SU1511278A1 - Method of treating sheep hides - Google Patents

Abstract

The invention relates to the fur industry and allows to improve the quality and yield of the fur semi-finished product area. Fur sheepskins of a wet-salted method of preservation are subjected to soaking, spinning by hair, first degreasing, pressing, gouging of hair and furrowing. Then, the second degreasing is carried out, combined with pickling, for 4-6 h at LC = 7 and a temperature of 38-40 ° C with an aqueous composition containing, g / l: sulfuric acid 1.2-1.5

acetic acid 2.0-3.0

sodium chloride 35.0-45.0 and a fatty emulsion based on propylene glycol ether in mixtures of natural naphthenic and synthetic fatty acids of the C ₇ -C ₉ fraction 4.5-5.5. After that, the bedding is carried out for 4-24 h and tanning is fattening for 4-8 h at LC = 7 and a temperature of 38-40 ° C with an aqueous composition containing, g / l: sodium chloride 35.0-45.0

chromium dubbing compounds in terms of MF ₂ O _{3 of} 1.3-2.0 and a fatty emulsion based on propylene glycol ether in mixtures of natural naphthenic and synthetic fatty acids of the C ₇ -C ₉ 2.0-3.0 fraction. This is followed by bedding, drying and subsequent finishing. 2 hp f-ly, 2 tab.

Description

to vj

CX)

The invention relates to the fur industry and can be used for treating fur sheepskins.

The purpose of the invention is to improve the quality and yield of the fur semifinished area.

The essence of the invention is that the second degreasing is combined with pickling, while in

As a surfactant, a fatty emulsion is used based on propylene glycol ether mixtures of natural naphthenic and synthetic fatty acids of the general formula RCOOR OOCR, where R is the alicyclic radical of naphthenic acids and the aliphatic radical of synthetic fatty acids of the C -, - Cd fraction, and R is the corresponding 31151

exists -CHj-CH- or -CH-CH-O-CH - CH, CH, CH, ROE, and the process is carried out for k-LCD 6 hours at 7 and a temperature of an aqueous composition containing the following components in g / L;

Sulfuric acid 1.2-1.5 Acetic acid 2.0-3.0 Sodium chloride Fatting propylene glycol ether emulsion based on mixtures of natural naphthenic and synthetic fatty acids fractions

C -, - C.

, 5-5,5

Then they lay for 2 hours and then tanning and fattening for -8 hours at the LCD 7, the temperature with an aqueous composition containing the following components, g / l:

Sodium chloride 35- + 5

Oak joints

chromium (in terms of

on Cr-jOj) 1.3-2.0

Fatting emulsion on

based on propylene glycol ether mixtures

natural naphthenic

and synthetic fatty acid fraction

C-Cd2.0-3.0

The fatting emulsion based on propylene glycol ether contains the following components, in May: propylene glycol ether mixtures of natural naphthenic and synthetic fatty acids 58-62; ammonia (100) 0.1 | -0.16; formaldehyde (100%) 0.20-0.25; surfactant 4,6-, 8 water the rest. The emulsion is prepared in accordance with the method of preparation of the fat emulsion (One method of processing fur sheepskins. M .: TsNIITEElegprom, 1978, p.IZ)

Example. Half-fine wool sheepskins of a wet-salted preservation method are subjected to washing, spinning hair, first degreasing, spinning, shearing hair, shredding, after which the second degreasing combined with pickling at LCD 7, temperature, g / l: sulfuric acid is carried out 1.2; acetic acid 2; sodium chloride 35; propylene based fatty emulsion278 i

glycol ether t, 5, per i ian After being laid in tb; tanning is carried out for 4 hours with and with LC 7 with a composition comprising, g / l: sodium chloride 35; chromium oak compounds (in terms of) 1.3; emulsion of propylene glycol ether 2, and continue tanning in accordance with the method of a known method. Next, dyeing, drying and finishing sheepskins.

PRI mme R 2. Half-fine fur sheepskin dry-salted method

5, the preservation is treated analogously to Example 1. The concentration of the substance of the pickling solution, respectively, is equal to, g / l: sulfuric acid 1.35; acetic acid 2.5; sodium chloride

0 0; a fatty emulsion based on propylene glycol ether 5. The treatment is carried out for 5 hours. The lining after pickling is I t h. The tanning is carried out for 6 hours with a composition, g / l: sodium chloride 40; chromium oak compounds (in terms of) 1, b5; propylene glycol ether based fatty emulsion 2.5.

30 example. Semi-fine fur sheepskins of a wet-salted preservation method are treated analogously to example 1, The concentration of substances of the pickling solution, g / l: sulfur

eg acid 1.5; acetic acid 3; sodium chloride 5; fatty acid emulsion based on propylene glycol ether 5.5. Processing is carried out for 6 hours. Laying down after pickling raan

40 24 h. Tanning is carried out.

composition, g / l: sodium chloride 5; chromium coupling compounds (in terms of) 2 and fatty emulsion based on propylene glycol ether 3, dc for 8 hours

Examples k and 5 (control). The semi-fine fur fur coat of the wet-salted preservation method is treated as in Example 1, only the processing parameters are beyond the boundary values of the optimal mode of the proposed method (Table 1).

The treatment parameters for the proposed method are given in table. one.

50

55

The results of processing sheepskins according to examples 1-5 and by a known method are given in table. 2

As a result of the tests carried out, it was established that the application of the proposed method of processing sheepskins in comparison with the known method allows to increase the grade indicator, the yield of sheepskins area, improve the plastic and strength properties of the semi-finished product produced.

Claims (3)

1. Method of treating fur sheepskins, which includes washing, degreasing the first, degreasing the second using a surfactant, pickling with an aqueous solution containing sodium chloride, sulfuric and acetic acid, tanning using grease sodium, tanning compounds of chromium and a fatting emulsion , laying, drying and subsequent finishing, characterized in that, in order to improve the quality and yield of the area of the fur semifinished product, the second degreasing is combined with pickling, while as a surface -active substance used zhiruyuschuyu emulsion based on propylene glycol ether mixtures of natural and synthetic naphthenic fatty acid fraction C7-Sd, and the process is carried out for 6 h k-aqueous composition containing said components in the following amounts, g / l: Sulfuric Acid Acetic Acid Sodium Chloride Fatting emulsion based on propylene glycol ether mixtures of natural naphthenic and synthetic fatty acids fractions C, .5 10 layings are carried out for –2k cce and before tanning, and during tanning, an emulsion based on propylene glycol ether mixtures of natural naphthenic and synthetic fatty acids fractions in the amount of 2.0–3 is used as a fat emulsion. , 0 g / l. 2, Method POP.1, characterized in that tanning-fatting is carried out for-h with an aqueous composition containing these components in the following amounts, g / l: Sodium chloride 35,, 0 25 Oak compounds chromium (in terms of) 1.3-2.0 Fatting emulsion on based on propylene-30 glycol ether mixtures of natural. naphthenic and synthetic fatty acid fraction 35 С, -С 92.0-3.0 3. Method 1 and 2, the difference is that the degreasing-pickling and tanning is carried out at LC 7 and 40 38-40 ° C. Table 1 1.2-1.5 2.0-3.0 33.0-45.0 Time h pickling - bed degreasing tanning -weaving Composition of pickling liquid, g / l sulfuric acid acetic acid five U 6 6 2k 8 3 2 2 .7 36 ten 1.35 2.5 1.5 3.0 1.0 1.5 1.7 3.5 weld Ik 76 Continued table 2 77 76.3 71 78