Alkali-free and salt-free dyeing method of seaweed fiber blended yarn and its application

Abstract

The present invention belongs to the technical field of textile dyeing, and specifically relates to an alkali-free and salt-free dyeing method for seaweed fiber blended fiber yarn and its application. The method comprises the following steps: (1) dye liquor preparation: taking active dye, penetrant, moisturizer and water and mixing them evenly to obtain dye liquor; (2) cheese yarn online dyeing: pouring dye liquor into a dyeing tank, dyeing at the same time during the winding process, the yarn passes through a dyeing device to make the dye liquor penetrate into the yarn and reach a saturated state, and at the same time, the dyed yarn is wound on a loose bobbin to generate a loose cheese yarn; (3) cheese yarn moisture fixation: using saturated steam to fix the dyed loose cheese yarn; (4) cheese yarn post-treatment; The present invention realizes the dyeing of active dyes in an alkali-free and salt-free state through the comprehensive application of reverse osmosis water, nicotinic acid-based active dyes, online yarn dyeing, and high-temperature moisture fixation, fundamentally avoiding the irreversible damage of seaweed fiber to salt, alkali and sodium ions in water during the dyeing process.

Description

Technical Field

[0001] The invention belongs to the technical field of textile dyeing, and in particular relates to an alkali-free and salt-free dyeing method for seaweed fiber blended fiber yarn and application thereof. Background Art

[0002] Seaweed fiber is a new type of biodegradable synthetic fiber, and its raw material comes from natural sodium alginate contained in algae plants in the ocean. This type of fiber not only has good water solubility and biocompatibility, but also has low heat, non-toxicity and biodegradability. It has been widely used in biomedicine, textile printing and dyeing, food industry, beauty cosmetics and other fields.

[0003] Seaweed fiber is difficult to be spun alone during the spinning process, and must be blended with other fibers to form yarn. The current maximum content of the yarn does not exceed 50%. Seaweed fiber is prone to ion exchange between the fiber and the solution in a solution containing inorganic or organic sodium salts, which causes the fiber to gel and even completely dissolve in water, causing it to lose the properties of a textile fiber. Alkali, inorganic or organic sodium salts are dyeing auxiliaries that must be added to traditional dyes during the dyeing process, so seaweed fiber has not been able to be dyed using traditional dyeing processes, limiting its application in the field of clothing fabrics.

[0004] Chinese patent CN 105970528 B discloses a seaweed fiber dyeing process, including: (1) high-temperature vacuum steaming; (2) cold-pressed stacking and low-temperature dyeing; (3) open-width water washing and shaping. The specific steps are: put the seaweed fiber into a steamer, evacuate the steamer to 1.5 atmospheres, input 100°C steam, maintain for 30-60 minutes, and cool the seaweed fiber to room temperature after the steaming is completed. After dyeing, the seaweed fiber is pre-treated and dyed. During dyeing, the pH of the dye solution is 7.0, the dyeing pressure is 2-3 atmospheres, the temperature is 20-50°C, and the time is 1-2 seconds. The dyed seaweed fiber is stacked for 12 hours, washed with 20-50°C water for 20-30 minutes, and then dried. This dyeing process is relatively complicated, time-consuming and inefficient.

[0005] Chinese patent CN 103981744 B discloses a salt-free dyeing method for calcium alginate fibers, wherein the calcium alginate fibers to be dyed are pretreated with an aqueous solution of aluminum sulfate, then salt-free dyeing is performed with a direct dye, and finally a color fixing treatment is performed with an aqueous solution of calcium chloride.

[0006] Chinese patent CN 110318269 A discloses a salt-free and alkali-free seaweed fiber cationic viscose fabric and a production method, the fabric includes seaweed fiber, cationic viscose fiber and a third component fiber; the method includes pretreatment, dyeing, soaping and finishing. Through the multi-component fabric design, the dyeing characteristics of cationic viscose fiber without salt and alkali are utilized to achieve the dyeing of seaweed fiber fabric under salt-free and alkali-free conditions, but the dye only colors the cationic viscose fiber, and does not color the seaweed fiber or the third component fiber.

[0007] Although the method involved in the above patent can also achieve seaweed fiber dyeing, the seaweed fiber must be treated in advance, and the treatment process will generate energy consumption and wastewater, which increases the dyeing cost and also has a certain impact on the environment. Summary of the invention

[0008] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an alkali-free and salt-free dyeing method for seaweed fiber blended yarn, which does not require pretreatment of the seaweed fiber blended yarn, makes the dyeing process green and environmentally friendly, and reduces the dyeing cost.

[0009] The present invention also provides applications thereof.

