Method of fermentation and peroxide bleaching of flax-containing fabrics

FIELD: textile, cotton.

SUBSTANCE: invention refers to the textile industry in particular, to the technology of the bleaching of flax-containing fabrics and can be used for the production of the bleached woven linens or for the preparation of the fabrics for colouring and stamping. It describes the method of the fermentation and peroxide bleaching of the flax-containing fabrics including enzymatic procession by the soaking into the 40-45°C solution of the multienzyme preparation with the indicator the enzyme activity, in un/ml: endopolygalacturonase - 7-10; α-amylase - 8.8-9.2; β- amylase - 0.5-0.6; γ- amylase - 0.2-0.5; pectinesterase - 1.0-1.5; exopolygalacturonase - 0.5-0.7; exogalactosidase - 0.3-0.4; exoxylosidase - 0.2-0.3; exoglucanase - 0.3-0.5, with the addition of the sodium bicarbonate 20-25 g/l and penetrating agent, maturing the wet squeezed fabric and its steaming in 85-95°C temperature during 20-30 min.; intermediate washing with the acidification in oxalic acid solution 2.5-5 g/l, high-temperature peroxide bleaching by the stabilised alkaline-peroxide solution with the peroxide concentration 2.2-2.9 g/l with active oxygen for one stage, washing and drying.

EFFECT: invention helps to increase the level of the removal of starch size before peroxide bleaching up to 80-85%; it increases the speed of the capillary soaking of water solution and improves uniformity of the capillary characteristics of the fabric; it increases the strength properties of the fabric, decreases its rigidity to 96-125 mN·cm2 because of larger removal of the lignin; it decreases the attenuationof the dyeing of colour warpings of the tapestry linens; it simplifies the process and reduce its duration.

2 cl, 1 tbl, 3 ex

 

Introduction

The invention relates to the textile industry, namely to the technology of bleaching flax-containing tissues, and can be used to produce bleached woven or for the preparation of fabrics before dyeing and printing.

The level of technology

Processing libovolneho raw materials in the textile industry provides for the phased removal of the impurities comprehensive flax fiber, starting with the preparation Rove in spinning, to achieve the necessary degree of fragmentation of bast bundles and increasing fineness (numbers) of the resulting yarn. Further extraction recellular components is carried out when finishing woven to achieve the required level of capillarity and white. When the remaining number of natural satellites cellulose are added to the admixture of starch dressings that reduce breakage of the yarn at the looms, but then turns into a technological pollution, be required to complete deletion.

Known processes of bleaching linen fabrics are characterized by multi-stage and significantly longer in duration than the preparation of cotton fabrics. This is because linen fabric, derived from half-white yarn, contains more recellular connection is s, especially lignin than harsh cotton yarn.

There is a method of continuous processing of linen cloth harness to full white on the five-section line LIO-1-L [Friedland GI Finish linen fabrics / M: Light and food. prom the terrain, 1982. - S-188], which includes the following set of operations:

1 - hypochlorite bleaching:

- impregnation with a solution of calcium hypochlorite or sodium hypochlorite;

- maturing without mortar;

- rinsing with cold water;

2 - peroxide bleaching:

- impregnation of alkali-silicate peroxide solution;

- steaming;

- flushing hot and cold water;

3 - hypochlorite bleaching:

- impregnation with a solution of hypochlorite;

- maturing without mortar;

- rinsing with cold water;

4 - peroxide bleaching:

- impregnation of alkali-silicate peroxide solution;

treatment in alkali-silicate-personam solution;

- flushing hot and cold water;

5 - acidification:

- impregnation with a solution of sulfuric acid,

- maturing in the apparatus without mortar;

- flushing;

- neutralization of a solution of soda ash;

- rinsing with cold water.

This method is complicated, time-consuming, requires large expenditures of chemicals and heat. Holding two handles hypochlorite increases the risk of unwanted degradation of the cellulite, tighten the SHL, and also leads to high concentrations of chlorine dioxide in the effluent, thereby violating the processes of biological treatment. The method is not applicable to the bleaching of linen fabrics with colored proselkami because it causes a significant clarification of the dyed yarns, and also for processing of semi-linen fabrics, containing the basis of cotton yarn, the strength of which decreases sharply.

There is a method of bleaching linen fabrics and fabrics of dyed yarn [Friedland GI Finish linen fabrics / M: Light and food. prom the terrain, 1982.- P.185-188]. Unlike the previous, this method provides for the replacement of the first stage hypochlorite treatment on conducting rasshifrovka fabric by impregnation with a solution of oxalic acid 2-2,5 g/l of wetting agent 0.25-0.3 g/L. Further sequence of operations is the same as in the above method, the temperature of treatment with the peroxide bleaching reduced to 70-75°C.

However, the number of stages and the total duration of processing of the fabric is not changed. In addition, insufficient level achieved performance capillary tissue, the degree of removal of starch, great damage to the pulp flax in the long-term effects of hypochlorite and sulphuric acid.

There is a method of blanching semi-linen fabrics for shortened technologies consistent with carrying out the stages of RA is Litovka organic acid, oxidative pulping, bleaching with sodium hypochlorite and peroxide bleaching [Ivlev A.G. improving the technology of bleaching linen fabrics / proc. Dokl. scientific-technical conference "Chemistry-96", Ivanovo, 1996. - S].

Despite the exclusion of flushing between hypochlorite and peroxide bleaching and reducing the concentration of available chlorine in hypochlorite solutions, this method does not completely abandon the use of chlorine bleach.

There is a method of blanching semi-linen fabrics without the use of chlorine-containing oxidants [Bilyaletdinov RD, Rakitin VM Technology bleaching flax-containing fabrics / INF. the message of CNIEL. The textile industry, 1987, No. 11. - P.10-11]. The method includes rasshifrovka, degumming alkaline solution, acidification, peroxide bleaching, acidification and neutralization.

