RU2196196C1 - Cellulose-containing fabric dyeing method - Google Patents

Abstract

FIELD: textile industry. SUBSTANCE: method involves using biological preparation for decomposing of polysaccharides - thermally active endothermically effective ferment selected from the group comprising endo-1,4-α-D-glucan-glucanohydrolase, endo-1,4-β- glucanase and endoalginate lyase in an amount of 0.01-0.1% by weight of coloring compound; drying fabric with applied dyeing compound at 80-120 C; providing fixing treatment at temperature of 100-600 C. Method allows process cycle time to be reduced from 24.3-24.5 hours to 0.4-0.6 hour, enables uniform and patterned dyeing of single filament and mixed filament fabrics comprising natural and regenerated cellulose filaments. Dye fixation extent is increased up to 78.8093.3%, dye intensity is increased by 5-16%, physicochemical test stability of tints reaches 4-5 numbers, and whiteness index of colorless portions of pattern reaches 78.4-84.8%. EFFECT: wider range of used dyes and improved quality of colored fabrics. 1 tbl

Description

Introduction
The invention relates to the textile industry, and in particular to the technology of coloring of textile materials containing cellulose fibers.

State of the art
All known methods for continuous coloring of textile materials include a number of sequential technological operations:
- applying a coloring composition containing, along with the dye, a complex of excipients;
- drying the fabric to remove excess moisture;
- fixation treatment to ensure the diffusion of dyes deep into the fiber and interaction with its active centers;
- flushing to remove unfixed dye and excipients
[Krichevsky G.E., Korchagin M.V., Senakhov A.V. Chemical technology of textile materials. - M .: Legprombytizdat, 1985. - P.244-538; Finishing cotton fabrics. In 2 hours, part 1. Technology and assortment of cotton fabrics: Handbook / Ed. B.N. Melnikova. - M .: Legprombytizdat, 1991.- S. 135-329]. The ultimate goal of coloring is to obtain a color with a given coloristic characteristic (color intensity, color, shade) and stability under the conditions of use of a textile product.

To obtain high-quality coloring effects, the coloring composition contains, along with dyes, a certain complex of auxiliary substances, including:
- substances for regulating the distribution of the dye in the tissue structure (electrolyte additives, dispersants, wetting agents, anti-migration substances, thickeners, etc.);
- substances for fixing the dye (pH regulators, fiber plasticizers, diffusion intensifiers, reducing agents, binders, etc.).

 The application of the coloring composition is carried out by methods of uniformly impregnating the fabric cloth in a solution or by printing local fragments of patterned colors. Tissue drying is carried out either without heating or at elevated temperatures. Fixation processing is also carried out either by the “cold” method, or by using saturated or superheated steam or “dry” heating methods in a medium with various heat supply options (contact, convection, radiation, high-frequency dielectric heating). Sometimes drying and fixation operations are combined to reduce the energy intensity of the process. This is possible with the implementation of plus-rolling, and locking or heat setting methods of coloring. Tissue washing is carried out by sequential treatment in water baths with different temperatures using additives of detergents, redox agents, etc. It is known to use non-aqueous media and mixed solvents to improve flushing quality.

When using dye compositions containing polymer thickeners both for plain dyeing, for example, cellulose-polyester fabrics, and for patterned coloring of materials, washing processes are complicated by the fact that part of the dye remains in the thickener film and is not redistributed into the fiber, in addition, the film a thickener prevents the release of unfixed dye from the fiber. In this regard, washing is carried out at elevated temperatures (80 ... 100 ^o C) using effective auxiliary detergents and intensive hydrodynamic effects [Progress of techniques and fabric printing technology // B.N. Melnikov, I. B. Blinicheva, G I. Vinogradova et al. - M.: Light Industry, 1980.- S. 184-202; SU 1640243 Al, D 06 B 3/20, publ. 04/07/91].

