Production process of a velvet fabric with a brushed and contrasted color

Abstract

The present application relates to a kind of production process of napped and contrasted silk and nylon fabric, including normal temperature into cylinder, adding dye and dyeing auxiliary agent, first temperature is raised to 95-105 DEG C, then keep warm 30-50 min, temperature is reduced to 50 DEG C, and then soaping is carried out;After dyeing, carry out fixation treatment, first add acid fixing agent, anti-fixing spot cleaning agent and citric acid from normal temperature to 55-70 DEG C, keep warm 30-40 min, after keeping warm, temperature is reduced to 50 DEG C, and wash water twice;The fabric is napped, when the fabric is light, after napping, fabric returns into cylinder;When the fabric is dark or special color, after napping, carry out drying, one dip one roll is done cation fixation, and fabric returns into cylinder and carries out fixation treatment again;When the fabric is black, after napping, carry out drying, one dip one roll is done water, and fabric returns into cylinder and carries out fixation treatment again;Carry out after setting to fabric.The present application can improve the wash fastness of fabric, make the fastness effect of material, continuous and stable, and the staining condition after washing is good, and no obvious staining is generated.

Description

Technical Field

[0001] This invention relates to the field of textile technology, and in particular to a production process for a brushed color-blocked nylon-spandex fabric. Background Technology

[0002] Color-blocked fabrics have become an important development trend in the textile industry in recent years. By improving fastness and other technologies, they endow textiles with the ability to withstand washing and have minimal color staining, and have broad application prospects in outdoor sports and high-end home furnishings.

[0003] Knitted nylon / spandex blends or interweaves are among the preferred substrates for the aforementioned applications due to their excellent elastic recovery, abrasion resistance, soft hand feel, and comfortable fit. However, improving the fastness of nylon / spandex fabrics over a long period without compromising the excellent properties of the substrate itself presents a significant challenge in dyeing and finishing processes, which constitutes the core starting point of this invention.

[0004] The existing technical solutions and bottlenecks are mainly reflected in the following aspects: The challenge of balancing durability and performance. If cationic color-fixing agents are used in the later stages of dyeing to improve fabric fastness in pursuit of high performance and durability, it is very easy to cause the fabric to feel stiff and rough, and the elasticity to deteriorate significantly, thus sacrificing the core performance value of nylon-spandex fabrics.

[0005] Conversely, if conventional dyeing and color fixing are used, and the post-setting stage only focuses on achieving a hydrophilic feel, the fabric's colorfastness will be unstable, with extremely poor colorfastness for dark and special colors, uneven color staining in simulated color blocking, and an inability to meet the durability requirements of practical applications. Existing processes struggle to achieve a stable and reliable balance between functional colorfastness and the fabric's original softness and elasticity.

[0006] Process complexity and energy consumption issues Traditionally, the production of color-blocked nylon-spandex fabrics has involved a step-by-step process: first, dyeing and finishing the base material, then performing separate functional finishing. This not only prolongs the process and increases energy and water consumption, but also can lead to cumulative damage to the fabric's inherent qualities (such as elasticity) due to multiple rework processes. There is a lack of an integrated process that efficiently combines dyeing and functional finishing. Summary of the Invention

[0007] The purpose of this invention is to provide a production process for brushed and color-blocked nylon-spandex fabrics, which can improve the wash fastness of the fabric, make the fastness effect of the material stable and continuous, and the color staining after washing is good with no obvious color staining.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a production process for a brushed color-blocked nylon-spandex fabric, comprising the following steps: Step S1: Place the dye and dyeing auxiliaries into the vat at room temperature. First, heat the vat to 95℃-105℃ and keep it at that temperature for 30-50 minutes. Then, cool it down to 50℃ and perform soaping. Step S2: After dyeing, perform color fixing treatment. First, add acidic color fixing agent, anti-fixing stain remover and citric acid and heat from room temperature to 55-70℃. Keep it at this temperature for 30-40 minutes. After the heat is maintained, cool it down to 50 degrees and wash it twice. Step S3: Brush the fabric. When the fabric is light-colored, return it to the dyeing vat after brushing. When the fabric is black, dry it after brushing, dip and rub it once to remove water, and then return it to the dyeing vat for color fixing. When the fabric is dark or special color other than black, dry it after brushing, dip and rub it once to remove cationic color fixing, and then return it to the dyeing vat for color fixing.

