SU1293228A1 - Method for treating leather - Google Patents

Abstract

The invention relates to a method for producing leather and improves the quality of the leather by eliminating the aroma and increasing the strength of the face layer while reducing the duration of the production cycle. Cattle hides are soaked in the presence of sulfated OP-7 in the amount of 2-3 g / l. After desalting (before pickling) and after retanning (before neutralization), the semi-finished product is further treated with a solution of sulfated OP-7 with a concentration of 2-3 g / l for 20-30 minutes before pickling and for 30- 60 minutes before neutralization. 1 tab. a (L to; about with to to oo

Description

11293228

The invention relates to lightness, in particular to leather, and can be used in latching leathers.

The purpose of the invention is to improve the quality of the leather by eliminating the airflow and increasing the strength of the face layer while reducing the duration of the production cycle.

The essence of the invention is

5 2

W

in that according to the method of making leather, including winding, salting, dressing, pickling the semi-finished product, tanning, bending, neutralization, dyeing and finishing and finishing operations.

A mixture of ethoxylated mono and dialkylphenols —C „H,„ + + 1CbN O (C5H; 0) „H, where h is 8-10,

(sulfated OP-7) with a concentration of 8.5 hours, a concentration of sulfated SP 7–2 g / l, and a sodium carbonate consumption of 1.4–1.6% of the mass of CF. Golding, chilling, cutting, doubling, determination of the mass of the mole, washing are carried out according to the same method of producing chrome tanning leathers with a yield of 2-3 g / l, additionally, the skin is treated with a solution of sulphate-25 thickness and an assortment for the top OP-7 with concentration 2-3 g / l of the lining of shoes from large hides for 20-30 minutes before pickling and within 0.5-1.5 hours before neutralization.

At the same time, the duration of the processes: ash, pickling, tanning, dye-and-fat is 4-6 hours.

2 hours, 8–9 hours and 5–6 hours of respective cattle. The de-zolation is carried out at a fuel mix of 1.2-1.5, a temperature of 36-38 ° C, a duration of 50-60 minutes, consumption of ammonium sulfate 2.5-3.5% and phthalic anhydride 0.5-0.7% by weight of a mole. Then, the treatment is carried out with a solution of sulfated OP-7 at the LCD 2, a temperature of 40 ° C, with a duration of 0.25 h, a concentration of .35 sulfated OP-7 - 2 g / l. Hemp, pickling, tanning, prono.

Sequential treatments with a bifunctional surfactant (sulfated OP-7) allow to intensify and achieve an optimal degree of separation of the skin structure, resulting in Q a deeper, even and fast distribution of chemical materials throughout the thickness of the skin and each individual fiber. cattle. De-zolization is carried out at a fuel mix 1.2-1.5, a temperature of 36-38 ° C, a duration of 50-60 minutes, an ammonium sulfate consumption of 2.5-3.5% and phthalic anhydride 0.5-0.7% by weight of a mole . Then, the treatment is carried out with a solution of sulfated OP-7 at the LCD 2, a temperature of 40 ° C, with a duration of 0.25 h, a concentration of .35 sulfated OP-7 - 2 g / l. Sampling, pickling, tanning, laying, squeezing moisture, sorting, planing a semifinished product, determining the mass of skinned leather, retanning chromium salts and washing are carried out in the corresponding.

with this technique,

-. .. -.

After that, the processing is carried out

With a solution of sulfated OP-7, when mu is achieved, elimination of an air-blown-5 temperature of 40-45 ° C, continuation and reduction of the strength of the facial layer of the process for 0.3 h at a concentration of 2 g / l, further processes are carried out in accordance with the specified method .

Other examples of the implementation of the proposed method and indicators

skin while reducing overall. the duration of the production cycle.

The duration of the proposed method is (according to the prototype, 48.5 hours).

The preparation of sulfated OP-7 is carried out as follows.

Initially, the actual sulfiding is carried out at 30-35 ° C, the consumption of concentrated sulfuric acid 5% by weight of OP-75 sulfuric acid is introduced for 2 h with constant stirring. Then stand reaction50

the qualities of the leather obtained are given in the table.

55

Claims (1)

Invention Formula The method of making skin, including soothing, salting, desalting with a constant stirring for 2 hours at 30-35 ° C, then the sulfoproduct is neutralized with ammonia water (25% concentration) with constant stirring until pH 8-10, then the sulphate is washed with a 10% solution of cooking salt or water and stand for 24-48 hours at B-UO C, after which the separated layer of ammonium sulfate is drained. Example 1. Cattle hides are taken to make leather. The shake is carried out at the LCD (liquid coefficient) 1.3 -, the temperature is 20-22 ° C, the duration 8.5 h, the concentration of sulfated SP 7 - 2 g / l and the consumption of sodium carbonate 1.4-1.6% by weight of CF. Golding, chilling, trimming, doubling, determination of the mass of the mole, washing are carried out according to the same method of production of chrome tanned leather and thickness of the range for the upper lining of shoes from large skins   thickness and range for the upper lining of shoes from the skins of large cattle. De-zolization is carried out at a fuel mix 1.2-1.5, a temperature of 36-38 ° C, a duration of 50-60 minutes, an ammonium sulfate consumption of 2.5-3.5% and phthalic anhydride 0.5-0.7% by weight of a mole . Then, the treatment is carried out with a solution of sulfated OP-7 at the LCD 2, a temperature of 40 ° C, with a duration of 0.25 h, the concentration of sulfated OD-7 is 2 g / l. Hem, pickling, tanning, laying, squeezing moisture, sorting, stitching of the leather obtained are given in the table. 55 Invention Formula The method of making skin, including soothing, salting, desalting 312932284 pickling of semi-finished product, tanning, bricata with sulphated solution retanning, neutralization, edge-mixtures of ethoxylated mono- and disilo-fatty and finishing one-alkylphenols of the general formula walkie-talkie, about tl and h and y sch. and yen, ,,, 0 () „H, that, in order to improve the quality of leather 5 where and 8-10, by eliminating the odorlessness and re 6-7, Strength of the face layer with a concentration of 2-3 g / l for at the same time reducing the duration of 20-30 minutes before pickling and 30 production cycle, before the peak-60 minutes before neutralization, and peeling and neutralization carried out Omoku lead in the presence of the specified Additional processing of the semi-compound in the amount of 2-3 g / l. Processing parameters for winding: concentration, g / l before pickling concentration g / l time min before neutralization concentration, g / l time, min Indicators of properties: suffocation, points stiffness (PZHU) 9.8 n / a INSTRUCTION AT TREASON APPEARANCE, MPA elongation at a voltage of 9.8 MPa 2.5 2.5 2.5 2.5 2.5 2.5 20 25 30 2.5 2.5 2.5 thirty 45 60 20 25 30 45 20.0 18.9 4.3 3.9 -3.5 3.8 3.2 3.3 3.6 3.7 3 30 3 60 3, 39.5 40.1 14.0 13 12 13.8 13.6 13.6 12.9 t3.2 13.0 10.8 11.3 24.8 20 22.3 22.5 24.1. 23.9 24.2 23.9 24.0 25.2 25.8 34.7 37 36.1 35.1 35.8 36.2 36.0 35.4 36.2 Editor A. Dolinich Compiled by S. Likhachev Tehred M. Khodanich Proofreader M. Pojo Order 349/28 Circulation 374 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, st. Project, 4 2.5 2.5 2.5 2.5 2.5 25 30 2.5 2.5 45 60 20 25 30 45 3.2 3.3 3.6 3.7 3 30 3 60 3, 12 13.8 13.6 13.6 12.9 t3.2 13.0