Providing acceptable quality blanching of the semi-linen fabrics with a cotton base and linen weft while reducing the consumption of oxidants, this method lacks versatility as unsuitable for blanching awarded pure fabrics. In addition, an alkaline otwarte significantly reduces the strength of the flax component of the tissue.

Closest to the claimed invention, the essence and the achieved technical result is a method of multi-stage peroxide bele the Oia fabrics of flax-containing [RU 2208078, publ. 10.07.2003]. The exception is the use of hypochlorite in this way it became possible thanks to the application under rasshifrovka multienzyme composition manufactured by Novozymes (Denmark) drugs Aquasim 240L and Wiscosin L in the presence of oxalic acid, regulating acid-base properties. The drug Aquasim contains starch-destroying enzyme **-amylase, a standard indicator of its activity is 240 units/g of protein. Drug Viscosum L contains the following enzymes:

- pectinase (also known andprecautions, classification code of the enzyme EC 3.2.1.1), a standard measure of activity 3000 units/g;

- two types of endoglucanases, splitting glucoside communication in the macromolecules of cellulose and branched β-glucan hemicellulosic connections:

- endo-1,4-β-glucanase(or cellulase EC 3.2.1.4),

- endo-1,3(4)-β-glucanase (EC 3.2.1.6);

standard rate total endoglucanase activity of 100 units/year in Addition, Wiscosin L contains trace quantities hemicellulase enzymes endogenous steps: endoglucanase, endoxylanase, arabinose etc. the Method includes the following stages:

1 - enzyme treatment (desizing). Stage includes:

the impregnated fabric at 50-60°C With a solution containing, g/l:

0,5-0,8
the wetting neonol AF 9/100,25
enzyme preparations Aquasim 240L0,5-0,8
Viscosum L0,2-0,5,

that provides a level of activity of enzymes in solution, units/l:

α-amylase120-190
andprecautions600-1500
endoglucanase (total)20-50;

- maturing in the cold 30-45 min;

- rinse with water at 65-70°C.

2 - high temperature peroxide bleaching. Stage includes:

the impregnated fabric at 50-60°C whitening solution containing, g/l:

sulfate magnesiumof 0.15-0.2
sodium tripolyphosphateof 0.25-0.3
silicate or metasilicate sodium2,3-2,5
hydrogen peroxide (in terms of active oxygen)1,8-2,0,

- steaming at 85-90°C for 60-90 min;

- rinse with water at 65-70°C.

3 - peroxide low temperature bleaching. Stage includes:

the impregnated fabric at 18-23°C whitening solution containing the same reagents as in stage 2;

- maturing at 18-23°C for 60-90 min;

- rinse with water at 65-70°C.

4 - high temperature peroxide bleaching under the same conditions as in stage 2;

5 - acidification by impregnation with a solution of oxalic acid, and 0.5-0.8 g/l at 50-60°C, holding for 15-20 min and a final rinse with cold water;

6 - drying.

The method allows for bleaching as awarded pure and semi-linen fabrics, to obtain products with whiteness index level 83,5-84,2% and capillarity 124-137 mm/hour.

However, this method due to the three-stage peroxide bleaching is a complex, long - up to 6 hours awarded pure tissues and has the following significant disadvantages:

- low degree of starch removal of the dressing prior to peroxide bleaching, not exceeding 57-61%, which complicates the impregnated fabric whitening solution and requires a threefold holding peroxide bleaching;

low speed and uniformity of capillary absorption of an aqueous solution of bleached fabrics. Thus, the lifting height of the liquid for 30 minutes, i.e. the kinetic plot of the sorption process, does not exceed 75 mm, peak-to-peak variation of the height of the mountain is mA liquid on the strip of cloth for 60 minutes is 14-18 mm. This is due to incomplete breakdown of pectic substances in the structure of the integrated flax - residual pectin content between 0.30 to 0.38 wt.%;

- low strength characteristics of the tissue due to the destructive impact of endoglucanases on cellulose. Thus, lowering of the breaking load is 9.8%, breaking elongation does not exceed 12-14 mm;

- high rigidity tissue - 150 mn·cm2due to the large residual undigested lignin - 1.97 wt.% against 2,86 wt.% in severe tissue;

a significant weakening of dyeing yarns in fabrics with colored proselkami. Thus, the increase of the luminosity reaches 8-12%, so the method cannot be used for blanching multicolored canvases, and therefore non-universal.

Thus, unknown simple, less time consuming method of enzyme-peroxide bleaching of flax-containing tissues, applicable for the entire range of bleach paintings, providing a more efficient cleavage recellular impurities and allowing along with achieving high performance white to improve capillary, the strength and deformation properties of products.

The invention

Inventive task was to find a more simple method of enzyme-peroxide bleaching of flax-containing tissues, including enzymatic processing solution Poliform nnogo drug containing α-amylase, andprecautions, hemicellulase enzymes, wetting and regulator of acid-base properties, maturing macroalgae fabric, an intermediate washing, high temperature peroxide bleaching stable alkaline-peroxide solution, leaching and acidification with a solution of oxalic acid and drying, along with achieving high performance white would provide a more complete removal of starch dressing, would increase the capillary, the strength and deformation properties of bleached tissue due to more complete removal of pectin and lignin, while reducing the number of stages of peroxide bleaching and the total duration of the process.