[0010] The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn of the present invention comprises the following steps:

[0011] (1) Dye solution preparation

[0012] Take the active dye, penetrant, hygroscopic agent and water and mix them evenly to obtain the dye solution;

[0013] (2) Online dyeing of cheese yarn

[0014] Pour dyeing liquid into the dyeing tank of the winding machine with a cheese yarn dyeing device, dyeing is performed simultaneously during the winding process, the yarn passes through the dyeing device so that the dyeing liquid penetrates into the yarn and reaches a saturated state, and at the same time, the dyed yarn is wound on a loose bobbin to generate a loose cheese yarn;

[0015] (3) Cheese damp-fast color

[0016] Use saturated steam to fix the dyed loose cheese yarn;

[0017] (4) Post-processing of cheese yarn

[0018] The loose cheese yarn after step (3) is subjected to the following steps:

[0019] Soap wash → hot water wash → cold water wash → drying;

[0020] in:

[0021] The water used in the alkali-free and salt-free dyeing method of the seaweed fiber blended fiber yarn is recycled water that has been treated with reverse osmosis;

[0022] The total salt content of the reclaimed water is ≤100 mg / L.

[0023] The reactive dye is a nicotinic acid-based reactive dye, that is, an R-type reactive dye.

[0024] In step (1), the dosage of the reactive dye is 0.1-6% of the total mass of the dye liquor; the dosage of the penetrant is 0-8 g / L; and the dosage of the hygroscopic agent is 2-8 g / L.

[0025] The penetrant in step (1) is a nonionic surfactant, preferably WA-M produced by Zibo Lurui Fine Chemical Co., Ltd.

[0026] The desiccant in step (1) is fatty alcohol polyoxyethylene ether, preferably Sinvadine L-635 produced by Kunshan Mingjia Additive Co., Ltd.

[0027] The speed of the winding process described in step (2) is 500-900m / min.

[0028] The loose cheese yarn forming density in step (2) is 0.33-0.42 g / cm 3 .

[0029] In step (3), the fixing temperature is 100-110° C., the fixing pressure is 0.1-0.2 MPa, and the fixing time is 20-50 min.

[0030] The soaping process of step (4) is 1-5 g / L of soaping agent, 90-100°C, and 10-50 min of soaping time; the hot water washing process is 90-100°C, and 10-50 min of hot water washing time; the cold water washing process is 15 min of normal temperature water washing. The soaping agent is preferably WO produced by Zibo Lurui Fine Chemical Co., Ltd.

[0031] The alkali-free and salt-free dyeing method of the seaweed fiber blended fiber yarn of the present invention is applied to the salt-free and alkali-free dyeing of the seaweed fiber blended fiber, and the blending mass ratio of the seaweed fiber to other fibers in the seaweed fiber blended fiber is (10-50%): (90-50%). Other fibers include but are not limited to cotton fibers, viscose fibers, tencel fibers, etc., and the yarn specifications are 20-80s.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The dyeing process of the present invention can achieve the goal of not pre-treating or modifying the dye or yarn, and not adding alkali and salt during the dyeing process; the dye liquor can be fully utilized, greatly reducing the amount of dyeing water and the amount of auxiliaries used, reducing the discharge of high-salt and high-alkali wastewater during the dyeing process, and alleviating the pressure on dyeing wastewater treatment.

[0034] (2) The present invention realizes the dyeing of reactive dyes in an alkali-free and salt-free state through the comprehensive application of reverse osmosis water, nicotinic acid-based reactive dyes, online yarn dyeing, and high-temperature moisture fixation, thereby fundamentally avoiding the irreversible damage to seaweed fibers caused by salt, alkali and sodium ions in water during the dyeing process.

[0035] (3) The preparation method of the present invention has the advantages of simple operation, short dyeing process, high dyeing rate, and green and environmentally friendly dyeing process. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with embodiments, but the protection scope of the present invention is not limited thereto.

[0037] The penetrant WA-M and soaping agent WO used in the examples were purchased from Zibo Lurui Fine Chemical Co., Ltd., and the dyes were purchased from Qingdao Airui Dyeing and Chemical Co., Ltd. The hygroscopic agent used was Sinvadine L-635 produced by Kunshan Mingjia Auxiliary Co., Ltd.

[0038] Unless otherwise specified, all raw materials used in the examples are commercially available.

[0039] Example 1

[0040] (1) Dye solution preparation

[0041] Take the mass concentration of R-type reactive dye to be 6%, the mass ratio of BLUE TC-BEN, RED TD-REN and YELLOW TC-BEN to be 65:19:16, the penetrant WA-M to be 8g / L, the desiccant to be 2g / L, and mix them evenly to obtain the dye solution. The water is the middle water with a total salt content of 10mg / L after reverse osmosis treatment.

