A process for dyeing and finishing fabric with diacetate

Abstract

The application relates to the field of diacetate fabric dyeing and finishing technology, in particular to a diacetate fabric long-jen dyeing and finishing process, which comprises the following steps: S1, dipping and padding alkali-oxygen working solution and cold piling; S2, dipping and padding oxygen bleaching working solution and oxygen bleaching steaming; S3, dipping and padding dyeing working solution and baking and dyeing; and S4, post-finishing. The fabric prepared by the application has good color fastness, uniform dyeing cloth surface, soft and smooth cloth surface after finishing, good skin-friendly feeling, and low fabric loss rate. The whole dyeing and finishing process adopts long-jen treatment, thereby shortening the treatment process of diacetate fabric.

Description

A long-car dyeing and finishing process for diacetic acid fabrics Technical Field

[0001] This invention relates to the field of diacetate fabric dyeing and finishing technology, specifically to a long-car dyeing and finishing process for diacetate fabrics. Background Technology

[0002] Fiber acetate is made from cellulose fibers through acetylation with glacial acetic acid. Due to its unique physical and chemical properties, cellulose acetate is used in various fields, such as fast-moving consumer goods (cigarette filters), medical (medical gauze), industry (data cable connectors), and textiles. Textiles include ribbons, suit linings, wedding dresses, evening gowns, shirts, graduation gowns, and other men's and women's wear fabrics. Fiber acetate can also be combined with viscose filament, polyester, spandex, nylon filament, and silk to create composite yarns for weaving various men's and women's fashion apparel, formal wear, high-end sportswear, and suit fabrics. It can also be used to develop satin fabrics and woven fabrics, decorative satins, embroidery base materials, embossed silks, yarn-dyed silks, and acetate-spandex covered yarns.

[0003] Based on the different degrees to which the hydroxyl groups on the glucose residue ring of cellulose are replaced by acetyl groups, cellulose acetate is divided into two types: diacetate cellulose and triacetate cellulose. The former has a degree of esterification of 2-2.5, while the latter has a degree of esterification of 2.7-3.

[0004] Diacetate fabrics have better moisture absorption, breathability, and resilience. They do not generate static electricity or pilling, and are comfortable against the skin. Diacetate fiber filament fabrics have a luster close to that of silk and a soft, smooth feel. The fabrics are breathable and comfortable to wear. However, their dyeing and finishing processes are relatively demanding, and they are basically all done using overflow treatment. For example, CN201810349817.8 discloses a production process for diacetate fabrics. This process uses a special disperse dye immersion dyeing process and dyes the fabric in an AUUFIJ-5 overflow dyeing test machine.

[0005] In existing technologies, long-running machines are rarely used for dyeing and finishing diacetate fibers, and improper handling can easily lead to the loss of diacetate fibers. Summary of the Invention

[0006] To address the technical problem of component loss caused by existing diacetate fiber dyeing and finishing processes, this invention provides a long-process dyeing and finishing process for diacetate fabrics. This process is short, produces diacetate fabrics with virtually no component loss, and improves the quality of the fabric.

[0007] This invention provides a long-cycle dyeing and finishing process for diacetate fabrics, comprising the following steps:

[0008] S1. Impregnate with alkaline oxygen working fluid and cold stack;

[0009] S2, impregnation with oxygen bleaching working solution, oxygen bleaching steaming;

[0010] S3. Pad-in staining working solution, then bake and stain;

[0011] S4. Post-processing.

[0012] Furthermore, in step S1, the alkaline-oxygen working solution is prepared with the following concentrations of components: 10–20 g / L scouring agent, 5–10 g / L sodium hydroxide, and 10–20 g / L hydrogen peroxide. Even further, the scouring agent used is Clarite PRO, manufactured by Huntsman Polyurethanes (China) Co., Ltd.

[0013] Furthermore, in step S1, after impregnation with the alkaline oxygen working solution, the diacetic acid fabric has a liquid retention rate of 70% to 90%.

[0014] Furthermore, in step S1, the process conditions for cold stacking are as follows: stacking on a long vehicle for 15 to 20 hours at a temperature of 20 to 35°C, with no overlap between the fabric surfaces.

[0015] Furthermore, in step S2, the oxygen bleaching working solution is prepared with the following concentrations of components: 15–25 g / L scouring agent, 10–20 g / L hydrogen peroxide, and 2.5–5.0 g / L sodium hydroxide; the pH of the oxygen bleaching working solution is adjusted to 10–11. Even further, the scouring agent used is Clarite PRO, manufactured by Huntsman Polyurethanes (China) Co., Ltd.