[0009] Step S4: Post-fixing of the fabric.

[0010] Furthermore, the dyeing auxiliaries in step S1 are a leveling agent with a concentration of 0.3-1.5 g / L and an acid-releasing agent with a concentration of 0.3-1 g / L.

[0011] Furthermore, the heating rate in step S1 is 0.5-1.5℃ / min, and the cooling rate is 1-2℃ / min.

[0012] Furthermore, in step S2, the concentration of the acidic fixing agent is 2-4% owf, the concentration of the anti-fixing stain cleaning agent is 0.3-0.5 g / L, and the concentration of citric acid is 0.3-0.5 g / L.

[0013] Furthermore, the heating rate and cooling rate in step S2 are both 1-2℃ / min.

[0014] Furthermore, in step S3, when the fabric is a dark color other than black or a special color, after brushing, it is dried, and cationic color fixing is performed by one dip and one nibble. The fabric is then returned to the drum for further color fixing treatment. The process is as follows: after brushing, the fabric is dried at a temperature of 140-180℃ and a speed of 25m / min. It is then cationic color fixing is performed by one dip and one nibble. The fabric is then returned to the drum, where anionic color fixing agent, anti-color stain cleaning agent, and citric acid are added. The temperature is raised from room temperature to 75-90℃ and kept at that temperature for 30-40 minutes. After the heat preservation is completed, the temperature is lowered to 50℃ and the fabric is washed twice.

[0015] Furthermore, in step 3, the concentration of the anionic fixing agent is 3-5% owf, the concentration of the anti-fixing stain cleaning agent is 0.3-0.5 g / l, the concentration of citric acid is 0.3-0.7 g / l, the heating rate from room temperature to 75-90℃ is 1-2℃ / min, and the cooling rate from room temperature to 50℃ is 1-2℃ / min.

[0016] Furthermore, in step S3, when the fabric is black, after brushing, it is dried, dipped and rolled once, and then returned to the drum for color fixing treatment. The process is further as follows: after brushing, it is dried at a temperature of 140-180℃ and a speed of 25m / min. It is dipped and rolled once, then returned to the drum, a cationic color fixing agent is added, the temperature is raised from room temperature to 40-55℃, and kept at that temperature for 20-30 minutes. After the temperature holding period, it is cooled to room temperature and washed twice.

[0017] The concentration of the cationic fixing agent is 2-3% owf, the heating rate from room temperature to 40-55℃ is 1-2℃ / min, and the cooling rate from room temperature to room temperature after heat preservation is 1-2℃ / min.

[0018] Furthermore, step S4 further comprises: setting the temperature to 180℃, the speed to 21m / min, and performing a dip and roll to achieve a hydrophilic feel, in accordance with the order specifications.

[0019] The beneficial effects of this invention: The dyeing and finishing process of the color-blocking material of this invention improves the wash fastness of the fabric through a reasonable dyeing and finishing process, perfectly achieving the color-staining requirements of simulated garment washing and color-blocking. It ensures the material's fastness is consistently stable, with good color staining after washing and no obvious staining. Furthermore, it balances excellent color fastness and a superior fabric finish. This effectively addresses consumers' concerns about color bleeding in garment splicing, satisfying customers' pursuit of fashionable styles and high cost-effectiveness. Attached Figure Description