However, thickeners are rather difficult to remove during washing, which leads to unstable color indicators, a change in the intensity and brightness of dyes during household processing of textiles, and a deterioration in the strength indices for physicochemical effects. In particular, after washing at 80 ^o C for 4 minutes, 8 ... 10% sodium alginate remains on the fabric, and the amount of undeleted thickener based on carboxymethyl cellulose or starch is 4.. .5 times larger [Kretschmer A. Melliand Textilberichte, 1972, Bd. 45, 1, - s. 67-79; Krichevsky G.E., Arshinova N.Z. Washing of textile materials dyed and printed with active dyes. M .: TSIITEIlegprom, 1973.- P.24].

It is known to use enzyme biological products to intensify the washing of textile materials in coloring processes. In particular, a method for removing thickener of printing paste and excess dye after printing on textiles [PCT application 92/16685, D 06 P 5/00, D 06 M 16/00, C 12 S 11/00, publ. 10/01/92] provides for washing in the presence of an enzyme of suitable substrate activity. The enzymatic decomposition of the thickener reduces the duration of the washing process, the energy and water costs necessary for satisfactory textile quality. It is known the use of additives in the rinse bath of celloviridin GZx [Kiverene Yu.Yu. et al. Proceedings of the Kaunas Institute of Technology, 1991. - S. 9] or Glucavamorin GZh [Pat. RF 2146735, IPC D 06 L 1/16, publ. 03/20/2000, BI 8]. In this case, the fabric is first impregnated at a temperature of ≤40. . .50 ^o With a solution containing the enzyme preparation, then washed in warm (40 ... 50 ^o C) and hot (≥70 ^o C) baths. Enzymes are capable of catalyzing the cleavage of the corresponding polymeric thickeners (cellulose ethers or starch), to ensure a more complete extraction of these substances and non-fixed dyes.

However, in the conditions of short-term processing on in-line washing equipment, the effective destruction of thickeners does not occur. After 10 minutes of treatment at 40 ^o With the degree of conversion of starch polymers glucavamorin does not exceed 18 ... 20%. However, it must be borne in mind that such drugs are inactivated at elevated temperatures (≥60 ^o C), and processing at a moderate temperature is only 1. ..3 min. In addition, the effective adsorption of enzymes by textile material occurs only in the absence of the corresponding polymers and intermediates of their destruction in the impregnating solution, that is, only at the initial moments of the impregnation process with freshly prepared enzyme solutions. As oligomers desorbed from the tissue accumulate in the bath, an increasing part of the enzymes will interact with the extracted substrate fraction, thereby deteriorating the washing result of the newly incoming textile material. Therefore, the introduction of enzymes into the wash baths does not provide stable washing results.

 It is known [SU 1636494 Al, D 06 P 3/42, D 06 P 3/48, D 06 L 1/12, publ. 03/23/91] the use of reducing agents in the washing baths to destroy the unfixed dye, if the washing conditions do not allow to ensure the completeness of its extraction. For this purpose, in particular, sulfur-containing compounds are used: bisulfite (sodium thiosulfate), hydrosulfite (sodium dithionite), etc. However, in this case, a large amount of toxic sulfur-containing substances is released into the air of industrial premises and into wash water.

 It is known to use enzyme biologics to improve the coloring of textile materials. For example, peroxidase enzymes are used after peroxide bleaching to remove peroxide residues on the fiber, which prevent high-quality colorization [FR 2627517 Al, D 06 L 3/02, D 06 M 16/00, D 06 P 1/00, publ. 08/25/89]. However, these biological products do not affect the quality of washing the material as the final stage of coloring.

 A known composition for dyeing harsh fabrics containing cellulose fibers [US Pat. RF 2123074, IPC D 06 B 3/00, D 06 P 3/66, publ. 12/10/98, BI 34]. As you know, an auxiliary substance is applied to the main threads of a harsh fabric, which ensures a reduction in yarn breakage during weaving, namely a dressing based on starch polysaccharides. The dressing prevents high-quality dyeing of fabrics. The composition includes an active dye, substances for regulating the distribution of the dye (wetting agent NB or OP-10), a substance for securing the dye (calcined soda), an enzyme biological product amylomesenterin G5x for splitting starch dressing on warp threads and to obtain better tinting results and 0.5 ... 1 g / l sodium thiosulfate for reductive degradation of unfixed dye. In this case, washing is carried out only in water baths without additives.

