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Dyeing method of alkali-resistant dispersed dye used by dacron ultrafine fiber

A polyester microfiber and disperse dye technology, which is applied in the field of textile dyeing and finishing, can solve the problems of fabric tar spots, large pollution discharge, and high processing water consumption, and achieve the reduction of total waste water discharge, shortening of process flow, and reduction of energy consumption Effect

Active Publication Date: 2009-12-30
ZHEJIANG WANFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The processing process is long, the processing water consumption is high, and the pollution discharge is large;
[0004] (2) The oligomers inside the polyester fiber cannot be removed, which not only affects the feel of the product, but also easily forms "tar spots" on the surface of the fabric
The leveling agent is mostly a compound composed of anionic surfactant and nonionic surfactant. Some oligomer removers are added to the leveling agent in order to reduce the adverse effects of oligomers in polyester fibers on the fabric. These have greatly increased the cost of dyeing

Method used

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  • Dyeing method of alkali-resistant dispersed dye used by dacron ultrafine fiber
  • Dyeing method of alkali-resistant dispersed dye used by dacron ultrafine fiber
  • Dyeing method of alkali-resistant dispersed dye used by dacron ultrafine fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In the 500ml flask, add 4,4'-formyl chloride azobenzene (that is: azobenzene-4,4'-dicarbonyl chloride) 30.7g and distilled water 100g, adjust the pH value of the solution to 9.5 with sodium hydroxide, in Stir in a high-shear machine, slowly add 6g of castor oil polyoxyethylene (24) ether, emulsify for 15min, heat up to 70°C after adding, then slowly add β-cyclodextrin 113.5g, keep at 70°C for 2 Hours, after the reaction is completed, it is filtered, washed and dried to obtain the azocyclodextrin pre-condensed body. Adjust the pH of the azocyclodextrin precondensate to 8, add 31.6g of disperse dye C.I. Disperse Yellow 11 to the azocyclodextrin precondensate, control the temperature at 40°C, stir at high speed while adding, and stir evenly , filtered under reduced pressure, washed and dried to obtain an alkali-resistant disperse dye complexed with azocyclodextrin. Adjust the pH of the alkali-resistant disperse dye complexed with azocyclodextrin to 7, and slowly add 8.6 g...

Embodiment 2

[0056] Add 2,2'-dimethyl-4,4'-formyl chloride azobenzene 34.0g and distilled water 100g in a 500ml flask, adjust the pH value of the solution to 10.0 with sodium hydroxide, stir in a high shear machine, Slowly add 7g of lauryl polyoxyethylene (7) ether, emulsify for 20min, heat up to 80°C after adding, then slowly add 129.7g of γ-cyclodextrin, keep at 80°C for 2.5 hours, after the reaction is completed, filter, After washing and drying, the azocyclodextrin precondensate is obtained. Adjust the pH value of the azocyclodextrin precondensate to 8, and add 31.5g of the monoazoheterocyclic blue alkali-resistant disperse dye in the Chinese patent application whose application number is 200910099854.9 to the azocyclodextrin precondensate (application number is the disperse dye that the structural formula disclosed in the Chinese patent application of 200910099854.9 is shown in formula (I), and molecular formula is C 18 N 6 o 2 h 18 ), control the temperature at 40°C, stir at high...

Embodiment 3

[0061] Add 30.7g of 4,4'-formylchloroazobenzene and 100g of distilled water into a 500ml flask, adjust the pH value of the solution to 9.5 with sodium hydroxide, stir in a high shear machine, and slowly add 6g of lauryl glycol Ether, emulsified for 20min, heated up to 75°C after adding, then slowly added 124.8g of β-cyclodextrin, kept at 75°C for 2.5 hours, after the reaction was completed, filtered, washed and dried to obtain azocyclodextrin pre- shrinkage. Adjust the pH of the azocyclodextrin precondensate to 8, add 296.1g of C.I. Disperse Red 73 disperse dye to the azocyclodextrin precondensate, control the temperature at 50°C, stir at high speed while adding, and stir evenly , filtered under reduced pressure, washed and dried to obtain an alkali-resistant disperse dye complexed with azocyclodextrin. Adjust the pH of the alkali-resistant disperse dye complexed with azocyclodextrin to 7.5, slowly add 7.6 g of 1815 nonionic surfactant and 10.0 g of diffusing agent NNO at roo...

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Abstract

The method discloses a dyeing method of an alkali-resistant dispersed dye used by dacron ultrafine fiber. The dyeing method comprises the following steps: destarching the dacron ultrafine fiber or fabric, washing the dacron ultrafine fiber or fabric with water, then adding a dye liquor consisting of the alkali-resistant dispersed dye and water, adjusting the pH value to be 10-12, slowly warming till the temperature reaches 120-135 DEG C, keeping the temperature for 45-90 min, carrying out dyeing, then washing the dyed dacron ultrafine fiber or fabric with water, and neatening the dacron ultrafine fiber or fabric. The alkali-resistant dispersed dye is azocyclodextrin-coated dispersed dye. The method combines the fiber opening and the dyeing of the dacron ultrafine fiber or fabric, adopts a one-bath-one-stage procedure, obvious shortens the process procedure, requires low energy consumption and discharges less wastewater.

Description

technical field [0001] The invention relates to the technical field of textile dyeing and finishing, in particular to a method for dyeing polyester superfine fibers with strong alkali-resistant disperse dyes. Background technique [0002] The dyeing process of polyester fiber is mainly dyed under weakly acidic conditions (pH value 4.5-5.5). Unstable under certain conditions, prone to discoloration. However, disperse dyes mainly have the following disadvantages when they are dyed under weakly acidic conditions: [0003] (1) The processing process is long, the processing water consumption is high, and the pollution discharge is large; [0004] (2) The oligomers inside the polyester fiber cannot be removed, which not only affects the feel of the product, but also easily forms "tar spots" on the surface of the fabric. [0005] At present, the main technological process of polyester superfine fiber or superfine composite fiber dyeing and processing is: fiber or fabric → desizi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/54D06P1/18
Inventor 俞杏英朱亚伟
Owner ZHEJIANG WANFENG CHEM
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