Way to finish genuine leather

 

(57) Abstract:

The invention relates to the finishing of natural leather and can be used in the production of leather haberdashery. The method includes applying a natural wax with a melting point 62-92oWith the front surface of sliced skin in the form of the product with a brush rotating at a speed of not less than 1400 rpm, to obtain a given color. The technical result is simplification finish when getting leather antique with shades from light to dark tones, expanding the range of products that meet current market requirements, and improving the environmental friendliness of the process.

The invention relates to light industry, and specifically to its leather industry, and can be used for finishing leather in the manufacturing of leather haberdashery.

Thanks to the introduction of high technologies in the finishing production of natural leather is enhanced leather quality, expanding their range, reduces the consumption of raw materials, water, chemical materials, reduces the volume and fouling wastewater, improving the environment, are created of low-waste and non-waste technology.

To improve the quality of the skin on her Leah from raw skin preparations for products leather haberdashery, in which the intermediate supporting layer put the finishing material, and then finishing composition, a varnish layer, is transferred onto damp skin, removing the intermediate layer, and the transfer of lead to the forming press.

(DE 3712579, CL 14 IN 1/56; 14 WITH 15/00, 87)

A known method of manufacturing a skin surface, comprising applying to the main skin surface coating of two layers of reinforced plastic.

(DE 3832822, CL 14 WITH 11/00, 88)

However, the known methods of complex technological performance.

There is a method of improving the quality of the skin by filling the skin polymers, stabilizers, Caseinates.

(SU 158974, CL 14 WITH 9/00, 88)

However, used chemical materials pollute waste water, degrade the environment.

There is a method of refining scrap leather by applying artificial person (adhesive, latex-casein, nitro cellulose and others).

(SU 76216, CL 14 WITH 11/00, 1940)

The skin treated in a known manner, do not meet the quality haberdashery industry.

The known method of decorative finishes natural leather by printing on the skin, does not contain nitromannite, the current 35% to 60% oily resinous varnish (MSL); 25-55% of a wax; about 5-15% of wetting agent and 2-3% carbon black.

(SU 709682, WITH 14 11/00, 80)

However used in a known way, the composition is difficult to make and thus complicates the process.

A method of processing natural leather from dairy calf skin parchment to give it the properties of old, while the skin after washing is subjected to shaving, and the final operation is bleaching with chlorine solution concentration of 5-8 g/l

(SU 704990, CL 14 WITH 13/00, 80)

However, the known method using chemical materials, pollute the environment, long-term and complex in execution.

The objective of the invention is to provide a method of finishing of the leather, ensuring the achievement of the technical result consists in simplifying the finish when getting leather antique with shades from light to dark tones, expanding the range of products that meet current market requirements, and improving the environmental friendliness of the process.

This technical result is achieved by way of the finish of genuine leather, including the application of natural wax with a melting point 62-92oWith the front surface of sliced skin in the form of products using agemon the way to the skin surface causing a natural wax. Wax is a substance consisting of esters of higher fatty acids and higher monohydroxy alcohols; fatty acids and alcohols with 16 to 30 carbon atoms in the molecule; hydrocarbons and impurities coloring and odorous substances.

Their physical properties are plastic that can soften at low heat, do not wetted by water, do not conduct electricity, they are chemically inert.

In the proposed method uses the following brand waxes:

Technical beeswax - yellow color, with different shades, honey has a pleasant odor; melting point 62-67oC; density 0,960-0,970; acid number - 18-20; iodine number - 7-11.

Montany wax - topl.- 73-80oC; acid number - 20-40.

Carnauba wax - yellow to dark-brown color, with a faint odor; topl.- 83-90oC; acid number up to 8.

Candelilla wax - brown to red-brown; topl.- 80-92oC.

As products processed products leather haberdashery - folders-menu, folders, accounts, covers, etc.

The proposed method separates the skin (without artificial surfaces), for example, becoming the th technology.

The leather products leather goods manufacture by standard methods from the skins of cattle, and proposed finish wax is the final stage.

Waxing on the front surface of the natural sliced polished leather product, such as a folder, perform the machine "Mebus, which contains a rotating shaft with a nozzle in the form of a brush with a dense pile, it is applied, for example, technical beeswax melting temperature 62-67oWith, then the folder uniformly pressed by the brush rotating at a speed of 1400 rpm, and process to a specified color, for example, for 0.5-5 sec. On the skin surface for a few seconds and a thin layer that gives skin a tint of artificial aging, and the product takes the form of valuable old subject.

The claimed combination of features allows you to create products with new properties, and go beyond the proposed limits do not provide technical result.

The proposed treatment protects the facial skin surface from mechanical damage (scratches), from moisture, oil stains, traces of hands. The product becomes more intensive and sustainable shade-resistant whatsa film, the natural surface of this coating preserves the natural figure of the skin, get the natural skin texture tone from light yellow to dark brown tones.

Color fastness of leather, decorated according to the invention (points according to GOST 9733-0-83), dry friction is 5 points, under wet friction 5 points.

The use of natural wax, which is a substance of vegetable and animal origin, allows you to create an environmentally friendly way.

When processing the front surface of the sliced skin get relief with a natural structure of the skin, when processing planed, sanded skin get skin's natural texture, the proposed technical solution is the final stage of finishing products leather haberdashery.

