Continuous pad dyeing of modacrylic nylon cotton fabric and continuous pad dyeing method of modacrylic nylon cotton fabric

Abstract

The invention discloses an modacrylic nylon cotton fabric continuous pad dyeing method and a continuous pad dyeing method thereof, and belongs to the technical field of fabric preparation. The method comprises the following steps: sequentially performing scouring and bleaching, singeing, mercerizing, sizing, dyeing, after-finishing tentering and preshrinking on the modacrylic nylon cotton fabric to obtain a finished product, wherein the specific dyeing process is as follows: padding the shaped fabric in dye liquor at the speed of 50-60 m / min, then sequentially carrying out pre-drying and drying in three groups of drying chambers, and sequentially carrying out baking, reduction steaming, oxidation, water washing, soaping, water washing and drying on the dried fabric to obtain the dyed fabric. According to the continuous pad dyeing method, continuous pad dyeing treatment is conducted through a long vehicle, the production process is short, efficiency is high, the fabric has the advantages of being high in brightness, level dyeing degree, dry and wet rubbing fastness, fiber staining fastness and washing color fastness, good in hand feeling and small in color difference, the production efficiency is greatly improved, and application and popularization of the continuous pad dyeing technology of the modacrylic nylon cotton are promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of fabric preparation, and particularly relates to a continuous pad dyeing method of a nylon-cotton fabric. Background Art

[0002] With the continuous improvement of science and technology, people require clothing to be not only comfortable and protective, but also have excellent fastness properties such as water resistance, light resistance, and friction resistance, as well as durability. Acrylic fiber is a modified acrylic fiber, which is copolymerized by acrylonitrile monomer and vinyl compounds containing flame retardant elements. It has a wool-like feel and high flame retardancy, and is resistant to acids and chemicals. As a functional fiber, it has been widely used in Japan, Europe and the United States for household textiles, protective clothing fabrics, decorative textile materials, etc.

[0003] Acrylic dyeing is mainly suitable for cationic dye overflow, roller dyeing and other methods. The color yield is high through long-term, high-temperature and high-pressure dyeing, but its production efficiency is extremely low, the color difference is large, and there are many wrinkles. Acrylic, nylon and cotton blended fabrics are difficult to dye with traditional long-machine pad dyeing, or even cannot be dyed. There are problems such as insufficient brightness, insufficient depth, serious flowery fabric surface, uneven two phases, poor hair effect and hard hand feel. There are also problems such as multiple fibers, poor fastness to washing, sun exposure, dry and wet friction, and serious staining. At present, there are almost no manufacturers in China and abroad that use continuous pad dyeing and finishing technology for the dyeing of acrylic nylon cotton fabrics, which affects the market development of acrylic nylon cotton series products. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a continuous pad dyeing of acrylic nylon cotton fabric and a continuous pad dyeing method thereof, which can solve the problems of long printing and dyeing time, low production efficiency, difficulty in dyeing, insufficient brightness, insufficient depth, serious floweriness on the surface, uneven two phases, poor hair effect and hard hand feel of the existing acrylic nylon cotton, as well as poor fastness to multi-fiber, washing, sun exposure, dry and wet friction, and serious staining of the fabric, and has a full, two-phase uniform, thick and soft style, and also has high fastness to multi-fiber, washing, sun exposure, and dry and wet friction.

[0005] To achieve the above purpose, the technical solution adopted by the present invention to solve the technical problem is:

[0006] A process for continuous pad dyeing of acrylic nylon cotton fabric, wherein the acrylic nylon cotton fabric is subjected to scouring, bleaching, singeing, mercerizing, shaping, dyeing, post-finishing, stenting and pre-shrinking in sequence to obtain a finished product; wherein the specific process of dyeing is as follows:

[0007] The shaped fabric is dipped into the dye solution at a speed of 50-60 m / min, and then pre-dried and dried in three sets of drying chambers in sequence. The dried fabric is then sequentially baked, reduced steamed, oxidized, washed, soaped, washed and dried to obtain a dyed fabric;