[0042] (2) Online dyeing of cheese yarn

[0043] The dye solution was poured into the dyeing tank of the winding machine with a cheese yarn dyeing device, and the 21s seaweed fiber / viscose fiber (30 / 70) blended yarn was wound and dyed at the same time. The speed was 500m / min. The yarn passed through the dyeing device to make the dye solution penetrate into the yarn and reach a saturated state. At the same time, the dyed yarn was wound on a loose bobbin to generate a loose cheese yarn. The dyed yarn was blue and the forming density of the loose cheese yarn was 0.36g / cm 3 ;

[0044] (3) Cheese damp-fast color

[0045] The dyed loose cheese yarn was fixed with saturated steam; the fixing temperature was 100°C, the fixing pressure was 0.1 MPa, and the fixing time was 30 min. The water was the reverse osmosis treated recycled water with a total salt content of 10 mg / L.

[0046] (4) Post-processing of cheese yarn

[0047] The loose cheese yarn treated in step (3) is subjected to the following process: the water is the reverse osmosis treated reclaimed water with a total salt content of 10 mg / L.

[0048] Soap wash → hot water wash → cold water wash → drying;

[0049] Soap washing: soap washing agent WO2g / L, temperature is 95℃, time is 10min;

[0050] Hot water washing: temperature is 90℃, time is 50min;

[0051] Cold water washing: Wash with normal temperature water for 15 minutes;

[0052] Drying: temperature is 80℃, time is 120 minutes.

[0053] Example 2

[0054] (1) Dye solution preparation

[0055] Take the mass concentration of R-type reactive dye to be 2%, the mass ratio of BLUE TC-BEN, RED TD-REN and YELLOW TC-BEN to be 2:3:15, the penetrant WA-M to be 3g / L, the desiccant to be 3g / L, and mix them evenly to obtain the dye solution. The water is the middle water with a total salt content of 50mg / L after reverse osmosis treatment.

[0056] (2) Online dyeing of cheese yarn

[0057] The dye solution was poured into the dyeing tank of the winding machine with a cheese yarn dyeing device, and the 60s seaweed fiber / cotton fiber (50 / 50) blended yarn was wound and dyed at the same time. The speed was 700m / min. The yarn passed through the dyeing device to make the dye solution penetrate into the yarn and reach a saturated state. At the same time, the dyed yarn was wound on a loose bobbin to generate a loose cheese yarn. The dyed yarn was yellow-brown and the forming density of the loose cheese yarn was 0.33g / cm 3 ;

[0058] (3) Cheese damp-fast color

[0059] The dyed loose cheese yarn was fixed with saturated steam; the fixing temperature was 110°C, the fixing pressure was 0.2 MPa, and the fixing time was 20 min. The water was the reverse osmosis treated recycled water with a total salt content of 50 mg / L.

[0060] (4) Post-processing of cheese yarn

[0061] The loose cheese yarn treated in step (3) is subjected to the following process: the water is the reverse osmosis treated reclaimed water with a total salt content of 50 mg / L.

[0062] Soap wash → hot water wash → cold water wash → drying;

[0063] Soap washing: soap washing agent WO1g / L, temperature is 90℃, time is 20min;

[0064] Hot water washing: temperature is 95℃, time is 30min;

[0065] Cold water washing: Wash with normal temperature water for 15 minutes;

[0066] Drying: temperature is 80℃, time is 120 minutes.

[0067] Example 3

[0068] (1) Dye solution preparation

[0069] Take the mass concentration of R-type reactive dye to be 0.3%, the mass ratio of RED TD-REN and YELLOW TC-BEN to be 7:13, the penetrant WA-M to be 0g / L, the moisture absorbent to be 8g / L, and mix them evenly to obtain the dye solution. The water is the middle water with a total salt content of 80mg / L after reverse osmosis treatment.

[0070] (2) Online dyeing of cheese yarn

[0071] The dye solution was poured into the dyeing tank of the winding machine with a cheese yarn dyeing device, and the 80s seaweed fiber / Tencel fiber (10 / 90) blended yarn was wound and dyed at the same time. The speed was 900m / min. The yarn passed through the dyeing device to make the dye solution penetrate into the yarn and reach a saturated state. At the same time, the dyed yarn was wound on a loose bobbin to generate a loose cheese yarn. The dyed yarn was orange and the forming density of the loose cheese yarn was 0.42g / cm 3 ;

[0072] (3) Cheese damp-fast color

[0073] The dyed loose cheese yarn was fixed with saturated steam; the fixing temperature was 105°C, the fixing pressure was 0.15 MPa, and the fixing time was 50 min. The water was the reverse osmosis treated recycled water with a total salt content of 80 mg / L.

