The method of restoring ancient skin
(57) Abstract:Usage: to restore ancient skin. The essence of the invention: skin remove impurities by immersion in complex hydrolytic enzymes. As of this complex use multimemory. The complex is used in an amount of 1-2 g/l at 1 m2surface to be treated. Within 0,5 - 3,0 h handle this complex. Then carry out a skin treatment mixture containing glycerol. Additionally, the mixture may contain a derivative of guanidine and water. Pressed. 1 C.p. f-crystals. The present invention relates to a method of restoring ancient leather vegetable tanned received before 1850, for example, leather covers of old books.Aging skin covers of books accompanied by changes in its physical, mechanical and chemical properties. The reason for this is the old glue, oxidized fats, greases, oxidized proteins, and the like.There is a method of mitigating the destroyed skin by immersion in a special composition containing two kinds of polyethylene glycol (1 liter of water, add 40 g (polyethylene glycol) PEG 400 and 125 g of PEG-150).Polyethylene glycol as a binder, leads to vosstanovleniya 
The closest analogue is the way of restoration of ancient skin, including moisture, removing dirt and processing feeding means while before processing feeding means provide improved physical properties by applying to the skin a mixture of glycerin and PVA, and after processing to produce the pressing of the skin under the pressure of 80 to 100 kg/cm2and grinding, and hydration leads in the presence of salt, and as agents use bone oil 
However, existing skin contamination have different origins and are chemically bonded with collagen fibers, therefore, the proposed method does not substantially remove the degradation products and to ensure effective remediation.The present invention is to improve the quality of the recovered samples of the skin, as well as improving their physical properties.This object is achieved in that in the known method of restoring ancient skin, including the removal of dirt, skin treatment mixture containing glycerol and subsequent pressing, according to the invention the removal of impurities is carried out by immersion of the skin in complai surface for 0.5 to 3.0 hoursAfter removal of impurities to improve the physical properties produce a skin treatment mixture containing glycerol components surfactant is a derivative of guanidine and water.The invention consists in the fact that the proposed method provides hydrolytic removal Nikolayevich components of the leather, and declare quantitative characteristics contribute to the achievement of the required degree of purification of the skin from pollution.The method is as follows.The skin along with the remnants of parts of the cover (cardboard, wood, paper) is placed in a cuvette containing aqueous solution multivaria in the amount of 1-2 g/l at 1 m2surface to be treated and maintained there at T=35 - 37oC no more than 3 hours In the process: soaking off the skin free from parts of the binding and dirt with a soft brush. After cleaning the skin rinsed with distilled water until such time as the water will remain clean. Then the skin is lined with a damp cloth soaked in a mixture containing glycerin where to improve physical properties, in particular strength, components are added surfactant derivative of guanidine and water; after which the skin is kept in tip the AGI and put under a gentle press.A specific example of implementation of the method.Take the leather cover size 0.2 m x 0.5 m, with a surface area S 0.2 m2. Put it in an enamel cell and completely fill with mortar consisting of 0.30 g multivaria and 1 l of distilled water. Within 2 hours the skin is kept in a cell at T 35 37oC. using a soft brush to remove various stickers and visible dirt. After removal of the contamination, the skin is rinsed with distilled water, up until the water becomes clean. Then the skin is soaked swab dipped in a solution consisting of 3 parts of glycerol, 7 parts water, 1 part of 2% aqueous solution of guanidine derivative of polyhexamethyleneguanidine. The skin is dried in the open air for 1 h, placed between sheets of waxed and filter paper and placed under a gentle press. The paper periodically (after 12 h) change to the complete drying of the skin.The tests have shown that if the amount of enzyme is less than 1 g/l at 1 m2the treated surface, it is not enough to carry out the chemical reactions of formation of enzyme-substrate complex.Needless amount of enzyme (>2 g/l at 1 m2the surface of univitelinos leather binding in the complex hydrolytic enzymes is less than 0.5 h, it is not enough for the full implementation of the hydrolysis reactions, and if this time exceeds 3.0 hours, it loses collagen and becomes unsuitable for further restoration of the bookbinder. 1. The method of restoring ancient skin, including the removal of dirt, skin treatment mixture containing glycerol and subsequent pressing, characterized in that the removal of impurities is carried out by immersion of the skin in the complex hydrolytic enzymes, for example, multimemory in quantity of 1
2 g/l at 1 m2surface to be treated for 0.5 to 3.0 hours2. The method according to p. 1, characterized in that the mixture containing glycerin, includes surfactant is a derivative of guanidine and water.
