Method for biocide treatment of tanning semi-finished product

FIELD: textile fabrics, paper.

SUBSTANCE: invention is related to chemical technology of fibrous materials, in particular to biocide treatment of tanning semi-finished products. Method consists in application of aqueous composition onto material with 0.035-0.09 g/l of AB katamin and potassium iodide taken in the ratio of 10:1, and 0.03-0.06 g/l of nanosize silver particles preparation. Preparation is a water dispersion with concentration of Ag+ 0.15-1.5 wt %, nanoparticle size 5-20 nm, and maximum optical density in the area of waves length of 315-540 nm. Components are applied simultaneously or serially with interval of 5 minutes at 30 C and total duration of processing of 10 minutes. Composition is applied by spraying or impregnation at roller machine, or at the stage of the last washing of semi-finished product in drum with liquid coefficient that equals 3.

EFFECT: invention provides for expansion and improvement of biocide treatment action spectrum, and also reduction of applied preparation consumption.

4 cl, 1 tbl, 3 ex

 

The invention relates to chemical technology of fibrous materials, in particular for the biocidal treatment of the leather and semi-finished products.

To ensure the biosecurity of natural fibers and products made of them used a variety of chemical compounds on the basis of Quaternary ammonium bases.

A method of processing natural textile materials antimicrobial aqueous composition comprising alkyldimethyl Manihari (ketamin AB) and potassium iodide (RF patent No. 2178029, publ. 10.01.2002, D06M 11/13).

The disadvantage of this method is the high consumption of biocidal products, adverse side effects occurring during operation of the finished products, environmental pollution and insufficient spectrum of antimicrobial action.

There is a method of skin treatment the introduction of ketamine HA alkyldimethylbenzylammonium on stage dyeing. This product is used as the acid corrosion inhibitor (patent RF 2096468, 20.11.1997, D06P 3/32).

The known method anti musty skin treatment impregnation its water-soluble antiseptic copolymer NjN-dimethyl -, N,N-diallylammonium with sulfur dioxide (RF patent 2151193, 20.06.2000, SS 9/00). The disadvantage of this method is the high consumption of anti musty preparation, insufficient spectrum of antimicrobial action.

There is a method of anti-Christ. mikrobnoi material handling according to which the polymer substrate is cleaned with chemicals and washed with water. Then treated with an aqueous solution of tin, washed from excess salt water and treated with an aqueous solution of silver salts in the presence of a reducing agent. You get a thin layer containing silver nanoparticles. The resulting layer is stabilized in the solution containing the chlorides of gold or platinum metals, washed and dried in air (U.S. patent No. 6224983, publ. 01.05.2001).

The disadvantage of this method is the high cost of the material obtained, the use of chemical reducing agents in the process of obtaining, because of what the process is unstable.

The closest analogue of the claimed method is a method of liquid treatment of leather prefabricated, includes the processes of fatliquoring and antimicrobial treatment with the consumption of antimicrobial drug to 4% by weight of the semifinished product. As of antimicrobial drug use acidifier - 1,5-2,0%, 2,4,5-trichlorophenol - 0,75-1,0% or inhibitor of wood-resin 3-4%. The processing time of 2-3 hours at a volume ratio (LCD) - 1 and a temperature of 45-50°C ("uniform method of production of Russian leather footwear and saddlery frominternational tanning of the hides of cattle for delivery by state order". M: cniitei Legprom, 1987).

The disadvantage of the method which is the high consumption of antimicrobial drug and the narrow range of its validity.

The technical task of the invention is the improvement and expansion of the spectrum of biocidal treatments and reducing the consumption of the drug.

The problem is solved due to the fact that the biocidal treatment of leather prefabricated carried out by applying to him aqueous composition containing a 0.035-0.09 g/l of catamine AB and potassium iodide, taken in the ratio of 10:1, and 0.03-0.06 g/l of the preparation of nanoscale silver particles in aqueous dispersion with a concentration on Ag+of 0.15-1.5 wt.%, pH 8-9, the particle size of 5-20 nm, and the maximum optical density in the wavelength 315-540 nm, with liquid ratio equal to 2, the components of the composition applied simultaneously or sequentially with an interval of 5 minutes.

Antimicrobial treatment is carried out or when the last water washing of the cake mix in the drum when liquid ratio (LCD) - 2, or by applying a biocidal composition on the front surface of the semi-finished product to the spray unit, or application at the entrance roller ginning machine with a flow rate of 90-120 g/m2on the semi-finished product from raw pork and 100-120 g/m2on the semi-finished cattle.

The method is as follows.

