surface is removed by a through-singing method, and the process conditions are two positive and two negative, a vehicle speed of 100 m / min, and a temperature of 1000° C.; the desizing and bleaching process adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water, mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature; Among them, the dosage of amylase 2D-BG is 5g / L (4000U / ml), the dosage of penetrant FK-ST20 is 2g / L, the dosage of NaOH is 10g / L, the dosage of hydrogen peroxide is 5g / L, the dosage of refining agent FK-ST1218H is 5g / L, the dosage of oxygen bleaching stabilizer FK-601 is 5g / L, the dosage of dispersing chelating agent FK-422 is 2g / L, the cold stacking condition is room temperature stacking, and the stacking time is 20h.

[0040] (2) preparing a dyeing working solution, which includes a dye, an anti-wrinkle agent, sodium sulfate and soda ash, mixing the above working solutions evenly, and subjecting the lyocell fabric treated in step (1) to first-step jig dyeing; the dye is a triazine-type reactive dye black B, the amount of which is 5 g / L, the amount of sodium sulfate is 60 g / L, and the amount of soda ash is 15 g / L; the anti-wrinkle agent is LUK, the amount of which is 2 g / L; The dyeing working solution was gradually added in four times, with 1 / 4 of the dyeing working solution added each time. The dyeing temperature was 60°C and the dyeing time was 15 minutes.

[0041] (3) preparing an anti-fibrillation working solution, wherein the anti-fibrillation crosslinking agent is CB-4, the dosage is 40 g / L; the leveling agent is LA-RK, the dosage is 2 g / L; the dispersant is AH-30, the dosage is 3 g / L, the anti-fibrillation crosslinking agent, the leveling agent and the dispersant are mixed evenly according to the added amounts, stirred in a high-speed stirrer for 1 hour, the stirrer speed is 2000 r / min, to prepare a stable suspension, the dyeing working solution of step (2) is added, and the second step of roller dyeing is started; the process conditions of the second step of roller dyeing are dyeing temperature of 60°C and dyeing time of 60 min.

[0042] (4) The treated lyocell fabric was washed, soaped, softened and dried. The soaping agent was FK-9500, the soaping temperature was 95° C., the soaping time was 30 min, the drying temperature was 110° C., and the drying time was 1 min.

[0043] Example 3 The jigger dyeing process to prevent fibrillation of Lyocell woven fabrics includes the following steps: (1) Singeing the Lyocell grey cloth, wherein the lint on the cloth surface is removed by a through-singing method, and the process conditions are two positive and two negative, a vehicle speed of 100 m / min, and a temperature of 1000° C.; the desizing and bleaching process adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water, mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature; Among them, the dosage of amylase 2D-BG is 5g / L (4000U / ml), the dosage of penetrant FK-ST20 is 2g / L, the dosage of NaOH is 10g / L, the dosage of hydrogen peroxide is 5g / L, the dosage of refining agent FK-ST1218H is 5g / L, the dosage of oxygen bleaching stabilizer FK-601 is 5g / L, the dosage of dispersing chelating agent FK-422 is 2g / L, the cold stacking condition is room temperature stacking, and the stacking time is 20h.

[0044] (2) preparing a dyeing working solution, which includes a dye, an anti-wrinkle agent, sodium sulfate and soda ash, mixing the above working solutions evenly, and subjecting the lyocell fabric treated in step (1) to first-step jig dyeing; the dye is a triazine-type reactive dye black B, the amount of which is 5 g / L, the amount of sodium sulfate is 60 g / L, and the amount of soda ash is 15 g / L; the anti-wrinkle agent is LUK, the amount of which is 2 g / L; The dyeing working solution was gradually added in four times, with 1 / 4 of the dyeing working solution added each time. The dyeing temperature was 60°C and the dyeing time was 15 minutes.

[0045] (3) preparing an anti-fibrillation working solution, wherein the anti-fibrillation crosslinking agent is TAHT, the dosage is 40 g / L; the leveling agent is LA-RK, the dosage is 2 g / L; the dispersant is AH-30, the dosage is 3 g / L, the anti-fibrillation crosslinking agent, the leveling agent and the dispersant are mixed evenly according to the added amounts, stirred in a high-speed stirrer for 1 hour, the stirrer speed is 2000 r / min, to prepare a stable suspension, the dyeing working solution of step (2) is added, and the second step of roller dyeing is started; the process conditions of the second step of roller dyeing are dyeing temperature of 60°C and dyeing time of 60 min.