The problem is solved by the fact that in the method of enzyme-peroxide bleaching of flax-containing tissues, including enzymatic treatment by impregnation with a solution of multienzyme preparation, including andprecautions, α-amylase, hemicellulase enzymes, wetting and regulator of acid-base properties, and aging macroalgae fabric, an intermediate washing, high temperature peroxide bleaching stable alkaline-peroxide solution, leaching, acidification of the organic acid and drying, after enzymatic processing carried out steaming fabric at 85-95°C for 20-30 min, heat the peroxide bleaching is carried out in one stage, when the concentration of hydrogen peroxide 2,2-2,9 g/l (in terms of active oxygen), acidification with a solution of oxalic acid is conducted simultaneously with intermediate rinsing when the concentration of oxalic acid 2.5 to 5 g/l, and multienzyme preparation additionally contains β - and γ-amylase, pectinesterase, ectoparasitosis and as hemicellulase enzymes contains ectoparasitoids, associatedthe and ekzoplanetu, using multienzyme preparation in an amount to provide the following values of the enzyme activity, units/ml:

andprecautions7-10;
α-amylaseof 8.8 to 9.2
β-amylase0,5-0,6
γ-amylase0,2-0,5
pectinesterase1,0-1,5
ectoparasitosis0,5-0,7
ectoparasitoids0,3-0,4
associatedtheof 0.2-0.3
ekzoplaneta0.3 to 0.5,

as a regulator of acid-base properties use bicarbon is tons of sodium in the amount of 20-25 g/l, and the impregnation solution multienzyme preparation is carried out at a temperature of 40-45°C.

The invention provides the following advantages along with achieving a high level of whiteness and capillary fabric:

- to increase the degree of removal of starch dressing before peroxide bleaching up to 80-85%;

- increase the speed of capillary absorption of water solution and to improve the uniformity of the capillary properties. Thus, the lifting height of the liquid for 30 minutes is up 82-87 mm against 70-75 mm in the prototype. Peak-to-peak variation of the height of liquid on the strip of cloth for 60 minutes reduced to 4-8 mm against 14-18 mm in the prototype. All this results in more complete removal of pectic substances and reduce their residual content in flax fiber 0.10 to 0.13 wt.%;

to improve the strength characteristics of the tissue, reducing the decrease in the breaking load of the fabric up to 2.5-3.3 percent compared with 8.5 and 9.8% for the prototype and increasing the breaking elongation of up to 15.5-18 mm against 12-14 mm for the prototype;

to reduce the stiffness of the fabric to 96-125 mn·cm2due to more complete removal of lignin and reduce its residual content of up to 1.10-1.15% against 1.97 wt.% when processing the prototype;

- to reduce the weakening of the paint color pronovost multicolored canvases. Thus, the increase rate of the lightness of the dyed yarn is 1.5 to 2.7% vs. 8-12% prototype;

- with whom persons can reduce the duration of the process and simplify it by instead of three stages of peroxide bleaching (two high and one low) bleaching is carried out in one stage duration is 9 times smaller than the total time of peroxide bleaching on the prototype.

Information confirming the possibility of carrying out the invention

The claimed method can be used to treat severe flax woven fabrics of half white yarn, obtained from the prepared rovings, half-linen fabrics, containing half-white linen yarn in the weft and harsh cotton yarn in the base, and also multi-colored fabric, formed by the method of weaving figure of half white and colored linen yarn.

For implementing the method using the following reagents.

As a multienzyme preparation can be used products culturing microbiological producers, providing the biosynthesis of complex technologically necessary enzymes:

- andprecautions (has a different common name pectinase, and installed the current International classification of enzymes 1961 classification number EC 3.2.1.15 and scientific name poly[1,4-α-D-galacturonic]glucanohydrolase);

α-amylase (EC 3.2.1.1, endo-1,4-D-glucan-glucanohydrolase);

- β-amylase (EC 3.2.1.2, Exo-1,4-α-D-glucan-maltogenase);

- γ-amylase (EC 3.2.1.3, Exo-1,a-glucosidase);

- pectinesterase (EC 3. 1.1.11, pectin-pectolyase),

- ectoparasitosis (EC 3.2.1.67 poly[1,4-α-D-galacturonic]galactosialidosis) and/or ectoparasitoids (KF 3.2.1.82 poly[1.4-α-D-galactosidase]dialectological);

- ectoparasitoids (EC 3.2.1.23, β-D-galactose-galactohydrolase);

- associatedthe (EC 3.2.1.37, 1,4-β-D-xylan-kilolitres and/or KF 3.2.1.72, 1,3-β-xylan-kilolitres);

ekzoplaneta (EC 3.2.1.74, Exo-1,4-β-glucosidase).

Multienzyme preparation can be obtained, for example, by mixing the products of the cultivation of non-pathogenic bacterial strains from the Museum Gosniigenetika, registered under the non-Russian collection of industrial microorganisms (VKPM) B. circulans VKPM B-1741 or In-3327; B. subtilis VKPM B-1895 or In-5752; B. lichenoformis PMBC In 1951 or In-3039; Erw. carotovora VKPM B-1358 or In-1121; B. mesentericus VKPM B-1559 or In-2466. You can use composition of the products of the cultivation of mushroom producers of Penicillium lanosum F-387, Asp.awamori 22, Asp. awamori F-166 or Asp. ficuum F-112.

Measuring the amount of enzymes in the conventional gravimetric or volumetric units is difficult because enzymes are proteins, and to determine their quantity in mixtures with other proteins is impossible. In addition, the catalytic properties of enzymes are unstable and may change considerably depending on temperature the x, acid-base properties of the environment or completely lost under adverse conditions of storage and use of drugs. In accordance with the recommendations of the Commission on enzymes of the International Union of biochemistry quantitative assessment of the content of a specific enzyme in the product (solution) expressed in units of activity according to the results of the reaction that it catalyzes, i.e. the number of the resulting reaction product or the reduction of the original substrate. Under the unit of activity of any enzyme refers to this quantity, which catalyzes the transformation of 1 micromole of a certain kind of substance in 1 min under the given regulated the conditions of the test experiment.