[0008] The formula of the dye solution includes disperse dyes with high washing fastness and vat dyes in a mass ratio of 1 to 2:1. The specific composition of the two is as follows:

[0009] Types of high washing fastness disperse dyes: Disperse blue SHWF 6-10g / L, disperse yellow brown WHWSP 1-2g / L, disperse red PUD-4B 2-3g / L, anti-migration agent KL 10-20g / L;

[0010] Types of vat dyes: vat olive T 0.8-1.5g / L, vat red 6B 0.4-1.0g / L, vat black BCN 2-3g / L, anti-migration agent KL 10-20g / L;

[0011] The baking temperature of disperse dyes is 195-200℃, and the baking time is 2-2.5min.

[0012] The reducing solution used in the reduction steam color development is composed of the following components:

[0013] Hydrosulfite 25-30g / L, caustic soda 25-30g / L.

[0014] The steaming liquid rate of reducing steam is 60%, and the color development of reducing steam is: temperature 101-103°C, time 90s.

[0015] The present invention first performs scouring, mercerizing and shaping before printing and dyeing, wherein the scouring and mercerizing can achieve the effect that the dye penetrates the fiber during continuous roller dyeing, the fabric has a high dyeing rate, the fabric surface is uniform, the effect is good, and the strength is high; and the shaping can achieve the effect that the continuous roller dyeing is smooth, wrinkle-free, and efficient.

[0016] The dye liquor of the invention adopts disperse and vat dyes with high multi-fiber staining fastness, and adds a penetrant and an anti-migration agent to the dye, so that the dye liquor can penetrate the fiber uniformly, dye the fiber quickly and have a high dyeing rate; during the color fixing steaming, a combination of caustic soda and insurance powder is adopted in the reducing liquid, and the dosage of caustic soda and insurance powder is reasonably controlled, so that the fiber can obtain deep color, good color fixing, less floating color, excellent color fastness, uniform and rich color, small front and back color difference, and has the advantages of low cost.

[0017] The continuous pad dyeing and finishing technology constructed by the present invention has a short production process and high efficiency. The product has high wear resistance, tear resistance, uniform cloth surface, high color fastness, excellent hand feel, etc., which greatly improves the production efficiency and promotes the promotion and application of continuous pad dyeing of acrylic nylon cotton.

[0018] Furthermore, the mass ratio of the high washing fastness disperse dye to the vat dye is 1.5:1.

[0019] Furthermore, the disperse dye is baked at a temperature of 195-200° C. and a baking time of 2-2.5 min.

[0020] Furthermore, the steaming liquid rate of the reduction steaming is 100%, the steaming temperature is 100-102° C., and the steaming time is 2-2.5 min.

[0021] Furthermore, the scouring and bleaching process adopts a two-immersion and two-rolling method to immerse and roll the scouring and bleaching working liquid, the track temperature is 70-72°C, the stacking time is 60-70min, the vehicle speed is 70-80m / min, and the liquid carrying rate is 85-95%.

[0022] Further, the formula of the scouring and bleaching working solution is as follows:

[0023] Scouring enzyme OBSZ188 8-10g / L, refining agent JG-130 5-6g / L, sodium hydroxide 10-11g / L, hydrogen peroxide 7-8g / L.

[0024] Furthermore, mercerization adopts low alkali concentration mercerization, and the formula of mercerization working solution is as follows:

[0025] Caustic soda 100-110g / L.

[0026] Furthermore, the specific process of finalization is:

[0027] The mercerized fabric is shaped at 180-185°C, and the cloth dropping temperature is less than or equal to 45°C.

[0028] The present invention adopts low-temperature stenting, and through stenting and shaping, the hidden wrinkles of the semi-finished product can be eliminated, and the hand feeling is not hard, so as to achieve the effect of smooth continuous roller dyeing, no wrinkles and high efficiency.

