SU1615182A1 - Method of producing white and off-white leather - Google Patents

Abstract

The invention relates to the leather industry and makes it possible to simplify the process and improve the quality of leather. In the production of leather as a fattening agent and bleach, a mixture of triethanolamine salts of alkylamidophosphates is used based on primary fatty alcohols of the C ₁₀ –C ₁₈ fraction and monoethanolamides of the C ₁₀ –C ₁₆ fraction in the amount of 8% by weight of sliced leather. 1 tab.

Description

The invention relates to the leather industry, in particular to. post-treatment leather processing.

The purpose of the invention is to simplify the method and improve the quality of leather.

The essence of the method lies in the fact that during leather processing of leather, a mixture of triethanolamine salts of alkylamidophosphates based on primary fatty alcohols of the fraction and monoethanolamides of the C o-Ci6 fraction (preparation FOCEMS-6) is used as a fattening agent and bleach.

Fosems-6 is a mase-like mass from yellow to brown, J

the hydrogen index is 6.5-8.5, the mass fraction of substances is at least 95%.

Example 1. The treatment of tanned semi-finished product to obtain white, skin-free leather from high-purity is carried out to the following technological scheme: washing neutralization; washing: LCD 1.2, temperature 60 ° С, FOCEMS-6, 8% by weight of planed leather, processing time 1.5 h, washing.

Further processing is carried out according to a standard procedure.

Example 2. Processing tanned semi-finished product to obtain a wasp

00 ts9

Drifting leather for loose-wear shoes from the light one is carried out according to the following scheme: washing; neutralization, penetration {greasing: LCD 1.1, temperature, PHSEMS-6 8% of the mass of sliced Leather, processing time 1.5 hours, washing.

Further processing is carried out according to a standard procedure.

I Example 3. The treatment of dubeno-jro semi-finished product to obtain haberdashery clarified skin from porcine raw materials is carried out according to the scheme: washing

ka, degreasing, neutralization, washing, greasing: LC 1.0, temperature 60 ° C, consumption of FOSEMS-6 8% by weight of sliced leather, treatment time 1.5 4j washing.

Further processing is carried out according to a standard procedure.

The controls were skin, developed according to known methods, using titanium dioxide as a bleach.

Qualitative indicators of the leather obtained in the table.

The degree of lightness,% of the standard57,5

Strength at stretching, 10 MPa1.9. Extension at tension 10 MPa,% 38.6

The stress at the occurrence of cracks in the front layer, Sh,

Coverage resistance to multiple bending, points Coating resistance to wet friction, turns

48.0

1.6

34.5

59.5

2.1

44.0

19.0

. four

200

52,8

52.1

45.3

1.8

1,3

1.2

34.1

38,731, 5

16.5

200

As can be seen from the data in the table, the use of the preparation FOSEMS-6 allows improving the quality characteristics of white and clarified skins both in degree of whiteness and in physical and mechanical properties. In all examples, skin produced without titanium dioxide is organoleptically painful. In addition, the use of FoSEMS-6 in the production of light-colored leathers, excluding the use of titanium dioxide, simplifies and reduces the cost of the process and also improves working conditions.

Claims (1)

Formula A method for producing white and light tones, including treating them with a fatting agent and bleach, characterized in that, in order to simplify the process of improving the quality of skins, a mixture of triethanolamine alkylamide phosphate salts based on primary fatty alcohols of fractions C is used as a fattening agent and bleach. (and monosanolamide fraction.