The ratio of certain types of enzymes are regulated by selection of the composition of culture media, conditions of cultivation of microorganisms and biosynthesis enzymes, and methods of their subsequent excretion. Multienzyme preparation may be used in powder form after extraction and freeze drying, in the form of a stable liquid products or fresh culture filtrates of liquids. The method can be implemented in any ratio of components multienzyme preparation within the specified ranges of activities.

As wetting solution for enzymatic processing contains orogeny surfactant, for example neonol AF 9-10 (TU 2483-077-05766801-98) or sentenal BV (THE 6-36-5744684-85-90).

- As a regulator of acid-base properties solution for enzymatic processing contains sodium bicarbonate NaHCO3(GOST 2156-76)widely used in the process of coloring textile materials active dyes.

As the oxidizing agent at high temperature the peroxide bleaching using hydrogen peroxide, the dosage is carried taking into account its concentration in commercial discharge forms in terms of active oxygen. To stabilize the peroxide is preferably used Basilicata stabilizers, such as MgSO4or MgCl2derivatives polycarboxylic or reinkarnasi acids.

As the alkaline agent at a high temperature, the peroxide bleaching can be used traditionally used connection - tripolyphosphate and soda ash, the concentration of which is determined to set the values of total alkalinity of a solution in terms of caustic soda.

As agent for acidification tissue using oxalic acid (TU 2431-002-77057039-2006)widely used for these purposes in the textile enterprises.

As additional components solutions for enzymatic processing and peroxide bleaching if necessary, may contain complexing agents, and dispensatio, neutral electrolytes.

- For the preparation of solutions can be used distilled, technical or softened water.

The method can be implemented on standard equipment for a continuous process of refining linen fabrics, in particular on the processing lines harness LEO-1-L, LA-1L-1 or rasprave, for example, on domestic production lines AO-110, LOK-140 or imported equipment "Textima", "Kleinewefers".

The way to implement a consistent implementation of the following operations:

- Enzyme treatment solution multienzyme preparation with indicators of enzyme activity, units/ml:

andprecautions7-10
α-amylaseof 8.8 to 9.2
β-amylase0,5-0,6
γ-amylase0,2-0,5
pectinesterase1,0-1,5
ectoparasitosis0,5-0,7
ectoparasitoids0,3-0,4
associatedtheof 0.2-0.3
ekzoplaneta0.3 to 0.5.

The solution also contains a wetting agent 0.25-0.5 g/l and sodium bicarbonate 20-25 g/l

The treatment is carried out by impregnation of the fabric with the solution temperature 40-45°C and aging macroalgae paintings for 30-40 min with subsequent steaming of the fabric at 85-95°C for 20-30 minutes

- Intermediate rinse fabric hot (65-70°C) and cold (25-30°C) water is carried out simultaneously with acidification by introducing into one of the wash bath of oxalic acid in a concentration of 2.5-5 g/L.

- Peroxide bleaching is carried out in one stage at a high temperature by impregnation of the fabric stable alkaline-peroxide solution at 50-60°C and steaming at 85-95°C for 20-30 minutes Whitening solution contains hydrogen peroxide at a concentration of 2.2-2.9 g/l in terms of active oxygen, a peroxide stabilizer (for example, MgSO4or MgCl2derivatives polycarboxylic or reinkarnasi acids), alkali agents (e.g., tripolyphosphate, soda ash) to the total alkalinity of 2.0-2.1 g/l in terms of caustic soda. If necessary, the solution may include wetting, complexing agents, neutral electrolytes.

- Washing fabric hot (65-70°C) and cold (25-30°C) water.

- Drying contact heating.

Evaluation of the effectiveness of the proposed pic is BA enzymatic-peroxide bleaching of flax-containing tissues and the prototype method performed equally on indicators of chemical, physico-mechanical and optical properties of tissues and analyzed using accepted methods:

1 - white fabric (B, %) (GOST 18054-72);

2 - the degree of removal of starch dressing (δk means, %) was estimated by the standard technique of translation of polysaccharide to glucose and determine its concentration by titration with sodium thiosulfate solution [Gardens FI Laboratory course in chemical technology of fibrous materials. - M.: Gisleham, 1963.- P.23-26];

3 - residual content of pectin substances in flax fibre (Post wt.%) [Krichevsky G., Nikitov V.A. theory and practice of preparation of textile materials of cellulose fibers. - M.: 1989. - 207 S.];

4 - residual lignin content in flax fiber (LOST, wt.%) [Krichevsky G., Nikitov V.A. theory and practice of preparation of textile materials of cellulose fibers. - M.: 1989.- 207 S.];

5 - capillarity tissue (GOST 3816-81):

- lifting height of the liquid for 30 minutes (N30mm);

- lifting height of the liquid for 60 min (N60mm);

the range of variation of the height of the liquid for 60 min (ΔN60= Hmax- Hminmm);

6 - breaking characteristics (GOST 2813-72):

- the breaking load of the fabric strips (PaboutN);

- reduction of the breaking load of the fabric (Δabout, %);

- breaking elongation (lPmm);

7 - tissue stiffness (EI, mn·cm2 ) was measured cantilever method on the instrument PT-2 (GOST 10550-93);

8 - lightness color color pronovost (L, %) - an increase of lightness corresponds to a decrease in the intensity of the color. For evaluation used sitosterolemia complex "Colorist" software "Colorist", version 3.3.1997.

The invention is illustrated by the following examples.

Example 1.

