Method of bleaching of flax roving

FIELD: textiles, paper.

SUBSTANCE: method comprises acid treatment, reducing boiling and oxidation treatment with the solution of hydrogen peroxide at a temperature from 95 to 100°C, avivage and washing between the technological operations first with hot and then cold water. The acid treatment is carried out with the preparation which is a composition comprising sulfamic acid with a concentration of 0.5 to 2.0 g/l. The boiling is carried out for 40 to 90 minutes using as a reducing agent the composition containing derivatives based on sulfinic acid with a concentration of 0.5 to 2.5 g/l and the reducing agent with the complexing additives with a concentration of 1.5 to 2.5 g/l.

EFFECT: improving the whiteness level of flax roving.

3 cl, 1 tbl

 

The invention relates to the textile industry, in particular for bleaching of flax rovings.

There is a method of bleaching flax rovings comprising: kislovka, reductive degumming and oxidative treatment with a solution of hydrogen peroxide at a temperature of from 95 to 100°C., washing with water prior and between process operations. (Patent CN 1144279A, D01C 1/00, 05.03.1997.).

This kislovka is carried out for 10 min at a temperature of 20-30°C With a solution containing sulfuric acid and 5 g/l and lubricant - 0.5-2.0 g/l, the degumming is carried out for 30-60 min at 95°With a solution containing: wetting - 0.5-2.0 g/l, sodium hydroxide 100% - 2-7 g/l, hydrosulfite sodium - 6-10 g/l, sodium sulfide - 4-8 g/l anthraquinone - 2-5 g/l, the bleaching solution of hydrogen peroxide (100%) - 3-7 g/l, the stabilizer of hydrogen peroxide - 5-10 g/l wetting agent and 0.5-2.0 g/l at 70°C for 30-90 minutes

The disadvantage of this method is the counterpart is lower white flax rovings than in the present invention. This can be explained by less effective reducing agents at high concentrations under otwarcie. In the main indicator of the quality of the Rove - white is 55-65%.

Before the invention of the goal of the project eliminate this drawback and to obtain the technical result of the expression is dealing in the increase in the level of white flax rovings, intended for further processing into yarn.

The technical result is achieved in that in the method of bleaching flax rovings, including kislovka, reductive degumming and oxidative treatment with a solution of hydrogen peroxide at a temperature of from 95 to 100°C, avevano processing and rinsing between technological operations, first hot and then cold water, kislovka carry out the preparation of compositions comprising sulfamic acid or sulfuric acid with a concentration of 0.5-2.0 g/l, the degumming is carried out for from 40 to 90 min using as the reducing agent composition containing derivative works based on sulfinol acid of a concentration from 0.5 to 2.5 g/l and the reducing agent with complexing additives with a concentration of from 1.5 to 2.5 g/L.

In addition, the technical result is achieved by the fact that for 10-20 min before the end of the process otwarte additionally injected the drug, which is a combination sulfinol acid, with a concentration of from 0.2 to 0.4 g/l,

Technical result is achieved that, when the oxidation treatment with hydrogen peroxide solution concentration of organic stabilizer containing composition complexing agents, ranges from 0.13 to 0.17 g/L.

Below are examples of the method of bleaching flax rovings.

Operation modesA specific example of the method according closest analogueExamples of the proposed method
123
Water rinse---
KISLOVKA
Time min10101520
the solution temperature, °C25303540
A solution containing:
sulfuric acid, g/l5-- -
the wetting agent, g/l1,50,30,350,4
Composition-
includes
sulfamic acid
or sulfuric acid, g/l0,51,52,0
Water rinse-
The DEGUMMING

60
Time min454090
Temperature, °C959598100
The wetting agent, g/l1,50,40,50,6
Sodium hydroxide 100%, g/l4,5345
Hydrosulfite sodium, g/l8---
Sodium sulfide, g/l6---
Anthraquinone, g/l3,5---
Composition containing-0,51,52,5
derivative-based
sulfinol acid, g/l
The restorer-1,52,02,5
complexing additives, g/l
or optional 10--0,20,30,4
20 min before the end
cooking medication
which connection
sulfinol acid
Water rinse
BLEACHING
Hydrogen peroxide (100%), g/l5,03,03,34
Caustic soda (100%), g/l-2,03,04,0
The stabilizer peroxide7,50,100,150,20
hydrogen, g/l
The wetting agent, g/l1,5---
Hydrophilic softener,-0,51,01,5
g/l
Temperature, °C709598100
Time min60406090
AVIVASA PROCESSING
Acetic acid (ice.), g/l-0,51,01,5
Aviary preparation, g/l-0,300,330,40

The combined use of the proposed invention the reducing agent provides a synergistic effect which increases the efficiency of their impact on the rovings. In the processing of flax rovings indicated in table modes is achieved white in 65-70%, while the closest analogue white only reaches values of 55-65%. The strength of flax yarn from flax rovings, processed according to the invention meets the requirements of GOST on linen yarn.