[0029] Furthermore, the post-finishing stretching adopts soft finishing, and the modified polyurethane fastness enhancer DSA and the super softener MJ-8237 are added into the auxiliary agent for combined finishing.

[0030] Further, the formula of the post-finishing stentering finishing liquid is:

[0031] Modified polyurethane fastness enhancer DSA20-30g / L, super softener MJ-8237 20-30g / L

[0032] Furthermore, during the padding process of the fabric, the liquid carrying rate is 50-55%, the drying temperature is 150-160° C., the vehicle speed is 70-80 m / s, and the fabric width is 152-153 cm.

[0033] Further, the soft fabric is pre-shrunk, the shrinkage rate is controlled within -3%, and the width is controlled within 150-151 cm to obtain a finished product.

[0034] Beneficial effects of the present invention:

[0035] 1. The present invention adopts a low temperature of 70°C for pre-treatment scouring and bleaching, a low-alkali treatment for oxygen bleaching in one bath, a low-temperature 180°C tentering for shaping, and a low-alkali concentration for mercerizing. By improving the above processes, the wool effect of the semi-finished product is effectively improved, the strength of the fabric is guaranteed, and the color brightness is improved.

[0036] 2. The present invention adopts a long-machine continuous roller dyeing method during dyeing. Through the research and continuous optimization of the dyeing process, process conditions, dyes and chemicals, and dye color matching, the difficult problems of continuous roller dyeing on acrylic chlorofiber, nylon, and cotton blended fibers, the surface of the fabric is blurred, the two phases are uneven, the hand feel is hard, and the fastness is poor. The product has both high color and uniformity of the surface effect, and high fastness to multi-fiber staining, washing, sun exposure, and dry and wet friction.

[0037] 3. The present invention improves the color fastness to dry and wet friction, softness and thickness of the product by adding a combination of a modified polyurethane fastness enhancer DSA and a super softener MJ-8237 into the auxiliary agent used in the post-finishing process.

[0038] 4. The present invention adopts continuous pad dyeing and finishing technology, which not only has a short production process and high efficiency, but also has the advantages of high brightness, uniformity of dyeing, dry and wet friction fastness, fiber staining fastness, washing color fastness, excellent hand feel and small color difference in the fabric, which greatly improves the production efficiency and promotes the popularization and application of continuous pad dyeing technology of acrylic nylon cotton. DETAILED DESCRIPTION

[0039] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0040] Experimental example: Screening of disperse dyes and vat dyes

[0041] Through a large number of tests, disperse dyes and vat dyes with excellent multi-fiber staining fastness were screened out. The specific tests are shown in Table 1 and Table 2:

[0042] Table 1: Comparative experimental data of disperse dye multi-fiber staining fastness performance

[0043]

[0044]

[0045]

[0046] Table 2: Comparative experimental data of color fastness performance of vat dyes on multiple fibers

[0047]

[0048]

[0049]

[0050] Example 1

[0051] A continuous pad dyeing process for acrylic nylon cotton fabric comprises the following steps

[0052] S1. Scouring and bleaching: The scouring and bleaching working solution is dipped and rolled in a two-dipping and two-rolling method, with a track temperature of 70°C, a stacking time of 60 minutes, a vehicle speed of 70m / min, and a liquid rate of 85%; scouring enzyme OBSZ188 8g / L, scouring agent JG-130 5g / L, sodium hydroxide 10g / L, and hydrogen peroxide 7g / L. The purpose is to use chemical and physical mechanical effects to remove impurities on the fabric, making the fabric white, soft, and having good permeability;

[0053] S2, singeing: removing the fluff on the surface of the shaped fabric to obtain a singed fabric.

[0054] S3, Mercerization: Use low alkali concentration mercerization, caustic soda 100g / L, to improve the wool effect of semi-finished products, ensure the strength of the fabric, and enhance the color brightness.

