a method of dyeing

A dyeing method and technology for dyeing solution, applied in the field of textile printing and dyeing, can solve problems such as inability to achieve dyeing uniformity

Active Publication Date: 2020-08-25
SUZHOU TANGHUA NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But, when this chitosan derivative dispersant is added in the dyestuff and carries out large-scale continuous dyeing under normal temperature and pressure, because the contact time of dyestuff and fabric is very short, only 10~20s, and the area of ​​fabric expands, even if Grinding disperse dyes to the nanometer range under the action of dispersants still cannot achieve the uniformity of dyeing, and it is impossible to avoid the difference in front and back colors caused by migration during drying and color development.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Step 1: Preparation of halogenated crosslinking agent

[0071] Under the condition of ice-water bath, add oleic acid, hydrogen bromide, and chloroform respectively in a certain mass ratio to the three-necked flask, reflux with a straight condenser tube, stir, and react for 30-50 minutes, wash the product with water until it is neutral, add distilled bottle, and placed in a constant temperature water bath at 70-75°C to distill off the solvent chloroform and unreacted hydrogen bromide to obtain the yellow product A.

[0072] The mass ratio of oleic acid, hydrogen bromide and chloroform is: 1:0.28-0.35:1.78-2.14.

[0073] The equation for the reaction is:

[0074]

[0075] Step 2: Chitosan Modification

[0076] Add chitosan, sodium hydroxide, and product A to carbon tetrachloride in a certain proportion, stir at 80-100°C, react for 3-4 hours, and distill under reduced pressure at 40°C to obtain product B. Among them, the chitosan is selected from the water-soluble ch...

Embodiment 2

[0093] The overall idea of ​​embodiment 2 is carried out according to embodiment 1, and specific parameters are as follows:

[0094] The mass ratio of oleic acid, hydrogen bromide, and chloroform in step one is set as: 1:0.28:1.78, and product A is obtained by distillation at 70 ° C, and then chitosan, sodium hydroxide, product A, tetrachloromethane The mass ratio of carbonization is set as: 1:0.50:2.30:5.00, react at 80°C for 3 hours to obtain product B, and then set the mass ratio of glycerin, product B, catalyst, and toluene in step 3 as: 1:16.50 : 0.07: 4.00, product C was obtained by reacting at 140°C for 4 hours.

[0095] In step four, disperse red 3B, sodium lauryl sulfate, glycerin, and dispersant are ground with mass fractions of 2wt%, 3wt%, 2wt%, and 1wt% to prepare nano dyes, and then use 1.0g / L Add product C, add acetic acid to adjust the pH value of the dyeing slurry to 5.5, choose 190T, 58g / m 2 For polyester taffeta, according to step 4 dyeing method 1, set the...

Embodiment 3

[0096] The overall idea of ​​embodiment 3 is carried out according to embodiment 1, and specific parameters are as follows:

[0097] The mass ratio of oleic acid, hydrogen bromide, and chloroform in step one is set as: 1:0.31:2.00, and product A is obtained by distillation at 73°C, and then chitosan, sodium hydroxide, product A, tetrachloromethane The mass ratio of carbonization is set as: 1:0.55:2.35:5.50, react at 90°C for 3.5 hours to obtain product B, and then set the mass ratio of glycerin, product B, catalyst, and toluene in step 3 as: 1:17.00 : 0.08: 4.10, reacted at 145°C for 4.5 hours to obtain product C.

[0098] In step 4, disperse yellow G, sodium lauryl sulfate, glycerin, dispersant are ground with the mass fraction of 3.5wt%, 4wt%, 2.5wt%, 1.5wt%, prepare nano-dye, then with 1.5g / Add the amount of L to solid C, add acetic acid to adjust the pH value of the dyeing slurry to 6.0, choose 300T, 63g / m 2 Pongee, according to step 4 dyeing method 1, set the fabric ru...

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Abstract

The invention relates to a dyeing method, which is continuous dyeing under normal temperature and pressure. The desized fabric is introduced into a dye tank, and after the fabric is in contact with a dye composition, the dyeing is completed through drying and color development. Wherein, the running speed of the fabric is controlled to be 50-100m / min; or the foamed dye composition is applied to the surface of the desized fabric, and then the dyeing is completed through drying and color development, wherein the control The running speed of the fabric is 80-120m / min, and the coating speed of the dye composition is 0.30-0.45m 3 / min; the dye composition includes a leveling agent, and the structural formula of the leveling agent is: wherein, n is a number between 5 and 10. The dyeing method of the invention has fast dyeing speed, less dye consumption, low energy consumption, high color fastness, uniform color and no color difference, and the product can reach the grade A grade stipulated by the national standard.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and in particular relates to a method suitable for continuous padding or coating dyeing of polyester fabrics at normal temperature and pressure. Background technique [0002] The textile industry has made great contributions to my country's economic development, and the textile printing and dyeing industry employs more than 50 million people. Up to now, it has faced very serious problems of environmental pollution and energy shortage. The daily discharge of printing and dyeing wastewater reaches 6 million tons. Not only is the composition complex and changeable, but also the concentration is high, the chroma is deep, the COD value, Cr value are large, and it also contains a variety of toxic and harmful substances, which brings great impact on wastewater treatment and standard discharge. difficulty. At the same time, the printing and dyeing industry is also a resource-consumin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/16D06P1/48D06P1/62D06P1/651D06P3/54C08B37/08
CPCD06P1/16D06P1/48D06P1/627D06P1/65118D06P3/54C08B37/003
Inventor 陈艳珍王鹏陈精明曾桂香张仁海黄海彬
Owner SUZHOU TANGHUA NANO TECH
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