Fancy yarn and production process thereof

Abstract

The invention belongs to the technical field of spinning, and particularly relates to fancy yarn and a production process thereof. Comprising the following steps: preparing a caustic soda solution: uniformly mixing caustic soda, a mercerizing penetrating agent and water to prepare the caustic soda solution; local mercerizing of the yarns: putting the yarns into a mercerizing device, enabling local positions of the yarns to absorb the caustic soda solution in a saturated manner, and realizing point-shaped or section-shaped mercerizing of local fibers of the yarns; winding the yarns into loose cone yarns; washing to adjust pH: putting the slack cone yarn into a cone yarn dyeing machine to carry out high-temperature washing, and carrying out acid washing to adjust the pH after washing; cheese yarn dyeing, wherein the yarn with the adjusted pH value is dyed to achieve production of fancy yarn; according to the method, the characteristic that mercerized cotton fibers and non-mercerized cotton fibers are different in dye adsorption and dyeing during one-bath dyeing is utilized, the dyeing effects of different depths can be achieved on one yarn, boiling and bleaching pretreatment is not needed before yarn dyeing, the production efficiency is high, and industrial production is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles, and in particular relates to fancy yarn and a production process thereof. Background Art

[0002] As people's living standards continue to improve, they have new demands for fabrics. Fancy yarns, with their unique changes in yarn color, bring diverse and distinctive appearance effects to fabrics, cater to people's pursuit of fashion and individuality in dressing, meet the ever-changing market needs, and have broad development prospects. The main production methods of fancy yarns include interval dyeing, jet dyeing, differential dyeing, color spinning, etc.

[0003] Patent CN106245316A provides a process for spray-dyeing cashmere colored yarns, which is to perform pre-treatment of the cashmere yarns by boiling and bleaching, and then the dyeing liquid spraying unit sprays the dyeing liquid to the base fabric and multiple cashmere yarns arranged in parallel attached to the base fabric through the nozzle, and then winds them into skeins and fixes the colors. The skein processing technology is relatively complicated, and it takes a lot of manpower and time to wind the dyed skeins into cones.

[0004] Patent CN112430875A provides a fancy yarn and a preparation method thereof, which includes the following steps: cleaning, carding, drawing, roving, spun yarn, dyeing, and doubling and twisting. The yarn produced by this method can be dyed in different colors according to needs. The color flexibility of the fancy yarn is greater, which is significantly different from the color spun yarn. However, the production process of this process is longer and the production process is more complicated. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a fancy colored yarn, which utilizes the difference in the adsorption of dyes between mercerized and unmercerized cotton fibers when dyed in the same bath, so as to achieve different shades of dyeing effects on one yarn, with a strong sense of layering and three-dimensionality.

[0006] The invention also provides a production process thereof, which is convenient to operate, simple in process and suitable for large-scale production.

[0007] The production process of the fancy yarn of the present invention comprises the following steps: (1) Preparation of caustic soda solution: Mix caustic soda, mercerizing penetrant and water evenly to prepare caustic soda solution; (2) Local mercerization of yarn: The yarn is placed in a mercerizing device to saturate the local position of the yarn with caustic soda solution, so as to achieve point-shaped or segment-shaped mercerization of the local fibers of the yarn, and the yarn is wound into a loose cone yarn; (3) Washing and adjusting pH: Put the loose yarn into the yarn dyeing machine for washing, and then acid wash to adjust pH; (4) Dyeing of bobbins: Dyeing the yarn after adjusting the pH value to realize the production of fancy yarn; the schematic diagram of the fancy yarn in the present invention is as follows Figure 1 , Figure 2 As shown; The concentration of the mercerizing penetrant in step (1) is 0.5-1 wt.%.

[0008] The concentration of the caustic soda solution prepared in step (1) is 21 to 30 degrees Baume.

[0009] The yarn in step (2) is pure cotton yarn or blended cotton yarn.

[0010] The mercerizing device in step (2) is the equipment of patent CN111005171A or patent CN113463308A. The device of patent CN111005171A is used to perform point mercerizing on local fibers of the yarn, and the device of patent CN113463308A is used to perform segment mercerizing on local fibers of the yarn.

[0011] In step (2), the loose bobbin yarn is wound to control the density of the bobbin yarn to be 0.33-0.45 g / cm 3 .