FIELD: tannery or furry production.
SUBSTANCE: the invention is pertaining to the field of tannery or furry production and may be used for a piece by piece treatment of a tanning, furry semi-finished product with emulsions of "water in oil" type. The device for impregnation of sheets contains a mounted on the frame bath with a working compound, in which a corrugated roller is dipped, and also a feeding and auxiliary conveyers and a smoothing roller, a supporting means with a resilient counterbody, an actuator, a tool for removal of a finished semi-product, a device for creation of a hydrodynamic wedge and a pinch roller for engagement of the ribbed roller with the feeding conveyor. The problem of the presented invention is - development of the device simple in its servicing with a high reliability allowing to realize the process of impregnation more efficiently with a possibility of its installation in an automatic production line.
EFFECT: the invention presents a device simple in its servicing, having a high reliability, more efficient realization of the process of impregnation, a possibility of its usage in an automatic production line.
FIELD: chemical technology.
SUBSTANCE: invention relates to greasing and emulsifying substances used in fur, leather and other branches of industry. Invention describes a method for deep sulfonation of oxidized vegetable oils, fats and their mixtures, and oxidized mixtures with the nominal viscosity value in the range 33-75 by viscosimeter VZ-4 at 20°C in their treatment with sodium sulfite. The process is carried out in system consisting of oxidized component or mixture of oxidized components, sodium sulfite, water and soap additives, carboxylic acid, phenol and copper (II) salt as a catalyst in bead mill of vertical type at temperature of environment up to practically complete ceasing or quantitative consumption of sodium sulfite and charge of the latter is calculated by the following formula: mNA2SO3 = 0.006 x mOX x (I.N.)OX wherein mOX and (I.N.)OX mean mass and iodine number of oxidized component or mixture of oxidized components, respectively. The mass ratio of oxidized component and water varies in the range from 1:4 to 1:2.5. Dosing additives with respect to oxidized component are following: soap, 2%; carboxylic acid, 4%; phenol, 2.5%. Oxidized flax, sunflower, soybean and cotton oils, oxidized fish oil and mixtures of vegetable oils with fish oil or pig fat are subjected for sulfonation reaction with air in regimen of intensive bubble bubbling at 105 ± 5°. Soaps in indicated system are represented by sodium stearate and sodium oleate and by reaction mixtures of practically quantitative alkaline hydrolysis of fats and vegetable oils also. Benzoic, oxalic, malonic and citric acids are used as acid, and sulfate, acetate and other water-soluble salts of copper (II) are sued as a catalyst dosed in the amount (2-7.5) x 10-4 mole/kg of the parent charge. The sulfonation reaction degree is 33-40%.
EFFECT: improved preparing method.
5 cl, 1 tbl, 16 ex
FIELD: tanning industry.
SUBSTANCE: process is conducted in vertical mill to which soot, induline, kerosene and diesel fuel are introduced. Then components are mixed and slow heating the apparatus and its content is started after which mixing is switched off and slow heating of mill content is continued. Upon expiration of said time, acids or their compositions, white spirit and fatty additive are introduced and chemical mass-exchange process is performed at spontaneously fixed temperature due to thermal effects of this process and natural cooling at the beginning and at the end, as well as due to forced cooling at intermediate stage characterized by high rates of temperature at maximum of 140-150°C. At the moment when forced cooling is discontinued, 0.5-1.5 h before discontinuation of mixing and beginning of withdrawal at temperature of 80-115°C, 43-52-% solution of aluminum salts and C10-C20 of carboxylic acids is introduced into product being prepared.
EFFECT: facilitated procedure; increased amount of product.
1 tbl, 15 ex
FIELD: leather industry.
SUBSTANCE: preparation of composition is conducted on vertical-type bead mill. Induline, kerosene, and diesel fuel are consecutively charged into mill before stirring mechanism is energized, after which apparatus and contents thereof are slowly heated. Stirring is then stopped for 1 h while slow heating of mill contents is continued. When specified time expires, carboxylic acid or acid mixture, white spirit, fat additive, and aluminum oxide or hydroxide are added. Mechanic stirring is then switched on and contents of the bead mill are ground and the process is carried out at spontaneously fixed temperature caused by heat effects of the processes and natural cooling. When temperature is lowered to 85-120°C, desired product is discharged.
