The method of soaking fur raw materials

 

The method relates to the soaking fur raw materials and can be used in the fur industry. Fur raw materials are treated with an aqueous solution Manchurian walnut, taken in an amount of 9.0 to 20.0 g/L. the Technical result is to increase the quality of fur raw materials and increase its shelf life. table 2.

The invention relates to the fur industry and can be used for soaking canned fur raw materials.

A: soaking off is one of the most important preparatory operations dressing furs, contributing to the successful course of subsequent technological processes and obtaining a semi-finished product of high quality. The result of soaking as absorption and distribution of moisture in the skin increases its softness, flexibility and the ability of proteins to interact with the chemical reagents used in subsequent operations for the dressing.

It is known that the effectiveness of soaking closely depends on the composition otmakhova solution. It is also known application for soaking various antiseptics, in particular sodium chloride, calcium hypochlorite, sodium bisulfite, sodium silicofluoride and other

Significant acceleration of soaking you on the lei, surface-active substances (surfactants), antibiotics and enzymes, as well as auxiliary materials of complex action (Purim J. A. Technology of manufacture of fur and sheepskin raw material. - M: Light and food industry, 1983. S. 37-40).

The proper conduct of soaking helps to improve product quality and reduce production times.

There is a method of soaking fur raw materials, which includes 2 stages: 1st stage: soaking off for 12 to 16 hours in a solution containing a preservative (sodium silicofluoride) and hydrosulfite sodium, 2nd stage is performed in the presence of enzymes for 18-20 hours at pH 5 (Aronia Y. N. Technology dressing and dyeing of fur. - M: Light and food industry, 1981. - 29 S.).

The disadvantage of this method is that silicofluoride sodium belongs to the category of toxic substances and is poorly soluble in water, resulting in additional measures are necessary for its dissolution and subsequent utilization, which increases costs for implementing the known method. In addition, excess hydrosulfite sodium helps to wash away mucopolysaccharides of the skin and leads to the destruction of the collagen structure, included in the TCI furs a: soaking off is carried out in an aqueous solution containing salt, OP, silicofluoride sodium or potassium and the enzyme preparation (A. C. the USSR 549474, CL IPC 14 With 1/04, publ. 1977).

The disadvantage of this method is that used as an antiseptic sodium silicofluoride refers to the number of toxic substances, it litters wastewater tanneries, and therefore additional measures are necessary to prevent pollution. In addition, silicofluoride sodium causes the screed leather and in addition it is not effective against mold, resulting in the process of storage is the mould of raw materials and reduces its quality. Known dual way of soaking in a solution containing 1 liter of water 20 g of sodium chloride. A: soaking off spend 10 hours at a temperature of 20o(Purim J. A. Technology of manufacture of fur and sheepskin raw material. - M: Light and food industry, 1983. - 37 S.).

However, the sodium chloride contributes to the dehydration of the leather, resulting in lost its plasticity and there is a negative effect greatest" that dramatically reduces the quality of fur raw materials.

The objective of the invention is improving the quality povinnogo fur raw material by treatment in an aqueous antiseptic solution as an antiseptic use an aqueous solution Manchurian walnut in the ratio of 9.0 to 20.0 g/L.

Experiments have shown that the use of an aqueous solution Manchurian walnut when: soaking off leads to a sharp decrease in the number of germs and bacteria spores in fur raw materials, and also leads to the complete destruction of spores of mould and yeast (see table 1). This eliminates the putrefactive processes in the leather, thereby to ensure its integrity and strength, and also to eliminate teclast hairline, and consequently, to improve the quality and increase the shelf life of fur raw materials.

Also contained in the Manchurian walnut tannins and vegetable tanning substances contribute to the stabilization of collagen leather, which also ensures its durability and enhances the quality of fur raw materials.

Because Manchurian walnut is a natural vegetable raw material, its water solution has a beneficial effect on the leather, it is soft, plastic, hair is strengthened and becomes light Shine.

The claimed method of soaking is environmentally friendly, does not contaminate the waste water, and an aqueous solution Manchurian walnut is relatively inexpensive antiseptic, providing high-quality processing of fur the quality of 9.0 to 20.0 g/L.

The claimed significant parameters and deviation from them can not solve the problem.

So, if in aqueous solution Manchurian walnut will be less than 9.0 g/l, it is not antiseptic effect is achieved, there are putrefactive processes in the leather, teclast hairline, decreases the strength of the leather.

The presence of Manchurian walnut in aqueous solution over 20,0 g/l does not bring tangible changes in the quality of fur raw materials and, therefore, increasing its concentration is above this impractical.

To implement the solution Manchurian walnut prepared as follows.

Take the leaves and pericarp Manchurian walnut at the stage of consumer maturity (by weight), crushed, pour room temperature water and insist for 20-24 hours. After infusion, the solution is filtered and used for a purpose.

Example 1 Take canned fur skins are loaded into the drum with a water solution Manchurian walnut, taken in the ratio of 9.0 g/l with a temperature of 25oC, and incubated for 18 hours, periodically rotating drum.

After the skins are removed from the drum, wring out and sent for further dressing.

After almalki - 36,2 MPa, rabbit - 19,8 MPa; tensile strength of hair: mink - 68,4 SN, proteins 48,7 SN, rabbit - 25,4 CH. Bacterial count per 1 g of the sample is 2.0103pieces, bacteria - 0,5, spores, moulds and yeasts were not detected.

Example 2 Take canned fur skins are loaded into the drum with a water solution Manchurian walnut, taken in the ratio of 10.0 g/l with a temperature of 25oC, and incubated for 18 hours. After the skins are removed from the drum, wring out and sent for further dressing.

After soaking the skins are soft the leather is. The tensile strength of the leather is: mink - 45,9 MPa, proteins 42,2 MPa, rabbit - 22.5 MPa; tensile strength of hair: mink - 74,5 SN, proteins 57,8 SN, rabbit - 27,6 CH. Bacterial count per 1 g of the sample is 2.0103eggs, spores, bacteria, moulds and yeasts were not detected.

Example 3 Take canned fur skins are loaded into the drum with a water solution Manchurian walnut, taken in the ratio of 13.0 g/l with a temperature of 25oC, and incubated for 18 hours. After the skins are removed from the drum, wring out and sent for further dressing.

After soaking the skins are soft what is of 21.9 MPa; tensile strength of hair: mink - 73,9 SN, proteins 57,0 SN, rabbit and 26.9 CH. Bacterial count per 1 g of the sample is 2.0103eggs, spores, bacteria, moulds and yeasts were not detected.

Examples 4-5 carried out analogously to example 1, changing only the concentration of an aqueous solution Manchurian walnut and time of soaking.

From table 1 it is evident that the use of an aqueous solution Manchurian walnut almost completely isolates fur raw materials from mold spores, bacteria and yeast in contrast to known where they are present in significant quantities, while microbial number, respectively, by 3 orders of magnitude lower than in the known. This allows us to conclude that an aqueous solution Manchurian walnut is a good antiseptic for soaking fur raw materials, which not only improves quality, but also increase its shelf life.

The data in table 2 show that the physico-mechanical parameters of fur raw materials after soaking the claimed technical solution is also higher than the same figures after soaking raw materials by a known method, therefore, the quality of fur raw materials above.

Thus, the claimed ability, which is environmentally friendly, what is important for the preservation of the environment in the production of fur products.

Claims

The method of soaking fur raw materials by processing it in an aqueous antiseptic solution, characterized in that as an antiseptic take aqueous solution Manchurian walnut in the ratio of 9.0 to 20.0 g/L.

 

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