Method of dyeing textile materials


D06P5/26 - Heat transfer printing

 

The invention relates to dyeing and finishing production, in particular to a method of dyeing textile material, preferably wool, polyamide, blends of wool with polyamide, natural silk. Describes a method of dyeing textile materials which consists in processing the material in the dye bath solution containing acid, acid metal complex or reactive dye at 75-80oWith using as an intensifier dyeing redox system hydrogen peroxide-propantriol 1,2,3, or hydrogen peroxide-hexamethylenetetramine, or hydrogen peroxide-Polyoxymethylene when the mass ratio of components equal to 1:1 or 3: 1, respectively, and when the concentration of the intensifier dyeing equal 0,0075-0.015 mol/l, predominantly within 120-160 minutes the Technical result is to increase the processability of the dyeing process by reducing the temperature dyeing while improving the dyeability, maintaining physical and mechanical properties, reduced shrinkage of the material. 2 C.p. f-crystals, 1 table.

The invention relates to dyeing and finishing production, namely the way the coloring material is a dye in the presence of intensifiers dyeing.

Known methods of dyeing wool-containing dye bath intensifiers: thiocarbamide, stillage concentrate liquid (KBZH), methylamine, organic solvents and other (Lednev, I. A., Kamensky B. C. current state and prospects of development of technology of dyeing wool. M - 1998, Legprombytizdat, S. 100-105). These methods have several disadvantages, such as thiocarbamide and KBZH are mainly used only for dyeing chrome dyes. When using formic acid requires special expensive equipment from acid-resistant steel grades. The use of organic solvents requires special equipment and the subsequent recovery of the solvent. Practical application of methylamine and some other amines is more difficult, because the necessary sealing equipment, there is a decrease in strength characteristics of the fiber material, the colour intensity is not increased. Furthermore, the method only applies to the dyeing of wool with acid dyes.

There is a method of dyeing wool with the introduction of the dyeing bath as intensifiers drugs from a number of surface-active substances (surfactants), which are used as alignment is: Senegal V-7, with the th dyeability, in addition, the use of surfactant corresponds to a certain class of dyes (metal, chrome or just acid). According to this method, the dyeing takes place at pH of about 2, which is achieved by the introduction of sulfuric acid, which leads to increased corrosion of equipment and degrades the environment in the shop.

There is a method of dyeing wool by treatment of dye solution containing an acid dye and auxiliary substance - nitrogen-containing organic compound based on the dibasic acid polietilenglikolya aliphatic amines. The disadvantage of this method is that the auxiliary substance is formed during the 6-hour condensation of an amine of animal fat with ethylene oxide or propylene oxide at 95-100oIn the presence of urea and amidosulfonic. This process is rather costly, the method applies only to dyeing with acid dyes (Leeder J. R., J. Rippon A. induced Changes in the properties of wool by sp. EP., Journal of Society Dryers Color, 1985, Vol. 101, No. 1, p. 11-16).

There is a method of dyeing wool, according to which the fibrous material is pre-processed solutions of bonds alkylamines, ammonia, cyanamide, thioacetamide, polyethylenimine, tributylphosphine, primeoneone temperature. , B. N. Kononenko, N. And. Makarov, A. A. Arkharov and other Textiles, 1983, 3, S. 55-56; Krichevsky, E., etc. of Chemical technology of textile materials. M, Legprombytizdat, 1985, S. 397). However, this method has several disadvantages, one of which is the increase in the duration of the process as carried out preliminary processing of the material, after which the necessary thorough rinsing, since the processing is carried out in an alkaline medium. In addition, concentrated solutions of amines cause degradation of fiber, have an unpleasant odor, which makes the process environmentally harmful, you need special equipment. This method is used only for dyeing with acid dyes.