Bleaching linen cloth with colored proselkami art. 4224 carried out in the following mode:

1 - enzyme treatment solution containing:

- multienzyme preparation obtained by mixing the products of cultivation of bacterial strains of B. circulans VKPM B-1741, rw. artovora VKPM B-1358, B. mesentericus VKPM B-1559, B. subtilis In 1895 and Century lichenoformis VKPM B-1951, with indicators of enzyme activity, units/ml:

andprecautions10
α-amylase9,2
β-amylase0,6
γ-amylase0,5
pectinesterase1,5
ectoparasitosis0,7
ectoparasitoids 0,4
associatedthe0,3
ekzoplaneta0,5
sodium bicarbonate25 g/l
neonol AF 9/100.25 g/l;

with the addition of complexone Trilon B 1 g/L. the Treatment is carried out by impregnation of the fabric with the solution temperature of 40°C and aging macroalgae cloth for 30 min, followed by steaming the fabric at 85-90°C for 30 min;

2 - intermediate leaching and acidification fabric hot (65-70°C) water with the addition of oxalic acid at a concentration of 3.5 g/l and cold (25-30°C) water;

3 - high temperature peroxide bleaching is carried out by impregnation of the fabric stable alkaline-peroxide solution at 60°C and steaming at 85-90°C for 40 minutes Impregnating solution contains, g/l:

hydrogen peroxide (in terms of active oxygen)2,5
sulfate magnesium0,2
tripolyphosphate0,3
the soda ash to the total alkalinity
(in terms of caustic soda)2,0
comprehensive Trilon B1,0

4 - rinse fabric hot (65-70°C) and cold (25-30°C) water;

5 - contact drying by heating at 100°C.

For comparison processing petrothene conducted on the prototype following the sequence of stages and conditions of their implementation.

The test results bleached fabrics for the whole set of monitorable indicators presented in the table.

Example 2.

The bleaching was subjected to a linen cloth of half white yarn art. 8C-62. Processing was carried out according to the following mode:

1 - enzyme treatment solution containing:

- multienzyme preparation obtained by mixing the products of cultivation of bacterial strains of B. circulans VKPM B-3327, Erw. corotovora VKPM B-1121, B. mesentericus VKPM B-1559, B. subtilis In-5752; B. lichenoformis VKPM B-3039, with indicators of enzyme activity, units/ml:

andprecautions10
α-amylase9,2
β-amylase0,6
γ-amylase0,4
p is ctenostomata 1,2
ectoparasitosis0,7
ectoparasitoids0,4
associatedthe0,3
ekzoplaneta0,5
sodium bicarbonate25 g/l
sintana BV0.5 g/l;

with the addition of complexone Trilon B 1 g/L. the Treatment is carried out by impregnation of the fabric with the solution temperature of 45°C and aging macroalgae paintings for 40 min, followed by steaming the fabric at 90-95°C for 30 min;

2 - intermediate leaching and acidification fabric hot (65-70°C) and cold water (25-30°C) water with the addition of oxalic acid at a concentration of 5 g/l;

3 - high temperature peroxide bleaching is carried out by impregnation of the fabric stable alkaline-peroxide solution at 60°C and steaming at 85-90°C for 40 minutes Impregnating solution contains, g/l:

hydrogen peroxide (in terms of active oxygen)2,9
sulfate magnesium 0,2
tripolyphosphate0,3
the soda ash to the total alkalinity
(in terms of caustic soda)2,1
comprehensive Trilon B1,5;

4 - rinse fabric hot (65-70°C) and cold (25-30°C) water;

5 - contact drying by heating at 100°C.

The test results bleached fabrics on set of monitorable indicators 1-7 (without evaluation metric lightness (L) is presented in the table.

Example 3.

The bleaching was subjected to semi-linen fabric art. 05257 of linen yarn in the weft and lichtovannaya cotton yarn in the warp. Processing was carried out according to the following mode:

1 - enzyme treatment solution containing:

- multienzyme preparation obtained by mixing the products of cultivation, microscopic fungi Penicillium lanosum lanosum F-387, Asp.awamori 22, As. awamori F-166 or As. ficuum F-112, with indicators of enzyme activity, units/ml:

andprecautions7,0
α-amylase8,8
β-amylase
γ-amylase0,2
pectinesterase1,0
ectoparasitosis0,5
ectoparasitoids0,3
associatedthe0,2
ekzoplaneta0,3
sodium bicarbonate20 g/l
sintana BV0.25 g/l

The treatment is carried out by impregnation of the fabric with the solution temperature of 45°C and aging macroalgae paintings for 35 min, followed by steaming the fabric at 90-95°C for 20 min;

2 - intermediate leaching and acidification fabric hot (65-70°C) and cold water (25-30°C) water with the addition of oxalic acid at a concentration of 2.5 g/l;

3 - high temperature peroxide bleaching is carried out by impregnation of the fabric stable alkaline-peroxide solution at 50°C and steaming at 85-90°C for 40 minutes Impregnating solution contains, g/l:

hydrogen peroxide (in terms of active oxygen) 2,2
sulfate magnesium0,15
tripolyphosphate0,3
the soda ash to the total alkalinity
(in terms of caustic soda)2,0
comprehensive Trilon B0,5;

4 - rinse fabric hot (65-70°C) and cold (25-30°C) water;

5 - contact drying by heating at 100°C.

The test results bleached fabrics on set of monitorable indicators 1-7 (without evaluation metric lightness (L) is presented in the table.

These tables show that the claimed method is applicable to the bleaching of different types of flax-containing tissue - awarded pure, multi-colored and semi-linen. Despite the decrease in the number of stages of peroxide bleaching and a threefold reduction in the total duration of the process, the method provides a high rate of white fabric on the level 83,5-84,0%, as well as receive important complex technical result, which is expressed in a simultaneous increase of the capillary, the strength and deformation properties of bleached fabrics:

1. The degree of removal of starch dressing (δk means) before peroxide bleaching increases the 1.5 times, that ensures the effective destruction of the natural impurities of flax fiber at one stage holding peroxide bleaching.

