RU2103432C1 - Method of cellulose-containing textile materials after dyeing or printing - Google Patents

Abstract

FIELD: textile industry. SUBSTANCE: invention relates to finishing stage of textile production and may be used for washing textile materials dyed and printed by various-type dyes. Material is treated in cold and hot water and in aqueous composition containing, as surfactant, mixture of syntatol, asparal F, and phenoxol 9/10BV at ratio 1:1.6:1.1 in amount 0.5-1.5 g/l at temperature 70-75 C. EFFECT: essentially reduced consumption of heat energy and textile auxiliary substances due to considerably lowered temperature of wash water and intensification of surfactant effect. 2 cl, 1 tbl

Description

 The invention relates to the field of finishing production of the textile industry and can be used for washing textile materials dyed or printed by various classes of dyes, such as vat, active, dispersed and azo dyes.

 Washing textile materials after dyeing and printing is one of the most important, time-consuming and obligatory operations in the technological process of processing fabrics. The purpose of washing is the complete removal of unfixed dye, various minerals, thickener from the fabric, as well as a certain effect on the physicochemical state of the dye in the fiber, leading to increased brightness, saturation, and color stability.

 There are various methods of washing dyed or printed fabrics, based on mechanical, physical or physico-chemical effects on textile material [1].

 The essence of these methods is the sequential alternation of washing the material with cold and hot water and solutions of detergents. Depending on the class of dyes, oxidizing agents, alkaline agents and other textile auxiliary substances can be added to the washing baths.

 The disadvantages of these methods is the possibility of re-adsorption of the washed dye when using high temperature, the danger of lightening color and environmental degradation when using dry concentrations of detergents.

A known method of washing cellulose-containing textile materials after printing with active dyes, including washing with cold and hot water and an aqueous solution of a surfactant mixture based on alkali metal salts of fatty acids of fraction C ₇ - C ₁₈ with a concentration of 0.5 - 1.0 g / l [2 ].

 The known method requires higher washing temperatures and, therefore, energy-intensive, as well as non-universal.

Closest to the invention in technical essence is a method of washing cotton fabric dyed with active dyes. This method includes washing with running cold water at 20 - 25 ^° C, washing with warm water at 40 - 45 ^° C, washing with hot water at 70 - 80 ^° C, washing in two baths with hot water at 90 - 100 ^° C, containing 2 g / l of detergent and 2 g / l of tripolyphosphate, washing with cold water at 18 - 25 ^o C [3].

 The main disadvantages of this method are the high energy intensity due to the use of elevated temperatures, primarily in bathrooms containing detergent, and high concentrations of textile auxiliary substances used.

 The objective of the invention is to reduce the consumption of textile auxiliary substances and thermal energy by significantly reducing the temperature of the wash water and enhancing the action of surfactants.

The problem is achieved by washing the cellulose-containing materials after dyeing or printing by treating them with cold and hot water, an aqueous composition containing a surfactant, which is used as a mixture of syntanol BV, asparal F and phenoxol 9/10 BV at a ratio of 1: 1, 6: 1.1 in an amount of 0.5 - 1.5 g / l, while maintaining a temperature of 70 - 75 ^o C. Textile materials after printing or dyeing with vat dyes after treatment with cold water are additionally treated with an oxidizing agent and again cold oh water.

 Syntanol BV based on alkylpolyoxyethylene glycol compounds TU 6-36-5744684-85-90.

 Asparal F based on sodium salts of derivatives of aspartic acid TU 6-36-16-0-90.

 Phenoxal 9/10 BV based on acetalalkylphenylpolyoxyethylene glycol TU 6-36-70-0-91.

Distinctive features of this method are:
use as a washing composition of a mixture of surface-active substances Sintanol BV, asparta F, phenoxol 9/10 BV in the following ratio of components: 1: 1.16: 1.1;
the use of a washing composition in a concentration of 0.5 to 1.5 g / l;
maintaining the washing temperature in a solution of detergent 70 - 75 ^o C.

The specified ratio of surfactants in the composition of the detergent composition leads to the appearance of a synergistic effect, which ultimately allows the washing process to be performed at a relatively low temperature of water (70 - 75 ^o C) and low concentrations of the mixture (0.5 - 1.5 g / l ) In addition, when washing fabrics printed or stained with hydroxyazo dyes, a better washing of the azo component is observed. The concentration of the washing composition of 0.5 g / l is the minimum necessary in order to ensure high-quality washing results in accordance with the requirements of normative and technical documentation. Increasing the concentration of the detergent composition above 1.5 g / l is not economically feasible. Also from the point of view of reducing energy consumption, it is impractical to use in this case, the washing temperature above 75 ^o C.

