The method of processing of fur skins

 

(57) Abstract:

The method relates to the processing of fur skins and can be used in commercially-dyeing production to prepare for dyeing with acid dyes. The method includes tanning aqueous composition comprising formalin 40%, chloride and sodium carbonate. Tanning add product "Gamma 3", which is a composition consisting of nonionic surfactant, organic solvent and additives on the basis of cyclic terpenes, and the tanning agent M" a preparation on the basis of polyacetale low molecular weight alcohols and additives. The drug "Gamma 3" introduced at the beginning of processing, and the tanning agent M" in two stages: through 1.0 to 1.5 hours from the start of treatment and after another 1.0 to 1.5 h at the same time with 40% formalin. After tanning spend Salk-greasing for 4-6 hours Then carry out greasing with subsequent gouging. The technical result is to reduce the duration of the processing of fur skins while improving environmental fur semi-finished product. 2 C.p. f-crystals, 2 tab.

The invention relates to light industry, in particular the fur sub-sectors, and can be used in commercially-dye proizvoditeli tanning water composition, including formaldehyde 40% - 2.5 ml/l, sodium chloride and 40 g/l, sodium carbonate and 0.75-1.0 g/l, followed by runoff, leaching, extraction, rasprava and pickling, aging, pressing and creasing in the drum, and so on (single processing technology mink, M., Createrepo, 1989 - prototype).

The main problem to address with the inventive method is the reduction of treatment duration of fur skins while improving environmental fur semi-finished product by reducing the formaldehyde content in leather and hair.

This object is achieved by the proposed method of processing of fur skins.

The essence of the proposed method consists in the aggregate of the following essential characteristics sufficient to achieve the technical result, namely:

in the method of processing of fur skins by gouging, tanning aqueous composition comprising formalin 40%, chloride and sodium carbonate, and fatliquoring in the drum, tanning add drugs "Gamma-3" and "tanning agent M" in the amount of 0,5-1,0 g/l and 5.0-7.0 g/l, the drug "Gamma 3" introduced at the beginning of treatment and medication "tanning agent M" in two steps: the number is, the moreover, after tanning spend Salk-greasing for 4-6 h, and gouges are after fatliquoring in the drum.

Tanning spend a composition containing, g/l: sodium chloride - 40-50, the drug "Gamma 3" - 0,5-1,0, sodium carbonate-1,5-2,0, drug tanning agent M - 5,0-7,0, formaldehyde 40% - 0,1-0,2, water to liters.

Salk-greasing spend a composition containing, g/l: sodium chloride - 20-30, aluminum potassium alum - 20-30, greasing substance - 3,0-3,5, water to liters.

Considering the whole set of essential features, the inventive method of processing of fur skins meets the condition of "novelty."

Drugs "tanning agent M" and "Gamma 3" release on the basis of the technical conditions. Technical conditions "the tanning agent M TU 2484-14/01 - 00302474-01". "The tanning agent M" is a composition based polyacetale low molecular weight alcohols and special additives.

Technical terms "Drugs "Gamma". THE 238100-12/01-00302474-2001,". Drugs "Gamma" is a composition consisting of nonionic surfactant, organic solvent and special additives on the basis of cyclic terpenes.

Comparative analysis of the proposed technical solutions to the prototype (table. 1) tanning agent M" in the amount of 0,5-1,0 g/l and 5.0-7.0 g/l, the drug "Gamma 3" introduced at the beginning of treatment and medication "tanning agent M" in two steps: in the amount of 2.0-3.0 g/l through 1.0 to 1.5 hours from the start of treatment and 3.0-4.0 g/l after 1.0 to 1.5 h at the same time with 0.1-0.2 g/l of formalin 40%, in addition, after tanning spend Salk-greasing for 4-6 h, and gouges are after fatliquoring in the drum.

The present invention may be found to comply with the condition of "inventive step", so as not detected known technical solutions that have the signs consistent with its distinguishing characteristics. The mentioned set of features, in comparison with the prototype, achieving the claimed technical result.

The inventive method are optimal, since the output for the lower limit of the claimed technical result is not achieved, and the upper limit is not economically feasible.

Data supporting the achievement of the claimed technical result is shown in table. 2.

On standardized indicators skins fully meet the requirements of GOST.

Handling of mink on the proposed method is as follows: the tanning of skins is carried out in water stood,0; formalin 40% of 0.1 - 0.2, which in Longboat pour water give sodium chloride, the drug Gamma 3 and the sodium carbonate is 0.5 through 1.0 to 1.5 h treatment add medication "tanning agent M - 2,0-3,0, after 0.5 h of treatment also introduce the sodium carbonate - 1.0 to 1.5 and later 1.0 to 1.5 h add the remaining part of the drug "tanning agent M - 3-4 and formalin 40% of 0.1 - 0.2. Tanning is carried out at 35oC for 6-9 hours followed by Salk-greasing composition containing, g/l: sodium chloride - 20-25; aluminum potassium alum - 20-30; greasing substance - 3,0-3,5, water to liters, and then greasing the dryer and shaving leather skins, etc. of the prototype.

Specific examples of the proposed method of processing of fur skins are given in table.1 (examples 1-3).

The proposed method for the processing of fur skins was tested under production conditions. The test results are positive.

The proposed method for the processing of fur skins allows you to:

to reduce processing time on average 3 times;

- to improve the sustainability fur semi-finished product by reducing the formaldehyde content in leather and hair on average 45%;

- to improve working conditions by reducing consumption of formali is new and meets the condition of "inventive step", because of the known prior art does not detected the influence of distinctive essential features of the claimed method on the achievement of the technical result. Using the proposed method provides this technical result, which indicates compliance of this invention the term "industrial applicability".

1. The method of processing of fur skins by gouging, tanning aqueous composition comprising formalin 40%, chloride and sodium carbonate and greasing in the drum, characterized in that tanning add product "Gamma-3", consisting of nonionic surfactant, organic solvent and additives on the basis of cyclic terpenes, and drug-based polyacetale low molecular weight alcohols in the amount of 0,5-1,0 and 5,0-7,0 g/l, the drug "Gamma-3" are introduced early in the processing, and preparation on the basis of polyacetale low molecular weight alcohols in two steps: in the amount of 2.0 - 3.0 g/l through 1.0 to 1.5 hours from the start of treatment and 3.0 - 4.0 g/l after 1.0 to 1.5 h at the same time with 0.1-0.3 g/l of formalin 40%, in addition, after tanning spend Salk-greasing for 4-6 h, and gouges are after fatliquoring in the drum.

2. The method according to p. 1, the mA - 0,5-1,0

Sodium carbonate - 1,5-2,0

Drug-based polyacetale low molecular weight alcohols - 5,0-7,0

Formalin is a 40% - 0,1-0,2

Water To 1 liter

3. The method according to PP.1 and 2, characterized in that the Salk-greasing spend a composition containing, g/l:

Sodium chloride - 20-30

Alumina-potassium alum - 20-30

Greasing substance - to 3.0-3.5

Water - Up to 1 Le

 

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