[0016] Furthermore, in step S2, after immersion in the oxygen bleaching working solution, the diacetic acid fabric has a liquid retention rate of 70% to 90%.

[0017] Furthermore, in step S2, the oxygen bleaching steaming process conditions are: long-run steaming, steaming temperature of 100-102℃, and steaming time of 30-40min.

[0018] Furthermore, in step S3, the dyeing working solution is a disperse dye working solution.

[0019] Furthermore, in step S3, after padding with the dyeing working solution, the diacetic acid fabric has a liquid retention rate of 50% to 70%.

[0020] Furthermore, in step S3, the baking and dyeing temperature is 200–215°C, and the baking time is 1.5–5 min.

[0021] The beneficial effects of this invention are that the long-car dyeing and finishing process for diacetate fabrics provided by this invention produces fabrics with good color fastness, uniform dyeing surface, soft and smooth hand feel, good skin-friendly feel, and low fabric loss rate. The entire dyeing and finishing process of this invention uses long-car processing, shortening the processing steps for diacetate fabrics. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0023] Example 1

[0024] A long-cycle dyeing and finishing process for diacetate fabrics includes the following steps:

[0025] (1) Impregnate with alkaline oxygen working fluid and cold stack.

[0026] The alkaline oxygen working solution is prepared with the following components at the following concentrations: Clarite PRO (Hunsman Polyurethanes (China) Co., Ltd.) 12g / L, sodium hydroxide 5g / L, hydrogen peroxide (100%) 15g / L;

[0027] The specific process is as follows: diacetic acid fabric is impregnated with alkaline oxygen working solution (100% pick-up rate, fabric liquid retention rate of 70% to 90%) → stacked on a long machine at 30℃ for 16 hours, with no overlap between fabric surfaces → 95℃ hot water wash → 95℃ hot water wash (adding soap detergent Ultravon CX (Hunsmay Polyurethane (China) Co., Ltd.) 1g / L) → 50℃ water wash.

[0028] (2) Impregnate with oxygen bleaching working solution, and steam the oxygen bleaching solution.

[0029] The oxygen bleaching working solution is prepared with the following components at the following concentrations: 15 g / L of scouring agent Clarite PRO (Hunsman Polyurethanes (China) Co., Ltd.), 2.5 g / L of sodium hydroxide, and 15 g / L of hydrogen peroxide (100%). The pH of the oxygen bleaching working solution is adjusted to 10-11.

[0030] The specific process is as follows: impregnation with oxygen bleach working solution (100% pick-up rate, fabric liquid retention rate of 70% to 90%) → steaming at 102℃ for 30 minutes → hot water washing at 95℃ → water washing at 50℃ → water washing at 30℃ → water washing at 60℃ (adjust pH value to 4-5 with acetic acid to neutralize fabric surface) → water washing → drying (130℃).

[0031] (3) Pad-dyeing working solution, using disperse dye, followed by baking and dyeing.

[0032] The oxygen bleaching working solution was prepared with the following concentrations of components: TERASIL Yellow 4G (Huntsman Polyurethanes (China) Co., Ltd.) 5.7 g / L, TERASIL Red 3BL-01 150% (Huntsman Polyurethanes (China) Co., Ltd.) 5.6 g / L, TERASIL Blue 3RL-02 150% (Huntsman Polyurethanes (China) Co., Ltd.) 46 g / L, and anti-migration agent TX (Koke) 10 g / L.

[0033] The specific process is as follows: pad-dyeing working solution (diacetic acid fabric liquid coverage rate is 50%~70%) → pre-drying at 80℃ → baking at 205℃ for 90 seconds → soaping at 85℃ for 15 minutes (soaping agent is ERIOPON E3-SAVE (Hunsmay Polyurethane (China) Co., Ltd.) 3g / L) → water washing at 30℃ → drying at 130℃.

[0034] (4) Post-processing

[0035] The finishing working solution was prepared according to the following concentrations: 8807 (Binzhou Maipus Environmental Protection Technology Co., Ltd.) 42.5g / L, 6970N (Suzhou Liansheng Chemical Co., Ltd.) 17.5g / L, and 8780 (Wuxi Kailai Chemical Technology Co., Ltd.) 20g / L.

[0036] The specific process is as follows: impregnation with finishing solution (70% roll-off rate) → drying at 130℃.