[0074] (4) Post-processing of cheese yarn

[0075] The loose cheese yarn treated in step (3) is subjected to the following process: the water is the reverse osmosis treated reclaimed water with a total salt content of 80 mg / L.

[0076] Soap wash → hot water wash → cold water wash → drying;

[0077] Soap washing: soap washing agent WO5g / L, temperature is 100℃, time is 50min;

[0078] Hot water washing: temperature is 100℃, time is 10min;

[0079] Cold water washing: Wash with normal temperature water for 15 minutes;

[0080] Drying: temperature is 80℃, time is 120 minutes.

[0081] The color fastness of the cheese yarns dyed in Examples 1-3 was tested using a soaping fastness tester, an ironing sublimation color fastness tester, and a rubbing fastness tester. The test results are shown in Table 1.

[0082] Table 1 Color fastness test results of dyed cheese yarn in Examples 1-3

[0083]

[0084] It can be seen from Table 1 that the fastness of the cheese yarns prepared in Examples 1-3 can reach level 4 or above.

[0085] The yarns before and after dyeing were subjected to strength tests, and the results are shown in Table 2.

[0086] Table 2 Strength test results of alginate fiber yarn before and after dyeing

[0087]

[0088] The yarns before and after dyeing were tested for seaweed fiber content, and the results are shown in Table 3.

[0089] Table 3 Alginate fiber content before and after dyeing of alginate fiber yarn

[0090]

[0091] It can be seen from Tables 2 and 3 that the strength of the dyed seaweed fiber yarn remains basically unchanged, and the seaweed fibers therein are almost undamaged.

Claims

1. An alkali-free and salt-free dyeing method for seaweed fiber blended fiber yarn, characterized in that: The following steps are involved: (1) Dye solution preparation Take active dye, moisturizing agent and water and mix them evenly to obtain dye solution; (2) Online dyeing of cheese yarn Pour dyeing liquid into the dyeing tank of the winding machine with a cheese yarn dyeing device, dyeing is performed simultaneously during the winding process, the yarn passes through the dyeing device so that the dyeing liquid penetrates into the yarn and reaches a saturated state, and at the same time, the dyed yarn is wound on a loose bobbin to generate a loose cheese yarn; (3) Cheese yarn moisture fixation Use saturated steam to fix the dyed loose cheese yarn; (4) Post-processing of cheese yarn The loose cheese yarn treated in step (3) is subjected to the following steps: Soap wash → hot water wash → cold water wash → drying; in: The water used in the alkali-free and salt-free dyeing method of the seaweed fiber blended fiber yarn is recycled water that has been treated with reverse osmosis; The total salt content of the reclaimed water is ≤100 mg / L; The reactive dye is an R-type reactive dye.

2. The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to claim 1, characterized in that: In step (1), the amount of the active dye is 0.1-6% of the total mass of the dye solution; the amount of the moisturizer is 2-8 g / L; the dye solution also includes a penetrant, and the amount of the penetrant is 0-8 g / L.

3. The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to claim 2, characterized in that: The penetrant in step (1) is a non-ionic surfactant.

4. The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to claim 1, characterized in that: The moisturizing agent in step (1) is fatty alcohol polyoxyethylene ether.

5. The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to claim 1, characterized in that: The speed of the winding process described in step (2) is 500-900 m / min.

6. The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to claim 1, characterized in that: The loose cheese yarn forming density in step (2) is 0.33-0.42 g / cm 3 .

7. The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to claim 1, characterized in that: In step (3), the fixing temperature is 100-110° C., the fixing pressure is 0.1-0.2 MPa, and the fixing time is 20-50 min.

8. The alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to claim 1, characterized in that: The soap washing process in step (4) is a soaping agent of 1-5 g / L, a temperature of 90-100°C, and a soap washing time of 10-50 min; the hot water washing process is a temperature of 90-100°C, and a hot water washing time of 10-50 min; and the cold water washing process is a normal temperature water washing.

9. An application of the alkali-free and salt-free dyeing method of seaweed fiber blended fiber yarn according to any one of claims 1 to 8, characterized in that: The invention is applied to the salt-free and alkali-free dyeing of seaweed fiber blended fibers, wherein the blending mass ratio of seaweed fiber to other fibers in the seaweed fiber blended fibers is (10-50%): (90-50%), and the yarn specification is 20-80s.

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