[0046] (4) The treated lyocell fabric was washed, soaped, softened and dried. The soaping agent was FK-9500, the soaping temperature was 95° C., the soaping time was 30 min, the drying temperature was 110° C., and the drying time was 1 min.

[0047] Example 4 The jigger dyeing process to prevent fibrillation of Lyocell woven fabrics includes the following steps: (1) Singeing the Lyocell grey cloth, wherein the lint on the cloth surface is removed by a through-singing method, and the process conditions are two positive and two negative, a vehicle speed of 100 m / min, and a temperature of 1000° C.; the desizing and bleaching process adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water, mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature; Among them, the dosage of amylase 2D-BG is 5g / L (4000U / ml), the dosage of penetrant FK-ST20 is 2g / L, the dosage of NaOH is 10g / L, the dosage of hydrogen peroxide is 5g / L, the dosage of refining agent FK-ST1218H is 5g / L, the dosage of oxygen bleaching stabilizer FK-601 is 5g / L, the dosage of dispersing chelating agent FK-422 is 2g / L, the cold stacking condition is room temperature stacking, and the stacking time is 20h.

[0048] (2) preparing a dyeing working solution, which includes a dye, an anti-wrinkle agent, sodium sulfate and soda ash, mixing the above working solutions evenly, and subjecting the lyocell fabric treated in step (1) to the first step of jig dyeing; the dye is a triazine type reactive dye black B, the amount of which is 5 g / L, the amount of sodium sulfate is 60 g / L, and the amount of soda ash is 15 g / L; the anti-wrinkle agent is LUK, the amount of which is 2 g / L; The dyeing working solution was gradually added in four times, with 1 / 4 of the dyeing working solution added each time. The dyeing temperature was 60°C and the dyeing time was 15 minutes.

[0049] (3) preparing an anti-fibrillation working solution, wherein the anti-fibrillation crosslinking agents are CB-3 and CB-4, with the dosage being 20 g / L respectively; the leveling agent is LA-RK, with the dosage being 2 g / L; and the dispersant is AH-30, with the dosage being 3 g / L. The anti-fibrillation crosslinking agent, the leveling agent and the dispersant are mixed evenly according to the added amounts, stirred in a high-speed stirrer for 1 h at a stirrer speed of 2000 r / min to prepare a stable suspension, and the dyeing working solution of step (2) is added to start the second step of roller dyeing; the process conditions of the second step of roller dyeing are a dyeing temperature of 60°C and a dyeing time of 60 min.

[0050] (4) The treated lyocell fabric was washed, soaped, softened and dried. The soaping agent was FK-9500, the soaping temperature was 95° C., the soaping time was 30 min, the drying temperature was 110° C., and the drying time was 1 min.

[0051] Example 5 The jigger dyeing process to prevent fibrillation of Lyocell woven fabrics includes the following steps: (1) Singeing the Lyocell grey cloth, wherein the lint on the cloth surface is removed by a through-singing method, and the process conditions are two positive and two negative, a vehicle speed of 100 m / min, and a temperature of 1000° C.; the desizing and bleaching process adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water, mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature; Among them, the dosage of amylase 2D-BG is 5g / L (4000U / ml), the dosage of penetrant FK-ST20 is 2g / L, the dosage of NaOH is 10g / L, the dosage of hydrogen peroxide is 5g / L, the dosage of refining agent FK-ST1218H is 5g / L, the dosage of oxygen bleaching stabilizer FK-601 is 5g / L, the dosage of dispersing chelating agent FK-422 is 2g / L, the cold stacking condition is room temperature stacking, and the stacking time is 20h.

[0052] (2) preparing a dyeing working solution, which includes a dye, an anti-wrinkle agent, sodium sulfate and soda ash, mixing the above working solutions evenly, and subjecting the lyocell fabric treated in step (1) to the first step of jig dyeing; the dye is a triazine type reactive dye black B, the amount of which is 5 g / L, the amount of sodium sulfate is 60 g / L, and the amount of soda ash is 15 g / L; the anti-wrinkle agent is LUK, the amount of which is 2 g / L; The dyeing working solution was gradually added in four times, with 1 / 4 of the dyeing working solution added each time. The dyeing temperature was 80°C and the dyeing time was 15 minutes.