[0055] S4, shaping: the mercerized fabric is stretched and shaped at 180°C, the speed is 90m / min, the cloth dropping temperature is 45°C, the cloth dropping width is 158cm, there is no weft bias, and it is rolled to make it have no wrinkle marks, so as to obtain a shaped fabric;

[0056] S5. Dyeing: The dye liquor includes high wash fastness disperse dye and vat dye in a mass ratio of 1.5:1. The specific composition of the two is as follows:

[0057] Types of high washing fastness disperse dyes: Disperse blue SHWF 6g / L, disperse yellow brown WHWSP 1g / L, disperse red PUD-4B 2g / L, anti-migration agent KL 10g / L;

[0058] Types of vat dyes: vat olive T 0.8g / L, vat red 6B 0.4g / L, vat black BCN 2g / L, anti-migration agent KL 10g / L;

[0059] The baking temperature of disperse dyes is 195℃ and the baking time is 2min.

[0060] The reducing solution used in the reduction steam color development is composed of the following components:

[0061] Hydrosulfite 25g / L, caustic soda 25g / L.

[0062] The steaming liquid carrying rate of the reduction steaming is 60%, and the reduction steaming color development is: temperature 102°C, time 90s, normal temperature water washing, soap washing (soaping agent ST230: 3g / L, temperature 95°C, time 2.0min), hot water washing, normal temperature water washing, and drying to obtain the dyed fabric.

[0063] S6. Softening finishing: The dyed fabric was dipped into a combination of modified polyurethane fastness enhancer DSA and super softener MJ-8237 for finishing, with modified polyurethane fastness enhancer DSA 25g / L, super softener MJ-8237 25g / L, vehicle speed 70m / min, liquid carrying rate 50%, and then dried at 150°C for 1min to obtain a soft finished fabric.

[0064] S7, pre-shrinking: pre-shrink the soft finished fabric, control the shrinkage rate within -2.5%, and control the width within 150-151 cm to obtain the finished product.

[0065] Example 2

[0066] A continuous pad dyeing process for acrylic nylon cotton fabric comprises the following steps

[0067] S1. Scouring and bleaching: The scouring and bleaching working liquid is dipped and rolled in a two-dipping and two-rolling manner, the track temperature is 72°C, the stacking time is 70 minutes, the vehicle speed is 80m / min, and the liquid rate is 95%; scouring enzyme OBSZ188 10g / L, refining agent JG-130 6g / L, sodium hydroxide 11g / L, hydrogen peroxide 8g / L. The purpose is to use chemical and physical mechanical effects to remove impurities on the fabric, making the fabric white, soft, and having good permeability;

[0068] S2, singeing: removing the fluff on the surface of the shaped fabric to obtain a singed fabric.

[0069] S3, Mercerization: Use low alkali concentration mercerization, caustic soda 110g / L, to improve the wool effect of semi-finished products, ensure the strength of the fabric, and enhance the color brightness.

[0070] S4, shaping: the mercerized fabric is stretched and shaped at 185°C, the speed is 80m / min, the cloth dropping temperature is 45°C, the cloth dropping width is 158cm, there is no weft bias, and it is rolled to make it have no wrinkle marks, so as to obtain a shaped fabric;

[0071] S5. Dyeing: The dye liquor includes high wash fastness disperse dye and vat dye in a mass ratio of 1.5:1. The specific composition of the two is as follows:

[0072] Types of high washing fastness disperse dyes: Disperse blue SHWF 10g / L, disperse yellow brown WHWSP 2g / L, disperse red PUD-4B 3g / L, anti-migration agent KL 20g / L;

[0073] Types of vat dyes: vat olive T 1.5g / L, vat red 6B 1.0g / L, vat black BCN 3g / L, anti-migration agent KL 20g / L;

[0074] The baking temperature of disperse dyes is 200℃ and the baking time is 2.5min.

[0075] The reducing solution used in the reduction steam color development is composed of the following components:

[0076] Hydrosulfite 30g / L, caustic soda 30g / L.