[0012] The water washing temperature in step (3) is 75-90°C and the washing time is 15-20 minutes.

[0013] The acid used for adjusting the pH by pickling in step (3) is acetic acid, the temperature is 40-55° C., the time is 15-20 min, and the pH after pickling is 6.5-8.

[0014] The dyeing in step (4) is carried out by using reactive dyes.

[0015] After the dyeing process in step (4) is completed, soaping, washing and drying processes are carried out.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The yarn of the present invention has different effects from space-dyed yarn and colored spun yarn. The colored yarn produced presents different shades of dyeing effects on one yarn. The woven fabric has a strong sense of layering and three-dimensionality, and a richer visual style, which meets the market demand for individuality and fashion and has broad development prospects.

[0017] (2) The process method of the present invention has the advantages of easy operation and simple process. It utilizes the difference in the adsorption of dyes by mercerized and unmercerized cotton fibers when dyed in the same bath to achieve different shades of dyeing effects on a yarn. The yarn does not need to be bleached or scalded before dyeing, and the production efficiency is high, which is conducive to industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the dot-shaped colored yarn produced in Example 1 of the present invention; Figure 2 This is a schematic diagram of the segmented colored yarn produced in Example 2 of the present invention.

[0019] Among them, 1. dark color; 2. light color. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Unless otherwise specified, all raw materials used in the examples are commercially available.

[0022] Mercerizing penetrant MA-QC was purchased from Zibo Lurui Fine Chemical Co., Ltd.; Acetic acid-65 was purchased from Jiangsu Meide Chemical Co., Ltd.; Active blue-B-4R was purchased from Huntsman Chemical Trading (Shanghai) Co., Ltd.; Reactive Yellow-K-3BS 150% was purchased from Kyungin Trading Co., Ltd., South Korea; Reactive Blue-B BRF 150% was purchased from Sumitomo Chemical Co., Ltd.

[0023] Example 1 The production process of the fancy yarn comprises the following steps: (1) Preparation of caustic soda solution: caustic soda, mercerizing penetrant MA-QC and water are mixed evenly to prepare a caustic soda solution. The amount of mercerizing penetrant MA-QC is 1wt.%, and the concentration of the caustic soda solution is 24 degrees Baume. (2) Partial mercerization of yarn: Using the equipment with patent CN111005171A, add the caustic soda solution prepared in step (1) into the dyeing tank of the equipment, start the equipment to make the 50-ne cotton yarn partially saturated with the caustic soda solution, achieve local fiber point mercerization of the yarn, and wind it into loose cone yarn. The density of the loose cone yarn is 0.38g / cm 3 ; (3) Washing and adjusting pH: put the loose yarn into the yarn dyeing machine for high-temperature washing at 80°C for 15 min. After washing, use 65wt.% acetic acid for acid washing at 50°C for 15 min to adjust the pH of the yarn to 7; (4) Dyeing of bobbins: Dye the bobbins with adjusted pH using reactive dyes such as Reactive Blue-B-4R (owf2%), sodium sulfate (50g / L), and soda ash (20g / L). The dyeing temperature is 60°C and the dyeing time is 40 minutes. The dyed yarn is soaped, washed, and dried to achieve the production of fancy yarn. Figure 1 As shown, the dark color 1 is the dotted area after mercerization, and the light color 2 is the unmercerized area. The fiber structure changes after mercerization, and after subsequent dyeing, the color is darker than the unmercerized area.

[0024] Example 2 The production process of the fancy yarn comprises the following steps: (1) Preparation of caustic soda solution: caustic soda, mercerizing penetrant MA-QC and water are mixed evenly to prepare a caustic soda solution. The amount of mercerizing penetrant MA-QC is 1wt.%, and the concentration of the caustic soda solution is 30 degrees Baume. (2) Partial mercerization of yarn: using the equipment with application publication number CN 113463308 A, add the caustic soda solution prepared in step (1) into the dyeing liquid tank of the equipment, start the equipment to make the 80-ne plied pure cotton yarn partially saturated with the caustic soda solution, achieve partial fiber segment mercerization of the yarn, and wind it into loose cone yarn. The density of the loose cone yarn is 0.45 g / cm 3 ; (3) Washing and pH adjustment: put the loose yarn into the yarn dyeing machine for high-temperature washing at 90°C for 20 min. After washing, use 65wt.% acetic acid for acid washing at 55°C for 20 min to adjust the pH of the yarn to 8; (4) Dyeing of bobbins: Dye the bobbins with adjusted pH value. Use reactive dyes such as Reactive Yellow-K-3BS150% (owf3%), sodium sulfate (50g / L), and soda ash (20g / L) for dyeing. The dyeing temperature is 60℃ and the dyeing time is 40min. Soap-wash, wash and dry the dyed yarn to realize the production of fancy yarn. Figure 2 As shown, the dark color 1 is the segmented area after mercerization, and the light color 2 is the unmercerized area. The fiber structure changes after mercerization, and after subsequent dyeing, the color is darker than the unmercerized area.