There is a method of dyeing protein fibers with the use of additives, which consists of a solvent, tributoxyethyl and the carrier of a particular anion. The solvent may be dimethylformamide, N-methylmorpholine, pyridine, hexamethylphosphoric triamide, etc. as a carrier of anions can be salt: NaClO4, NaCNS, KCNS and other (Additive for low temperature dyeing of protein product and method of dyeing with the use of the additive. Pat. EP 681056 AI. 29.07.94/Koike engineering Germany, Sachizumi, 6 D 06 P 5/00, tis, that degrades the environment. Additionally, the connection is difficult or insoluble in water and are used in the form of emulsions, i.e., there is the problem of the separation of emulsions. The use of chlorine-containing drugs is a danger of formation of dioxins. The colour intensity is not increased, the method is applicable only for acid and chrome dyes.

There is a method of dyeing wool or mixed with polyamide fiber with the use of intensifiers amino acids. However, this method is only available for dyeing acid dyes (Method of dyeing textile materials of wool or of its mixture with the PA fiber. Pat. 49092993/05; 07.02.91/ Bura A. A., Okulovsky N. In., Borozdina L. C., and others 15.11.93, D 06 P 3/14).

The closest is the method described in the article "the Influence of redox additives on nakruchivaet woolen fabrics acid, chromium and KMC dyes" / L. P. Shatokhina in. A. Safonov, O. A. Chesnokov // Technology of textile industry 1, 1999, as stimulating additives are used oxidizing agents and reducing agents: hydrogen peroxide, peroxodisulfate potassium, thiourea, glucose, pyrocatechin, potassium thiosulfate. Primenews the school system. While increasing the dyeability of wool or polyamide fibers with acid and KMC dyes.

However, this method has several disadvantages: the dyeing carried out by a standard method at a temperature of 100oWith supplements have different effects for different brands of acid dyes, i.e., not universal. The optimal concentration of redox systems are different for different dyes. The method is applicable only when dyeing wool or nylon fiber, and only for acid, metal complex and chrome dyes. Used reducing agents with a high value of the potential, this destroys the chromophore system of the dyes. There is a danger of damage to the substrate.

The technical result of the claimed solution is to eliminate the drawbacks, namely improving the processability of the dyeing process by reducing the temperature dyeing while improving the dyeability, maintaining acid or active dyes wool, polyamide fibres, materials, mixtures thereof, natural silk, cotton and viscose.

The current task is achieved according to the proposed method of dyeing, the use of acid or hell hydrogen the reducing agent in a ratio of 1:1 or 3:1, where the reducing agent is propantriol 1,2,3, or hexamethylenetetramine, or Polyoxymethylene. The concentration of the intensifier is 0,0075-0.015 mol/L. the dyeing Process is carried out at a temperature of 75-80oC.

Textile material made of wool, polyamide, and mixtures thereof, natural silk, cotton, viscose dyed with simultaneous introduction of a redox system in the dyeing bath.

The duration of the dyeing is 120-160 minutes

Proposed stimulating additives are non-toxic, environmentally safe, are used in small quantities, effectively from the point of view of the economy.

Thus, the claimed indications show how its properties set forth above, and more, which ensure the achievement of the objectives of the invention (see table).

Below are examples of the subject matter of this invention. In examples 1-4 were conducted dyeing wool rovings with a redox system hydrogen peroxide - propantriol 1,2,3 (a), which was carried out at module 1:50 according to the mode and the recipe described in example 1.

Example 1 1. The rovings are treated in a solution containing, per cent by weight of the fibers: Surface the PTA (30%) - 2 redox system (a), mol/l - 0,0075+0,0075 Treatment of 10 min at 40oC.

2. Introduction dye acid Bordeaux. Dyeing 10 minutes

3. Heating to 80oWith 30 minutes

4. Dyeing at 80oWith 30 minutes

5. The addition of acetic acid 2.

6. Dyeing at 80oWith 30 minutes

7. Cooling and flushing 10 minutes

Total: 120 minutes

Samples dyed rovings were tested in accordance with GOST 9733.8-83 on the stability of colors to washings, and solubility in 0.1 N. the solution of alkali (Arkharov A. A., Baptist, I. A. "Preparation and dyeing of fibrous materials", Leningrad: Leningrad state University Publishing house, 1979, 224 S. ).

Determining the concentration of the residual dye in the bath was held on the device CPK-2 by measuring the optical density of the solutions. In examples 1-4 indicators dyed rovings with a redox system hydrogen peroxide-propantriol 1,2,3 (a) are summarized in table.

