CN100392164C - Production method of pure cotton yarn without fly pollution - Google Patents

Abstract

The invention discloses a method for making pure cotton yarn without flying flower pollution. Cationic modified cotton and white cotton are uniformly mixed and spun at a weight ratio of 5-50:95-50, and then 0.5-3.5 weight % reactive dyes dye the yarn at 60-100°C for 20-70 minutes under neutral and salt-free conditions. The fancy yarn produced by the method of the present invention has a hazy "flower gray" appearance, which solves the problem of easy cross-color caused by "flying flowers" in the production of light-colored yarn, and can be used for processing high-grade underwear, T-shirts, casual clothes, etc. The best ingredients.

Description

Production method of pure cotton yarn without fly pollution

1. Technical field

The invention relates to a method for making pure cotton yarn without flying flower pollution, more specifically, it is a method for dyeing loose cotton after cationic modification with active dyes.

2. Background technology

Cotton loose fiber is usually dyed with reactive dyes, but because the fiber will be negatively charged due to hydrolysis in aqueous solution, it is difficult for the dye anion to penetrate deep into the fiber, so the dyeing rate is not high enough and a large amount of electrolyte is required to promote dyeing. Dyeing wastewater contains high concentrations of dyes and salts, which seriously pollute the environment. Therefore, researchers have done a lot of research around improving the utilization rate of reactive dyes. The results show that it is difficult to achieve a high utilization rate only from the modification of the molecular structure of the dye itself. This is because the saturation limit of the reactive dye is small, and most of the dye will be hydrolyzed during the dyeing process. The hydrolysis of the active group is insurmountable. However, the problem of dyeing of reactive dyes and cotton fibers can be improved by modifying cotton fibers and improving the reactivity of dyes and fibers.

3. Contents of the invention

The purpose of the invention is to provide a new production method in order to overcome the defect of easy flying flower pollution in the traditional pure cotton dyed yarn production method.

The second object of the present invention is to provide a method for cationic modification of cotton bulk fibers.

The third object of the present invention is to provide a method for preparing fancy yarns using cationic modified cotton.

These and other objects of the present invention will be further embodied and illustrated by the following detailed description and illustration.

In the method for making pure cotton yarn without flying flower pollution of the present invention, cationic modified cotton and white cotton are uniformly mixed and spun at a weight ratio of 5-50:95-50, and then 0.5-3.5% by weight The reactive dyes with low affinity to cotton fibers are used to dye the yarn at 60-100°C for 20-70 minutes under neutral and salt-free conditions.

Preferably, in the production method of pure cotton yarn without flying flower pollution of the present invention, cationic modified cotton and white cotton are uniformly mixed and spun at a weight ratio of 10-30:90-70, and then used 0.5-3.0% by weight of the reactive dye with low affinity to cotton fiber is used to dye the yarn at 70-90° C. for 30-60 minutes under neutral and salt-free conditions.

Further, in the method for making pure cotton yarn without flying flower pollution of the present invention, the cationic modified cotton is treated with a cationic modifier after the loose fiber is pre-scoured, wherein the pre-scoured The process is:

Refining agent 5-30 g/L

Caustic soda 5-25 g/L

Bath ratio 1:10-1:20

Dip in a water bath at 60-100°C for 20-80 minutes.

Preferably, wherein the process of refining pre-treatment is:

Refining agent 5-20 g/L

Caustic soda 5-15 g/L

Bath ratio 1:15-1:20

Dip in a water bath at 60-100°C for 40-80 minutes.

In the non-fly pollution-free pure cotton yarn manufacturing method of the present invention, the refining agent is a non-ionic mixed surfactant, preferably Q-2.

In the method for making pure cotton yarn without flying flower pollution of the present invention, the modification method of the cationic modified cotton is:

Modifier 10-50 g/L

Caustic soda 5-30 g/L

Penetrant 0.1-10 g/L

Bath ratio 1:10-1:20

After soaking in a water bath at 50-90°C for 20-80 minutes, take it out and wash it with dilute acetic acid and water until the pH is 5-8.

