SU1082820A1 - Method for dressing skin for footwear upper - Google Patents

Description

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The invention relates to methods of chemical treating the mole and can be used to produce leather for the upper of the shoe.

A known method of treating a mole is that the dried tar is treated with an emulsion consisting of an acrylic emulsion, mineral oil, emulsifier and water, after which tanning is performed. The method of tanning-free tanning is based on the fact that the fat components of the emulsion shield the structural elements of the mole, which prevents them from intensive bonding of tanning chromium compounds and eliminates the tightness of the C13 face

The disadvantages of this method are the large laboriousness associated with the preparation of the emulsion, as well as the fact that the protection of the face layer with the emulsion against contraction is not always sufficient, for example, when tanning the sacking and outgrowth.

There is a known method of producing leather for the upper of the shoe, which includes softening the mole, pickling it by treating it with an opening glue containing salt and sulfuric acid, and subsequent tanning with chromium salts 2.

The purpose of the invention is to improve the quality of the skin by improving their performance properties, such as softness and density of the face layer.

This goal is achieved by the fact that according to the method of developing the skin for the top of the shoe by pickling the tan and tanning it with chromium compounds, the tar during the pickling and / or tanning process is additionally treated with sulfomethylated interaction product of oleic acid and diethylenetriamine in an amount of 1-1.5 % by weight of the mole.

This product, upon addition of highly emulsified, forms a finely dispersed emulsion, which has a masking effect and thereby allows the front surface to be quenched toed by fast binding to the tanning salts of chromium. This eliminates the possibility of the formation of a face tightening, contributes to obtaining a high-quality facial layer. The tanning agent is evenly distributed throughout the thickness of the dermis, which makes it possible to obtain soft, filled skin,

The proposed method uses the ability to disperse natural fat, which results in a more even distribution of coloring and fatty products in the skin. In addition, the coloring strength with direct dyes increases.

The sulfomethylated product of the interaction of oleic acid and diethylenetriga (dispersant) has the formula

С, Н СОН С2П ИС СН230зНа

CH-iSOgNa

Example .. Goll, obtained according to a standard procedure, after softening and washing, is treated with an emulsion

0 dispersant in an amount of 1.5% per 100% product for 15 minutes, then pour a pickled liquid consisting of 5.5% salt and 0.7% sulfuric acid

5 based on 100% product. The treatment is carried out for 25 minutes. Then, dubbing chromium compounds in an amount of 1.5% based on chromium oxide are poured. After 2.5 hours from the onset of tanning, a solution of sodium sulfide is poured.

 in three doses at intervals of 20 minutes. Sodium sulfite consumption is 0.8% by weight mole,

After 5 hours from the beginning of tanning, they check for bales. Then unload

5 semi-finished products for laying. Further, all processes and operations are carried out according to the approved technology, with the exception of the fattening process, where the consumption of fat is reduced to 3% of the planed

0 weight of semi-finished product

Example 2 After softening and i washing, the hide is treated with a pical liquid consisting of sodium chloride and sulfuric acid, similar to Example 1. After 1 minute, pour a dispersant emulsion, which is 1% by weight mole. The pickling process is continued for 45 minutes, after which it is poured

0 oak salts. Tanning is carried out analogously to example 1,

Further, all processes and operations are carried out according to the approved technology, with the exception of the fattening process,

where the fat consumption is reduced to 4% of the sliced weight of the semifinished product. Froze After softening and rinsing, pickling is carried out with a solution of boiled salt and sulfuric acid. After 50 min, a tanning solution of chromium salts in the amount of 1.5% per chromium oxide and dispersant emulsion in the amount of 1.5 per 100 product is poured onto the pickled liquid.

5 After 2 to 5 hours from the top of tanning, the sodium sulfite solution is poured in three steps at intervals of 20 minutes. Sodium sulfite consumption is 0.8% by weight mole,

0 After 5 h from the start of tanning

check for bales. Then the semi-finished product is unloaded on the bed,

Further, all processes and operations are carried out according to the approved technology.

5 with the exception of the fattening process.

where the consumption of fat is reduced to 3% of the planed mass of the semifinished product.

Example 4. Pourer after m g of 1 and rinsing is treated with an emulsion dispersant, the flow rate of which is 1% by weight of mole, for 15 minutes, then pical liquid is added, consisting of solutions of sodium chloride and sulfuric acid. It is treated for 25 minutes, then the tanning compounds of chromium are added in the amount of 1.5% based on chromium oxide and 0.5% of dispersant per 100% product.

After 2.5 hours from the onset of tanning, pour the sodium sulfite solution in three doses at intervals of 20 minutes. The consumption of sodium sulfite is

Table of physical and mechanical tests

0.8% by weight of the mole. After 5 hours from the onset of tanning, check for bales. Then unload the semi-finished product on the bed.

Further, all processes and operations are carried out according to the approved technology, with the exception of the fattening process, where the consumption of fat is reduced to 3% of the planed weight of the semi-finished product.

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As a result of all the examples, soft to the touch skin with a dense facial layer and improved performance properties were obtained that meet the requirements of GOST 938-75 and have the following physical and mechanical properties (see table).

4/4/3 4 4

3/2/3

4/4/4

3/3/4 4 4 4 3 2 3

Claims (1)

METHOD FOR PRODUCING LEATHER FOR TOP OF SHOES by pickling a tartar and tanning it with chromium compounds, characterized in that, in order to improve the quality of the skin, the tartan is additionally treated with a sulfomethylated product of the interaction of oleic acid and diethylenetriamine in an amount of 1 1, 5% of the mass of the goal. SU „„ 1082820