On the basis of data given in the table, the optimum dyeing conditions should be considered the following: the temperature of 75-80oWith the concentration of the redox system (a) (0,0075+0,015) mol/L.

In examples 5 and 6 were carried out with oxidative dyeing of vosstanovitelnoj dyeing 120 minutes

Example 5 the Rovings were processed as in example 1, but as the redox system used hydrogen peroxide-Polyoxymethylene (b). Figures painted rovings are summarized in table.

Example 6 the Rovings were processed as in example 1, but as the redox system used hydrogen peroxide-hexamethylenetetramine (in). Figures painted rovings are summarized in table.

In examples 7-9 were dying on the proposed method, pure wool fabric, woven fabrics of polyamide fibers, fabrics made from natural silk with the redox system (as). Figures painted samples are shown in the table.

In example 10 was conducted dyeing wool yarn (40% wool + 60% polyamide) using as an intensifier redox system (a) at an optimal concentration. Indicators dyed yarn according to example 10 are summarized in table.

In examples 11-13 held dyeing wool rovings with a redox system hydrogen peroxide-propantriol 1,2,3 (a), hydrogen peroxide-Polyoxymethylene (b), hydrogen peroxide-hexamethylenetetramine (in) at an optimal concentration at a temperature of 75o

In examples 14-16 held dyeing wool rovings with a redox system hydrogen peroxide-propantriol 1,2,3 (a), hydrogen peroxide-Polyoxymethylene (b), hydrogen peroxide-hexamethylenetetramine (in), which was carried out in module 1:50 according to the mode described in example 14.

Example 14 1. The rovings are treated in a solution containing, per cent by weight of the fiber:
Surface-active substance (SAS) non-ionic character (Prevotella WOF-100) - 1
Ammonium sulphate - 4
Acetic acid (30%) - 5-5,5
The redox system (a), mol/l - 0,0075+0,0075
Treatment of 10 minutes at 35-40oC.

2. The introduction of active dye bright red SH
Dyeing 10 minutes

3. Heating to 80oWith 30-40 minutes

4. Dyeing at 80oWith 30 minutes

5. The addition of acetic acid 1/2 of the original amount.

6. Dyeing at a temperature of 80oWith 30 minutes

7. Introduction ammonia solution to pH 8 to 8.5. Processing 15 minutes

8. Cooling and rinsing with warm and cold water for 10-15 minutes

9. The treatment with acetic acid (30%) to a pH of 6.0 to 6.5, 10 minutes

Total time dyeing: 145-160 minutes

In examples 14-16 indicators dyed rovings are summarized in table.

In examples 17-19 held 1,2,3 (a), hydrogen peroxide-Polyoxymethylene (b), hydrogen peroxide-hexamethylenetetramine (in) at an optimal concentration at a temperature of 75oWith the duration of the dyeing is 160 minutes Indicators dyed rovings in examples 17-19 presented in the table.

In example 20 was conducted dyeing wool rovings dye populanon red BL with redox system hydrogen peroxide-propantriol 1,2,3 (a) at an optimal concentration at a temperature of 80oWith the duration of the dyeing is 120 minutes Indicators dyed rovings for example 20 are summarized in table.

Example 20
1. The rovings are treated in a solution containing, per cent by weight of the fiber:
Surface-active substance (SAS) non-ionic character (Octanol OS-20) - 0,5
Ammonium sulphate - 2-4
Acetic acid (30%) to pH 5.5-6
The redox system (a), mol/l - 0,015+0,015
Treatment of 15 min at 30-40oC.

2. Introduction dye safelane red BL.

Dyeing 15 minutes

3. Heating to 80oWith 20 minutes

4. Dyeing at 80oWith 30 minutes

5. The addition of acetic acid (30%) to pH 5.5-6.

6. Dyeing at a temperature of 80oWith 30 minutes

7. Rinsing with warm and cold water in what ucitelem populanon red BL with redox system hydrogen peroxide-propantriol 1,2,3 (a) at a temperature of 75oWith the duration of the dyeing is 130 minutes Indicators dyed rovings for example 21 are summarized in table.