Preferably, in the pure cotton yarn production method without flying flower pollution of the present invention, the modification method of the cationic modified cotton is:

Modifier 10-30 g/L

Caustic soda 10-20 g/L

Penetrant 1.0-5 g/L

Bath ratio 1:10-1:20

After soaking in a water bath at 60-80°C for 40-60 minutes, take it out and wash it with dilute acetic acid and water until the pH is 6-7.

In the method for making pure cotton yarn without flying flower pollution of the present invention, the modifier is a quaternary ammonium cationic etherification agent, preferably a chlorinated-s-triazine type quaternary ammonium compound, such as Ningbo Hyde knitting Chlorinated-s-triazine-type quaternary ammonium compound YL series products produced by Auxiliary Factory of Bleaching and Dyeing Co., Ltd., such as YL-1, YL-2 and YL-3. The penetrating agent is one of China Meigaoyi M-105, high-efficiency penetrating agent JFC-5 and penetrating agent 8601. Described this white cotton is the cotton loose fiber that has been oiled with 0.5-8% by weight (preferably 2-5% by weight) hydrophobic silicone softener, preferably softener is Ciba CWS, Switzerland One of softener SPE, softener COS and softener FT. The refining agent can be one of Qingdao's Q-2, RAA-100 and RAS-1, etc., and the loose cotton fiber is one of cotton, sliver, loose cotton and combed cotton web.

In the method for making pure cotton yarn without flying flower pollution of the present invention, reactive dyes with low affinity to cotton fibers and a chlorinated-s-triazine structure are used, such as Ciba CIBACRON P and DyStar Procion PX active dyes. Dye, and no salt and alkali are added during the dyeing process, that is, the yarn is dyed under neutral and salt-free conditions.

In the present invention, the cotton fiber can be modified with a quaternary ammonium cationic etherification agent. The etherification agent contains reactive groups, which can react with the hydroxyl groups in the fiber and introduce a large amount of positive charges on the fiber, thus improving the fiber's contact with the fiber. The affinity between dyes accelerates the dyeing speed of reactive dyes and increases the dyeing rate. Since there are many oils and natural impurities in the loose cotton fiber, which reduces the wettability of the fiber, in order to improve the effect of fiber modification and dyeing quality, without affecting its spinnability as much as possible, it can be treated with scouring agent to properly remove Impurities in the fiber and wax on the surface allow the treatment liquid to penetrate into the fiber quickly and evenly during processing, significantly improving the quality and style of the product.

The cationic modified cotton is evenly mixed with the white cotton in a certain proportion and spun, and the yarn is dyed with a reactive dye with low affinity with cotton fiber under neutral and salt-free conditions, and the hazy "gray gray" can be obtained. "Fancy yarn for the look. Among them, under neutral and salt-free conditions, cationic modified cotton can still be dyed, while bleached cotton treated with a hydrophobic softener is basically not stained (white ground). Therefore, by changing the percentage content of cationic modified cotton Adjust the shade of fancy yarn color.

The colored spun yarn produced by the method of the present invention has a hazy "flower gray" appearance, which solves the problem of easy cross-color caused by "flying flowers" in the production of light-colored yarn, and can be used for processing high-grade underwear, T-shirts, casual clothes, etc. The best ingredients.

The present invention is further described below through specific examples, but the examples are only for illustration and cannot limit the scope of the present invention.

In the present invention, unless otherwise specified, all parts and amounts are weight units based on the total weight, and all raw materials can be purchased from the market.

4. Specific implementation

Example 1:

Select 100 kg of sawtooth cotton, put the cotton into a bath ratio of 1:15 at room temperature, contain 15 g/L refining agent Q-2, and 8 g/L caustic soda solution, raise the temperature to 95 °C and soak for 60 minutes, then wash twice with water . Putting the cotton into a bath ratio of 1:15, containing 15 g/L quaternary ammonium cationic etherification agent (chloro-s-triazine type quaternary ammonium compound YL-1), 10 g/L caustic soda solution and 4 g/L osmotic In the agent (China Meigaoyi M-105), the temperature is raised to 80°C and soaked for 50 minutes, then washed with dilute acetic acid and water until neutral. 20% cationic modified cotton and 80% white cotton (treated with 1% by weight Swiss Ciba CWS softener) were evenly mixed and spun, and then 1.0% CIBACRON REDP-BN reactive dye was applied under neutral and salt-free conditions Dyeing the yarn at 60°C for 70 minutes can produce a red pure cotton yarn without fly pollution.