[0053] (3) preparing an anti-fibrillation working solution, wherein the anti-fibrillation crosslinking agent is CB-4, the dosage is 40 g / L; the leveling agent is LA-RK, the dosage is 2 g / L; the dispersant is AH-30, the dosage is 3 g / L, the anti-fibrillation crosslinking agent, the leveling agent and the dispersant are mixed evenly according to the added amounts, stirred in a high-speed stirrer for 1 hour, the stirrer speed is 2000 r / min, to prepare a stable suspension, the dyeing working solution of step (2) is added, and the second step of roller dyeing is started; the process conditions of the second roller dyeing are dyeing temperature 80°C and dyeing time 60 min.

[0054] (4) The treated lyocell fabric was washed, soaped, softened and dried. The soaping agent was FK-9500, the soaping temperature was 95° C., the soaping time was 30 min, the drying temperature was 110° C., and the drying time was 1 min.

[0055] Comparative Example 1 (without adding anti-fibrillation crosslinking agent) The jigger dyeing process to prevent fibrillation of Lyocell woven fabrics includes the following steps: (1) Singeing the Lyocell grey cloth, wherein the lint on the cloth surface is removed by a through-singing method, and the process conditions are two positive and two negative, a vehicle speed of 100 m / min, and a temperature of 1000° C.; the desizing and bleaching process adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water, mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature; Among them, the dosage of amylase 2D-BG is 5g / L (4000U / ml), the dosage of penetrant FK-ST20 is 2g / L, the dosage of NaOH is 10g / L, the dosage of hydrogen peroxide is 5g / L, the dosage of refining agent FK-ST1218H is 5g / L, the dosage of oxygen bleaching stabilizer FK-601 is 5g / L, the dosage of dispersing chelating agent FK-422 is 2g / L, and the cold stacking condition is room temperature stacking, and the stacking time is 20h. (2) Prepare a dyeing working solution, which includes dye, anti-wrinkle agent, sodium sulfate and soda ash, mix the above working solution evenly, and perform the first step of roller dyeing on the lyocell fabric treated in step (1); the dye is triazine type reactive dye black B, the dosage is 5g / L, the dosage of sodium sulfate is 60g / L, and the dosage of soda ash is 15g / L; the anti-wrinkle agent is AC-L, the dosage is 2g / L; The dyeing working solution was gradually added in four times, with 1 / 4 of the dyeing working solution added each time. The dyeing temperature was 60°C and the dyeing time was 15 minutes.

[0056] (3) preparing an anti-fibrillation working solution, wherein no anti-fibrillation crosslinking agent is added; the leveling agent is FK-482, the dosage is 2 g / L; the dispersant is JFC-4, the dosage is 3 g / L, the leveling agent and the dispersant are mixed evenly according to the added amounts, stirred in a high-speed stirrer for 1 hour, the stirrer speed is 2000 r / min, to prepare a stable suspension, the dyeing working solution of step (2) is added, and the second step of roller dyeing is started; the process conditions of the second step of roller dyeing are dyeing temperature of 60°C and dyeing time of 60 min.

[0057] (4) The treated lyocell fabric was washed, soaped, softened and dried. The soaping agent was FK-9500, the soaping temperature was 95° C., the soaping time was 30 min, the drying temperature was 110° C., and the drying time was 1 min.

[0058] Comparative Example 2 (cross-linking before dyeing) The jigger dyeing process to prevent fibrillation of Lyocell woven fabrics includes the following steps: (1) Singeing the Lyocell grey cloth, wherein the lint on the cloth surface is removed by a through-singing method, and the process conditions are two positive and two negative, a vehicle speed of 100 m / min, and a temperature of 1000° C.; the desizing and bleaching process adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water, mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature; Among them, the dosage of amylase 2D-BG is 5g / L (4000U / ml), the dosage of penetrant FK-ST20 is 2g / L, the dosage of NaOH is 10g / L, the dosage of hydrogen peroxide is 5g / L, the dosage of refining agent FK-ST1218H is 5g / L, the dosage of oxygen bleaching stabilizer FK-601 is 5g / L, the dosage of dispersing chelating agent FK-422 is 2g / L, the cold stacking condition is room temperature stacking, and the stacking time is 20h.

