The way of processing leather

 

(57) Abstract:

The method relates to the processing of the leather. The leather is simultaneously hydrophobizing and profit in the following way. On 100 wt.h. the product obtained by vitaliana fat and collagen containing waste from the membrane and trimmings, enter 1-6,5 wt.h. acid and 3,5-65 wt.h. poly(aloxi)silsesquioxane. The resulting preparation in the amount of 1-7% by weight of the semifinished product is applied on its surface and is subjected to vibration treatment within 2-4 min at a frequency of 1-10 Hz. The method provides for obtaining ecologically perfect high-performance production. table 2.

The invention relates to light industry and can be used in the production of leather and fur.

It is well known the use of different fats for fatliquoring and when suede tanned skin fats of marine animals. (Chemistry and technology of leather and fur, Ed. by I. P. Strakhov, ed. Light industry, 1979, S. 223, 350).

Water properties of fur and leather semi-finished product makes machining polyethylsiloxane liquid NGL-94 mixed with dimethylsiloxane liquid PMS-200 and a cross-linking agent - tetramethoxysilane environment butyl acetate in the ratio 2:2:1 with supplies is the fur industry, 1983, No. 9, S. 1-15.)

The main disadvantages of the existing processes is the inability to use greasing preparations for joint implementation processes fatliquoring, waterproofing and tanning waste-free technology that eliminates the use of toxic tannins inorganic and organic origin.

The aim of the invention is a radical change in the production technology of leather and fur at the expense of processing on site waste in the form of scrapings and trimming to produce fundamentally new products, in the ecologically clean synthesis, which have tanning, oiling and gidrofobiziruyuschimi properties, and provide environmentally perfect high-performance production at vibrating joint processes.

This goal is achieved by the fact that 100 wt. including product obtained by vitaliana fat and kollagensoderzhaschego waste from the membrane and trimmings enter 1.0 to about 6.5 wt.h. acid and 3.5 to 6.5 wt.h. poly(alkoxy)silsesquioxane, and the resulting preparation in the amount of 1-7% by weight of the semifinished product is applied on its surface and is subjected to vibration treatment within 2-4 min at a frequency of 1-10 Hz.

Advantage saleemul and vibrating machine for processing leather and fur, production developed in Russia. Using the proposed method reduces the duration of the processes of making two orders of magnitude, saves energy, transportation funds, purchasing, storing, preparing solutions for use in the shop and on hinstance, disposes of the waste from the leather and fur production, eliminates waste water operations tanning, fatliquoring and waterproofing, greatly improve working conditions. The use of waste, for example, fur factories in the form of scrapings and trimmings, the extraction of a mixture of fats and kollagensoderzhaschego waste when vitaliani, holding their condensation with poly(alkoxy)silsesquioxane, produced by the domestic industry capacity, opens up great opportunities in creating new technologies for the production of fur and leather.

The method is as follows. Of waste from meskene and trimmings heated with the product, which is filtered and fed into the reactor where add sulfuric acid, and then poly(aloxi)silsesquioxane General formula:

< / BR>
where R=C2H5-C4H9; R'=C6H13-C18H37;

m=4-6 n=1-3.

For example, used a typical representative of this to is the temperature of 100-130oC under stirring. The estimated number of components of the reaction mixture are given in table. 1 at the end of the description.

After carrying out the synthesis carry out the neutralization of the drug layer. The resulting products have baselinetobo mass from light yellow to brown color with a characteristic smell.

The drug is put on the fur sheepskin, tanned production technology including the operation of pickling and subjected to vibrohvostami at frequencies from 1 to 10 Hz for 4-6 min, thus conducting operations tanning-fatliquoring - of waterproofing. Further the sheepskin was subjected to processing by a Single processing technology fur sheepskin (fur processing Technology sheepskin, appr. Deputy Minister of light industry 8.10.81).

Examples of specific implementation method of processing semi-finished new drug are given in table 2. (see end of description), which presents the average results of three parallel experiments for each option.

From the data table. 2 shows that the use of new drugs for tanning, fatliquoring, filling and waterproofing fur sheepskin allows to increase the values of elongation at break, to increase the stability of the semi-finished product to the action is whether the new drug.

The leather when it is white, well polished, and the hair of its natural properties, as it is not subjected to harsh chemical treatments tanning.

Using concentrations of sulfuric acid > 6.5 per cent leads to an increase in the duration of hydrolysis. High concentrations of sulfuric acid require increasing the concentration of the neutralizing agent. Lower concentrations of poly(alkoxy)silsesquioxane is not possible to increase the stability of the semi-finished product to the action of water. Higher concentrations of this drug led to the rise of the obtained product.

The frequency of treatment related to its duration. With increasing frequency, treatment duration is reduced. Higher frequencies are not technology for equipment and maintenance personnel. Consumption of the drug is determined by the achievement of boundary indicators: temperature welding, the possibility of binding of the drug with Koshevoy cloth.

The way of processing leather, including the hydrophobicity of its surface by applying kremniiorganicheskie product, characterized in that per 100 wt.h. the product obtained by vitaliana fat and collagenosis the military preparation in the amount of 1 - 7% by weight of the semifinished product is applied on its surface and is subjected to vibration treatment within 2 to 4 minutes at a frequency of 1 - 10 Hz.

 

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Method of finishing // 2127763
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