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Water-saving and energy-saving polyester dyeing method

A dyeing method and polyester technology, which can be used in dyeing, textile and paper making, etc., can solve the problems of troublesome solvent recovery and high cost, and achieve the effect of less water consumption, broad application prospects and less environmental impact.

Active Publication Date: 2020-06-05
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solvent dyeing also has the disadvantages of high cost and troublesome solvent recovery.

Method used

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  • Water-saving and energy-saving polyester dyeing method

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preparation example Construction

[0018] A, the preparation of deep eutectic solvent: after choline chloride, glycerol, benzyl alcohol are mixed in molar ratio 1: 1: 1, heated and stirred in water makes deep eutectic solvent;

[0019] B. Preparation of dyeing solution: disperse dye, DES and water according to the volume ratio, liquor ratio, and then stir evenly to prepare the dyeing solution;

[0020] C. Dyeing: add pre-treated polyester to the dyeing solution, then raise the temperature to 98-100°C at a rate of 1.5-2°C / min, and keep it warm for 40-60 minutes for dyeing;

[0021] D. Post-dyeing treatment: wash the dyed polyester with 60°C hot water first, then wash with cold water, dehydrate and then dry.

[0022] After mixing choline chloride, glycerin, and benzyl alcohol in a molar ratio of 1:1:1, heat and stir in a water bath at 40°C until a transparent liquid is formed to obtain a deep eutectic solvent (DES). Disperse dyes 1 to 3 % (owf), disperse dyes are low-temperature or medium-temperature disperse dy...

Embodiment 1

[0024] Embodiment 1: a kind of dyeing method of blue polyester pongee, concrete steps are as follows: A. the preparation of deep eutectic solvent (DES): take by weighing 35g choline chloride, 23g glycerin, 27g benzyl alcohol (each 0.25 mol), after mixing, heat and stir in a water bath at 40°C until a transparent liquid is formed, which is a deep eutectic solvent; Add blue AQE dye to 20mL water to disperse evenly, then add 80mL of DES prepared above, stir evenly at 40°C, and prepare 100mL dye liquor; Speed ​​up to 100°C, keep warm for 40min for dyeing; D. post-dyeing treatment: wash the dyed polyester fabric twice with 60°C hot water, then twice with cold water, dehydrate and then dry. The measured K / S value of the dyed fabric is 3.281, and the rubbing fastness and soaping fastness both reach grade 5.

Embodiment 2

[0025] Embodiment 2: a kind of dyeing method of red polyester pongee, concrete steps are as follows: A. the preparation of deep eutectic solvent (DES): take by weighing 35g choline chloride, 23g glycerol, 27g benzyl alcohol (each 0.25mol ), after mixing, heat and stir in a water bath at 40°C until a transparent liquid is formed to obtain a deep eutectic solvent; B. Preparation of the dyeing solution: weigh 0.15g of disperse ruby ​​SE-GFL according to the dyeing depth of 3% (owf). Add the dye to 30mL water to disperse evenly, then add 70mL of DES prepared above, stir evenly at 40°C, and prepare 100mL dyeing solution; C. Dyeing: Add 5g polyester fabric to the dyeing solution, and then heat up at a speed of 1.5°C / min Dyeing after dyeing: wash the dyed polyester fabric twice with hot water at 60°C, then twice with cold water, dehydrate and dry. The measured K / S value of the dyed fabric is 8.764, the rubbing fastness is grade 5, and the soaping fastness is grade 4-5.

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Abstract

The invention discloses a water-saving and energy-saving polyester dyeing method. The method comprises the following steps of A, preparing a deep-eutectic solvent, wherein choline chloride, glycerol and benzyl alcohol are mixed in a molar ratio of 1 : 1 : 1, and a mixture is heated and stirred in water to prepare the deep-eutectic solvent; B, preparing a dye liquor, wherein a disperse dye, DES andthe water are stirred uniformly according to a volume ratio and a bath ratio to prepare the dye liquor; C, performing dyeing, wherein pre-treated polyester is added in the dye liquor, then the temperature is increased to 98-100 DEG C at a speed of 1.5-2 DEG C / min, the temperature is kept for 40-60 min and dyeing is performed; and D, performing dyeing post-treatment, wherein the dyed polyester iswashed with hot water with the temperature of 60 DEG C firstly and then is washed with cold water, and drying is performed after dewatering. The method provided by the invention has the advantages that the water consumption is extremely low, the dyeing temperature is low, a dyeing auxiliary such as a dispersing agent does not need to be added, reduction clearing is not needed, a dyeing medium canbe recycled, water and energy are saved, and the influence of a traditional aqueous phase dyeing method on the environment can be reduced.

Description

technical field [0001] The invention relates to the technical field of water-saving and energy-saving low-temperature dyeing of polyester, in particular to a water-saving and energy-saving dyeing method of polyester. Background technique [0002] Polyester fiber is a commonly used textile fiber, usually dyed with disperse dyes. Traditional disperse dyeing uses water as the medium, and the dyeing temperature is high. When dyeing, various dyeing auxiliaries must be added to the dyeing bath, and reduction cleaning must be carried out after dyeing. The entire dyeing process consumes a lot of water and chemicals, and the waste water discharged Contains various difficult-to-remove surfactants and unused dyes, which increase the cost of sewage treatment. In order to reduce environmental pollution, people improve the dyeing process on the one hand, hoping to increase the utilization rate of dyes and reduce the use of water and chemical auxiliaries; on the other hand, they are also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/16D06P1/92D06P3/54D06P5/02
CPCD06P1/16D06P1/928D06P3/54D06P5/02Y02P70/62
Inventor 王春梅陈何卿吴云董艳超李龙飞
Owner NANTONG UNIVERSITY
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