[0059] (2) Prepare an anti-fibrillation working solution, wherein the anti-fibrillation crosslinking agent is CB-3, the dosage is 40 g / L; the leveling agent is FK-482, the dosage is 2 g / L; the dispersant is JFC-4, the dosage is 3 g / L, the anti-fibrillation crosslinking agent, the leveling agent and the dispersant are mixed evenly according to the added amount, stirred in a high-speed mixer for 1 hour, the mixer speed is 2000 r / min, to prepare a stable suspension, and start the first step of roller dyeing; the process conditions of the first step of roller dyeing are dyeing temperature 60°C and dyeing time 15 min.

[0060] (3) preparing a dyeing working solution, which includes a dye, an anti-wrinkle agent, sodium sulfate and soda ash, mixing the above working solutions evenly, and subjecting the lyocell fabric treated in step (2) to a second step of jig dyeing; the dye is a triazine type reactive dye black B, the amount of which is 5 g / L, the amount of sodium sulfate is 60 g / L, the amount of soda ash is 15 g / L; the anti-wrinkle agent is AC-L, the amount of which is 2 g / L; The dyeing working solution was gradually added in four times, with 1 / 4 of the dyeing working solution added each time. The dyeing temperature was 60°C and the dyeing time was 60 minutes.

[0061] (4) The treated lyocell fabric was washed, soaped, softened and dried. The soaping agent was FK-9500, the soaping temperature was 95° C., the soaping time was 30 min, the drying temperature was 110° C., and the drying time was 1 min.

[0062] Anti-fibrillation performance test of lyocell fabric before and after treatment: The method for determining the fibrillation degree of lyocell fabric of the present invention is to test the anti-pilling grade of the lyocell fabric and the surface white frost phenomenon of the fabric after washing 5 times and 10 times respectively before and after the treatment. The anti-pilling performance is tested according to GB / T 4802.1-1997 standard, and the lyocell textile is washed according to GB 12799-91 standard, and the results are shown in Table 1. Table 1 Comparison of the surface conditions of Lyocell fabrics before and after washing

[0063] As shown in Table 1, the anti-pilling grade of the Lyocell fabrics (Examples 1-5) treated by the anti-fibrillation jig dyeing process is relatively good after washing 5 and 10 times. The anti-pilling grade of the comparative example 1 is reduced after washing 5 times, and the anti-pilling grade of the comparative example 1 is reduced after washing 5 times. Figure 4-10 It can be seen that the Lyocell fabric of Comparative Example 1 (without anti-fibrillation crosslinking agent) had white frost on the surface after washing 5 times, and the white frost on the surface of the fabric was serious after washing 10 times. The Lyocell fabric of Comparative Example 2 (crosslinked before dyeing) had a phenomenon of light dyeing. The surface anti-fibrillation of the Lyocell fabric treated by the jig dyeing process was relatively excellent. Figure 1-3 It can be seen that the anti-fibrillation effect of Example 1 is the most prominent, and there is no phenomenon of competing with dyes.

[0064] The present invention has been described in detail above. For those skilled in the art, without departing from the purpose and scope of the present invention, and without the need to carry out unnecessary experimental conditions, the present invention can be implemented in a wide range under equivalent parameters, concentrations and conditions. Although the present invention provides specific embodiments, it should be understood that the present invention can be further improved. In a word, according to the principles of the present invention, the application is intended to include any changes, uses or improvements to the present invention, including departure from the disclosed scope in the application, and changes made with conventional techniques known in the art.

Claims

1. A jig-dyeing process for preventing fibrillation of lyocell woven fabrics, comprising the following steps: (1) Singeing, desizing and bleaching the Lyocell fabric; (2) preparing a dyeing working solution, wherein the dyeing working solution comprises a dye, an anti-wrinkle agent, sodium sulfate and soda ash, and mixing the dyeing working solution evenly. After the working solution is heated to a certain temperature, performing the first step of jig dyeing on the lyocell fabric treated in step (1); (3) preparing an anti-fibrillation working solution, wherein the anti-fibrillation working solution comprises an anti-fibrillation cross-linking agent, a leveling agent and a dispersant, stirring the anti-fibrillation working solution at a high speed to obtain a stable suspension, adding the dyeing working solution of step (2) to perform the second step of jig dyeing; (4) Wash, soap, soften and dry the treated Lyocell fabric.

