CN105256529A - Dyeing method of vat dye for pure cotton fabric - Google Patents

Abstract

A dyeing method of a vat dye for a pure cotton fabric comprises the following steps: (1) fabric preparation; (2) fabric pretreatment; (3) vat dye leuco body solution preparation; (4) vat dye dip dyeing; (5) soap boiling; (6) after treatment. According to the dyeing method of the vat dye for the pure cotton fabric, 1-10 g/L of thiourea dioxide, 2-5 g/L of iso-tridecanol polyoxyethylene ether, 1-2 g/L of glucose, 2-5 g/L of sodium silicate and 1-2 g/L of sodium sulfide are used for preparing the vat dye leuco body solution, and the K/S value of the dyed fabric is improved remarkably.

Description

A kind of pure cotton fabric reducing dye colouring method

the application is application number is 2014103046825, and the applying date is on June 30th, 2014, and denomination of invention is the divisional application of the application for a patent for invention of " a kind of pure cotton fabric reducing dye colouring method ".

Technical field

The present invention relates to cotton fabric dyeing process field, especially the reducing dye colouring method of pure cotton fabric.

Background technology

Reducing dye is dyestuff conventional in printworks in modern age.They with a long history, China dyes with plant reduction dyestuff is indigo very early.Reducing dye is water insoluble, generally has the carbonyl of two or several conjugation in their conjugated system.In the basic conditions, carbonyl is reduced, and dyeing just can become water-soluble leuco compound sodium salt, is called for short leuco compound.Leuco compound contaminates on cellulose fibre, then through peroxidating, leuco compound is replied the dyestuff for insoluble state thus is anchored on fiber.

The reduction of reducing dye generally adopts caustic soda, sodium hydrosulfite, but it is sodium hydrosulfite poor stability, inflammable, also have and adopt vulcanized sodium as reductant, but its reduction effect is difficult to control, and in dyeing course, produce pernicious gas hydrogen sulfide, and cause in dyeing waste water and contain a large amount of sulfide, be difficult to administer.

Summary of the invention

For solving the problem, the invention provides a kind of colouring method of reducing dye, comprising the following steps:

(1) fabric prepares;

(2) fabric pretreatment;

(3) leuco vat dye solution preparation;

(4) reducing dye is contaminated;

(5) soap boiling;

(6) Final finishing.

Be specially: (1) selects pure cotton fabric, thread count is respectively 28/cm, 27/cm, margin to seam, and stitch density is 30-35cm/ pin, and line length 3-4cm is stayed at margin to seam two;

(2) pad pretreatment liquid, liquid carrying rate is 80-85%, then to bank up 30-60min at 90 DEG C of constant temperature, then fully washs 3-5min by the hot solution of polyoxyethylene ether fatty alcohol ether 1-3g/L and oxalic acid 0.5-2g/L, then use cold water washing twice;

(3) first by 0.01-5wt% reducing dye turkey red oil furnishing pulpous state, then according to the bath raio dilute with water of fabric and body lotion 1:10, then thiourea dioxide 1-10g/L, isomerous tridecanol polyoxyethylene ether 2-5g/L, glucose 1-2g/L, sodium metasilicate 2-5g/L, vulcanized sodium 1-2g/L is added, 45 DEG C are warming up to while stirring with the speed of 1 DEG C/min, make the abundant reductase 12 0min of dyestuff, the leuco compound solution of reducing dye can be obtained, added in dyeing apparatus;

(4) deoxygenation in dyeing apparatus, nitrogen is passed in dyeing apparatus, then dyeing apparatus is sealed, pure cotton fabric after pre-treatment is placed in the leuco compound solution of reducing dye, is warming up to 45-60 DEG C with the programming rate of 1-1.5 DEG C/min, is then incubated 10-12min, add the salt of 1.8-2.5g/L, continuous dye 10-12min poststaining terminates, and the pure cotton fabric taken out after dyeing is oxidized in atmosphere, then cold water washing;

(5) 90-100 DEG C of soap boiling in soap boiling liquid, described soap boiling liquid comprises 2-3g/L soap flakes, 2-3g/L soda ash, and time 10-15min, then washes;

(6) soft treatment post-reinforcing toner, shaping and drying at 110 DEG C-120 DEG C, then descends machine.

Preferably, in step (2), pretreatment liquid comprises clorox 8-15g/L, polyoxyethylated alkyl phenol 2-3g/L, it is 80% that potassium permanganate 0.2-0.5g/L pads rear liquid carrying rate, and then 90 DEG C of constant temperature are banked up 45min, then fully wash 5min by the hot solution of polyoxyethylene ether fatty alcohol ether 2g/L and oxalic acid 1g/L, then use cold water washing twice.