[0037] Example 2

[0038] A long-cycle dyeing and finishing process for diacetate fabrics includes the following steps:

[0039] (1) Impregnate with alkaline oxygen working fluid and cold stack.

[0040] The alkaline oxygen working solution is prepared with the following components at the following concentrations: Clarite PRO (Hunsman Polyurethanes (China) Co., Ltd.) 10g / L, sodium hydroxide 8g / L, hydrogen peroxide (100%) 10g / L;

[0041] The specific process is as follows: padding with alkaline oxygen working solution (100% padding rate, fabric liquid retention rate of 70% to 90%) → stacking on a long machine at 20℃ for 20 hours → washing with hot water at 95℃ → washing with hot water at 95℃ (adding 1g / L of soaping agent Ultravon CX (Hunsmay Polyurethanes (China) Co., Ltd.)) → washing with water at 50℃.

[0042] (2) Impregnate with oxygen bleaching working solution, and steam the oxygen bleaching solution.

[0043] The oxygen bleaching working solution is prepared with the following concentrations of ingredients: 20 g / L of scouring agent Clarite PRO (Hunsman Polyurethanes (China) Co., Ltd.), 3.0 g / L of sodium hydroxide, and 10 g / L of hydrogen peroxide (100%). The pH of the oxygen bleaching working solution is adjusted to 10-11.

[0044] The specific process is as follows: impregnation with oxygen bleach working solution (100% pick-up rate, fabric liquid retention rate of 70% to 90%) → steaming at 100℃ for 40 minutes → hot water washing at 95℃ → water washing at 50℃ → water washing at 30℃ → water washing at 60℃ (adjust pH value to 4-5 with acetic acid to neutralize fabric surface) → water washing → drying (130℃).

[0045] (3) Pad-dyeing working solution, using disperse dye, followed by baking and dyeing.

[0046] The oxygen bleaching working solution is prepared according to the following concentrations: TERASIL Yellow 4G (Huntsman Polyurethanes (China) Co., Ltd.) 2.0 g / L, TERASIL Red 3BL-01 150% (Huntsman Polyurethanes (China) Co., Ltd.) 2.6 g / L, TERASIL Blue 3RL-02 150% (Huntsman Polyurethanes (China) Co., Ltd.) 2.5 g / L, and anti-migration agent TX (Koke) 10 g / L.

[0047] The specific process is as follows: pad-dyeing working solution (diacetic acid fabric liquid coverage rate is 50%~70%) → pre-drying at 80℃ → baking at 200℃ for 2 minutes → soaping at 85℃ for 15 minutes (soaping agent is ERIOPON E3-SAVE (Hunsmay Polyurethane (China) Co., Ltd.) 3g / L) → water washing at 30℃ → drying at 130℃.

[0048] (4) Post-processing

[0049] The finishing working solution was prepared according to the following concentrations: 8807 (Binzhou Maipus Environmental Protection Technology Co., Ltd.) 42.5g / L, 6970N (Suzhou Liansheng Chemical Co., Ltd.) 17.5g / L, and 8780 (Wuxi Kailai Chemical Technology Co., Ltd.) 20g / L.

[0050] The specific process is as follows: impregnation with finishing solution (70% roll-off rate) → drying at 130℃.

[0051] Example 3

[0052] A long-cycle dyeing and finishing process for diacetate fabrics includes the following steps:

[0053] (1) Impregnate with alkaline oxygen working fluid and cold stack.

[0054] The alkaline oxygen working solution is prepared with the following components at the following concentrations: Clarite PRO (Hunsman Polyurethanes (China) Co., Ltd.) 18g / L, sodium hydroxide 10g / L, hydrogen peroxide (100%) 15g / L;

[0055] The specific process is as follows: padding with alkaline oxygen working solution (100% padding rate, fabric liquid retention rate of 70% to 90%) → stacking on a long machine at 20℃ for 15 hours → washing with hot water at 95℃ → washing with hot water at 95℃ (adding 1g / L of soaping agent Ultravon CX (Hunsmay Polyurethanes (China) Co., Ltd.)) → washing with water at 50℃.

[0056] (2) Impregnate with oxygen bleaching working solution, and steam the oxygen bleaching solution.

[0057] The oxygen bleaching working solution is prepared with the following concentrations of ingredients: 25 g / L of scouring agent Clarite PRO (Hunsman Polyurethanes (China) Co., Ltd.), 5.0 g / L of sodium hydroxide, and 20 g / L of hydrogen peroxide (100%). The pH of the oxygen bleaching working solution is adjusted to 10-11.