EFFECT: simplified process and increased product discharge degree.
1 tbl, 19 ex
FIELD: process engineering.
SUBSTANCE: oil, fat or polymer is applied on leather in amount of less that 20%, preferably, less than 15%, particularly preferably less than 10%, per leather weight. Then leather is treated by compressed air. Carbon dioxide is used as compressed air, treatment if carried out at pressure below 70 bar and temperature below 25°C. Leather is processed by compressed air unless leather weight is at least 1% smaller than its weight prior to applying oil, fat or polymer.
EFFECT: improved leather structure due to increased non-blocking property of molecules.
SUBSTANCE: method involves chrome tanning and post-tanning a semi-finished product through chrome tanning in the presence of a product of reaction of 3-aminopropyltriethoxysilane and glycidylmethacrylate in molar ratio of 1:2 and consumption of the chrome tanning agent and reaction product of 3-4% and 2-3% of the weight of the semi-finished product respectively. Neutralisation and hydrophobisation with a polymer tanning agent are then carried out for 30-40 minutes with consumption of the tanning agent equal to 8-10% of the weight of the semi-finished product. After that dyeing is carried out in the presence of a synthetic tanning agent in amount of 3-4% of the weight of the semi-finished product. Post-tanning is carried out with a plant-material tanning agent and the semi-finished product is also treated for 20-30 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 respectively, in amount of 3-4% of the weight of the semi-finished product and for 20-30 minutes with organic acid in amount of 0.5-1.0% of the weight of the semi-finished product. Further, the semi-finished product undergoes greasing and re-treated for 40-50 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 and consumption of 7-8% of the weight of the semi-finished product, volume ratio of 0.8-1.0 and temperature of 20-22°C. Hydrophobisation with a polymer tanning agent, dyeing in the presence of a synthetic tanning agent, post-tanning with a plant-material tanning agent, further treatment with a product of reacting hexamethylenediamine with phoshoric acid and urea in the presence of glycerin in the said molar ratio and with organic acid is carried out in one bath. Separation and drying are carried out after all operations.
EFFECT: higher water-, fungus- and heat-resistance of leather under high moisture and temperature conditions, and wide range of special types of leather.
2 cl, 3 tbl, 5 ex
SUBSTANCE: method involves tanning a semi-finished product with a chrome tanning agent, neutralisation, washing, dyeing and tanning with organic tanning agents twice. The first tanning is carried out with a polymeric tanning agent, while the second is carried out with a mixture of synthetic and vegetable tanning agents. Hydrophobicising greasing, treatment with an organic acid and re-tanning with a chrome tanning agent are then carried out. Additional washing is carried out before neutralisation. Dyeing is carried out after the second tanning. Neutralisation, tanning twice and dyeing are carried out at water-to-goods ratio of 0.5-0.7. Hydrophobicising greasing is carried out in the presence of a 20% solution of the product of reacting amino alcohol with fatty acids of vegetable oils of the C12-C22 fraction and boric acid in molar ratio of 2:1:1 in mineral oil in amount of 0.5-1.5% of the weight of the semi-finished product.
EFFECT: good hygienic properties of hydrophobic leather and prolonged fungus resistance of the leather in high humidity and temperature conditions.
2 tbl, 5 ex
FIELD: leather industry.
SUBSTANCE: invention relates to leather industry in production of leather of various assortment, in particular, to methods of drumming leather in presence of fungicide, and can be used in skin processing for improving operational properties. Method of drumming leather is implemented with drumming composition in presence of an effective antifungal inhibitor, the latter is represented by 6.0 % solution of N1-chloro-methylbenzimidazole fungicide. Fungicide is dissolved in ethyl alcohol taken in the amount of 0.2-0.5 % of squeezed leather weight at the drumming composition consumption of 20-22 % of the squeezed leather weight in terms of 100 % fat. Drumming time is 1.5-2.5 hours at the temperature of 70-80 °C.
EFFECT: proposed method of drumming leather provides effective antifungal inhibition at high quality of finished skin.
1 cl, 2 tbl, 3 ex