RU2312898C1 - Fur sheepskin processing procedure - Google Patents

Abstract

FIELD: fur industry.

SUBSTANCE: invention is directed to processing fur sheepskin intended for manufacturing clothing, headgears, footwear parts and other fur items. Crude fur sheepskin of all preservation types is subjected to soaking, first degreasing, squeezing, haircutting, and fleshing according to known technology. Then fur sheepskin is subjected to additional processing in aqueous solution of sodium chloride (15-20 g/L) and nonionic surfactant composition (1-2 g.L) for 2-6 h at 30-32°C. After second degreasing and washing, pickle salting is carried out for 20-24 h. 4-6 hours after the beginning of pickle salting, processing solution is supplemented by 3-5 g composition of nonionic surfactants (1:1 mixture of Neonol AF 9-12 and syntamide 5). Finally tanning and greasing are performed.

EFFECT: improved performance characteristics fur sheepskin intermediate product.

2 cl, 1 tbl, 5 ex

Description

The invention relates to the fur industry and can be used in the processing of fur sheepskin intended for the manufacture of clothing, hats, details of shoes and other articles of fur.

A known method of processing fur sheepskin, including soaking raw materials, minkering, pickling in the presence of organic acid and sodium chloride and tanning. In this case, soaking and / or pickling is carried out in a solution of a modified biopolymer dispersion containing an azeotropic mixture of a 1 M aqueous solution of carboxylic acid and furfural as a dispersion medium, and a collagen-containing material as a dispersed phase (RU 2160782 C1, class C14C 1/04, 1/08, 12/20/2000).

The disadvantage of this method is that the low welding temperature (72-75 ° C) of the skin tissue of the obtained semi-finished product does not allow to obtain a fur sheepskin with high strength properties.

The closest analogue of the proposed technical solution is a method for processing fur sheepskin, including soaking raw materials, the first degreasing, shearing, coiling, second degreasing, pickling-fattening for 6-8 hours with an aqueous composition containing, g / l: sodium chloride - 40.0 , acetic acid - 3.0, sulfuric acid - 1.5, industrial oil I-12A - 5.0 and nonionic surfactant - 0.5, and tanning-fatliquoring (Technology for processing fur sheepskins. - M .: TSNIITEIlegprom, 1988. - S.8-17).

The disadvantage of this method is the incomplete removal of ballast substances from the skin tissue of a sheepskin (globular proteins, fatty inclusions, mucopolysaccharides), which complicates the process and leads to a deterioration in the operational properties of the semi-finished fur product.

The technical result of the invention is to increase the operational properties of the finished product.

This result is achieved by the fact that in the method of processing fur sheepskin, including soaking raw materials, first degreasing, shearing, coiling, second degreasing, pickling and tanning, after curing, additional processing of the raw material in an aqueous solution of sodium chloride and nonionic surfactant composition in an amount of 15 -20 g / l and 1-2 g / l, respectively, for 2-6 hours at a temperature of 30-32 ° C, and pickling is carried out in the presence of a nonionic surfactant composition, which is administered in an amount of 3-5 g / l after 4-6 h after the start of picking. In this case, as a composition of nonionic surfactants, a mixture of neonol AF 9-12 and syntamide 5 is used in a ratio of 1: 1.

Neonol AF 9-12 is a mixture of polyethylene glycol ethers of monoalkylphenols. Syntamide 5 is a mixture of polyoxyethylated esters of monoethanolamides of synthetic fatty acids of fraction C ₁₀ -C ₁₆ .

Other surfactants that have found application in the fur industry can also be used as nonionic surfactants. For example, a mixture of prevocell and syntanol (1: 1), sinterol and gelon (1: 1), etc., but the preferred form of execution is to use a mixture of neonol AF 9-12 and syntamide 5 in a 1: 1 ratio.

A distinctive feature of the proposed method is that the additional processing of raw materials with an aqueous solution of sodium chloride and a nonionic surfactant composition after meninges, as well as pickling in the presence of a nonionic surfactant composition, allows the most complete removal of ballast substances from the skin of the sheepskin fabric, which facilitates technological processes and gives an opportunity to increase operational properties of a fur semi-finished product.

Performing additional processing of fur sheepskin at a sodium chloride consumption of less than 15 g / l, surfactant composition less than 1 g / l at a temperature below 30 ° C for less than 2 hours, and pickling at a surfactant composition consumption less than 3 g / l for less than 20 hours does not significantly improve the quality of the semi-finished product. Additional processing and pickling at reagent costs above the stated limits can lead to fluidity of the hairline.

The technology of the method is as follows.

