RU2353723C1 - Method of dyeing triacetate-cellulose fibres - Google Patents

Abstract

FIELD: textiles, paper.

SUBSTANCE: invention relates to dyeing-trimming production and can be used in coloristic making objects from modified, particularly antimicrobial triacetate-cellulose (TAC) fibres. The method of dyeing modified antimicrobial triacetate-cellulose fibres is described, involving putting into spinning solution triacetate-cellulose 8-oxyquinoline, forming fibres from it and processing the newly formed fibre with dispersed yellow 3 dye in perchloroethylene using a periodic method at 50-70°C and module of perchloroethylene dye bath 10 for a period of 55-65 min followed by washing and drying. Correlation of the mass quantities of the modified compound - 8-oxyquinoline in TAC fibres and dispersed yellow 3 dyes in perchloroethylene dye bath is 2-5:1-6.

EFFECT: a deep and resistant to physicochemical action of dye on TAC fibres while preserving their antimicrobial activity.

2 cl, 2 tbl, 4 ex

Description

The invention relates to the field of dyeing and finishing production and can be used in the color design of products from modified, in particular antimicrobial, cellulose triacetate (TAC) fibers.

In modern production, methods are used to obtain dyes on textile materials and deepen their tone on textile materials by forming fibers from spinning polymer solutions in the presence of modifying additives, followed by dyeing of freshly formed fibers or products made from them with known classes of dyes.

It is known to introduce cellulose acetate into a spinning solution before forming 8-hydroxyquinoline films from it in order to give them antimicrobial properties (SU 317660 A1, 1971). However, in the text of this copyright certificate there is no indication of the subsequent processing of the obtained films with a coloring substance.

It is also known to obtain a colored antimicrobial cellulose-containing fiber by pre-impregnating it with an aqueous acetic acid solution of 8-hydroxyquinoline followed by treatment with a copper (II) salt to form a color from yellow to greenish-yellow and brown (RU 2050859 C1, 1995). However, with an aqueous solution of this compound it is not possible to deeply and evenly impregnate TAC fibers, which are chemical artificial hydrophobic fibers. Proceeding from this, it is difficult to ensure the diffusion of 8-hydroxyquinoline molecules deeper into the fibrous substrate during further processing of AC fibers modified in this way by AC salts, which leads to the formation of fragile and unsaturated colors.

The closest in technical essence to the claimed invention is a method consisting in dyeing knitted fabrics that were produced from cellulose diacetate (DAC) fibers containing an antimicrobial preparation β- (5-nitro-2-furyl) acrolein introduced into the spinning solution of DAC (NFA), conventional dispersed dyes (Polishchuk B.O., Wolf L.A., Kotetsky V.V., Brazauskas V.V., Plotkin L.L. Study of the possibility of processing antimicrobial cellulose acetate fibers into various medical devices // But howl in the organization, engineering and technology of textile and light industry: Collection of scientific papers - L., 1975. - T. XVI. - P.101-103).

Its significant disadvantage is the relatively long duration of the process, which leads to the desorption of NFA from the fiber and, as a result, a significant decrease in its biological activity.

The technical problem to which the claimed invention is directed is to give the TAC fibers an even, deep and strong color while maintaining largely their biological activity due to the fact that 8-hydroxyquinoline in the amount of 2-5% by weight is introduced into the spinning solution of cellulose polymer and the subsequent formation of fiber from it, which is subjected to batch treatment with a solution of dye dispersed yellow W in perchlorethylene (PCE) (the ratio of the amounts of 8-hydroxyquinoline and dye disperse meat yellow Z2-5: 1-6) at a temperature of 50-70 ° C and perhloretilenovoy dyebath module 10 for 55-65 minutes, washing and drying.

The specified technical result is achieved in that the method for producing a dyed TAC fiber includes introducing a modifying compound into a cellulose triacetate dope, forming fibers from this solution and dyeing the freshly formed fiber with dye, where 8-hydroxyquinoline is used as the modifying compound, and processing the freshly formed fiber containing 2.0-5.0% by weight of the polymer of 8-hydroxyquinoline, is carried out in a PCE medium according to the periodic method at a temperature of 50-70 ° C and perchlorethylene module dye bath 10 for 55-65 minutes, followed by washing and drying.

In addition, the ratio of the mass amounts of the modifying compound - 8-hydroxyquinoline in the TAC fibers and the dispersed yellow 3 dye in the perchlorethylene dye bath is 2-5: 1-6.

The invention is illustrated by the following examples and tables, which show the indicators of color stability (in accordance with GOST 9733-61) on modified TAC fibers processed by the proposed method, as well as the antimicrobial activity exhibited by dyed modified TAC fibers.

Example 1. The dyeing of freshly formed TAC fibers obtained by introducing a modifying compound, 2% by weight of 8-hydroxyquinoline polymer, into the spinning solution of TAC, is carried out by periodic batch treatment with a solution of dye dispersed yellow 3 in PCE (weight ratio of amounts of 8-hydroxyquinoline and dye yellow 3 2: 1) at a temperature of 50-70 ° С and a module of perchlorethylene dyeing bath 10 for 55-65 minutes, followed by washing for 20 minutes in a solution of a fine detergent with a concentration of 2 g / l at 50-60 ° С, warm (40 ° FROM) and cold (20 ° C) distilled water to remove loose ink. Before treatment with the TAC dye solution, the fibers are light yellow in color, and the modified fibers after washing and drying contain 1.71 g of dye / kg fiber and have a bright yellow color.

