Method for whitening of flax fiber for producing of wool

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

 

The invention relates to the textile industry, in particular to the chemical processing of textile materials, and more specifically to the bleaching of flax fiber for receiving absorbent cotton for medical purposes.

There is a method of bleaching of flax fibers in the roving, which consists in oxidizing cooking fibers, cislovanie and intermediate leaching water. Textbook New in theory and practice of the technology of bleaching cotton and linen fabrics. M: Light industry, 1976, equivalent.

The disadvantage of this invention is lightweight and insufficient impact on the fiber. This is due to the fact that flax fiber rovings subjected to preliminary mechanical and chemical treatment to remove undesirable impurities. In addition, the requirements to the quality of the fibers in the roving significantly lower content of related substances, which are not standardized for this type of products.

There is a method of bleaching of flax fiber for receiving wool, consisting of preliminary mechanical processing, chemical finishing of fiber in caustic soda, cislovanie sulfuric acid, the bleaching solution and the intermediate leaching water and final machining, RF patent №2104358, 1996, the closest equivalent.

However the com this method is used for blanching of toxic chlorinated chemicals and low quality of the product, as well as the complexity of the process.

The closest analogue of the claimed method is a method of production of cotton, which consists in the fact that the fiber is subjected to reductive cooking, acidification with sulfuric acid, followed by bleaching with hydrogen peroxide, bleaching produce a composition containing hydrogen peroxide, caustic soda, stabilizer and non-ionic wetting agent, patent RF №2078163.

The disadvantage of this method are the increased energy consumption, as the degumming is carried out at temperatures above 100°, that is, when the excessive pressure. Such conditions lead to defatting of the fiber and, consequently, increase its rigidity, electrified, which has a negative effect in the future on the process of scratching bleached fibers.

The aim of the invention is to remedy these shortcomings is the closest analogue and the achievement of high quality wool for medical purposes from linen, including modified, fiber, decrease energy costs with a simplified process of its receipt.

This object is achieved in that a method of bleaching of flax fiber for receiving wool, includes oxidizing the cooking environment caustic soda, bleaching aqueous solution in the following ratio of components, g/l:

Hydrogen peroxide (100%)2,0-7,0
Caustic soda (100%)3,0-8,0
The stabilizer composition of Diary based
oksietilidendifosfonovaya acid0,3-0,7
Non-ionic wetting0,4-0,1
Softner Tracker IFG0,5-2,0

rinse with hot water at a temperature of 60-70°and avevano processing solution preferably containing softening agent based on fatty acids in quantities of 0.5-1.0 g/l after the final wash.

Comparative analysis of the proposed technical solutions and analogues shows that it is not known and not obvious from the prior art, that is new and involves an inventive step.

Hereinafter the invention will be shown by the example of execution.

The raw material for the production of cotton is a linen fiber (short tow-linen yarn production waste). Flax fiber is subjected to mechanical processing, clean up zakostrennost not more than 1.5% of the processing in the blowroom machines in the prep Department.

The obtained semi-product is loaded into the boiler and put kislovka at a temperature of 50-60°C for 20-30 minutes with an aqueous solution of composition, g/l:

Sulfuric acid (100%)1-3
Non-ionic wettingof 0.1-0.3

Next, the fiber is washed with hot water in the boiler at a temperature of 50-70°two times for 15 minutes. Then the fiber is subjected to oxidative cooking, preferably in an aqueous solution composition containing, g/l:

Hydrogen peroxide (100%)3,0-5,0
Caustic soda (100%)8,0-10,0
The stabilizer composition of Diary based
oksietilidendifosfonovaya acidof 0.1-0.3
The nonionic wetting agent type0,5-1,0
for example, the wetting EM LC based on ethoxylated fatty alcohols.
Total alkalinity9,0-11,0

Heating of the solution is to 95-100°C for 45-60 minutes. Cooking at this temperature is within 60-90 minutes.

Next, the fiber is washed with hot water at a temperature of 50-70°two times for 15 minutes. Then the fiber bleach composition containing hydrogen peroxide, caustic soda, stabilizer based on oksietilidendifosfonovaya acid and non-ionic wetting agent based on ethoxylated fatty alcohols in the following with the composition of the components, g/l:

Hydrogen peroxide (100%)2,0-7,0
Caustic soda (100%)3,0-8,0
The stabilizer composition of Diary based
oksietilidendifosfonovaya acid0,3-0,7
Non-ionic wetting0.3 to 1.0
Softner Tracker IFG0,5-2,0

Heating is carried out until 95-100°C for 45-60 minutes. Bleaching at a given temperature is made within 60-90 minutes. Then rinse with hot water at a temperature of 60-70°C for 15 minutes and kislovka sulfuric acid solution of 1-3 g/l at a temperature of 25-50°C for 15 minutes. Next, the fiber is rinsed hot and cold water. In conclusion, spend avevano processing solution containing a softening agent on the basis of higher fatty acids in quantities of 0.5-1.0 g/L.

Examples 2-5 the method of blanching by the present invention are shown in table 1.

The quality parameters of cotton of flax fibers obtained by the method in examples 2-5 in table 2.

Table 2 shows that all the required quality parameters Wat is that obtained according to the invention, exceed the parameters of the prototype, GOST and hygienic requirements of surgical cotton.

The proposed method of bleaching of flax fiber can be implemented in an industrial environment on available for these purposes, equipment which does not require significant changes in chemical technology. Chemicals are available and are manufactured on an industrial scale domestic enterprises.

1. Method of bleaching of flax fiber for receiving wool, including oxidative boiling in the environment of caustic soda, followed by a bleaching solution containing the following components, g/l:

hydrogen peroxide (100%)2,0-7,0
caustic soda (100%)3,0-8,0
the stabilizer composition Varina based
oksietilidendifosfonovaya acid0,3-0,7
non-ionic wetting agent based
ethoxylated fatty alcohols0.3 to 1.0
softner Tracker IFG0,5-2,0

washing with hot water with a temperature of 60-70°and avevano processing after the final wash.

2. The method according to claim 1, characterized in that avevano processing lead RA is TAROM, containing softening agent on the basis of higher fatty acids in quantities of 0.5-1.0 g/L.



 

Same patents:

The invention relates to the pulp and paper industry and can be used in the manufacture of filter paper and cardboard used in the filters of thin clearing of aviation fuel and other operating fluids

The invention relates to the textile industry and can be used for the production of medical cotton of flax of raw materials

The invention relates to the pulp and paper industry, in particular to the question of the production of filter materials, which will find application in engineering, medical, food and other industries when cleaning fluids and air from mechanical impurities and other foreign inclusions

The invention relates to the textile industry and can be used for the production of medical cotton of flax of raw materials

The invention relates to methods for producing a sheet of fibrous filtering materials (paper and cardboard) and is intended for use in the pulp and paper industry in the manufacture of paper filtering media for filtering liquids and gases, preferably air

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

The invention relates to the finishing of the textile industry

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

The invention relates to chemical technology of preparation of textile material, in particular to a method of bleaching textile material

The invention relates to chemical technology of bleaching textile materials of wool and silk fibers

The invention relates to household chemicals, in particular to a composition for bleaching textile materials

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

Up!