Leather lined on the proposed method may have various deep rich color shades of the front surface with preservation of the natural pattern of the skin, and the product becomes old way, it contributes to the expansion of the range of products of good quality and meets the requirements of the modern consumer.

With the> is on the front surface of the sliced skin in the form of the product with a brush rotating at a speed of not less than 1400 rpm, to obtain a given color.

 

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The invention relates to the production of the tanning agent used in the production of leather and fur

The invention relates to leather manufacture, and can be used when finishing lining leather from the hides of cattle

FIELD: leather industry.

SUBSTANCE: semifinished product is degreased, neutralized, dyed, and lubricated. Dyeing is performed in two washing-interrupted steps with anionic black dye consumed in amount 0.5-0.6% of the weight of semifinished product in each dyeing step. Lubrication is followed by retannage with chrome tanner in amount 0.6-1.0% of the weight of semifinished product (calculated for chromium oxide) and treatment with 0.8-1.0% of spindle oil.

EFFECT: achieved deep black color and high performance characteristics.

1 tbl, 5 ex

FIELD: light industry.

SUBSTANCE: powdered thermoplastic polyurethane with reduced melting point is applied on fur article parts in most wear place, said polyurethane being prepared from 4,4-diphenylmethanediisocyanate, poly(butylene glycol adipate) and 1,4-butanediol serving as chain extension agent. Thus treated part is then pressed at 64-75°C and remained to lie.

EFFECT: improved quality of fur articles due to increased hair-to-skin tissue binding strength, resistance of hair coat against wear, and increased lifetime of clothes.

FIELD: leather industry.

SUBSTANCE: invention relates to finishing of various-destination leathers made from various types of raw skins and consists in consecutively applying layers of soaking ground, covering paint, and fixing agent. After applying each layer, leather is dried for 5 to 50 sec in microwave fields at field intensity 10000-15000 v/m and power 300-3500 W.

EFFECT: expanded technological possibilities and improved quality of coating.

1 tbl, 5 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: light industry; methods of forming of volumetric and curvilinear details for an article.

SUBSTANCE: the invention is pertaining to the field of light industry, in particular, to the methods of forming of volumetric and curvilinear details for an article is intended for usage in light industry at forming volumetric and curvilinear details for articles made out of a leather, predominantly - clothing. The method consists that on the surface of the flesh side of hide of the flat component of the article made out of leather deposit the polymeric composition containing the following elements (in mass %): - polyvinyl acetate homopolymeric coarse-dispersed plasticized dispersion - 20-35; - dibutyl phthalate (DPHT) - 1.5-15; - water - the rest. The composition may be deposited in the form of a net on in advance prepared templates. After that the component of the article is dried at an indoor temperature. Then the component of the article is formed, for example, by hot pressing at 70-90°C during 1.5-2.0 minutes. And fix the gained form by chilling. The invention ensures improvement of quality of the articles made out of leather due to increased the form stability of components of the article.

EFFECT: the invention ensures improvement of quality of the articles made out of leather due to increased the form stability of components of the article.

4 cl

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: leather industry.

SUBSTANCE: invention relates to wax emulsions used in coating pain composition designed for finishing genuine leathers and provides a wax emulsion component, which represents polyvinylacetate dispersion containing non-plasticized polyvinylacetate in amount at least 45 wt %, content of polyvinylacetate dispersion in wax emulsion ranging from 40 to 80%. Proposed component when used in wax emulsion allows leather coatings to be obtained manifesting good organoleptic properties, high temperature resistance, low tackiness, and agreeable leather to the touch at moderate cost of wax emulsion.

EFFECT: improved consumer's quality and enlarged resource of wax emulsion components.

1 tbl, 6 ex

FIELD: leather industry.

SUBSTANCE: method, which is suitable for finishing chrome leathers, comprises consecutively applying coating layers followed by action with low-temperature plasma at generator lamp anodic current intensity 0.2-0.6 A. Action of low-temperature plasma is effected for 180-240 sec at pressure 13.3-26.6 Pa in discharge chamber and consumption of plasma-forming gas (argon) 0.035-0.04 g/sec. Method is implemented on high-frequency plasma installation.

EFFECT: increased adhesion of coating to dry and wet leather, dye penetration depth, resistance to repetitive bends, and strength at better quality of leather.

FIELD: process engineering.

SUBSTANCE: proposed method comprises eliminating defects representing damages sports (3) in layers (2) formed by recesses in skin (1) with natural grain patter. These defects are eliminated as follows, i.e. water or slightly foamed plastic suspension is forced into aforesaid recesses, the said suspension containing ultimate solid particles. Then skin (1) is dried, surface (4) of the layer of grain pattern (2) is subjected to pressure and thermal treatment with the help of pressure roller at least 100C. Note here that plastic mass is formed in aforesaid recesses that contains hollow tiny balloons (5) made up of solid particles to completely fill the said recesses (dwg. 1).

EFFECT: higher quality.

13 cl, 1 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: all layers of undercoat and finish paint are applied on leather subjected, prior to drum painting, to low-temperature non-equilibrium plasma of high-frequency discharge. Exposure is performed for 241 to 280 seconds in discharge chamber at 26.7 to 30.0 Pa, flow rate of plasma-forming argon making 0.041 to 0.06 g/s at discharge power of 0.7 to 2 kW.

EFFECT: increased depth of paint penetration, improved quality of ready leather.

1 dwg, 1 tbl

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