2. The residual content of pectic substances (Post), which is the adhesive on the basis of connective tissue in the structure of flax fibre, reduced 3.5 times, which significantly improves the speed and uniformity of capillary absorption of aqueous solutions bleached fabrics: lifting height of liquid on the strip of cloth for 30 minutes (N30) increased by 1.17 times, peak-to-peak variation of the height of the liquid for 60 min (ΔN60declining 2.6 times.

3. Improved strength properties of bleached tissue: reduced breaking load (Δabout) decreased 3.3 times with increasing rupture elongation 1.4 times.

4. By improving the completeness of the removal of lignin and reduce its residual content (LOSTin 1,71 times reduces the stiffness of tissue (G) 1.35 times.

5. Decreases the weakening of the paint color pronovost multicolored canvases - increasing lightness dyed yarn decreased 4.4-5.3 times.

Along with this important positive effect is to simplify the method, reducing the number of stages and the overall reduction in the duration of the process 4 times.

The method of enzyme-peroxide bleaching losteria the x tissues, including enzymatic treatment by impregnation with a solution of multienzyme preparation, including andprecautions, α-amylase, hemicellulase enzymes, wetting and regulator of acid-base properties, and aging macroalgae fabric, an intermediate washing, high temperature peroxide bleaching stable alkaline-peroxide solution, leaching, acidification with a solution of oxalic acid and drying, characterized in that after enzymatic processing carried out steaming fabric at 85-95°C for 20-30 min, high temperature peroxide bleaching is carried out in one stage, when the concentration of hydrogen peroxide of 2.2-2.9 g/l (in terms of active oxygen), acidification with a solution of oxalic acid is conducted simultaneously with intermediate rinsing when the concentration of oxalic acid 2.5 to 5 g/l, and multienzyme preparation additionally contains β - and α-amylase, pectinesterase, ectoparasitosis and as hemicellulase enzymes contains ectoparasitoids, associatedthe and ekzoplanetu, using multienzyme preparation in an amount to provide the following values of the enzyme activity, units/ml:

andprecautions7-10
of 8.8 to 9.2
β-amylase0,5-0,6
γ-amylase0,2-0,5
pectinesterase1,0-1,5
ectoparasitosis0,5-0,7
ectoparasitoids0,3-0,4
associatedtheof 0.2-0.3
ekzoplaneta0.3 to 0.5,

as a regulator of acid-base properties use sodium bicarbonate in the amount of 20-25 g/l, and the impregnation solution multienzyme preparation is carried out at a temperature of 40-45°C.



 

Same patents:

The invention relates to the textile industry, in particular to a method of bleaching fabrics

The invention relates to chemical technology of textile finishing production, namely the technology of bleaching cellulose-containing textile materials

FIELD: textile, paper.

SUBSTANCE: invention concerns method of flaxen roving preparation for spinning and can be applied in textile industry. Method of enzyme and peroxide preparation of highly lignified flaxen roving for spinning involves deacidification, enzyme processing at 40-50°C for 90-95 minutes by polyenzyme preparation solution with enzyme activity indicators, units per ml: endopolygalacturonase - 20-25; pectinesterase - 2.5-4.7; protease - 0.2-0.3; exopolygalacturonase - 0.6-0.1; exogalactosidase - 0.2-0.4; exoxylosidase - 0.3-0.5; and exoglucanase - 0.6-0.8. Further the roving is heated to the boiling point and matured for 20-25 minutes, flushed by water and processed for 90-95 minutes in alkaline peroxide solution at hydro peroxide concentration of 0.6-0.8 g/l of active oxygen and total alkalinity of 6.5-7.0 g/l rated per caustic soda. Then the roving is flushed with detergent and water and undergoes counter-microbe processing.

EFFECT: fiber whitening degree enhanced up to 54-56%; obtainment of thin yarn meeting the requirements for both "1 high-flaxen" and "1 high tow" grades by GOST 10078-85 in line density and line density and tear load variation rates; reduced yarn tear rate in weaving process to 40-50 tears for 100 spindles per hour; enhanced yarn strength in 1,2-1,4 times; improved esthetics of woven canvas exterior.

1 tbl, 3 ex

FIELD: textile, paper.

SUBSTANCE: invention concerns method of flaxen roving preparation for spinning and can be applied in textile industry. Method of enzyme and peroxide preparation of flaxen roving for spinning involves deacidification performed before enzyme processing for 90-95 minutes by polyenzyme preparation solution with enzyme activity indicators, units per ml: endopolygalacturonase - 20-25; pectinesterase - 0.8-4.7; protease - 0.2-0.3; and exopolygalacturonase - 0.2-0.4. Further the roving is flushed by water and processed for 90-95 minutes in alkaline peroxide solution at hydro peroxide concentration of 0.4-0.5 g/l of active oxygen and total alkalinity of 6.5-7.0 g/l rated per caustic soda, then flushed with detergent and water and undergoes counter-microbe processing.

EFFECT: reduced tear load in moist unprocessed roving up to 50-61%; obtainment of thin yarn meeting the requirements for 1 grade in thickness and stability of physical and chemical yarn properties; enhanced yarn strength in 1,2-1,4 times; improved esthetics of woven canvas exterior.

1 tbl, 3 ex

FIELD: textile, paper.