However, this method is not without drawbacks. Firstly, amylomesenterin G5x does not have sufficient stability at elevated temperatures, especially in an alkaline environment, necessary for fixing the dye. Therefore, the fixation treatment is carried out at temperatures not higher than 50 ^o C for several hours, and under these conditions, unproductive loss of dye as a result of hydrolysis, as drying of the tissue and fixation of the dye are combined, as well as in connection with the interaction of the dye with the oligosaccharides formed during the enzymatic cleavage of the dressing. To reduce the intensity and brightness of the color leads to premature restoration of the dye under the action of sodium thiosulfate to complete the fixation process. In addition, according to the current opinion [Progress of machinery and technology for printing fabrics // B.N. Melnikov, I.B.Blinicheva, G.I. Vinogradova and others. - M .: Light Industry, 1980.- P. 185] without the use of detergents in washing processes cannot ensure complete removal of contaminants from the fibrous material, including tinted starch products of partially destroyed dressing, because colloidal particles with a size of less than 1 μm cannot be peptized with only one mechanical action, since the adhesion forces between the adsorbed particles of a polluting agent and the fibrous material are much greater than the forces arising from fluid shear.

 The introduction of amylomesenterin G5x and sodium thiosulfate proposed in this technical solution is unacceptable in cases of coloring using thickening polymers (for example, when dyeing cellulose-polyester fabrics with active and dispersed dyes) due to the constant change in the rheological properties of the composition and unstable results of applying it to textile materials.

Closest to the invention is a combined method of desizing and dyeing of textile materials with active dyes [US 4371372 A, D 06 P 1/44, 3/66; publ. 02/01/83], including the following operations:
1) applying to the material a coloring composition containing:
- dye
- substances for regulating the distribution of the dye in the structure of the fabric,
- substances to ensure fixation of the dye,
- a biological product for the breakdown of polysaccharides of starch dressing, which, as an auxiliary substance, is applied to the warp;
2) fixation processing of the material;
3) flushing.

As the coloring matter, only active dyes are used. Wetting agents (for example, ethoxylated polyphenol) and urea are used as substances that promote the distribution of dyes in the structure of tissue. Alkaline agents from the group of caustic soda, potash, sodium carbonate or bicarbonate, phosphates, borates, alkali metal silicates, alkali metal hydroxide esters and mixtures thereof are used as auxiliary substances for fixing dyes. As a biological product use "Bactosol TK" (f. Sandoz, Switzerland) or "Bactamyl" (f. Gist-Brocades, Holland) with amylolytic enzymes active at pH above 8.5. While the biological product and the dye composition can be applied to the fiber separately or together, the latter is more preferable. The concentration of the biological product is 5 ... 7 g / l. Fixation treatment is carried out without preliminary drying of the material, moistened to a weight gain of 70%, the temperature of the fixation treatment is 20 ... 40 ^o C. Due to the low temperature stability of the biological product, the treatment temperature is preferably maintained at no higher than 30 ^o C. The required duration of fixation is 24 hours. Washing includes treating with cold, hot (70 ^o C) water, soap and again with cold water. The method provides for the removal of starch impurities and the fixation of active dyes on the fiber.

 The disadvantages of the known coloring method are the long duration of the process, the inability to obtain patterned coloring of the material, the limited range of dyes used, the low quality of the colors due to unproductive dye losses due to hydrolysis and reaction with degradation products of starch dressing, the film of which prevents the interaction of dyes with fiber. The degree of fixation of the dye is not higher than 70%. The resulting colors do not differ in high rates of intensity and brightness, and the color fastness to wet friction does not exceed 3 points. The intensification of fixation processes due to temperature increase is impossible due to the inactivation of the used biological products. For this reason, coloring with dyes fixed at elevated temperatures is not possible.

SUMMARY OF THE INVENTION
The objective of the invention is to find a method for coloring the cellulose-containing tissues by applying to the fabric a dye composition containing a dye, at least one substance for regulating the distribution of the dye in the fabric structure, at least one substance for fixing the dye and a biological product for cleaving polysaccharides of the auxiliary substance by fixation treatment fabric and washing, which provides a reduction in processing time, expanding the range of products and improving its quality VA due to an increase in the degree of fixation of dyes, the intensity of color and its strength to physico-chemical influences, increasing the purity of the white background of patterned colors.