The proposed method can be implemented on an existing is the equipment periodic operation at the existing enterprises with the use of drugs, available on the market of chemicals.

1. Method of bleaching flax rovings, including kislovka, reductive degumming and oxidative treatment with a solution of hydrogen peroxide at a temperature of from 95 to 100°C, avevano processing and rinsing between technological operations, first hot and then cold water, characterized in that kislovka carry out the drug, which is a composition comprising sulfamic acid with a concentration from 0.5 to 2.0 g/l, the degumming is carried out for from 40 to 90 min using as the reducing agent composition containing derivative works based on sulfinol acid of a concentration from 0.5 to 2.5 g/l and a reducing agent complexing with additives with a concentration of from 1.5 to 2.5 g/L.

2. Method of bleaching according to claim 1, characterized in that for 10-20 MINDO process otwarte additionally injected the drug, which is a combination sulfinol acid, with a concentration of from 0.2 to 0.4 g/L.

3. Method of bleaching according to claim 1 or 2, characterized in that when the oxidation treatment with hydrogen peroxide solution concentration of organic stabilizer composition of complexing agents is from 0.13 to 0.17 g/L.



 

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FIELD: chemistry.

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EFFECT: disclosed composition has a synergetic stabilising effect compared to existing stabilisers.

28 cl, 5 tbl, 8 ex

FIELD: textile, paper.

SUBSTANCE: cellulose-containing textile material is processed in a bleaching solution, which contains hydrogen peroxide, diarin, which is a mixture of aqueous solutions of sodium salts of phosphorus-containing complexons, carbamide, a penetrating agent EM. Diarin is mixture of aqueous solutions of sodium salts of phosphorus-containing complexons. The penetrating agent EM is a composition based on anion-active and non-ionogenic surfactants. Besides, treatment in the bleaching solution is carried out simultaneously with ultrasonic exposure at the frequency of 25-35 kHz, capacity of 1.5-2.5 kW for 20-30 minutes.

EFFECT: invention makes it possible to considerably reduce power inputs, to increase material quality, to improve process ecological compatibility and to reduce its labour intensiveness.

1 tbl

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

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.

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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: textiles, paper.

SUBSTANCE: invention relates to the field of primary processing of bast crops, in particular flax. The method comprises exposing the straw to superweak high frequency electromagnetic field, followed by separation of flax fibre. Exposure the straw to superweak high frequency electromagnetic field is carried out with the polyethylene film contact angle of not less than 63 degrees, which is preliminary treated with this field for 10-30 minutes. The straw is exposed with superweak high frequency electromagnetic field with the wavelength of 200-204 nNm and tension of less than 0.1 mMcTtl within 7-10 days.

EFFECT: reduction of energy consumption and labour intensity is ensured, reduction of duration of the method while maintaining high yield of quality fibre.

3 cl

FIELD: agriculture.

SUBSTANCE: method covers stimulation of stock long-fibred flax ageing process and refers to linen industry, specifically to primary flax treatment. Climb flax strips on flax fields are moistened with humate solution "Plodorodiye" in 3-5 days after pulling of concentration 0.01-0.05 % in amount 250-400 litres per one hectare of treated area.

EFFECT: more rapid stock ageing under field conditions accompanied by quality increasing; reduced risks of raw flax; early field disposal for further farm works; excess over stock requirement.

1 ex

FIELD: primary processing of bast crops.

SUBSTANCE: method involves processing flax stems under field conditions with 1-2%-aqueous solution of carbamide at flow rate of solution of 200-600 ml per 1 kg of flax straw; initially processing strip top part after slight natural drying of stems, then strip lower part, immediately after first strip winding process.

EFFECT: intensified seasoning of fiber, reduced loss of quality of raw material and intensity of harvesting works, and also, process does not need substantial capital expenses.

1 ex

The invention relates to the textile industry, namely, textile raw flax fiber

The invention relates to pulp and paper industry and can be used to obtain soluble cellulose from cotton linters, intended for the production of chemical fibers

The invention relates to methods for trusts of bast crops

The invention relates to the extraction equipment for fibrous materials and can be used in the textile industry in the preparation of fibrous materials of vegetable and animal origin to spinning, as well as in the food industry for production of dietary fiber from fruit and vegetables

FIELD: primary processing of bast crops.

SUBSTANCE: method involves processing flax stems under field conditions with 1-2%-aqueous solution of carbamide at flow rate of solution of 200-600 ml per 1 kg of flax straw; initially processing strip top part after slight natural drying of stems, then strip lower part, immediately after first strip winding process.

EFFECT: intensified seasoning of fiber, reduced loss of quality of raw material and intensity of harvesting works, and also, process does not need substantial capital expenses.

1 ex

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