Raw fur sheepskin of all preservation methods is subjected to soaking, first degreasing, wringing, shearing and haircut using known technology. After starving, additional processing of the raw material is carried out in an aqueous solution of sodium chloride at a flow rate of 15-20 g / l and a composition of nonionic surfactants in an amount of 1-2 g / l for 2-6 hours at a temperature of 30-32 ° C. After the second degreasing and washing, pickling is carried out by known methods for 20-24 hours, but 4-6 hours after the start of pickling, 3-5 g / l of nonionic surfactant composition is introduced into the treatment solution. As a surfactant composition, a mixture of neonol AF 9-12 and syntamide 5 in a ratio of 1: 1 is used. Tanning-fatliquoring and subsequent processes and operations are carried out according to known technology.

Example 1. The raw material of a fur sheepskin is subjected to soaking, first degreasing, wringing, shearing and mesentery. After this, additional processing of the raw materials in an aqueous solution of sodium chloride in an amount of 15 g / l and a mixture of neonol AF 9-12 and syntamide 5 in a ratio of 1: 1 at a flow rate of 1 g / l for 6 hours at a temperature of 30 ° C is carried out.

After the second degreasing and washing, the semi-finished product is pickled with an aqueous solution of sodium chloride - 40 g / l and a mixture of sulfuric - 1.5 g / l and acetic - 3 g / l of acid for 20 hours, and 4 hours after the start of pickling in the processing the solution is injected with 3 g / l of a mixture of neonol AF 9-12 and syntamide 5 in a 1: 1 ratio.

Tanning and subsequent processes and operations are carried out according to known technology.

Example 2. Raw fur sheepskin is treated as in example 1, but additional processing is carried out at a flow rate of sodium chloride 17 g / l and a flow rate of a mixture of neonol AF 9-12 and syntamide 5 (1: 1) 1.5 g / l for 4 h at a temperature of 31 ° C, and pickling is carried out for 22 hours in the presence of a mixture of the same surfactants in an amount of 4 g / l, which is introduced into the processing solution 5 hours after the start of pickling.

Example 3. Raw fur sheepskin is treated as in example 1, but additional processing is carried out at a flow rate of sodium chloride 20 g / l and a mixture of neonol AF 9-12 and syntamide 5 (1: 1) 2 g / l for 2 hours at a temperature 32 ° C, and pickling is carried out for 24 hours in the presence of the same surfactant mixture at a flow rate of 5 g / l, which is introduced into the treatment solution 6 hours after the start of pickling.

Example 4. Raw fur sheepskin is treated as in example 1, but additional processing is carried out at a flow rate of sodium chloride 14 g / l and a mixture of neonol AF 9-12 and syntamide 5 (1: 1) 0.5 g / l for 6, 5 hours at a temperature of 33 ° C, and pickling is carried out for 19 hours in the presence of a mixture of the same surfactants in an amount of 2.5 g / l, which is introduced into the processing solution 3.5 hours after the start of pickling.

Example 5. Raw fur sheepskin is treated as in example 1, but additional processing is carried out at a flow rate of sodium chloride 21 g / l of a mixture of neonol AF 9-12 and syntamide 5 (1: 1) 2.5 g / l for 1.5 h at a temperature of 28 ° C, and pickling is carried out for 24.5 hours in the presence of a mixture of the same surfactants in an amount of 5.5 g / l, which is introduced into the processing solution 6.5 hours after the start of pickling.

Quality indicators of the obtained semi-finished fur product in comparison with the semi-finished product of the prototype are presented in the table.

Using the proposed method can improve the operational properties of the finished semi-finished product from fur sheepskin.

Table Indicators Examples Prototype one 2 3 four 5 The plasticity of the leather fabric of the finished semi-finished product,% 34.1 35,4 36.6 30.6 36.8 23.9 The elastic modulus of the skin tissue, MPa 6.4 5.8 4.8 6.6 4.9 7.6 Porosity,% 63.1 63.6 64,2 60.1 65.0 58.4 Welding temperature, ° С 82 83 84 80 84 78 Reducing the weight of one semi-finished dm ^2% 9.02 10.38 11.3 8.15 11.45 -

Claims (2)

1. The method of processing fur sheepskin, including soaking raw materials, the first degreasing, shearing, coiling, the second degreasing, pickling and tanning-fattening, characterized in that after curing, additional processing of the raw material in an aqueous solution of sodium chloride and nonionic surfactant composition in an amount of 15- 20 and 1-2 g / l, respectively, for 2-6 hours at a temperature of 30-32 ° C, and pickling is carried out in the presence of a nonionic surfactant composition, which is introduced in an amount of 3-5 g / l 4-6 hours after the start of pickling . 2. The method according to claim 1, characterized in that as a composition of nonionic surfactants use a mixture of neonol AF 9-12 and syntamide 5 in a ratio of 1: 1.