The problem is solved in that in the method of coloring the cellulose-containing fabrics by applying to the fabric a dye composition containing a dye, at least one substance for regulating the distribution of the dye in the fabric structure, at least one substance to ensure fixation of the dye and a biological product for splitting polysaccharides auxiliary substance, fixative tissue treatment and washing, as a biological product use a thermoactive enzyme of endoactivity selected from the group including endo-1,4-α-D-glu en-glucanohydrolases, endo-1,4-β-glucanase and endoalginatliazu in an amount of 0.01 ... 0.1% by weight of the ink composition, the fabric is coated with a dye composition was dried at 80 ... 120 ^o C, and the fixation the processing is carried out at a temperature of 100 ... 160 ^o C.

Thus, the biological product used must simultaneously satisfy three requirements:
- belong to the number of enzymes with the properties of cleaving polysaccharides,
- belong to the group of endoenzymes acting on the middle sections of the macromolecules of a cleavable polysaccharide,
- Be active at high temperatures.

 The invention allows to reduce the duration of the technological cycle of tissue processing from 24.3 ... 24.5 hours to 0.4 ... 0.6 hours, to carry out both smooth dyeing and patterned coloring of monofilament and mixed fabrics containing natural and regenerated cellulose fiber, expand the range of dyes used, increase the degree of fixation of dyes to 78.8 ... 93.3%, increase the intensity of dye by 5 ... 16%, get colors with resistance to physical and chemical tests of 4-5 points and whiteness indicators unpainted patches of patterned astsvetki 78.4 ... 84.8%.

Information confirming the possibility of carrying out the invention
To implement the method, dyes are used that belong to the classes of active, vat and insoluble oxyazo dyes, as well as a mixture of active and dispersed dyes when coloring fabrics from a mixture of cellulose fibers with synthetics.

 As substances that facilitate the distribution of dyes in the tissue structure, electrolyte additives (e.g., sodium chloride), dispersants (e.g., NF dispersant, urea), wetting agents (e.g., ethoxylated polyphenol, neonol 9-10), and anti-migrants (e.g. Glauber's salt) and thickeners (for example, based on starch, cellulose ethers and alginate). As adjuvants for the fixation of dyes, pH regulators are used (for example, caustic soda, sodium carbonate or bicarbonate, potash, phosphates, borates, alkali metal silicates, alkali metal hydroxide esters and mixtures thereof, acetic acid and its salts), fiber plasticizers and diffusion enhancers (e.g., urea, glycerin), reducing agents (e.g., rolgalite, hydrosulfite, ludigol).

As a biological product for the breakdown of excipients polysaccharides, the coloring composition contains a thermoactive endoactive enzyme:
- endo-1,4-α-D-glucan-glucanohydrolase (K.F. 3.2.1.1), for example, bacterial strains from the All-Russian collection of industrial microorganisms (VKPM) GosNII Genetics Bacillus subtilis B-4646, B-4647, B-4658 , B-4676, B-4766, B-4854 or, for example, the imported drug "Thermamyl" of the company "Novo-Nordisk" (Denmark) [prospectus of the company];
- endo-1,4-β-glucanase (K.F. 3.2.1.4), for example, bacterial strains of Clostridium thermocellum [Cornet D. et al. Characterization of two CEL (Cellulose degradation) genes of Clostridium thermocellum coding four endoglucanases // Bio / Technology, 1983, 9, p.12-20], Cellulomonas flavigena B-2559 from VKPM GosNIIGenetika or, for example, the drug Pectofoetidin P10x (TU 64 -13-04-87);
- endoalginate lyase (K. F. 4.2.2.3), for example, strains of Bacillus stearothermophilus NRRL B-18394 [US 5139945, C 12 N 9/88, 1/20; publ. 08/18/92]; Euterobacter cloacea M-1 [Biosci., Biotechnol. and Biochem., 1995, 59, 4, p. 632-637].

 Enzyme biologics can be used in the form of dry immobilized forms, stabilized liquid products or fresh filtrates of culture liquids.