[0020] Figure 1 The image shows the test results of the fastness of the dark-colored fabric produced using the process of this invention to create a color-blocked pattern. Figure 2 The image shows the test results of the fastness of light-colored fabric produced using the process of this invention to manufacture a color-blocked pattern. Figure 3 Test results of dark-colored fabrics with contrasting colors after washing, produced using the process of this invention; Figure 4 Test results of light-colored fabrics with contrasting colors after washing, produced using the process of this invention; Figure 5 The simulated garment washing pattern with contrasting dark blue and white colors produced using the process of this invention shows that the color-blocking result is qualified by visual inspection. Figure 6 The simulated garment washing pattern with green and white contrasting colors produced using the process of this invention shows that the color contrasting result is qualified by visual inspection. Figure 7 The simulated garment washing pattern with black and white contrasting colors produced using the process of this invention shows that the color contrasting result is qualified by visual inspection. Figure 8The simulated garment washing pattern with blue and white contrasting colors produced using the process of this invention shows that the color contrasting result is qualified by visual inspection. Figure 9 The simulated garment wash pattern showing purple and white color blocking produced using the process of this invention shows that the color blocking result is acceptable by visual inspection. Figure 10 The simulated garment washing pattern with red and white contrasting colors produced using the process of this invention shows that the color contrasting result is qualified by visual inspection. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Please see Figures 1 to 10 The present invention provides an embodiment: a production process for a brushed color-blocked nylon-spandex fabric, comprising the following steps: Step S1: Place the dye and dyeing auxiliaries into the vat at room temperature. First, heat the vat to 95℃-105℃ and keep it at that temperature for 30-50 minutes. Then, cool it down to 50℃ and perform soaping. Step S2: After dyeing, perform color fixing treatment. First, add acidic color fixing agent, anti-fixing stain remover and citric acid and heat from room temperature to 55-70℃. Keep it at this temperature for 30-40 minutes. After the heat is maintained, cool it down to 50 degrees and wash it twice. Step S3: Brush the fabric. When the fabric is light-colored, return it to the dyeing vat after brushing. When the fabric is black, dry it after brushing, dip and rub it once to remove water, and then return it to the dyeing vat for color fixing. When the fabric is dark or special color other than black, dry it after brushing, dip and rub it once to remove cationic color fixing, and then return it to the dyeing vat for color fixing.

[0023] Step S4: Post-fixing of the fabric.

[0024] Please continue reading. Figures 1 to 10 As shown, in one embodiment of the present invention, the dyeing auxiliaries in step S1 are a leveling agent with a concentration of 0.3-1.5 g / L and an acid-releasing agent with a concentration of 0.3-1 g / L.

[0025] Please continue reading. Figures 1 to 10 As shown, in one embodiment of the present invention, the heating rate in step S1 is 0.5-1.5℃ / min, and the cooling rate is 1-2℃ / min.

[0026] Please continue reading. Figures 1 to 10 As shown, in one embodiment of the present invention, the concentration of the acidic fixing agent in step S2 is 2-4% owf, the concentration of the anti-fixing stain cleaning agent is 0.3-0.5 g / L, and the concentration of citric acid is 0.3-0.5 g / L.

[0027] Please continue reading. Figures 1 to 10 As shown, in one embodiment of the present invention, the heating rate and cooling rate in step S2 are both 1-2℃ / min.

[0028] Please continue reading. Figures 1 to 10 As shown, in one embodiment of the present invention, when the fabric is a dark color or special color other than black in step S3, after brushing, it is dried, and cationic color fixing is performed by one dip and one nibble. The fabric is then returned to the drum for further color fixing treatment. The process is as follows: after brushing, the fabric is dried at a temperature of 140-180℃ and a speed of 25m / min. After one dip and one nibble, cationic color fixing is performed. The fabric is then returned to the drum, where anionic color fixing agent, anti-color stain cleaning agent, and citric acid are added. The temperature is raised from room temperature to 75-90℃ and kept at that temperature for 30-40 minutes. After the temperature is kept at that temperature, the temperature is lowered to 50℃ and the fabric is washed twice.

[0029] Please continue reading. Figures 1 to 10 As shown, in one embodiment of the present invention, the concentration of the anionic fixing agent in step 3 is 3-5% owf, the concentration of the anti-fixing stain cleaning agent is 0.3-0.5 g / l, the concentration of citric acid is 0.3-0.7 g / l, the heating rate from room temperature to 75-90°C is 1-2°C / min, and the cooling rate from room temperature to 50°C is 1-2°C / min.

[0030] Please continue reading. Figures 1 to 10 As shown, in one embodiment of the present invention, when the fabric is black, step S3 involves drying after brushing, washing with a dip and a roll, and then returning the fabric to the vat for color fixing. The process is further as follows: after brushing, the fabric is dried at a temperature of 140-180℃ and a speed of 25m / min. It is then washed with a dip and a roll, returned to the vat, and a cationic color fixing agent is added. The temperature is raised from room temperature to 40-55℃ and held for 20-30 minutes. After the holding period, the temperature is lowered to room temperature and the fabric is washed twice.