Example 2:

Select 100 kg of sawtooth cotton, put the cotton in a bath ratio of 1:20 at room temperature, contain 10 g/L refining agent Q-2, and 10 g/L caustic soda solution, raise the temperature to 90 ° C and soak for 40 minutes, then wash twice with water . Putting the cotton into the bath ratio again is 1: 20, containing 25 g/L quaternary ammonium type cationic etherification agent (chloro-s-triazine type quaternary ammonium compound YL-1), 15 g/L caustic soda solution and 1.5 g/L osmosis In the agent (China Meigaoyi M-105), the temperature is raised to 60°C and soaked for 60 minutes, then washed with dilute acetic acid and water to neutral. 10% cationic modified cotton and 90% white cotton (after treatment with 3 wt% Swiss Ciba CWS softener) were uniformly mixed and spun, and then 3.0% CIBACRONORANGE P-4R reactive dye was applied under neutral and salt-free conditions Dyeing the yarn at 80°C for 50 minutes can produce orange pure cotton yarn without fly pollution.

Example 3:

Select 100 kg of sawtooth cotton, put the cotton in a bath ratio of 1:15 at room temperature, contain 5 g/L refining agent Q-2, and 8 g/L caustic soda solution, raise the temperature to 80 °C and soak for 50 minutes, then wash twice with water . Then put the cotton into a bath ratio of 1:20, containing 20 g/L quaternary ammonium cationic etherification agent (YL-2), 10 g/L caustic soda solution and 0.5 g/L penetrating agent (China Meigaoyi M-105 ), heated to 70°C and soaked for 50 minutes, then washed to neutral with dilute acetic acid and water. 30% cationic modified cotton and 70% white cotton (after treatment with 1.5 wt% Swiss Ciba CWS softener) were evenly mixed and spun, and then 0.5% Procion Blue PX-3R reactive dye was applied under neutral salt-free conditions Dye the yarn at 90°C for 40 minutes to produce a blue pure cotton yarn without fly pollution.

Example 4:

Select 100 kg of sawtooth cotton, put the cotton in a bath ratio of 1:20 at room temperature, contain 7 g/L refining agent Q-2, 7 g/L caustic soda solution, raise the temperature to 70 °C and soak for 40 minutes, then wash twice with water . Then put the cotton into a bath ratio of 1:15, containing 25 g/L quaternary ammonium cationic etherification agent (YL-3), 15 g/L caustic soda solution and 1 g/L penetrating agent (China Meigaoyi M-105 ), heated to 70°C and soaked for 40 minutes, then washed with dilute acetic acid and water until neutral. 20% cationic modified cotton and 80% white cotton (after treated with 5% by weight Swiss Ciba CWS softener) were uniformly mixed and spun, and then 2.0% Procion Turquoise PX-GR reactive dye was applied under neutral salt-free conditions Dyeing the yarn at 95°C for 30 minutes can produce emerald blue pure cotton yarn without fly pollution.

Example 5:

Select 100 kg of cotton sliver, put the cotton into a bath ratio of 1:18 at room temperature, containing 30 g/L refining agent RAA-100, 5 g/L caustic soda solution, raise the temperature to 98 °C and soak for 30 minutes, then wash three times with water . Then put the sliver into a bath ratio of 1:18, containing 30 g/L quaternary ammonium cationic etherification agent (YL-1), 20 g/L caustic soda solution and 1.5 g/L penetrant (high-efficiency penetrant JFC-5 ), heated to 70°C and soaked for 45 minutes, then washed with dilute acetic acid and water until neutral (PH is about 7). 20% cationic modified cotton and 80% white cotton (after treated with 6% softener SPE by conventional method) were uniformly mixed and spun, and then 1.0% CIBACRON RED P-BN reactive dye was applied under neutral salt-free conditions Dye the yarn at 95°C for 30 minutes to produce a red pure cotton yarn without fly pollution.

