Method for antifungal and antibacterial leather treatment

FIELD: tannery industry.

SUBSTANCE: claimed method includes treatment of chrome-tanned semi-finished product with antiseptic such as polymineral obtained from natural non-metal fossils (minerol), which is used in amount of 5-10 mass % based on semi-finished product. Minerol is also used as filler being introduced in retanning step with chrome compounds in amount of 5-10 mass % based on semi-finished product.

EFFECT: effective biological leather conservation after chrome tanning.

3 cl, 1 tbl

 

The invention relates to methods of antifungal and antibacterial treatment of leather for their preservation and transportation.

In recent years, the skin is not only ready, but in the different types (raw hides and skins, pickled, after the previous working tanned, tanned and semi-finished product).

These skin are often transported or stored in places that are not suitable for preservation, where sanitary conditions are such that contribute to infection of the skin by bacteria or fungi. To ensure the required quality of the skins use different antibacterial or antifungal solutions that are used in the processing at each stage of obtaining skin.

Known methods of processing leather products, which include compounds with antifungal or antimicrobial actions, such as water-soluble benzoquinonediimine resin. C. the USSR №1348372, With 14 9/00, 1987) isothiazolone, methyl esters of Z-3-(2-naphthalenesulfonyl) - propanolol acid (Pavlenko GO "Methods of obrobki SCR C-meta ïx antibacterialï obrobki", "Problems of light and textile industry", S. 123, , Kherson, 1999).

However, these products after treatment of the skin in continuous operations are in the waste and hard deleted, for example when the collagen with high pulse energy is A. Special products are in the wastewater after treatment of the skin, leading to unacceptable environmental pollution. They can also interfere with the finish of the leather, for example, after tanning.

Also known way antifungal and antibacterial treatment of the skin, including seepage chrome-plated semi-finished product with antiseptic (patent of Russia №2052507, IPC 14 9/00, 1996). As an antiseptic use salts of lanthanum or cerium vinylcarbazole acids, for example salts of acrylic and methacrylic acid, in amounts of 0.02-1.25% in terms of oxide of lanthanum or cerium by weight of raw hides. This antiseptic cleaner. This antiseptic handle the hide or tanned skin. However, the use of well-known antiseptic that is manufactured abroad, leads to a decrease in the price of domestic exports of leather due to the lack of a wide range of local antiseptics for transportation and the effective conservation of biological standpoint skin after tanning.

The basis of the invention is the task of establishing such a way antifungal and antibacterial leather processing, in which by changing the conditions of operations has provided effective conservation of biological standpoint skin after tanning.

Put ass the cha is achieved by that way antifungal and antibacterial treatment of the skin, including seepage chrome-plated semi-finished product with antiseptic, according to the invention, as an antiseptic use mineral product derived from natural minerals non-metallic minerals.

Suitable mineral product derived from natural minerals non-metallic minerals, take in the amount of 5-10% by weight of the semifinished product.

In addition, mineral product derived from natural minerals non-metallic minerals, additionally used as a filler, is injected in the amount of 5-10% by weight of the semifinished product.

Handling of chromium prefabricated environmentally friendly domestic mineral product derived from natural minerals non-metallic minerals in the amount of 5-10% by weight of semi-finished product, helps to protect the semi-finished product from the mold during its transportation and save on some time before the final treatment of the skin, thus effectively saving from a biological point of view leather after tanning.

Introduction mineral product derived from natural minerals non-metallic minerals, under retanning as filler, when it is assumed 5-10% by weight of semi-finished product, both who provides effective conservation of biological standpoint skin after tanning with good filling properties.

Mineral product derived from natural minerals non-metallic minerals - mineral (THE Ukraine №46.15.292-97)is a feed additive therapeutic effect for animals. It includes thermal-chemically activated montmorillonite is the main rock-forming mineral content of a wide range of mineral elements in the form of oxides: silicon - up to 60%, aluminum up to 15%, iron 10%, calcium - up to 5%, magnesium 4%, titanium up to 2%, manganese up to 1%, potassium - up to 1%, sodium 1%, sulfur up to 0.5%, phosphorus 0.5%. Of scientific-technical and patent literature is unknown, its use as an antiseptic tanning semi-finished product.