 Processing is mainly carried out on fabrics that have undergone a cycle of preparation for dyeing and printing, as well as severe canvases. In the case of patterned coloring or dyeing of prepared tissues, the action of the biological product is aimed at splitting the polysaccharide of thickeners of the coloring composition. When coloring harsh canvases, the biological product affects the polysaccharides of starch dressing, applied as an auxiliary substance to the warp threads in weaving.

 The application of coloring compositions is carried out by impregnation methods in a dyeing solution or printing using copper engraved shafts and mesh patterns. Drying of the tissue is carried out, for example, by convective heating, and for fixation treatment, steaming with saturated or superheated steam, as well as “dry” high-temperature heating are used. The washing of the fabric is carried out according to the regimes generally known for the dyes used.

Qualitative indicators of coloring were evaluated in accordance with generally accepted and standard methods:
- the degree of fixation of the dye by the colorimetric method for assessing the color of sulfate sols of a coloring matter dissolved from fiber on a Spekord M-40 device with respect to the ratio of dye content after washing to the applied amount;
- the intensity of the dyeing by photometry on a FT-2M textile photometer with the calculation of the K / S indicator according to the Kubelka-Munk formula;
- strength indicators of stains to physico-chemical effects according to GOST 9733-61;
- the whiteness of the white background of the pattern according to GOST 18054-72 on a FT-2M textile photometer.

The invention is illustrated by the following examples:
Example 1

Harsh cotton fabric calico art. 133 is dyed with active dyes using 0.1% by weight of the coloring composition of the cultivation product of the bacterial strain Bacillus subtilis B-4646, containing thermoactive endo-1,4-α-D-glucan-glucanohydrolase, with an activity index of 80 ^o C 1800 units ./ml. The fabric is impregnated at 40 ^o With a solution, which includes. g / l:
Active Purple 4K - 5
Sodium Carbonate - 10
Urea - 100
Neonol wetting agent AF 9-10 - 1
Biological product - 1
The degree of extraction is 100%. The fabric is dried in an oven at 80 ^{° C.} for 10 minutes and subjected to heat treatment at 140 ^{° C.} for 3 minutes. Then the fabric is washed with cold and hot (70 ^o C) water, washed with a solution of CMC "Talca" 2 g / l (80 ^o C) and again washed with hot (80 ^o C) and cold water. The total duration of the process τ _total = 0.5 hours.

 Received fabric with a bright purple color. The degree of fixation of the dye is 87.3%. The color intensity indicator K / S = 6.27. Color fastness to dry friction is 5 points, wet friction is 4-5, to wet wiping 4-5, to soap 4-5 / 5/5, to sweat 4-5 / 5/5.

For comparison, dyeing was carried out according to the conditions of the prototype method, i.e. using the biological product "Bactosol TK" at a concentration of 5 g / l, with knurling the fabric into a roll for fixation treatment (without preliminary drying) by exposure at 20 ^o C for 24 hours. Washing was carried out according to the above mode. The obtained color is inferior in characteristics to the degree of fixation of the dye, the intensity and resistance to household treatments.

 Quantitative results are shown in the table.

 Example 2

Prepared cotton towel art. 4575 from the assortment of OAO Kokhmatekstil are patterned with a two-shaft pattern with active dyes. The coloring composition contains, as a biological product, endo-1,4-β-glucanase of the strain Cellulomonas flavigena B-2559 in the form of a filtrate of the culture fluid with an activity at 80 ^{° C. of} 5300 u / ml in an amount of 0.04% by weight of the composition.

Composition of printing ink (g / kg):
1 shaft
Active bright red 6C - 20
Ludigol - 10
Sodium Bicarbonate - 10
Urea - 50
Biological product - 0.4
Hot (50 ^o C) water - 359
Thickener based on 3% methylcellulose - Up to 1000
2 shaft
Active green 4Zh - 20
Ludigol - 10
sodium bicarbonate - 10
Urea - 50
Biological product - 0.4
Hot (50 ^o C) water - 359
Thickener based on 3% methylcellulose - Up to 1000
The fabric is dried with hot air at 120 ^{° C.} for 5 minutes and subjected to fixation treatment with superheated steam at 120 ^{° C.} for 4 minutes. The washing is carried out with cold and hot (70 ^o C) water, a solution of CMC "Talka" 2 g / l (80 ^o ), hot (80 ^o C) and cold water. The total duration of the process τ _total = 0.4 hours.