[0031] The concentration of the cationic fixing agent is 2-3% owf, the heating rate from room temperature to 40-55℃ is 1-2℃ / min, and the cooling rate from room temperature to room temperature after heat preservation is 1-2℃ / min.

[0032] Please continue reading. Figure 5 As shown, in one embodiment of the present invention, step S4 is further described as follows: the temperature is set at 180°C, the speed is 21 m / min, and the process involves immersion and rolling to achieve a hydrophilic feel, in accordance with the specifications required by the order. Specific Implementation

[0033] It is made of knitted fabric interwoven with nylon and spandex, with the following composition: 84% Nylon and 16% Elastane.

[0034] (1) Staining: Enter the dyeing vat at room temperature. Staining formula: X %owf Leveling agent 1.2 g / L Acid-releasing agent 0.3 g / L The temperature is increased to 98°C at a rate of 0.8°C / min throughout the process, held at that temperature for 40 minutes, and then cooled to 50°C at a rate of 1.5°C / min before soap washing.

[0035] (2) Post-dyeing treatment: After dyeing, a color-fixing treatment is performed to strengthen the color fastness. The process is as follows: Acidic fixing agent 2-4% owf Anti-stain cleaner 4g / L Citric acid 0.5g / L Heat the sample to 60 degrees Celsius at a rate of 2°C / min, hold for 30 minutes, and then cool it to 50 degrees Celsius at a rate of 1.5°C / min. Wash the sample twice. (3) ① Light color: Return it to the cylinder without further treatment.

[0037] ②Dark / Special Colors: After brushing, the material is dried at 160℃ and 25m / min. It undergoes a one-dip, one-paste process for cationic color fixing and is then returned to the dyeing vat. After dyeing, a color-fixing treatment is performed to enhance colorfastness. The process is as follows: Anionic fixing agent 4% owf Anti-stain cleaner 0.5g / L Citric acid 0.5g / L Heat the sample to 80 degrees Celsius at a rate of 2°C / min from room temperature and hold for 30 minutes. After holding, cool the sample to 50 degrees Celsius at a rate of 1.5°C / min and wash it twice.

[0038] ③ Black: After sanding, it is dried at a temperature of 160℃ and a speed of 25m / min. It is then dipped and rolled to remove water before being returned to the cylinder.

[0039] After dyeing, a color-fixing treatment is performed to enhance colorfastness. The process is as follows: Cationic fixing agent 2% owf Heat the sample to 45 degrees Celsius at a rate of 2°C / min from room temperature, hold for 20 minutes, and then cool it back to room temperature at a rate of 1.5°C / min. Wash the sample twice.

[0040] (4) Set the temperature to 180℃ and the speed to 21m / min for one dip and one roll to achieve a hydrophilic feel and meet the specifications required by the order.

[0041] The dyeing and fixing processes are conducted at a neutral to slightly acidic pH to avoid strong acid or alkaline environments that could corrode the phase change material. Hydrophilic softening agents are selected for subsequent application, avoiding silicone oils or cross-linking agents to ensure their chemical stability and prevent damage to the phase change material fibers or impact on the material's strength and functionality. Figures 1 to 10 The test results show that the color-blocking production process of the present invention has a significant effect on improving the color fastness and the garment's ability to withstand multiple washes. The finished product has good color fastness, the color-blocking does not bleed, the stitching is not easy to crack, and it can withstand repeated washing. The color-blocking process has been improved in many colors, which can meet customers' pursuit of fashionable styles and high cost performance.

[0042] In summary, the process of this invention ensures consistently stable material fastness, excellent colorfastness after washing, and minimal color bleeding. This effectively addresses consumers' concerns about color bleeding during garment splicing, satisfying customers' demands for fashionable styles and high cost-effectiveness.

[0043] The above description is only a preferred embodiment of the present invention and should not be construed as a limitation of this application. All equivalent changes and modifications made in accordance with the scope of the patent application of the present invention should be covered by the present invention.

