Method of bleaching textile material (options)

 

(57) Abstract:

The invention relates to chemical technology of preparation of textile material, in particular to a method of bleaching a textile material. Describes a method of bleaching a textile material of natural fibers, or their mixture with chemical or synthetic fibers impregnated with 20-30oWith bleaching with an aqueous solution containing hydrogen peroxide, the composition Diurin on the basis of oksietilidendifosfonovaya acid, metasilicate or sodium silicate, caustic soda, non-ionic wetting agent based on ethoxylated fatty alcohols and optical bleach is a derivative of stilbene, with subsequent spin cycle, maintaining the material in a sealed volume within 18-48 hours, washing and drying. The method allows to reduce the consumption of electric energy and steam. 2 S. p. f-crystals, 2 tab.

The invention relates to chemical technology of preparation of textile material, and more particularly to a method of bleaching a specified material containing natural cellulose and/or chemical fibers, for release in the white form of and for the subsequent coloring.

Currently, there is a way of peroxide bleaching of fabrics containing cotton is. 153 to 155, C. 233-230), namely, that the specified material is impregnated with at elevated temperature with an aqueous solution of the following composition: hydrogen peroxide, caustic soda, Basilicata stabilizer - Prestige IB, non-ionic wetting - Taralon OL, Leaven M, optical bleach telenovela series, wring out, then kept in an airtight volume for at least 1 hour, washed with hot and cold water, and dried.

Method of bleaching textile material containing synthetic (chemical) fiber, spend the same composition at 50-100oC, followed by pressing, holding a sealed volume within 45-60 min, washing and drying (Safonov centuries the Finishing of textile materials. - M.: Legprombytizdat, 1991, S. 228).

The disadvantage of these methods is the high energy consumption required to produce steam and maintain the high temperature processing.

The objective of the proposed technical solution is to eliminate this drawback is the reduction in consumption of electricity and steam needed to create and maintain the desired temperature of treatment of textile material while maintaining its consumer properties.


Hydrogen peroxide (100%) - 2-4

Composition Diurin on the basis of oksietilidendifosfonovaya acid - 0,2-0,5,

Metasilicate or sodium silicate - 1,0-2,0,

Caustic soda (100%) - 1.5 to 2.5,

Non-ionic wetting agent based on ethoxylated fatty alcohols - 0,2-0,7,

The optical Brightener is a derivative of stilbene - 0.1 to 0.3,

Water - the Rest

the impregnation is carried out at 20-30oAnd keeping in a sealed volume within 18-48 hours.

In a variant of the method of bleaching textile material of synthetic fibers impregnated aqueous bleaching solution containing hydrogen peroxide, caustic soda, with the of moist material in a sealed volume, intensive flushing hot and cold water and drying in the stabilizer is used as metasilicate or sodium silicate as the wetting agent is a nonionic wetting agent based on ethoxylated fatty alcohols and in the bleaching solution further administered a composition of Diary on the basis of oksietilidendifosfonovaya acid in the following ratio, wt.%:

Hydrogen peroxide (100%) - 0,3-0,7,

Composition Diurin on the basis of oksietilidendifosfonovaya acid of 0.2-0.3,

Metasilicate or sodium silicate - 0,1-0,2

Caustic soda (100%) - 0,08-0,1,

Non-ionic wetting agent based on ethoxylated fatty alcohols - 0,2-0,3,

The optical Brightener is a derivative of stilbene - 0,005-0,1,

Water - the Rest

the impregnation is carried out at 20-30oWith, and keeping within 18-48 hours.

Under natural cellulose fibers in this case is understood as cotton, linen or mixtures thereof, and chemical - synthetic (polyester, polyethylene, polyamide - PA, polypropylene - PP) and synthetic (rayon, viscose modulus).

Composition Diurin based oksietilidendifosfonovaya acid known by THE 2638-023-17965829-98.

As nonionic with the mania).

As optical Brightener telenovela range of preferably use Belfor ABOUT, IB.

Next, explain the essence of the proposed technical solutions specific examples of the method are given in table. 1.

Each of the specified table. 1 variants is carried out in the following order: textile material is first impregnated at plusvocal machine containing the appropriate example components of the composition at the corresponding temperature of the solution, wring out preferably 70-100%, Packed in a sealed volume (e.g., polyethylene film), incubated for the appropriate time, and then intensively washed with hot (70-90oC) and cold water to the washing machine and dry contact or convection through.

In table. 2 shows the results of the treatment of textile material and consumption of electricity and steam.

The data table. 2 show that the textile materials treated by the proposed method are qualitative indicators higher than processed by the prototype. This reduces energy costs by 60%, and a pair of 70%.

1. Method of bleaching textile materalisim solution contains hydrogen peroxide, caustic soda, stabilizer, wetting and optical bleach - stilbene derivative, followed by pressing, keeping hydrated material in a sealed volume, intense flushing hot and cold water and drying, characterized in that the stabilizer is used as metasilicate or sodium silicate as the wetting agent is a nonionic wetting agent based on ethoxylated fatty alcohols, and in the bleaching solution further administered a composition of Diary on the basis of oksietilidendifosfonovaya acid in the following ratio, wt.%:

Hydrogen peroxide 100% - 2-4

Composition Diurin based oxoethylidene diphosphonic acid - 0,2-0,5

Metasilicate or sodium silicate - 1,0-2,0

Caustic soda 100% and 1.5 - 2.5

Non-ionic wetting agent based on ethoxylated fatty alcohols - 0,2-0,7

The optical Brightener is a derivative of stilbene - 0,1-0,3

Water - the Rest

the impregnation is carried out at 20-30oAnd keeping in a sealed volume within 18-48 hours

2. Method of bleaching textile material of synthetic fibers impregnated aqueous bleaching solution containing hydrogen peroxide, caustic soda, is the use of moist material in a sealed volume, intensive flushing hot and cold water and drying, characterized in that the stabilizer is used as metasilicate or sodium silicate as the wetting agent is a nonionic wetting agent based on ethoxylated fatty alcohols, and in the bleaching solution further administered a composition of Diary on the basis of oksietilidendifosfonovaya acid in the following ratio, wt.%:

Hydrogen peroxide 100% - 0,3-0,7

Composition Diurin on the basis of oksietilidendifosfonovaya acid - 0,2-0,3

Metasilicate or sodium silicate - 0,1-0,2

Caustic soda 100% - 0,08-0,1

Non-ionic wetting agent based on ethoxylated fatty alcohols - 0,2-0,3

The optical Brightener is a derivative of stilbene - 0,005-0,1

Water - the Rest

the impregnation is carried out at 20-30oWith, and keeping within 18-48 hours

 

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2 tbl, 6 ex

FIELD: light and fur industry.

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2 tbl

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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.

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2 tbl

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

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

2 tbl, 5 ex

FIELD: chemistry.

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18 cl, 7 tbl, 18 ex

FIELD: chemistry.

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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: 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, 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.

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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 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, 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

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