 The invention is illustrated by the following examples (1 - 7).

 Example 1

Washing cotton fabric printed with active dyes - active bright red 6C:
1 bath - cold water 20 - 25 ^o C
2 bath - warm water 40 - 50 ^o C
3 bath - hot water 70 - 80 ^o C
4 and 5 baths - an aqueous composition with the above ratio of surfactant 1 g / l at 70 ^o C
6 and 7 baths - hot water 70 - 80 ^o C
8 bath - cold water 18 - 25 ^o C
The aqueous composition of the detergent composition is prepared as follows: syntanol BV, asparal F, phenoxol 9/10 BV are successively added to water at 25-30 ^° C with the following ratio of 1: 1.6: 1.1. Then the composition is stirred for 20 minutes, after which it is ready for use.

Example 2
The washing conditions are similar to example 1, but the ratio of the components in the washing composition is 1: 1: 1.1.

Example 3
The washing conditions are similar to example 1, but the fabric is printed with active bright red 6C in rapport with diazole blue O on azotol A.

Example 4
The washing conditions are similar to Example 1, but the cotton-lavsan fabric containing 67% polyester and 33% cotton is printed with dispersed red 2C and active bright red 6C.

Example 5
The washing conditions are similar to example 1, but the concentration of the detergent composition is 0.5 g / l.

Example 6
The washing conditions are similar to example 1, but the temperature of the aqueous solution of the detergent composition is 75 ^o C.

Example 7
The washing conditions are similar to example 1, but the ratio of the components of the detergent composition is 1: 1.6: 0
Example 8
The washing conditions are similar to example 1, but the ratio of the components in the washing composition is 1: 0: 1.1.

Example 9
The washing conditions are similar to example 1, but the ratio of the components in the washing composition is 0: 1.6: 1.1.

Example 10
The washing conditions are similar to example 1, but the concentration of the detergent composition is 2.0 g / l.

Example 11
The washing conditions are similar to example 1, but the ratio of the components in the washing composition is 1: 1.6: 0, and the temperature of its aqueous solution is 90 ^o C.

Example 12
Washing cotton fabric dyed with vat dye - vat bright green LED:
1 bath - cold water 10 - 20 ^o C
2 bath - cold water with an oxidizing agent 10 - 25 ^o C
3 bath - cold water 10 - 20 ^o C
4 bath - hot water 60 - 70 ^o C
5 and 6 baths - detergent preparation 1 g / l 70 ^o C
7 and 8 baths - warm water 40 - 50 ^o C.

Example 13 (prototype)
Washing cotton fabric printed with active dye - active bright red 6C:
1 bath - cold water 20 - 25 ^o C
2 bath - warm water 40 - 50 ^o C
3 bath - hot water 70 - 80 ^o C
4 and 5 baths - detergent 2 g / l and tripolyphosphate 2 g / l, 90 - 100 ^o C
6 and 7 baths - hot water 70 - 80 ^o C
8 bath - cold water 20 - 25 ^o C.

 Example 14 is similar to example 1, but the fabric is printed active turquoise 2 3T.

 Example 15 is similar to example 1, but the fabric is printed with direct yellow light-resistant 2K.

 Example 16 is similar to example 1, but the fabric is dyed sulphurous black.

 Tests of strength indicators of color after washing were carried out in accordance with GOST 9733-83.

 The results are presented in the table.

 The data presented indicate that the strength indicators of dyeing for all examples, with the exception of examples 2, 7, 9, and 11, correspond or even exceed those achieved by the prototype and at the same time fit into the GOST standards for different groups of fabrics. In examples 2, 7, 9, and 11, the ratio of the components of the detergent composition was changed, which led to the disappearance of the synergistic effect and, as a result, to a deterioration in the washing of the non-fixed dye, and a decrease in the strength characteristics of the color.

Claims (2)

1. The method of washing cellulose-containing textile materials after dyeing or printing by treating with cold and hot water, an aqueous composition containing a surfactant, characterized in that as a surfactant using a mixture of syntanol BV based on alkylpolyoxyethylene glycol compounds, Asparal F based sodium salts of derivatives of aspartic acid and Phenoxol 9/10 BV on the basis of acetalalkylphenylpolyoxyethylene glycol in a ratio of 1 1.6 1.1 in an amount of 0.5 to 1.5 g / l at a temperature processing 70 75 ^o C.  2. The method according to p. 1, characterized in that after dyeing or printing with vat dyes after treatment with cold water, the textile material is additionally treated with an oxidizing agent and cold water.

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