[0058] The specific process is as follows: impregnation with oxygen bleach working solution (100% pick-up rate, fabric liquid retention rate of 70% to 90%) → steaming at 102℃ for 30 minutes → hot water washing at 95℃ → water washing at 50℃ → water washing at 30℃ → water washing at 60℃ (adjust pH value to 4-5 with acetic acid to neutralize fabric surface) → water washing → drying (130℃).

[0059] (3) Pad-dyeing working solution, using disperse dye, followed by baking and dyeing.

[0060] The oxygen bleaching working solution is prepared according to the following concentrations: TERASIL Yellow 4G (Huntsman Polyurethanes (China) Co., Ltd.) 2.0 g / L, TERASIL Red 3BL-01 150% (Huntsman Polyurethanes (China) Co., Ltd.) 2.6 g / L, TERASIL Blue 3RL-02 150% (Huntsman Polyurethanes (China) Co., Ltd.) 2.5 g / L, and anti-migration agent TX (Koke) 10 g / L.

[0061] The specific process is as follows: pad-dyeing working solution (diacetic acid fabric liquid coverage rate is 50%~70%) → pre-drying at 80℃ → baking at 215℃ for 1.5min → soaping at 85℃ for 15min (soaping agent is ERIOPONE 3-SAVE (Hunsmay Polyurethane (China) Co., Ltd.) 3g / L) → water washing at 30℃ → drying at 130℃.

[0062] (4) Post-processing

[0063] The finishing working solution was prepared according to the following concentrations: 8807 (Binzhou Maipus Environmental Protection Technology Co., Ltd.) 42.5g / L, 6970N (Suzhou Liansheng Chemical Co., Ltd.) 17.5g / L, and 8780 (Wuxi Kailai Chemical Technology Co., Ltd.) 20g / L.

[0064] The specific process is as follows: impregnation with finishing solution (70% roll-off rate) → drying at 130℃.

[0065] Table 1 shows the fastness test data of the finished fabric obtained in the examples. Table 2 shows the fabric weight loss rate after oxygen bleaching and steaming following the long-term dyeing and finishing treatment of the fabric in the examples.

[0066] Table 1. Fastness test data of the finished fabric obtained in the example.

[0067]

[0068]

[0069] Table 2. Fabric weight loss rate after oxygen bleaching and steaming following long-car dyeing and finishing treatment in the examples.

[0070] Project Loss Rate (%) Example 1 6% Example 2 6% Example 3 7% surface

[0071] As can be seen from Tables 1 and 2, the fabric treated with the long-run dyeing and finishing process of the present invention exhibits good color fastness, uniform dyeing, a soft and smooth hand feel, good skin-friendliness, and low fabric loss rate. The entire process employs long-run dyeing and finishing, shortening the processing steps for diacetate fabrics.

[0072] Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be covered within the protection scope of the present invention.

Claims

1. A long-cycle dyeing and finishing process for diacetate fabrics, characterized in that, The process includes the following steps: S1, padding with alkaline-oxygen working solution and cold stacking; S2, padding with oxygen bleaching working solution and oxygen bleaching steaming; S3, padding with dyeing working solution and baking dyeing; S4, finishing; In step S1, the alkaline-oxygen working solution is prepared according to the following concentrations: scouring agent 10~20g / L, sodium hydroxide 5~10g / L, hydrogen peroxide 10~20g / L; In step S1, the cold stacking process conditions are: long-term stacking at a temperature of 20~35℃ for 15~20h, with no overlap between fabric surfaces; In step S1, after padding with the alkaline-oxygen working solution, the diacetate fabric has a liquid retention rate of 70%~90%; In step S2, the oxygen bleaching working solution is prepared according to... The following components are prepared at a lower concentration: scouring agent 15-25 g / L, hydrogen peroxide 10-20 g / L, sodium hydroxide 2.5-5.0 g / L; adjust the pH of the oxygen bleaching working solution to 10-11; in step S2, the oxygen bleaching steaming process conditions are: long steaming, steaming temperature 100-102℃, steaming time 30-40 min; in step S2, after padding with the oxygen bleaching working solution, the diacetate fabric has a liquid retention rate of 70%-90%; in step S3, the baking and dyeing temperature is 200-215℃, baking time is 1.5-5 min; in step S3, after padding with the dyeing working solution, the diacetate fabric has a liquid retention rate of 50%-70%.

2. The long-wheel dyeing and finishing process for diacetate fabrics as described in claim 1, characterized in that, In step S3, the dyeing working solution is a disperse dye working solution.

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