Preferably, step (3) is first by 2wt% reducing dye turkey red oil furnishing pulpous state, then according to the bath raio dilute with water of fabric with bath 1:10, then thiourea dioxide 3g/L, isomerous tridecanol polyoxyethylene ether 2g/L, glucose 1g/L, sodium metasilicate 2g/L, vulcanized sodium 1g/L is added, 45 DEG C are warming up to while stirring with the speed of 1 DEG C/min, continue stirring and make the abundant reductase 12 0min of dyestuff, the leuco compound solution of reducing dye can be obtained, added in dyeing apparatus.

Preferably, step (4) reducing dye is contaminated: deoxygenation in dyeing apparatus, in dyeing apparatus, pass into nitrogen, then dyeing apparatus is sealed, the pure cotton fabric after pre-treatment is placed in the leuco compound solution of reducing dye, 60 DEG C are warming up to the programming rate of 1 DEG C/min, then be incubated 12min, add the salt of 2.5g/L, continuous dye 12min poststaining terminates, the pure cotton fabric taken out after dyeing is oxidized in atmosphere, then cold water washing.

The present invention has following beneficial effect:

Adopted one-step method to carry out in pre-treatment effective destarch, refining and bleaching, saves technique and program, makes fabric be suitable for carrying out follow-up dyeing and processes.Thiourea dioxide is a kind of excellent reductant, and reducing power is better than sodium hydrosulfite, and good stability, storage safety.But in use have because thiourea dioxide occurred juvenescence sometimes, when being therefore used alone, Color is wayward.Many and sodium hydrosulfite or the composite use of vulcanized sodium in prior art.But the ratio of required sodium hydrosulfite, vulcanized sodium is higher.The present invention adds isomerous tridecanol polyoxyethylene ether, glucose and sodium metasilicate in reduction system, is surprised to find that, after dyeing, the K/S value of fabric obtains and significantly improves.Isomerous tridecanol polyoxyethylene ether improves the stability of leuco compound solution, adds reduction rate, adds the permeability of leuco compound solution simultaneously; Adding of glucose makes the reduction potential of whole reduction system more stable, and has reduction due to the aldehyde radical in glucose, ensure that the reducing power of whole reduction system; Sodium metasilicate instead of caustic soda, makes the pH of whole reaction gentleer, and adding of vulcanized sodium makes reaction more fast, thoroughly.

The concentration occurred in present specification, specification digest, claims, wt% is the percentage by weight relative to fabric, and all the other are mass concentration, and percentage is weight percentage.

Detailed description of the invention

Below in conjunction with specific embodiment, more detailed introduction is carried out to technical scheme of the present invention, but protection scope of the present invention is not limited thereto.

embodiment 1:

Select pure cotton fabric, thread count is respectively 28/cm, 27/cm, margin to seam, and stitch density is 35cm/ pin, and line length 4cm is stayed at margin to seam two; Pretreatment liquid comprises clorox 12g/L, polyoxyethylated alkyl phenol 2g/L, it is 80% that potassium permanganate 0.2g/L pads rear liquid carrying rate, and then 90 DEG C of constant temperature are banked up 45min, then fully wash 5min by the hot solution of polyoxyethylene ether fatty alcohol ether 2g/L and oxalic acid 1g/L, then use cold water washing twice.First by 2wt% reducing dye turkey red oil furnishing pulpous state, then according to the bath raio dilute with water of fabric with bath 1:10, then thiourea dioxide 3g/L, isomerous tridecanol polyoxyethylene ether 2g/L, glucose 1g/L, sodium metasilicate 2g/L, vulcanized sodium 1g/L is added, 45 DEG C are warming up to while stirring with the speed of 1 DEG C/min, make the abundant reductase 12 0min of dyestuff, the leuco compound solution of reducing dye can be obtained, added in dyeing apparatus; Deoxygenation in dyeing apparatus, nitrogen is passed in dyeing apparatus, then dyeing apparatus is sealed, pure cotton fabric after pre-treatment is placed in the leuco compound solution of reducing dye, is warming up to 60 DEG C with the programming rate of 1 DEG C/min, is then incubated 12min, add the salt of 2.5g/L, continuous dye 12min poststaining terminates, and the pure cotton fabric taken out after dyeing is oxidized in atmosphere, then cold water washing; 98 DEG C of soap boilings in soap boiling liquid, described soap boiling liquid comprises 2g/L soap flakes, 2g/L soda ash, and time 10min, then washes; Soft treatment post-reinforcing toner, shaping and drying at 110 DEG C, then descends machine.

