Method of finishing leather clothing

 

(57) Abstract:

The invention relates to the leather industry and can be used in the formulation of apparel of leather from the hides of cattle. Method of finishing includes operations: drying, double its Taiko, drying of the skin with stretch on the frame of the dryer, grinding the front surface of the skin, applying a layer of non-pigmented soil, the preliminary pressing of the skin, twice application of an aqueous solution of shellac on the skin with an intermediate pressing, pinning skin, more pressing, the breakdown of the skin in the drum, additional drying it with a banner on the frame of the dryer, causing the aqueous solution to the skin of the neck is additive and its final pressing. The method allows to increase the quality and broaden the range of apparel of leather from the hides of cattle. table 1.

The invention relates to the leather industry and can be used in the formulation of apparel of leather from the skins of cattle.

There is a method of finishing of apparel of leather from goat, including drying, aging for at least 24 h, humidity, and aging within 12-24 h, a breakdown in the drum, Taiko, the hides are in a period of 4-5 hours, drying with a streamer on runnage soil and coating paint pinning and pressing (Handbook of Tanner. Finish. Production control. Ed. Babirovoy N. - M.: Legprombytizdat, 1987, S. 30, 31, 85, 86).

The disadvantage of this method is that it does not allow to obtain high quality clothing the leather from the hides of cattle.

The closest analogue of the proposed technical solution is the way of finishing garment leather from the skins of cattle, including drying, double Taiko, breakdown of the skin in the drum within 6-8 hours, drying with a banner on the dryer frame, applying a layer of coating paint consolidation, a subdivision of the skin for 4-6 h and drying with a banner on the frame of the dryer and pressing (RU, patent 2039833 C1, CL 14 With 13/00, 11/00, 20.07.95).

The disadvantage of this method is that it does not allow you to get clothes skin with high strength properties and spectacular, beautiful appearance.

The technical result of the invention is to improve the quality and expand the range of apparel of leather from the skins of cattle.

This result is achieved by a method for finishing clothing of leather, namely, that the skin is dry, provide it dugu drying with a banner on the frame of the dryer and pressing, after drying the skin by stretching it on a frame of the dryer additionally produce grinding the front surface of the skin, applying a layer of non-pigmented soil, carry out a preliminary pressing and double application of an aqueous solution of shellac on the skin with intermediate its pressing, after fixing the skin is subjected to more pressing, followed by a breakdown of the skin in the drum, and after further drying of the skin by stretching it on the dryer frame is applied to the skin aqueous solution vulture-additives and finally pressed.

A distinctive feature of the proposed method is that holding after drying with a banner on the frame of the dryer additional grinding of the facial skin surface, applying a layer of non-pigmented primer, pre-pressing and double coating of an aqueous solution of shellac with intermediate pressing, more pressing after fixing skin, further dividing it into the drum, applying an aqueous solution vulture-supplements after additional drying with a streamer allows you to get clothes skin with improved performance properties and beautiful appearance.

Ways the rich cattle, subjected to drying in a vacuum dryer, two taike, drying with a banner on the dryer frame and the grinding of the front surface. Then on skin put a layer of non-pigmented soil, conduct preliminary pressing, twice with intermediate pressing is applied an aqueous solution of shellac. The composition of the shellac solution, wt.h.: shellac - 100, water (temp. 70oC) - 400, sodium bicarbonate - 7. The mixture is boiled to dissolve the shellac with constant stirring, cooled, allowed to settle and the top is removed the resulting wax. After this skin fix, put increased pressure, the breakdown in the drum for 2-48 h, drying and stretching on the frame of the dryer. Then on the skin caused aqueous solution vulture-additives and finally pressed.

Example 1. Leather obtained by standard methods from dairy calf skin, is subjected to drying in a vacuum dryer, two taike, drying and stretching on a frame drying and grinding the front surface. Then on skin put a layer of non-pigmented primer of the following composition, wt.h.: polyurethane dispersion EN 3989 - 100, water 100, subjected to preliminary pressing and twice with intermediate pressing is applied an aqueous solution of shellac. After this skin Zack is th dryer. Then on the skin caused aqueous solution vulture-additive of the following composition, wt.h.: Optimal NW - 200, water - 1000 and finally pressed.

Example 2. The leather obtained according to standard methods of virostko, treated as in example 1, but after grinding the front surface they put a layer of non-pigmented primer of the following composition, wt.h.: the variance of BMP-3 - 350, penetrator - 50, water - 600, and after additional drying and stretch marks on the frame of the dryer they are an aqueous solution vulture-additive of the following composition, wt.h.: EC-6052 - 200, water - 1000.

Example 3. The leather obtained according to standard methods of virostko, treated as in example 1, but after grinding the front surface they put a layer of non-pigmented primer of the following composition, wt.h.: polyurethane dispersion Sort PUR VI 010 - 300, wax emulsion WAX PP - 80, water - 600, and after additional drying and stretch marks on the frame of the dryer they are an aqueous solution vulture-additive of the following composition, wt.h.: Optimal MS - 200, water - 1000. Quality indicators received clothing of leather in comparison with the skin of the prototype presented in the table.

Using the proposed method allows you to obtain clothes leather fashion range type "cu is finishing garment leather, namely, that the skin is dry, provide it twice Taiko, a breakdown in the drum, drying it with a banner on the dryer frame, fixing skin, additional drying with a banner on the frame of the dryer and pressing, characterized in that after drying the skin by stretching it on a frame of the dryer additionally produce grinding the front surface of the skin, applying a layer of non-pigmented soil, carry out a preliminary pressing and double application of an aqueous solution of shellac on the skin with intermediate its pressing, after fixing the skin is subjected to more pressing, followed by a breakdown of the skin in the drum, and after further drying of the skin by stretching it on the dryer frame is applied to the skin aqueous solution vulture-additives and finally pressed.

 

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FIELD: leather industry.

SUBSTANCE: semifinished product is degreased, neutralized, dyed, and lubricated. Dyeing is performed in two washing-interrupted steps with anionic black dye consumed in amount 0.5-0.6% of the weight of semifinished product in each dyeing step. Lubrication is followed by retannage with chrome tanner in amount 0.6-1.0% of the weight of semifinished product (calculated for chromium oxide) and treatment with 0.8-1.0% of spindle oil.

EFFECT: achieved deep black color and high performance characteristics.

1 tbl, 5 ex

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