Semi-finished leather, designed for Shoe lining from raw materials of bovine or swine, after the process is dyeing, the fatliquoring and the 1st wash, at the stage of the 2nd rinse treated with an aqueous composition of a biocidal product, including the water dispersion of silver nanoparticles with a concentration of 0.03-0.06 g/l in the biocidal product, counting on the dry residue and the aqueous solution of catamine AB and potassium iodide at a ratio of 10:1 with a concentration of a 0.035-0.09 g/l in the biocidal product, counting on the dry residue of the drug. The treatment is carried out at a temperature of 30°C for 10 minutes Then after aging and spin - wiring the semi-finished product is dried in a free state to a moisture content of 14-16% in accordance with the method of production of leather for Shoe lining.

Possible application of the biocide composition on the front surface of leather prefabricated by sputtering technique or application at the entrance roller ginning machine, followed by aging and drying to a moisture content of 14-16%.

The invention is illustrated by the following examples.

Example 1. The processing of leather and chrome semi perform in hanging dryer with LCD - 2 and a temperature of 30°C. After dyeing, fatliquoring and the first rinsing water is drained. At the stage of the 2nd washing in the drum with a half-filled water to the LCD - 2 and enter the water dispersion of silver nanoparticles with a concentration on Ag+to 0.15 wt.% and pH 8-9 to a concentration of 0.03 g/L. the rotation of the drum is provided by 5 min, after which the injected water is the solution catamine AB and potassium iodide to the total concentration of biocidal drug 0.11 g/l, counting on the dry matter. The rotation of the drum carried out for another 5 min and produce plums. After aging, and the spin-wiring the semi-finished product is dried in a free state to a moisture content of 14-16%.

Example 2. Processing of leather prefabricated perform in the drum when the LCD - 2, a temperature of 30°C. In the dryer with a half-filled water to the LCD - 2 and injected sequentially aqueous dispersion of silver nanoparticles with a concentration of Ag+1.5 wt.% to a concentration of 0.06 g/l and water system katamin AB + potassium iodide to the total concentration of biocidal components in a solution of 0.15 g/l, counting on a dry residue. The rotation of the drum carried out for 10 minutes, then drain as in example 1.

Example 3. Processing of semi-finished leather produced in roller ginning machine application biocidal composition comprising 0.03 g/l of the preparation of nanoscale silver particles with the concentration of Ag+ to 0.15 wt.%, water system katamin AB and potassium iodide with a concentration of 0.035 g/l Consumption for semi-finished cattle - 100-120 g/m2. Consumption of semi-finished product from raw pork 90-100 g/m2. The time of impregnation 2 minimum Temperature of 30°C. Further processing is carried out in accordance with example 1.

The investigation of the antimicrobial properties were carried out on samples of materials containing in the structure of silver nanoparticles and cluster catamine AB with potassium iodide.

ispolzovalis strains of the bacteria Staphylococcus aureus and Escherichia coli, which was applied to the samples at the rate of 104SOME 1 cm2square. Samples with high humidity of 90% was placed in a thermostat at 37°C for 2 and 7 days. After sowing with a dense nutrient medium (TSA, trypticase-soy agar) samples were incubated 48 h at 37°C.

The results are presented in the table.

Table
Comparative characteristics of the biocidal activity of the leather for Shoe lining treated with compounds.
ExampleThe amount of the compound mass, % (active part) is added to semi-finished leatherThe content of the test cultures of bacteria on the skin samples, SOME on 1 cm
Staphylococcus aureusEscherihia coli
2 dayday 72 dayday 7
10,039not detecting.not detecting.not detecting.not detecting.
2 of 0.066not detecting.not detecting.not detecting.not detecting.
30,003not detecting.not detecting.not detecting.not detecting.
Prototype: 2-oxydiethanol 2,4,5-trichlorophenol inhibitor wood-resin1,5-2,0
0,75-1,0
3-4
20010010050

1. The way the biocidal treatment of leather prefabricated coating material aqueous composition containing a 0.035-0.09 g/l of catamine AB and potassium iodide, taken in the ratio of 10:1, and 0.03-0.06 g/l of the preparation of nanoscale silver particles in aqueous dispersion with a concentration on Ag+of 0.15-1.5 wt.%, the particle size of 5-20 nm and the maximum optical density in the wavelength 315-540 nm, and the components of the composition applied simultaneously or sequentially with an interval of 5 min at 30°C and the total processing time 10 minutes

2. The method according to claim 1, characterized in that the aqueous composition is applied on the front surface of the semifinished product by spraying method.

3. The method according to claim 1, otlichalis the same time, that the aqueous composition is applied to the material application on the value of the car at a flow rate of the water composition 90-100 g/m2on the semi-finished product from raw pork and 100-120 g/m2on the semi-finished cattle.

4. The method according to claim 1, characterized in that the aqueous composition is applied to the material during its last washing in the drum with liquid ratio equal to 3.



 

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