2. The jig dyeing process according to claim 1, characterized in that: In step (1), the singeing is to remove the fluff on the cloth surface by a through-singing method, the process conditions are two positive and two negative, the speed is 100m / min, and the temperature is 1000-1100°C.

3. The jig dyeing process according to claim 1, characterized in that: The desizing and bleaching process in step (1) adopts a cold pad-batch desizing and bleaching one-step process: amylase, penetrant, alkali, hydrogen peroxide, refining agent, oxygen bleaching stabilizer, and dispersing chelating agent are added to water and mixed to obtain a treatment bath, and the grey cloth is padded with the treatment bath, rolled up, and then wrapped, sealed, and stacked at room temperature. Among them, the dosage of amylase is 5-10g / L, and the dosage of osmotic agent is 1-5g / L. The alkali is NaOH, the dosage of NaOH is 6-10 g / L, the hydrogen peroxide is 4-5 g / L, the refining agent is 5-6 g / L, the oxygen bleaching stabilizer is 4-5 g / L, the dispersing chelating agent is 1-2 g / L, and the stacking time is 16-20 hours.

4. The jig dyeing process according to claim 1, characterized in that: In step (2), the dye is one or more of s-triazine type reactive dyes, vinyl sulfone type reactive dyes, and halogenated pyrimidine type reactive dyes; The anti-wrinkle agent is one or more of urea-formaldehyde resin, dimethylolethylene urea resin, dimethylol dihydroxyethylene urea resin, high polymer chitosan, waterborne polyurethane resin, epoxy compound, citric acid, and polymaleic acid; The dyeing working solution is prepared by adding dye, anti-wrinkle agent, sodium sulfate and soda ash into water and mixing them evenly, wherein the amount of dye is 5-20g / L; the amount of anti-wrinkle agent is 1-2g / L; the amount of sodium sulfate is 40-60g / L, and the amount of soda ash is 15-20g / L.

5. The jig dyeing process according to claim 1, characterized in that: In step (2), the first step of jig dyeing process conditions is to gradually add the dyeing working solution in four times, adding 1 / 4 of the dye solution each time, the dyeing temperature is 60-80°C, and the dyeing time is 15-20min.

6. The jig dyeing process according to claim 1, characterized in that: In step (3), the anti-fibrillation cross-linking agent is one or more of a dichlorotriazine compound, a dibromotriazine compound, and 1,3,5-triacryloylhexahydro-1,3,5-triazine, and the amount used is 30-80 g / L; The leveling agent is one or more of fatty alkyl sulfate, alkylbenzene sulfonate, polyethylene glycol alkyl ether sulfate, naphthalenesulfonic acid-formaldehyde condensate, polyethylene glycol ether of fatty amine, polyethylene polyamine, oxyethylated nitrogen-containing fatty alkyl compound, and the dosage is 1-5 g / L; The dispersant is one or more of alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, fatty alcohol polyoxyethylene ether sodium carboxylate, isomeric alcohol polyoxyethylene ether, and the dosage is 3-5 g / L.

7. The jig dyeing process according to claim 1, characterized in that: In step (3), the preparation process of the anti-fibrillation working liquid is to add the anti-fibrillation crosslinking agent, the leveling agent and the dispersant into water according to the added amount, mix them evenly, and stir them in a high-speed stirrer for 1-2 hours to obtain a stable suspension, wherein the stirrer speed is 2000-5000r / min.

8. The jig dyeing process according to claim 1, characterized in that: In step (3), the second step of jig dyeing process conditions are dyeing temperature 60-80°C, dyeing time 45-60min.

9. The jig dyeing process according to claim 1, characterized in that: In step (4), the soaping agent is a mixture of aralkyl polyglycol ester and fatty acid amine, the soaping temperature is 95-100°C, the soaping time is 20-30 minutes, the drying temperature is 110-120°C, and the drying time is 1-2 minutes.

10. The jig dyeing process according to claim 1, characterized in that: The jig dyeing process is suitable for Lyocell woven fabrics and blended fabrics with other fabrics.

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