embodiment 2:

Select pure cotton fabric, thread count is respectively 28/cm, 27/cm, margin to seam, and stitch density is 35cm/ pin, and line length 3cm is stayed at margin to seam two; Pretreatment liquid comprises clorox 12g/L, polyoxyethylated alkyl phenol 2g/L, it is 80% that potassium permanganate 0.2g/L pads rear liquid carrying rate, and then 90 DEG C of constant temperature are banked up 45min, then fully wash 5min by the hot solution of polyoxyethylene ether fatty alcohol ether 2g/L and oxalic acid 1g/L, then use cold water washing twice.Then in the indigotin of 2wt%, drip turkey red oil furnishing pulpous state, then dilute with water, then add 3wt% sodium hydrosulfite, thiourea dioxide 6wt%, and the caustic soda of 6g/L, stir and be warming up to 45 DEG C, making the abundant reductase 12 0min of dyestuff, the leuco compound solution of reducing dye can be obtained; Infiltrated by pure cotton fabric, be then placed in the leuco compound solution of reducing dye, be warming up to 60 DEG C, be then incubated 12min with the programming rate of 1 DEG C/min, add the salt of 2.5g/L, continuous dye 12min poststaining terminates; The pure cotton fabric taken out after dyeing is oxidized 20min, then cold water washing, then 98 DEG C of soap boilings in soap boiling liquid in atmosphere, and described soap boiling liquid comprises 2g/L soap flakes, 2g/L soda ash, and time 10min, then washes, and dries.

embodiment 3:

Select pure cotton fabric, thread count is respectively 28/cm, 27/cm, margin to seam, and stitch density is 35cm/ pin, and line length 3cm is stayed at margin to seam two; Pretreatment liquid comprises clorox 12g/L, polyoxyethylated alkyl phenol 2g/L, it is 80% that potassium permanganate 0.2g/L pads rear liquid carrying rate, and then 90 DEG C of constant temperature are banked up 45min, then fully wash 5min by the hot solution of polyoxyethylene ether fatty alcohol ether 2g/L and oxalic acid 1g/L, then use cold water washing twice.Then in the indigotin of 2wt%, drip turkey red oil furnishing pulpous state, then dilute with water, then add 3wt% thiourea dioxide, 6wt% vulcanized sodium, and the caustic soda of 6g/L, stir and be warming up to 45 DEG C, make the abundant reductase 12 0min of dyestuff, the leuco compound solution of reducing dye can be obtained; Infiltrated by pure cotton fabric, be then placed in the leuco compound solution of reducing dye, be warming up to 60 DEG C, be then incubated 12min with the programming rate of 1 DEG C/min, add the salt of 2.5g/L, continuous dye 12min poststaining terminates; The pure cotton fabric taken out after dyeing is oxidized 20min, then cold water washing, then 98 DEG C of soap boilings in soap boiling liquid in atmosphere, and described soap boiling liquid comprises 2g/L soap flakes, 2g/L soda ash, and time 10min, then washes, and dries.

Contrast on effect is see table 1

Table 1

	K/S value
		Embodiment 1	12.17
Embodiment 2	4.52
		Embodiment 3	5.23

Wherein compared to traditional complex process of sodium hydrosulfite and thiourea dioxide, the increasing of after-dyeing K of the present invention/S value is deeply than being (12.17-4.52)/4.52=169%.

Compared to traditional complex process of vulcanized sodium and thiourea dioxide, the increasing of after-dyeing K of the present invention/S value is deeply than being (12.17-5.23)/5.23=133%.

As can be seen here, adopt colouring method of the present invention, the Color of reducing dye can be significantly improved.

The above is the preferred embodiment of the present invention, it should be pointed out that the general technical staff for the art, and under the premise without departing from the principles of the invention, can also make improvement and modification, these improve and modification also should be considered as protection scope of the present invention.

Claims (2)

1. a pure cotton fabric reducing dye colouring method, is characterized in that comprising the following steps:

(1) fabric prepares;

(2) fabric pretreatment;

(3) leuco vat dye solution preparation;

(4) reducing dye is contaminated;

(5) soap boiling;

(6) Final finishing.

2. colouring method as claimed in claim 1 or 2, is characterized in that,

In described step (2), pretreatment liquid comprises clorox 8-15g/L, polyoxyethylated alkyl phenol 2-3g/L, it is 80% that potassium permanganate 0.2-0.5g/L pads rear liquid carrying rate, and then 90 DEG C of constant temperature are banked up 45min, then fully wash 5min by the hot solution of polyoxyethylene ether fatty alcohol ether 2g/L and oxalic acid 1g/L, then use cold water washing twice.