Get a fabric with high brightness and color intensity of the stained areas and an unpolluted white background. The degree of fixation of dyes 78.8 ... 82.3%; K / S _Red = 4.25; K / S _green = 3.75; the degree of whiteness of unpainted areas B = 84.7%. Color fastness to wet friction is 4-5 points, to wet wiping 4, to soap 4-5 / 5/5, to sweat 4/5/5.

For comparison, colorization was carried out under identical conditions, but using 0.04 wt.% Celloviridine G3x, a biological product that has the ability to cleave the thickener polysaccharide, but containing enzymes, firstly, exodication, and secondly, active at a temperature of only 20 ... 60 ^o C. The colors are characterized by low clarity of the contours, lower intensity, back-filling of unpainted areas and low color fastness to physical and chemical tests.

 Quantitative results are shown in the table.

 Example 3

Viscose staple fabric art.72110 after preparation for dyeing and preliminary impregnation with a solution of azo component (10 g / l azotol A, 16.4 g / l NaOH 35%, 1.5 g / l sodium hexametaphosphate) is printed with a composition based on a diaz component thickened with starch thickening and containing as a biological product an enzymatic filtrate of the bacterial strain Bac. subtilis B-4766 with an activity index of thermoactive endo-1,4-α-D-glucan-glucanohydrolase at 100 ^{° C.,} 2400 units / ml. Composition of printing ink, g / kg:
Crimson diazole K (20%) - 30
Acetic acid (60%) - 10
Sodium Acetate - Until Neutral to Congo Indicator Paper
Biological product - 0.8 (i.e. 0.08 wt.%)
Warm (40 ^o C) water - 150
Thickener - Up to 1000
The fabric is dried in a convective dryer at 100 ^o C for 4 ... 5 min and passed through a shooter for fixation treatment with steam at 102 ... 103 ^o C for 3.. .4 minutes Then the fabric is thoroughly washed to remove nitrogen and non-fixed components of the printing ink in 9 baths:
1 - cold running water;
2 - hot water (55 ± 5 ^o C);
3 - NaOH solution of 2 g / l (75 ± 5 ^o C);
4.5 - a solution of CMC "Talka" 2 g / l (75 ± 5 ^o C);
6-8 - hot water (75 ± 5 ^o C);
9 - warm water (35 ± 5 ^o C).

The total duration of the process τ _total = 0.5 hours.

 Get a fabric with a bright and intense coloring of the stained areas and an unpolluted white background. The degree of fixation of the dye is 88.4%; K / S = 3.45; the degree of whiteness of unpainted areas B = 78.4%. The color fastness to dry friction is 5 points, to wet friction is 4-5, to wet wiping 4, to soap solutions 4-5 / 5/5 and sweat 4-5 / 5/5.

For comparison, colorization was carried out under identical conditions, but using glucavamorin G3x, a biological product that has the ability to break down starch polysaccharides, but containing the enzyme, firstly, exodication, and secondly, active at a temperature of only 20 ... 60 ^o C. The colors are characterized low clarity of the contours due to dilution of the printing ink under the action of the enzymatic preparation, backfill of unpainted areas, lower intensity and low color fastness to physicochemical tests.

 Quantitative results are shown in the table.

 Example 4

Cotton polyester fabric "Flute" art. 975 (67% cotton, 33% polyester) is dyed with a mixture of active and dispersed dyes using 0.01% by weight of the dye composition of the biological product, which is a product of the cultivation of the bacterial strain Bacillus stearothermophilus NRRL B-18394 in the form of a fresh filtrate of the culture fluid with an indicator activity of heat-resistant endoalginate lyase at 80 ^o With 430 units / ml

The composition of the impregnating solution, g / l:
Procyon Dye Blue H5RS - 10
Disperse dye blue plastic - 10
Sodium bicarbonate - 10
Urea - 100
Neonol wetting agent AF 9-10 - 1
Manutex RS - 1
Biological product - 0.1
Water - Up to 1000
The fabric, pressed to a weight gain of 80%, is dried with hot air for 3 minutes at 100 ^° C and 4 minutes at 120 ^° C and subjected to fixation treatment with superheated steam at 160 ^° C for 8 minutes. The washing is carried out with cold and hot (70 ^o C) water, a solution of CMC "Talka" 2 g / l (100 ^o C), hot (80 ^o C) and warm (40 ^o C) water. The total duration of the process τ _total = 0.6 hours.