[0077] The steaming liquid carrying rate of the reduction steaming is 65%, and the reduction steaming color development is: temperature 102°C, time 90s, normal temperature water washing, soap washing (soaping agent ST230: 3g / L, temperature 95°C, time 2.0min), hot water washing, normal temperature water washing, and drying to obtain the dyed fabric.

[0078] S6. Softening finishing: The dyed fabric was dipped into a combination of modified polyurethane fastness enhancer DSA and super softener MJ-8237, modified polyurethane fastness enhancer DSA 30g / L, super softener MJ-8237 30g / L, vehicle speed 80m / min, liquid carrying rate 55%, and then dried at 160℃ for 1min to obtain a soft finished fabric.

[0079] S7. Pre-shrinking: pre-shrink the soft finished fabric, control the shrinkage rate within -2.4%, and control the width within 150-151 cm to obtain the finished product.

[0080] Example 3

[0081] A continuous pad dyeing process for acrylic nylon cotton fabric comprises the following steps

[0082] S1. Scouring and bleaching: The scouring and bleaching working solution is dipped and rolled in a two-dipping and two-rolling method, with a track temperature of 71°C, a stacking time of 65 minutes, a vehicle speed of 75 m / min, and a liquid rate of 90%; scouring enzyme OBSZ188 9 g / L, scouring agent JG-130 5.5 g / L, sodium hydroxide 10.5 g / L, and hydrogen peroxide 7.5 g / L. The purpose is to use chemical and physical mechanical effects to remove impurities on the fabric, making the fabric white, soft, and having good permeability;

[0083] S2, singeing: removing the fluff on the surface of the shaped fabric to obtain a singed fabric.

[0084] S3, Mercerization: Use low alkali concentration mercerization, caustic soda 105g / L, to improve the wool effect of semi-finished products, ensure the strength of the fabric, and enhance the color brightness.

[0085] S4, shaping: the mercerized fabric is stretched and shaped at 182°C, the speed is 85m / min, the cloth dropping temperature is 45°C, the cloth dropping width is 158cm, there is no weft bias, and it is rolled to make it have no wrinkle marks, so as to obtain a shaped fabric;

[0086] S5. Dyeing: The dye liquor includes high wash fastness disperse dye and vat dye in a mass ratio of 1.5:1. The specific composition of the two is as follows:

[0087] Types of high washing fastness disperse dyes: Disperse blue SHWF 8g / L, disperse yellow brown WHWSP 1.5g / L, disperse red PUD-4B 2.5g / L, anti-migration agent KL 15g / L;

[0088] Types of vat dyes: vat olive T 1.0g / L, vat red 6B 0.8g / L, vat black BCN 2.5g / L, anti-migration agent KL 15g / L;

[0089] The baking temperature of disperse dyes is 198°C and the baking time is 2.2 minutes.

[0090] The reducing solution used in the reduction steam color development is composed of the following components:

[0091] Hydrosulfite 28g / L, caustic soda 28g / L.

[0092] The steaming liquid carrying rate of the reduction steaming is 65%, and the reduction steaming color development is: temperature 102°C, time 90s, normal temperature water washing, soap washing (soaping agent ST230: 3g / L, temperature 95°C, time 2.0min), hot water washing, normal temperature water washing, and drying to obtain the dyed fabric.

[0093] S6. Softening finishing: The dyed fabric was dipped into a combination of modified polyurethane fastness enhancer DSA and super softener MJ-8237 for finishing, with modified polyurethane fastness enhancer DSA 25g / L, super softener MJ-8237 25g / L, vehicle speed 75m / min, liquid carrying rate 53%, and then dried at 155°C for 1min to obtain a soft finished fabric.

[0094] S7. Pre-shrinking: pre-shrink the soft finished fabric, control the shrinkage rate within -2.3%, and control the width within 150-152 cm to obtain the finished product.