Claims

1. A production process for a brushed color-blocked nylon-spandex fabric, characterized in that: Includes the following steps: Step S1: Place the dye and dyeing auxiliaries into the vat at room temperature. First, heat the vat to 95℃-105℃ and keep it at that temperature for 30-50 minutes. Then, cool it down to 50℃ and perform soaping. Step S2: After dyeing, perform color fixing treatment. First, add acidic color fixing agent, anti-fixing stain remover and citric acid and heat from room temperature to 55-70℃. Keep it at this temperature for 30-40 minutes. After the heat is maintained, cool it down to 50 degrees and wash it twice. Step S3: Brush the fabric. When the fabric is light-colored, return it to the dyeing vat after brushing. When the fabric is black, dry it after brushing, dip and rub it once to remove water, and then return it to the dyeing vat for color fixing. When the fabric is dark or special color other than black, dry it after brushing, dip and rub it once to remove cationic color fixing, and then return it to the dyeing vat for color fixing. Step S4: Post-fixing of the fabric.

2. The production process of a brushed color-blocked nylon-spandex fabric according to claim 1, characterized in that: The dyeing auxiliaries in step S1 are a leveling agent with a concentration of 0.3-1.5 g / L and an acid-releasing agent with a concentration of 0.3-1 g / L.

3. The production process of a brushed color-blocked nylon-spandex fabric according to claim 1, characterized in that: The heating rate in step S1 is 0.5-1.5℃ / min, and the cooling rate is 1-2℃ / min.

4. The production process of a brushed color-blocked nylon-spandex fabric according to claim 1, characterized in that: In step S2, the concentration of the acidic fixing agent is 2-4% owf, the concentration of the anti-fixing stain cleaning agent is 0.3-0.5 g / L, and the concentration of citric acid is 0.3-0.5 g / L.

5. The production process of a brushed color-blocked nylon-spandex fabric according to claim 1, characterized in that: The heating rate and cooling rate in step S2 are both 1-2℃ / min.

6. The production process of a brushed color-blocked nylon-spandex fabric according to claim 1, characterized in that: In step S3, when the fabric is a dark color other than black or a special color, after brushing, it is dried and then subjected to cationic color fixing with one dip and one nibble. The fabric is then returned to the drum for further color fixing treatment. The process is as follows: after brushing, the fabric is dried at a temperature of 140-180℃ and a speed of 25m / min. After one dip and one nibble, it is subjected to cationic color fixing. The fabric is then returned to the drum, where anionic color fixing agent, anti-color stain cleaning agent, and citric acid are added. The temperature is raised from room temperature to 75-90℃ and kept at that temperature for 30-40 minutes. After the heat preservation is completed, the temperature is lowered to 50℃ and the fabric is washed twice.

7. The production process of a brushed color-blocked nylon-spandex fabric according to claim 5, characterized in that: In step 3, the concentration of the anionic fixing agent is 3-5% owf, the concentration of the anti-fixing stain remover is 0.3-0.5 g / l, the concentration of citric acid is 0.3-0.7 g / l, the heating rate from room temperature to 75-90℃ is 1-2℃ / min, and the cooling rate from room temperature to 50℃ is 1-2℃ / min.

8. The production process of a brushed color-blocked nylon-spandex fabric according to claim 1, characterized in that: In step S3, when the fabric is black, after brushing, it is dried, dipped and rolled once, and then returned to the drum for color fixing treatment. The process is further as follows: after brushing, it is dried at a temperature of 140-180℃ and a speed of 25m / min. It is dipped and rolled once, then returned to the drum, a cationic color fixing agent is added, the temperature is raised from room temperature to 40-55℃, and kept at that temperature for 20-30 minutes. After the temperature holding period, it is cooled to room temperature and washed twice. The concentration of the cationic fixing agent is 2-3% owf, the heating rate from room temperature to 40-55℃ is 1-2℃ / min, and the cooling rate from room temperature to room temperature after heat preservation is 1-2℃ / min.

9. The production process of a brushed color-blocked nylon-spandex fabric according to claim 1, characterized in that: Step S4 further involves setting the temperature to 180℃, the speed to 21m / min, and performing a dip and roll to achieve a hydrophilic feel, meeting the specifications required by the order.

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