The method of processing of fur raw materials

 

(57) Abstract:

The method relates to light industry and can be used for chemical treatment of the sheepskin and fur raw materials. Raw material is subjected to: soaking off, pickling in the presence of organic acids and sodium chloride and tanning. A: soaking off and/or pickling of fur raw materials 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. The proposed method reduces the length of the fluid treatment and improves the quality of the leather and fur fur semi-finished product. 1 C.p. f-crystals, 1 table.

The invention relates to light industry and can be used in chemical processing of sheepskin raw materials and fur raw materials.

Known methods of carrying out the processes of soaking-pickling fur raw materials include the use of various special additives designed to provide the necessary training leather and fur, fur raw materials to the subsequent processes of tanning and finishing. From the Gia fur, Legprombytizdat, M., 1974).

The closest analogue of the present invention is a method for processing fur raw materials, including: soaking off material in an aqueous solution of chloride, fluorosilicate, sodium thiosulfate and surfactants for 22-24 hours at a volume ratio to 9 and a temperature of 38oC; pickling in a solution of acetic acid and sodium chloride within 24-26 hours at a temperature of 42oC and liquid-factor - 9; tanning chrome tanning agent and finishing operations ("single processing technology of rabbit, Createrepo., M., 1990).

This method of processing is very long technological cycle and protects the hair from skolachivaniya and teclast when liquid treatments.

The aim of the proposed method is to improve the quality of preparation of leather and fur and shorter duration liquid treatments.

This objective is achieved in that in the method of processing of fur raw material by soaking in the presence of the target additives, pickling in the presence of organic acids and sodium chloride and tanning, according to the invention, in the process of soaking and/or pickling as the target additives used in the camping 1 M aqueous solution of carboxylic acid and furfural, and as a dispersed phase containing collagen material with a concentration of 1-4 g/l, calculated on the dry matter, while the total concentration of biopolymer dispersions in: soaking off and pickling does not exceed 4 g/L.

Specified a modified biopolymer dispersion is prepared as follows: collagen containing material after preliminary alkaline-saline treatment and neutralization subjected to forced dissolution in 1 M aqueous solution of carboxylic acid (acetic, formic, and others). The resulting mass is homogenized and injected into the system furfural in an amount to provide education azeotrope with the dispersion medium.

Specified modified biopolymer dispersion possesses a number of characteristics, among them, a surfactant and an antiseptic that allows you to completely exclude the application of the process of soaking chloride, fertilitate and sodium thiosulfate and nonionic surfactants, reduce the duration of soaking and pickling, and also allows you to provide the necessary training leather fur raw material for subsequent treatments, significantly reduce skolachivaniya hairline and teclast hair.

Pickling start in the/l, and after 5 hours after the beginning of the process of introducing sodium chloride.

The proposed parameters of soaking and pickling have a positive impact on subsequent processes. Tanning increases viviremos tanning with chromium compounds from the treatment solution that can reduce the initial concentrations of chromium in the processing solution. Ready fur semi-finished product obtained by the proposed method has a high ductility and strength.

The method is as follows.

Raw material is subjected to: soaking off in an aqueous solution of a modified biopolymer dispersion with a concentration of 1-4 g/l, counting on a solid residue, at a temperature of 25-30oC, the LCD 9 and duration of 7-12 hours. Then lead meskene, centrifuge and pickling.

Pickling is carried out in a solution of the modified biopolymer dispersion with a concentration of 1-4 g/l, counting on dry residue and carboxylic acid, the concentration of which does not exceed 14 g/l, taking into account the amount of acid made from biopolymer dispersion at a temperature of 25-27oC, THE LCD 9. Five hours from the start of processing contribute sodium chloride to a concentration of 50 g/L. the Total duration of the eye prototype.

Specific examples of the treatments listed in the table.

The legend in the table below:

"C" is the concentration of the biopolymer dispersion;

- tensile strength Pori tension;

l - elongation at break.

1. The method of processing of fur raw material by soaking in the presence of the target additives, pickling in the presence of organic acids and sodium chloride and tanned, characterized in that in the process of soaking and/or pickling as the target additive use a modified biopolymer dispersion containing as a dispersion medium azeotropic mixture of 1M aqueous solution of carboxylic acid and furfural, as well as the dispersed phase - containing collagen material with a concentration of 1 to 4 g/l, calculated on the dry matter, while the total concentration of biopolymer dispersions in: soaking off and pickling does not exceed 4 g/L.

2. The method according to p. 1. characterized in that the start pickling in a solution of modified dispersion and the organic acid, the total concentration of the acid does not exceed 14 g/l, and 5 h after the beginning of the process of introducing sodium chloride.

 

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