[0095] The finished fabrics of Example 1, Example 2 and Example 3 after dyeing and finishing were tested, and the results are shown in Table 3:

[0096] Table 3 Main performance indicators of finished products

[0097]

[0098] According to the data in Table 1, Table 2 and Table 3, by adopting the continuous pad dyeing process of the present invention, the printed and dyed acrylic nylon cotton fabric has the advantages of high friction fastness, high multi-fiber staining fastness, high light fastness, high perspiration fastness, high soaping fastness, high pilling fastness, high strength index, and the fabric surface is uniform and soft to the touch. At the same time, the present invention has the advantages of short dyeing time and high work efficiency.

[0099] At the same time, the present invention optimizes the dyeing method and adopts a long-machine continuous roller dyeing method for dyeing, thereby solving the problems of difficulty in coloring several blended fibers of acrylic, chlorinated, nylon and cotton, flowery fabric surface, uneven two phases, hard hand feel, poor fastness, etc. in continuous roller dyeing. It is also convenient for production operation and is extremely easy to control, so that the product has both high color yield and fabric surface effect uniformity and high fastness.

[0100] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for continuous pad dyeing of nylon-cotton fabric, characterized in that: The following steps are involved: S1. Using a low-alkali oxygen bleaching one-bath process at 60-70°C to scour and bleach the acrylic nylon cotton fabric; S2. After scouring and bleaching, singeing, mercerizing and shaping are carried out in sequence; S3, dyeing treatment is then carried out by long-wheel continuous pad dyeing, specifically: the shaped fabric is dipped into the dye solution, and then pre-dried and dried in several groups of drying chambers in sequence, and the dried fabric is baked, reduced steamed, oxidized, washed, soaped, washed and dried in sequence to obtain a dyed fabric; wherein the dye solution used in the dyeing process includes disperse dyes and vat dyes in a mass ratio of 1 to 2:1; S4. After dyeing, post-finishing and stenting treatment are carried out, and then pre-shrinking treatment is carried out.

2. The method according to claim 1, characterized in that The specific process of scouring and bleaching acrylic nylon cotton fabric using low-alkali oxygen bleaching one-bath process is as follows: The scouring and bleaching working liquid is dipped and rolled in a two-dipping and two-rolling manner, the track temperature is 70-72°C, the stacking time is 60-70min, the vehicle speed is 70-80m / min, and the liquid carrying rate is 85-95%.

3. The method according to claim 2, characterized in that The scouring and bleaching working solution includes the following components in concentration: Scouring enzyme OBSZ188 8-10g / L, refining agent JG-130 5-6g / L, sodium hydroxide 10-11g / L, hydrogen peroxide 7-8g / L.

4. The method according to claim 1, characterized in that: Mercerizing treatment is carried out using caustic soda at a concentration of 100-110g / L.

5. The method according to claim 1, characterized in that The specific process of finalization is as follows: The mercerized fabric is shaped at 180-185℃, and the cloth dropping temperature is less than or equal to 45℃.

6. The method according to claim 1, characterized in that The reducing liquid used for reducing steam color development includes the following components in concentration: 20-25 g / L of sodium hypochlorite and 20-25 g / L of caustic soda; the steaming liquid rate of reducing steam is 60%, the color development temperature is 101-103°C, and the time is 90s.

7. The method according to claim 1, characterized in that The disperse dye is a high washing fastness disperse dye, which includes the following components in concentration: disperse blue SHWF 6-10g / L, disperse yellow brown WHWSP 1-2g / L, disperse sauce red PUD-4B 2-3g / L and anti-migration agent KL 10-20g / L.

8. The method according to claim 1, characterized in that The vat dye includes the following components in concentrations: vat olive T 0.8-1.5 g / L, vat red 6B 0.4-1.0 g / L, vat black BCN 2-3 g / L and anti-migration agent KL 10-20 g / L.

9. The method according to claim 1, characterized in that: The auxiliaries used in the post-finishing stentering process include the following components in the following concentrations: Modified polyurethane fastness enhancer DSA 20-30g / L and super softener MJ-8237 20-30g / L.

10. A nylon-cotton fabric, characterized in that: The method is prepared by any one of claims 1 to 8.

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