In example 22 was conducted dyeing cotton fabric dye active red 6S with the redox system hydrogen peroxide-propantriol 1,2,3 (a) at an optimal concentration at a temperature of 80oWith the duration of the dyeing is 120 min, the module baths 1:30. Indicators dyed rovings for example 22 are summarized in table.

Example 22
1. Introduction to dyeing bath solutions of chemicals (g/l)
The redox system (a), mol/l - 0,015+0,015
1/2 of the original amount of Glauber's salt - 75
Dye reactive red 6, % by weight of the material - 1
Treatment of 15 min at 30-40oC.

2. Heating to 80oWith 20 minutes

3. The introduction of 1/2 of the original amount of Glauber's salt and 1/2 solution metaphosphate sodium - 15
Processing 15 minutes

4. Introduction 1/2 solution metaphosphate sodium.

Dyeing 60 minutes

5. Rinsing with a solution of TMS (2 g/l), 20 minutes

6. Flushing hot and cold water, 10 min.

Total: 120 minutes

In example 23 held dyeing cotton fabric dye active red 6S with oxidation-reset
With the duration of the dyeing is 120 minutes Indicators dyed rovings for example 23 are summarized in table.

In example 24 was conducted dyeing viscose fabric dye active red 6S with the redox system hydrogen peroxide-propantriol 1,2,3 (a) at an optimal concentration at a temperature of 80oWith the mode described in example 22, the duration of the dyeing is 120 min, the module baths 1:30. Indicators dyed rovings for example 24 are summarized in table.

In example 25 was conducted dyeing viscose fabric dye active red 6S with the redox system hydrogen peroxide-propantriol 1,2,3 (a) at an optimal concentration at a temperature of 75oWith the duration of the dyeing is 120 minutes Indicators dyed rovings for example 25 are summarized in table.

It was established experimentally that the intensity of the color samples of pure wool rovings, dyed at temperatures of 80oWith using as an intensifier redox system hydrogen peroxide-propantriol 1,2,3 (a) the optimal concentration of dye acid Bordeaux in the amount of 0.5% by weight of the fiber close to the intensity of the color obras in the amount of 1% by weight of the fiber. The reflection coefficient of the sample, colored acid Bordeaux to 0.5% by weight of the fiber with the redox system (a) at a temperature of 80oWith equal to 3% and the reflectance of the sample, colored acid Bordeaux 1% by weight of the fiber without the intensifier at a temperature of 100oWith equal to 3%.

The study was conducted dissolution samples polyamide fabric in 85% formic acid, colored with 100oWith no hope and when 80oWith using a redox system hydrogen peroxide-propantriol 1,2,3 (a). Data on the optical density of the solutions and the concentration of dye in solution indicate that the intensity of the color samples dyed with the use of intensifiers in 80oSince, above, than without intensifiers under 100oC.

Based on the above and the data from the table we can conclude that the introduction of a dye-bath 0,0075-0.015 mol/l redox systems (a, b, C) allows to carry out the dyeing process at low temperature (75-80oC).

In the proposed method, an increase in the intensity of coloration of textile materials and their strength indicator, SN is bretania

1. Method of dyeing textile materials which consists in processing the material in the dye bath solution containing the dye and auxiliary substances, in the presence of the intensifier dyeing - oxidant hydrogen peroxide and a reducing agent, characterized in that the dye using acid, acid metal complex or reactive dye, and the dyeing process is carried out at 75-80oWith using as an intensifier dyeing redox system hydrogen peroxide - propantriol 1,2,3 or hydrogen peroxide - hexamethylenetetramine, or hydrogen peroxide - Polyoxymethylene when the mass ratio of components equal to 1: 1 or 3: 1, respectively, and when the concentration of the intensifier dyeing equal 0,0075-0.015 mol/L.

2. The method according to p. 1, characterized in that when used as a textile material, wool, polyamide fibers, or mixtures thereof, or natural silk dyeing process is carried out at the simultaneous introduction of a redox system in the dyeing bath.

3. The method according to PP. 1 and 2, characterized in that the dyeing are within 120-160 minutes

 

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