SU142377A1 - Method for tanning soft chrome leather - Google Patents

Description

Usually, tanning of soft chrome leathers is carried out in batches in a solution of chromium salts with preliminary pickling or salt bending. In the case of the chrome-emulsified method of tanning, the hide also pre-undergoes a special treatment with a fat emulsion.

The described method of tanning soft chrome leather, in contrast to the known, reduces the duration of the production process, improves productivity and improves the conditions of the workplace. This is achieved by picking off the process, and the treatment is performed in a solution of chromium salts with a basicity of 8-lOIo (according to the Scherlemera) with a chromium oxide content of 5-10 g / l for 15–30 min for goats and sheepskin lovoy group- 40-60 lshn. Next, a chromium solution with a basicity of 48–50% with a chromium oxide content of 100 g / l is applied to the bachtorm surface of the semi-finished product with a sprayer, after which the leather is dipped in cold water for 2–3 sec.

According to the proposed method, all production processes prior to pickling are carried out according to standard procedures. Then the hide is treated in a solution of chromic salts with a basicity of 8-10% and a chromium oxide content of 5-10 g / l. The duration of treatment for sheepskin and goats is 15-30. Of the lake, and for the left group, the mole is 40-60 minutes.

The hide, brought in this way to an acidic state, is further subjected to single-piece tanning, in particular, in a tanning apparatus. On the surface of the tanning apparatus, the upright is spread up bahtormy and a solution of chromium salt with a basicity of 48-50% and a chromium oxide content of 100 g / l is applied to it using a sprayer. For a better penetration and more uniform distribution of chromium salts in the skin dermis, the semi-finished product is lowered into cold water for 2-3 seconds and

No. 142377-- 2 -

placed face down to each other on mobile goats. All further operations and finishing processes are carried out according to standard procedures for the production of soft chrome leather.

According to the conclusion of the Economic Council of the Armenian SSR, the experimental work carried out showed; The introduction of a piece processing of tanning and fattening of leather will make it possible to: mechanize and automate the processes of tanning and fattening, significantly improve the quality of leather goods, improve the working conditions of workers and free up production areas.

Subject invention

The method of dubbing soft chrome leathers, characterized in that, in order to shorten the processing time, improve working conditions and increase productivity, the process of pickling is eliminated, and the treatment of the mole is made in a solution of chromium salts with a basicity of 8-10% 5-10 g1l of chromium oxide, 15-30 minutes for sheepskin and goats, 40-60 minutes for the group, then a chromic solution with a basicity of 48-50% with chromium oxide content of 100 g1l is applied to the surface of the spray spray, after which zvodits leathers dipping into cold water for 2-3 seconds.