SUBSTANCE: invention concerns methods of flax fiber dyeing and preparation for spinning and can be applied in textile industry. Combined method of dyeing and preparation for spinning involves deacidification, processing by digester dye solution for 90-95 minutes at 40-50°C, the solution including vat colour, sodium bicarbonate, sulfonol NP-3 and anhydrous synthanol, polyenzyme preparation with enzyme activity indicators, units per ml of solution: endopolygalacturonase - 20-40; pectinesterase - 2.5 - 8.0; protease - 0.2-0.4; exopolygalacturonase - 0.6-1.5; exogalactosidase - 0.3-0.5; exoxylosidase - 0.3-0.8; exoglucanase - 0.4-1.0. Further the mass is heated to the boiling point, matured for 30-60 minutes, flushed by cold water. Oxidising processing is performed for 15-25 minutes at 20-25°C in stabilised peroxide solution including 0.3-0.4 g/l of hydro peroxide (100%), 1-2 g/l of laundry soap, and alkaline agents to comprise total alkalinity of 5.5-6.0 g/l rated per caustic soda, with further heating for 20-50 minutes to 95-100°C and maturing for 20-30 minutes, followed by double flush with detergent first and with water next, and further deacidification at 45-50°C for 15-20 minutes and flushing.

EFFECT: reduced irregularity of geometrical parametres and durability of flax semiproducts; improved colorability and colour evenness of textile semiproducts; more environment-friendly process and improved labour health.

1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to bleaching compositions, which in fact do not contain peroxide bleaches, for bleaching of fabrics. Described is liquid bleaching composition with pH 10 or lower, which contains: (a) complex compound of transitional metal as catalyst of bleaching in air, (b) from 0.001 for 3 wt/wt % of odorant.

EFFECT: obtaining composition, whose bleaching activity is more, than 10 times higher as compared with bleaching activity of composition, containing as odorant molar equivalent of citronellal.

5 cl, 3 tbl, 62 ex

FIELD: chemistry.

SUBSTANCE: particles contain inner coating layer that consist of at least one hydrate-forming mineral salt, and outer coating layer, including 0.2-3 wt % alkali metal silicate with module more than 2.5, particularly 3 to 5. Outer layer is obtained using alkali metal silicate solution with alkali metal silicate concentration 2 to 20 wt %. Dissolution time can be extended by alkali metal silicate concentration lowering in solution used, coating material amount being the same. Dissolution time can be extended significantly according to coating layers sequence and solution concentration with low quantity of alkali metal silicate.

EFFECT: extension of dissolution time.

18 cl, 7 tbl, 18 ex

FIELD: process for treatment of textile materials, in particular, whitening of flax fiber for producing of hygroscopic wool used for medicine purposes.

SUBSTANCE: method involves subjecting flax fiber to oxidizing cooking followed by whitening with the use of hydrogen peroxide in the presence of stabilizing preparation based on oxyethylidene diphosphonic acid; after final rinsing, providing brightening processing, preferably with the use of solution containing higher fatty acid based softener used in an amount of 0.5-1.0 g/l. Method is realized in industrial plants with the use of proper equipment and chemical substances available and produced on industrial scale by home enterprises. Said method does not require substantial alterations in chemical processes.

EFFECT: increased whitening extent, capillarity and moisture absorbing capacity of wool produced.

2 tbl, 5 ex

FIELD: light industry, in particular, raw material dyeing processes used, for example, in whitening of mink skin fur hair.

SUBSTANCE: method involves providing additional tinning of skin with aqueous composition containing sodium chloride, composition based on low-molecular alcohol polyacetals, mixture of non-ionogen surfactants and cyclic terpenes; whitening for 2.0-4.5 hours with the use of aqueous composition containing sodium chloride, potassium persulfate, composition based on mineral and organic acids as pH stabilizers, mixture of primary fatty alcohols as protective admixture and 30%-hydrogen peroxide; providing reduction with the use of aqueous composition comprising sodium chloride, oxalic acid and mixture of non-ionogen surfactants with cyclic terpenes.

EFFECT: improved consumer properties of fur skins.

2 tbl

FIELD: light and fur industry.

SUBSTANCE: invention relates to a composition used for whitening hair cover of fur hides. The composition comprises sodium chloride, hydrogen peroxide, potassium persulfate, the composition based on mineral and organic acid salts - "Antikolor 1" or "Antikolor-2" as an agent for stabilizing pH value, and a mixture of primary saturated alcohols - "Antikolor-3" as a protective additive. The composition provides reducing the negative effect of leather and hair cover of hide. The composition can be used in raw-dye manufacture in treatment of hides with pigmented hair cover, for example, hides of karakul group.

EFFECT: valuable properties of composition.

2 tbl

FIELD: textile industry.

SUBSTANCE: composition contains hydrogen peroxide, aqueous ammonia, silicate-containing hydrogen peroxide stabilizer, nonionic or anionic surfactant, and water, said stabilizer being, in particular, taken separately or in various proportions to each other substances selected from group including kaolin, talc, bentonite, zeolite sorbent, and diatomite.

EFFECT: reduced loss in strength, felting tendency, and rigidity of textiles.

2 tbl, 6 ex

The invention relates to the treatment of textiles by washing or bleaching

FIELD: textile, paper.

SUBSTANCE: invention concerns method of flaxen roving preparation for spinning and can be applied in textile industry. Method of enzyme and peroxide preparation of highly lignified flaxen roving for spinning involves deacidification, enzyme processing at 40-50°C for 90-95 minutes by polyenzyme preparation solution with enzyme activity indicators, units per ml: endopolygalacturonase - 20-25; pectinesterase - 2.5-4.7; protease - 0.2-0.3; exopolygalacturonase - 0.6-0.1; exogalactosidase - 0.2-0.4; exoxylosidase - 0.3-0.5; and exoglucanase - 0.6-0.8. Further the roving is heated to the boiling point and matured for 20-25 minutes, flushed by water and processed for 90-95 minutes in alkaline peroxide solution at hydro peroxide concentration of 0.6-0.8 g/l of active oxygen and total alkalinity of 6.5-7.0 g/l rated per caustic soda. Then the roving is flushed with detergent and water and undergoes counter-microbe processing.