[0025] Example 3 The production process of the fancy yarn comprises the following steps: (1) Preparation of caustic soda solution: caustic soda, mercerizing penetrant MA-QC and water are mixed evenly to prepare a caustic soda solution. The amount of mercerizing penetrant MA-QC is 0.5wt.%, and the concentration of the caustic soda solution is 21 degrees Baume. (2) Local mercerization of yarn: using the equipment with application publication number CN 111005171 A, add the caustic soda solution prepared in step (1) into the dyeing tank of the equipment, start the equipment to make the local position of the CVC60 Ne yarn saturated with the caustic soda solution, realize the local fiber point mercerization of the yarn, and wind it into loose cone yarn. The density of the loose cone yarn is 0.33g / cm 3 ; (3) Washing and adjusting pH: put the loose yarn into the yarn dyeing machine for high-temperature washing at 75°C for 15 min. After washing, use 65wt.% acetic acid for acid washing at 40°C for 15 min to adjust the pH of the yarn to 6.5; (4) Dyeing of bobbins: Dye the bobbins with adjusted pH value using reactive dyes such as Reactive Blue-B BRF150% (owf2%), sodium sulfate (50g / L), and soda ash (20g / L) at a temperature of 60°C for 40 minutes. Soap-wash, wash, and dry the dyed yarn to achieve the production of fancy yarn. Figure 1 As shown, the dark color 1 is the dotted area after mercerization, and the light color 2 is the unmercerized area. The fiber structure changes after mercerization, and after subsequent dyeing, the color is darker than the unmercerized area.

Claims

1. A production process for fancy yarn, characterized in that: The following steps are involved: (1) Preparation of caustic soda solution: Mix caustic soda, mercerizing penetrant and water evenly to prepare caustic soda solution; (2) Local mercerization of yarn: The yarn is placed in a mercerizing device to saturate the local position of the yarn with caustic soda solution, so as to achieve point-shaped or segment-shaped mercerization of the local fibers of the yarn, and the yarn is wound into a loose cone yarn; (3) Washing and adjusting pH: Put the loose yarn into the yarn dyeing machine for washing, and then acid wash to adjust pH; (4) Cone yarn dyeing: The yarn with adjusted pH is dyed to achieve the production of fancy yarn.

2. The production process of colored yarn according to claim 1, characterized in that: The concentration of the caustic soda solution in step (1) is 21 to 30 degrees Baume.

3. The production process of colored yarn according to claim 1, characterized in that: The concentration of the mercerizing penetrant in the caustic soda solution in step (1) is 0.5-1 wt.%.

4. The production process of colored yarn according to claim 1, characterized in that: The yarn in step (2) is pure cotton yarn or blended cotton yarn.

5. The production process of colored yarn according to claim 1, characterized in that: In step (2), the loose bobbin yarn is wound to control the density of the bobbin yarn to be 0.33-0.45 g / cm 3 .

6. The production process of colored yarn according to claim 1, characterized in that: The water washing temperature in step (3) is 75-90°C and the washing time is 15-20 minutes.

7. The production process of colored yarn according to claim 1, characterized in that: The acid used for adjusting the pH by pickling in step (3) is acetic acid, the temperature is 40-55° C., the time is 15-20 min, and the pH after pickling is 6.5-8.

8. The production process of colored yarn according to claim 1, characterized in that: The dyeing in step (4) is carried out by using reactive dyes.

9. The production process of fancy yarn according to claim 1, characterized in that: After the dyeing process in step (4) is completed, soaping, washing and drying processes are carried out.

10. A fancy yarn, characterized in that: The product is produced by the production process described in any one of claims 1 to 9.

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