Example 2. The dyeing of freshly formed TAC fibers obtained by introducing a modifying compound, 3.5% by weight of 8-hydroxyquinoline polymer into the TAC spinning solution, is carried out by periodic batch treatment with a solution of dispersed yellow 3 dye in PCE (weight ratio of 8-hydroxyquinoline and dispersed dye yellow З 3,5: 1) according to example 1, followed by washing according to example 1. After washing and drying, the fibers contain 1.83 g of dye / kg of fiber and are painted in an intense yellow-green color.

Example 3. The dyeing of freshly formed TAC fibers obtained by introducing a modifying compound — 5% by weight of 8-hydroxyquinoline polymer into the spinning solution of TAC — is carried out by periodic batch treatment with a solution of dye dispersed yellow 3 in PCE (weight ratio of amounts of 8-hydroxyquinoline and dye yellow dispersed 3 5: 3) according to example 1, followed by washing according to example 1. After washing and drying, the fibers contain 1.94 g of dye / kg of fiber and are colored yellow.

Example 4. The dyeing of freshly formed TAC fibers obtained by introducing a modifying compound — 5% by weight of 8-hydroxyquinoline polymer into the spinning solution of TAC — is carried out by periodic batch treatment with a solution of dye dispersed yellow 3 in PCE (weight ratio of amounts of 8-hydroxyquinoline and dye yellow dispersed 3 5: 6) according to example 1, followed by washing according to example 1. After washing and drying, the fibers contain 2.05 g of dye / kg of fiber and are painted in an intense yellow-green color.

As can be seen from tables 1 and 2, the use of the proposed method for dyeing TAC fibers containing 2.0-5.0% 8-hydroxyquinoline, in comparison with the existing technical and economic advantages:

a) provides good uniformity of dyeing and high strength characteristics of the coatings;

b) contributes to the preservation of a significant degree of biological activity;

c) high brightness of colors is achieved;

g) the duration of the dyeing process is reduced to 55-65 minutes;

d) the use of perchlorethylene allows the dyeing process to be carried out in a closed cycle without discharge into the sewer of spent solutions;

e) the dyeing temperature decreases.

The optimal concentration of the introduced modifying additive - 8-hydroxyquinoline in the spinning solutions of cellulose triacetate is in the range of 2.0-5.0% by weight of the polymer, and its further increase in the spinning solutions, as well as the variation of the above parameters of the dyeing process of freshly formed fibers practically does not affect on the indicators of color stability and antibacterial activity of dyed 8-hydroxyquinoline-containing TAC fibers.

Table 1
Indicators of color stability on modified TAC fibers, obtained according to examples 1-4, to various physicochemical effects Physicochemical effects Non-examples and color fastness, points one 2 3 four Shine 6-7 7 6-7 7 Light and weather 6-7 7 6-7 7 Distilled water 5/5/5 5/5/5 5/5/5 5/5/5 "Sea water" 5/5/5 5/5/5 5/5/5 5/5/5 Soap solution at 40 ° C 5/5/4 5/5/5 5/5/4 5/5/5 Wash at 60 ° C 5/5/5 5/5/5 5/5/5 5/5/5 Flue gas 5 5 5 5 Sublimation:
120 ° C, 80 min
210 ° C, 30 sec
210 ° C, 60 sec 5/5/5
5/5/5
5 5/5/5
5/5/5
5 5/5/5
5/5/5
5 5/5/5
5/5/5
5 Ironing
dry
wet 5
5/5 5
5/5 5
5/5 5
5/5 Friction
dry
wet 5
5 5
5 5
5 5
5

table 2
Antibacterial activity of 8-hydroxyquinoline-containing TAC fibers stained with disperse yellow 3 dye in a PCE medium (with a bath module 10 ^* ) The content of 8-hydroxyquinoline in the fiber,% by weight of the polymer The dye concentration in the perchlorethylene dye bath,% by weight of fiber Dyeing conditions The zone of growth inhibition of test cultures (including the diameter of the hole, equal to 10 mm), mm * T, ° С τ min Salmonella typhimurium 362 b / o Staphylococcus aureus 209 P 2.0 one 60 60 15.3 / 28.7 10.7 / 18.8 3,5 one 60 60 18.1 / 17.2 10.8 / 23.9 5,0 3 60 60 17.7 / 17.0 11.3 / 22.8 5,0 6 60 60 19.1 / 17.0 12.1 / 22.8 * Note. Numerator - the antimicrobial effect shown by fibers after dyeing;
the denominator is the antimicrobial effect exhibited by unpainted fibers.

Claims (2)

1. A method for dyeing modified antimicrobial cellulose triacetate fibers, comprising introducing a modifying compound into a cellulose triacetate dope, forming the fiber therefrom and treating the freshly formed fiber with disperse yellow dye 3, characterized in that 8-hydroxyquinoline is used as the modifying compound, and the processing of the freshly formed fiber containing 2.0-5.0% by weight of the polymer of 8-hydroxyquinoline, is carried out in perchlorethylene medium according to the periodic method at a temperature of 50-70 ° C and the module perchlorethylene dye bath 10 for 55-65 min, followed by washing and drying. 2. The method according to claim 1, characterized in that the ratio of the mass amounts of the modifying compound - 8-hydroxyquinoline in cellulose acetate and dye dispersed yellow 3 in a perchlorethylene dyeing bath is 2-5: 1-6.