Fur sheepskin processing procedure

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

 

The invention relates to the fur industry and can be used in the processing of fur, used for making clothes, hats, parts of shoes and other articles of fur.

A method of processing fur sheepskin, comprising : soaking off of raw materials, meskene, pickling in the presence of organic acids and sodium chloride and tanning. When : soaking off and/or pickling is carried out in a solution of the modified biopolymer dispersion containing as a dispersion medium azeotropic mixture of 1 M aqueous solution of carboxylic acid and furfural, as well as the dispersed phase - containing collagen material (EN 2160782 C1, CL SS 1/04, 1/08, 20.12.2000).

The disadvantage of this method is that the low temperature welding (72-75° (C) the leather of the obtained semi-finished product makes it possible to obtain a fur sheepskin with high strength properties.

The closest analogue of the proposed technical solution is the way to handle fur sheepskin, comprising : soaking off of raw materials, the first degreasing, haircut, meskene, the second degreasing, pickling-greasing within 6-8 h of aqueous composition containing, g/l: sodium chloride - 40,0, acetic acid and 3.0, sulfuric acid - 1,5, industrial oil AND 12A - 5.0 and nonionic surfactant is 0.5, and tanning-greasing (Technology processing and fur skins. - M.: Createrepo, 1988. - P.8-17).

The disadvantage of this method is the incomplete removal of ballast substances from the leather sheepskin (globular proteins, fatty inclusions, mucopolysaccharides), which hinders technological processes and leads to deterioration of performance properties of fur semi-finished product.

The technical result of the invention is to improve the operational properties of the finished semi-finished product.

This result is achieved by a method for processing fur sheepskin, comprising : soaking off of raw materials, the first degreasing, haircut, meskene, the second degreasing, pickling and tanning-greasing after meskene produce additional processing of the raw material in an aqueous solution of sodium chloride and the composition of the nonionic surfactant in the amount of 15-20 g/l and 1-2 g/l, respectively, within 2-6 hours at a temperature of 30-32°and pickling is carried out in the presence of the composition of nonionic surfactant, which is injected in the amount of 3-5 g/l after 4-6 h after the start of pickling. At the same time as the composition of nonionic surfactants, a mixture of neonols AF 9-12 and sintimid 5 in 1:1 ratio.

Neonol AF 9-12 is a mixture of polyethylene glycol ethers of monoalkylphenols. Sintimid 5 - a mixture of esters of monoethanolamide synthetic fatty acid fraction C10-C16

As nonionic surfactants can also be used in other surface-active substances, which have found application in the fur industry. For example, a mixture Prevotella and cintanya (1:1), sinterol and Helena (1:1) and so on, but a preferred form of execution is to use a mixture of neonols AF 9-12 and sintimid 5 in 1:1 ratio.

A distinctive feature of the proposed method is that additional processing of the raw material aqueous solution of sodium chloride and composition of nonionic surfactants after meskene, as well as the implementation of pickling in the presence of the composition of nonionic surfactants allow us to fully remove from the leather sheepskin ballast substance that facilitates the carrying out of technological processes and opportunities to improve operational properties of fur semi-finished product.

Carrying out additional processing of fur at the expense of sodium chloride is less than 15 g/l, surfactant composition is less than 1 g/l at a temperature below 30°With less than 2 hours, as well as the implementation of pickling at a flow rate of the surfactant composition is less than 3 g/l in less than 20 hours is not possible to significantly improve the quality of the semifinished product. Additional processing and pickling at a cost of reagents above stated limits may cause teclast hairline.

Technology way, the conclusion is as follows.

Raw fur all methods of canning are : soaking off, the first degreasing, pressing, cutting and mendrinou by known techniques. After meskene produce additional processing of the raw material in an aqueous solution of sodium chloride at a flow rate of 15-20 g/l and the composition of the nonionic surfactant in the amount of 1-2 g/l within 2-6 hours at a temperature of 30-32°C. After the second degreasing and washing carry out pickling by known methods for 20-24 h, but after 4-6 hours after the start of pickling in the processing solution is injected 3-5 g/l of the composition of nonionic surfactants. As the surfactant composition, a mixture of neonols AF 9-12 and sintimid 5 in 1:1 ratio. Tanning-greasing and subsequent processes and operations are performed by known techniques.

Example 1. Raw fur sheepskin are : soaking off, the first degreasing, pressing, cutting and mendrinou. Then produce additional processing of the raw material in an aqueous solution of sodium chloride in an amount of 15 g/l and a mixture of neonols AF 9-12 and sintimid 5 in the ratio of 1:1 at a flow rate of the composition 1 g/l for 6 h at a temperature of 30°C.

After the second degreasing and washing carry out pickling semi-finished product with an aqueous solution of sodium chloride and 40 g/l and a mixture of sulfuric - 1.5 g/l and acetic acid 3 g/l acid for 20 h, while after 4 h after the start of pickling in store is the overall solution is injected 3 g/l of a mixture of neonols AF 9-12 and sintimid 5 in 1:1 ratio.

Tanning-greasing and subsequent processes and operations carried out by known techniques.

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

Example 3. Raw fur sheepskin are 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 neonols AF 9-12 and sintimid 5 (1:1) 2 g/l for 2 h at a temperature of 32°and pickling is carried out for 24 h in the presence of this surfactant mixture at a flow rate of the composition 5 g/l, which is introduced into the processing solution through 6 h after the start of pickling.

Example 4. Raw fur sheepskin are treated, as in example 1, but additional processing is carried out at a flow rate of chloride of sodium, 14 g/l and a mixture of neonols AF 9-12 and sintimid 5(1:1) 0.5 g/l for 6.5 h at a temperature of 33°and pickling is carried out for 19 h in the presence of a mixture of these surfactants in a quantity of 2.5 g/l, which is introduced into the processing solution after 3.5 h after the start of pickling.

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

Qualitative indicators fur semi-finished product obtained in comparison with the intermediate product on the prototype presented in the table.

Using the proposed method improves the performance properties of the finished semi-finished fur sheepskin.

Table
IndicatorsExamplesThe placeholder
12345
The plasticity of the leather ready-made cake mix, %34,135,436,630,636,823,9
The modulus of elasticity of the leather, MPa6,45,84,86,6a 4.97,6
Porosity, %63,163,664,260,165,0 58,4
Temperature welding, °828384808478
The reduction of weight of 1 DM2ready-made cake mix, %9,0210,3811,38,15of 11.45-

1. The method of processing fur sheepskin, comprising : soaking off of raw materials, the first degreasing, haircut, meskene, the second degreasing, pickling and tanning-greasing, characterized in that after meskene produce additional processing of the raw material in an aqueous solution of sodium chloride and the composition of the nonionic surfactant in the amount of 15-20 and 1-2 g/l, respectively, within 2-6 hours at a temperature of 30-32°and pickling is carried out in the presence of the composition of nonionic surfactant, which is injected in the amount of 3-5 g/l after 4-6 h after the start of pickling.

2. The method according to claim 1, characterized in that the composition of nonionic surfactants, a mixture of neonols AF 9-12 and sintimid 5 in 1:1 ratio.



 

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1 tbl, 1 ex

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2 tbl, 2 ex

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1 tbl, 2 ex

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