Using the stated antiseptic in the amount of 5-10% by weight of semi-finished product showed that its antibacterial properties are more long-term in these limits and reach up to 28 days.

Solution for processing semi-finished, containing mineral 5-10% by weight of cement, may be used in one or together with a solution for tanning. This protivogribkovi and antibacterial solution suitable for processing of the tanned leather to protect them from mold and wet-blue has good filling properties.

The method was carried out as follows.

The semi-finished product obtained from the skins of bikini light, the processing which the CSOs in the process of tanning was performed according to the existing method of production of leather for the uppers. After that they used the two-phase method of tanning, where the first stage is made of chromium compounds 1% in recalculation on Cr2About3at a temperature of 20-25°C. the Duration of the process is 12 o'clock the temperature of the welding equals 98°C. the Second stage of the retanning was made of chromium compounds with the expenditure of 1% in recalculation on Cr2About3and with the cost of "Mineral" 5-10% by weight of sliced chrome semi-finished product at a temperature of 25-30°and LC=0,6 for 3 hours under continuous rotation of the drum.

Studies on the infection of the skin mold was carried out on small samples of skin that was treated cells of microbes in the amount of 1x105cells on 1 cm2skin. Processed by microbes, the sample was placed in a medium of agar, which is poured into a Petri dish, and seeded with a suspension of the corresponding microbial mold according to GOST 15592-76. Samples of chrome semi-finished product obtained after retanning, and samples of chrome semi-finished product, which is usually called the "wet-blue", impregnated with a solution which contains antiseptic - mineral product derived from natural minerals non-metallic minerals "Mineral" with the content of 5-10% by weight of planed material was placed in a desiccator with a capacity of 3 l, above the water, the desiccator was placed in a thermostat and samples ove the terms of 30 days was kept at a temperature of 28-30° C and relative humidity of 90-95%. Observations were made every 7 days. Skin is considered resistant to the development of mouldy fungi, if within 30 days it is not observed development Miceli mouldy fungi, visible to the naked eye.

The results of the research are given in the table.

IndicatorsExamples
123456789
Antiseptic - mineral, %15810155
Filler - mineral, %51053
Resistance to mould, days102828282028282814
Temperature welding, °102103105105100103104105/td> 100
the pH of the waste liquida 4.95,05,2of 5.44,86,06,2of 5.45,2
Thickness, mm1,701,731,751,781,731,711,891,761,71

Studies have shown, when the content of mineral in the claimed range (examples 2-4) as an antiseptic and filler (examples 6, 7), regardless of how you entered mineral in solution, antibacterial nature of the semi-finished product is observed for 28 days, with a graph of the resistance to mould has a curvilinear in nature with a maximum point, which is achieved in the claimed bounds.

1. The way antifungal and antibacterial treatment of the skin, including seepage chrome-plated semi-finished product with antiseptic, characterized in that as an antiseptic use mineral product derived from natural minerals non-metallic minerals.

2. The method according to claim 1, characterized in that the mineral product derived from natural minerals non-metallic minerals, take in the amount of 5-10% by weight of the semifinished product.

3. The method according to claim 1, characterized in that the floor is mineral product derived from natural minerals non-metallic minerals, additionally used as a filler, is injected in the amount of 5-10% by weight of the semifinished product.



 

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FIELD: tannery industry.

SUBSTANCE: claimed method includes treatment of chrome-tanned semi-finished product with antiseptic such as polymineral obtained from natural non-metal fossils (minerol), which is used in amount of 5-10 mass % based on semi-finished product. Minerol is also used as filler being introduced in retanning step with chrome compounds in amount of 5-10 mass % based on semi-finished product.

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3 cl, 1 tbl

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