EFFECT: fiber whitening degree enhanced up to 54-56%; obtainment of thin yarn meeting the requirements for both "1 high-flaxen" and "1 high tow" grades by GOST 10078-85 in line density and line density and tear load variation rates; reduced yarn tear rate in weaving process to 40-50 tears for 100 spindles per hour; enhanced yarn strength in 1,2-1,4 times; improved esthetics of woven canvas exterior.

1 tbl, 3 ex

FIELD: textile, paper.

SUBSTANCE: invention concerns method of flaxen roving preparation for spinning and can be applied in textile industry. Method of enzyme and peroxide preparation of flaxen roving for spinning involves deacidification performed before enzyme processing for 90-95 minutes by polyenzyme preparation solution with enzyme activity indicators, units per ml: endopolygalacturonase - 20-25; pectinesterase - 0.8-4.7; protease - 0.2-0.3; and exopolygalacturonase - 0.2-0.4. Further the roving is flushed by water and processed for 90-95 minutes in alkaline peroxide solution at hydro peroxide concentration of 0.4-0.5 g/l of active oxygen and total alkalinity of 6.5-7.0 g/l rated per caustic soda, then flushed with detergent and water and undergoes counter-microbe processing.

EFFECT: reduced tear load in moist unprocessed roving up to 50-61%; obtainment of thin yarn meeting the requirements for 1 grade in thickness and stability of physical and chemical yarn properties; enhanced yarn strength in 1,2-1,4 times; improved esthetics of woven canvas exterior.

1 tbl, 3 ex

FIELD: textile, paper.

SUBSTANCE: invention concerns methods of flax fiber dyeing and preparation for spinning and can be applied in textile industry. Combined method of dyeing and preparation for spinning involves deacidification, processing by digester dye solution for 90-95 minutes at 40-50°C, the solution including vat colour, sodium bicarbonate, sulfonol NP-3 and anhydrous synthanol, polyenzyme preparation with enzyme activity indicators, units per ml of solution: endopolygalacturonase - 20-40; pectinesterase - 2.5 - 8.0; protease - 0.2-0.4; exopolygalacturonase - 0.6-1.5; exogalactosidase - 0.3-0.5; exoxylosidase - 0.3-0.8; exoglucanase - 0.4-1.0. Further the mass is heated to the boiling point, matured for 30-60 minutes, flushed by cold water. Oxidising processing is performed for 15-25 minutes at 20-25°C in stabilised peroxide solution including 0.3-0.4 g/l of hydro peroxide (100%), 1-2 g/l of laundry soap, and alkaline agents to comprise total alkalinity of 5.5-6.0 g/l rated per caustic soda, with further heating for 20-50 minutes to 95-100°C and maturing for 20-30 minutes, followed by double flush with detergent first and with water next, and further deacidification at 45-50°C for 15-20 minutes and flushing.

EFFECT: reduced irregularity of geometrical parametres and durability of flax semiproducts; improved colorability and colour evenness of textile semiproducts; more environment-friendly process and improved labour health.

1 tbl, 3 ex

FIELD: textile industry, in particular, primary processing of long and short flax fibers, modified flax fibers of cotton and wool type, and of flax combings.

SUBSTANCE: solution contains enzymic preparations-cultural filtrates of Penicillium canescens and Trichoderma reesei microorganisms, surfactant and intensifier, said components being used in predetermined ratio.

EFFECT: decreased content of woody fibers and contaminants in flax fibers, increased tearing strength and decreased linear density of yarn produced from flax fibers.

1 tbl, 1 ex

How flax trusts // 2123547
The invention relates to industry primary processing of bast crops, namely the technology of preparation of trusts

FIELD: textile industry, in particular, primary processing of long and short flax fibers, modified flax fibers of cotton and wool type, and of flax combings.

SUBSTANCE: solution contains enzymic preparations-cultural filtrates of Penicillium canescens and Trichoderma reesei microorganisms, surfactant and intensifier, said components being used in predetermined ratio.

EFFECT: decreased content of woody fibers and contaminants in flax fibers, increased tearing strength and decreased linear density of yarn produced from flax fibers.

1 tbl, 1 ex

FIELD: textile, paper.

SUBSTANCE: invention concerns methods of flax fiber dyeing and preparation for spinning and can be applied in textile industry. Combined method of dyeing and preparation for spinning involves deacidification, processing by digester dye solution for 90-95 minutes at 40-50°C, the solution including vat colour, sodium bicarbonate, sulfonol NP-3 and anhydrous synthanol, polyenzyme preparation with enzyme activity indicators, units per ml of solution: endopolygalacturonase - 20-40; pectinesterase - 2.5 - 8.0; protease - 0.2-0.4; exopolygalacturonase - 0.6-1.5; exogalactosidase - 0.3-0.5; exoxylosidase - 0.3-0.8; exoglucanase - 0.4-1.0. Further the mass is heated to the boiling point, matured for 30-60 minutes, flushed by cold water. Oxidising processing is performed for 15-25 minutes at 20-25°C in stabilised peroxide solution including 0.3-0.4 g/l of hydro peroxide (100%), 1-2 g/l of laundry soap, and alkaline agents to comprise total alkalinity of 5.5-6.0 g/l rated per caustic soda, with further heating for 20-50 minutes to 95-100°C and maturing for 20-30 minutes, followed by double flush with detergent first and with water next, and further deacidification at 45-50°C for 15-20 minutes and flushing.

EFFECT: reduced irregularity of geometrical parametres and durability of flax semiproducts; improved colorability and colour evenness of textile semiproducts; more environment-friendly process and improved labour health.

1 tbl, 3 ex

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