 Get a fabric with a uniform, bright and intense color K / S = 7.41; the degree of fixation of the active dye - 85.1%, dispersed - 91.0%. Color fastness to dry and wet friction is 5 points, to wet wiping 4-5, to soap solutions 5/5/5 and sweat 4-5 / 5/5.

 Example 5

Cotton fabric prepared for dyeing and printing twill art. From 19 YuD, from the Rodniki-Textile assortment, they are colorized with vat dyes according to the rolling-potash method using the thermamyl amylase of the Termamyl preparation (Denmark, F. Novo-Nordisk) in the amount of 0.05% by weight of the coloring composition as a biological product. The composition of the coloring composition, g / kg:
Cube bright orange KHP (15%) - 150
Glycerin - 80
K ₂ CO ₃ (50%) - 200
Rongalit with a thickener (2: 3) - 250
Biological product - 0.5
Solvitous Thickener - Up to 1000
After drying at 80 ^{° C.} for 10 minutes, the fabric is treated in a reducing mat in a medium of saturated water vapor at 103 ... 105 ^{° C.} for 6.. . 8 minutes Washing includes treatment with cold running water, a solution of 30% hydrogen peroxide (2 ... 3 g / l) and acetic acid (2 ml / l) at 40 ... 50 ^o C, warm water, CMC solution "Talca" (3 g / l) and sodium carbonate (2 g / l) at 98 ... 100 ^o С, hot (75 ^o С) and warm (40 ^o С) water. The total duration of the process τ _total = 0.6 hours.

 Get a fabric with clear contours and intense coloring of the stained areas and an unpolluted white background. The degree of fixation of the dye is 93.4%; an indicator of color intensity K / S = 5.12; the degree of whiteness of unpainted areas B = 80.2%. The color fastness to dry friction is 5 points, to wet friction 5, to wet wiping 5, to soap solutions 5/5/5 and sweat 4-5 / 5/5.

 For comparison, the tissue was colorized under identical conditions, but with the introduction of 0.5 g / kg of the enzymatic filtrate of the bacterial strain Bacillus licheniformis VKPM B-2986 into the dye compositions [US Pat. RF 2001103, MKI5 C 12 N 9/26, 1/20; publ. 11.91.91], which is a thermoactive biological product with the ability to break down starch polysaccharides, but containing exodus enzymes. The results presented in the table indicate a comprehensive decrease in controlled quality indicators.

 Analyzing the totality of the experimental data presented in the table, it can be stated that the implementation of the proposed method for coloring cellulose-containing fabrics in compliance with all the distinguishing features allows us to achieve the goal, namely, to reduce the duration of the coloring process by 40 ... 60 times, to ensure the production of a wide range of textile products to improve the quality of the resulting color due to an increase in the degree of fixation of dyes by 4 ... 22%, an indicator of the Ski 5 ... 16%, and color fastness to physico-chemical attack by 0.5. ..2 points, as well as to prevent the possible shading of the white background of printed drawings, accompanied by a decrease in whiteness by 10 ... 20%.

Claims (1)

A method for coloring cellulose-containing fabrics by applying a dye-containing composition containing a dye to the fabric, at least one substance for regulating the distribution of the dye in the fabric structure, at least one substance for securing the dye, and a biological product for cleaving polysaccharides, fixation of the fabric and washing, characterized the fact that as a biological product use a thermoactive enzyme of endoactivity selected from the group comprising endo-1,4-α-D-glucan glucanhydrolase, endo-1,4-β-glucanase and ndoalginate lyase, in an amount of 0.01-0.1% by weight of the dye composition, the fabric coated with the dye composition is dried at 80-120 ^o C, and the fixation is carried out at a temperature of 100-160 ^o C.

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