Embodiment 6:

Select 100 kg of combed cotton mesh, put the cotton into a bath ratio of 1:20 at room temperature, contain 18 g/L refining agent RAS-1, and 8 g/L caustic soda solution, raise the temperature to 75 °C and soak for 80 minutes, then wash with water Two ways. Cotton is put into bath ratio again and be 1: 20, in containing 45 grams/liter quaternary ammonium type cationic etherification agent (YL-1), 20 grams/liter caustic soda solution and 5 grams/liter penetrating agent (penetrating agent 8601), heat up After dipping at 60°C for 60 minutes, wash with dilute acetic acid and water to near neutrality. 25% cationic modified cotton and 75% white cotton (after treatment with 1% by weight softener FT) were evenly mixed and spun, and then 2.1% Procion Turquoise PX-GR reactive dye was applied under neutral salt-free conditions at 60 Dyeing the yarn for 70 minutes at ℃ can produce emerald blue pure cotton yarn without fly pollution.

Claims (10)

1. method for making pure cotton yarn that does not have flying contamination, it is characterized in that cationic modified cotton and gray cotton are evenly mixed and spinning by the weight ratio of 5-50: 95-50, adopt 0.5-3.5 weight % then with the low REACTIVE DYES of cotton fiber compatibility under the salt-free condition of neutrality in 60-100 ℃ to becoming dyeing yarn 20-70 minute, the bulk cotton fibres of described gray cotton for crossing with Switzerland's vapour crust CWS oiling treatment, described dyestuff is to cotton fiber compatibility REACTIVE DYES low, that the chloro s-triazine structure is arranged.

2. the method for making pure cotton yarn of no flying contamination according to claim 1 is characterized in that described cationic modified cotton is that bulk fibre is handled with cation modifier earlier again after concise pre-treatment, and wherein the technology of concise pre-treatment is:

Refining agent 5-30 grams per liter

Caustic soda 5-25 grams per liter

Bath raio 1: 10-1: 20

In 60-100 ℃ of water-bath impregnation process 20-80 minute.

3. the method for making pure cotton yarn of no flying contamination according to claim 1 is characterized in that described cationic modified cotton is that bulk fibre is handled with cation modifier earlier again after concise pre-treatment, and wherein the technology of concise pre-treatment is:

Refining agent 5-20 grams per liter

Caustic soda 5-15 grams per liter

Bath raio 1: 15-1: 20

In 60-100 ℃ of water-bath impregnation process 40-80 minute.

4. according to the method for making pure cotton yarn of claim 2 or 3 described no flying contaminations, it is characterized in that described refining agent is Q-2.

5. the method for making pure cotton yarn of no flying contamination according to claim 1 is characterized in that the method for modifying of described cationic modified cotton is:

Modifier 10-50 grams per liter

Caustic soda 5-30 grams per liter

Bleeding agent 0.1-10 grams per liter

Bath raio 1: 10-1: 20

Dipping is after 20-80 minute in 50-90 ℃ of water-bath, and taking out with spirit of vinegar is 5-8 with washing PH.

6. the method for making pure cotton yarn of no flying contamination according to claim 1 is characterized in that the method for modifying of described cationic modified cotton is:

Modifier 10-30 grams per liter

Caustic soda 10-20 grams per liter

Bleeding agent 1.0-5 grams per liter

Bath raio 1: 10-1: 20

Dipping is after 40-60 minute in 60-80 ℃ of water-bath, and taking out with spirit of vinegar is 6-7 with washing PH.

7. according to the method for making pure cotton yarn of one of claim 5 or 6 described no flying contamination, it is characterized in that described modifier is quaternary ammonium cation etherifying agent or chloro s-triazine type quaternary ammonium compound.

8. according to the method for making pure cotton yarn of one of claim 5 or 6 described no flying contamination, it is characterized in that described bleeding agent is the high chin or cheek M-105 of middle Guomei.

9. the method for making pure cotton yarn of no flying contamination according to claim 1 is characterized in that described bulk cotton fibres is one of cotton, sliver, loose wool and comber web.

10. the method for making pure cotton yarn of no flying contamination according to claim 1 is characterized in that described is vapour crust CIBACRON P and De Sida Procion PX REACTIVE DYES to cotton fiber compatibility REACTIVE DYES low, that the chloro s-triazine structure is arranged.