RU2748944C1 - Method for processing hide leather fabric - Google Patents

Abstract

FIELD: leather and fur industry.SUBSTANCE: invention relates to the leather and fur industry, it can be used for processing hides. The method of processing the hide leather fabric provides for the preliminary preparation of the hide by tanning with aqueous solutions of chromium trivalent salts during daily soaking, followed by washing, soaking in clean cold water, drying in a centrifuge at 1000 rotations and drying in a natural way. Next, the hide is stretched on an aluminum frame and the hide leather fabric is gradually treated with sandpaper for 1000 grains, 2000 grains, 3000 grains, blowing out the dust with a compressor. After that, the hide is stretched on an aluminum frame and the leather fabric is painted by applying drawings with ultraviolet (UV) inkjet printing using UV-curable ink, followed by kneading the hide removed from the frame. Next, the hide is placed on a wooden shield, a thin layer of polymer “glue-sealant Moment” is applied to the hide leather fabric with a spatula, and the hide is dried in a natural way for a day, after which its surface is treated with a UV lamp for 3-5 minutes. The hide is removed from the shield and soaked for 40 minutes in warm water of 50-60ºC with the addition of salt. Then, the hide is dried in a centrifuge at 1000 rotations and stretched again on a wooden shield for natural drying. After that, the hide is removed and kneaded by hand, and further processing of the hide leather fabric is performed with KENDA FARBEN for a glossy or matte effect, followed by drying and processing the hide surface with a vibrating machine with a felt disk.EFFECT: proposed method of processing the hide leather fabric provides increased resistance to mechanical damage and to the fading of the hide leather fabric.1 cl, 1 ex

Description

Technology area

The invention relates to the leather and fur industry and can be used for leather processing

State of the art

There is a known method of varnishing and simultaneous waterproofing of leather, fur and leather substitutes (Patent EP 0087799 IPC С14С 1/00. Priority 09/07/1983), containing lubrication and simultaneous hydrophobization of leather, fur and leather substitutes, in which the material to be lubricated and hydrophobized is processed in an aqueous solution containing a lubricating and hydrophobizing agent. Compounds of formula <IMAGE> are used as fat burning and waterproofing agents in which X, R, M and z can be, for example, a diol, hydroxyl compound, monovalent metal, or an integer from 1-10.

The disadvantage of this method is the low resistance to mechanical damage and fading of leather fabric.

Known ultraviolet printing on the flesh (Patent US 6799828 B2 IPC B41J 2/01. Priority 2000-05-23). The printing unit has a printing unit. An inert gas supply is coupled to the printing device to provide the components of the printing device with an inert gas. An inkjet device comprising: a reservoir for supplying ink and a path for transporting ink; inkjet print head); and a deaerator having an ink passage, a membrane (52) and a vacuum chamber, the ink passage having an outlet connected to the ink print head and having an outlet.

The disadvantage of this seal is its low resistance to mechanical damage and fading of leather fabric.

The closest in technical essence and the achieved result is a method of processing leather fabric (Patent RU 2036974 IPC С14С 9/00. Published: 09.06.1995), including retanning, dyeing, fatliquoring, filling and hydrophobization, and retanning, dyeing, fatliquoring, filling and hydrophobization is carried out with a dispersion consisting of silicone preparations of a siloxane and elementosiloxane structure, individual water-soluble dyes and their mixtures, poly (alkoxy) (acyloxy) silsesquioxapes or polyorgano (acyloxy) silsesquiazans in a mixture with surfactants in amounts equal to 0.5- 5, 2-8 and 4-8% of the weight of the semi-finished product, concentration 8-15 g / l, pH 4-8 with a processing time of 6-10 hours.

The disadvantage of this method is the low resistance to mechanical damage and fading of leather fabric.

Disclosure of invention

The technical result of the invention is to increase the resistance to mechanical damage and to fading of the skin tissue of the skin by preliminary preparation of leather raw materials, dyeing and subsequent processing.

The present technical result is achieved in the method of processing the leather tissue of the hide, characterized in that preliminary preparation of the hide is performed by tanning with aqueous solutions of trivalent chromium salts with daily soaking followed by washing, soaking in clean cold water, drying in a centrifuge at 1000 rpm and drying in a natural way, then the skin is pulled on an aluminum frame and the leather fabric of the skin is gradually processed with sandpaper for 1000 grains, 2000 grains, 3000 grains, blowing out dust with a compressor, after that on the skin stretched on an aluminum frame, the leather fabric is painted by applying patterns with ultraviolet (UV) inkjet printing using UV-curable ink, followed by kneading the skin removed from the frame, then the skin is placed on a wooden shield and a thin layer of polymer "glue-sealant Moment" is applied with a spatula with a spatula and dried naturally for a day, after which it is processed with a UV lamp for 3-5 minutes, remove the skin from the shield and soak for 40 minutes in warm water at 50-60 ° C with the addition of table salt, then dry the skin in a centrifuge at 1000 rpm, and pull it back onto a wooden shield for natural drying, after which it is removed and kneaded by hand, further processing of the leather fabric of the hide is performed with KENDA FARBEN for a glossy or matte effect, followed by drying and surface treatment of the hide with a vibration machine with a felt disc.

Distinctive features include:

perform preliminary preparation of the skin by tanning with aqueous solutions of trivalent chromium salts during daily soaking followed by washing, soaking in clean cold water, drying in a centrifuge at 1000 rpm and drying in a natural way, then the skin is pulled on an aluminum frame and the leather cloth is gradually processed with sandpaper 1000 grains, 2000 grains, 3000 grains, blowing out dust with a compressor, while at each stage the quality of grinding is controlled by the organoleptic method and such a sequence of preliminary preparation actions leads to an increase in resistance to mechanical damage and to fading of leather tissue;

on the skin stretched on an aluminum frame, the leather fabric is dyed by applying patterns with ultraviolet (UV) inkjet printing using UV curing ink, followed by kneading the skin removed from the frame, this type of painting increases the resistance to mechanical damage and fading of the leather fabric;

the skin is placed on a wooden shield and a thin layer of "Moment glue-sealant" polymer is applied with a spatula with a spatula and dried naturally during the day, after which the surface is treated with a UV lamp for 3-5 minutes, the skin is removed from the shield and soaked in for 40 minutes in warm water 50-60 ° C with the addition of sodium chloride, then the skin is dried in a centrifuge at 1000 rpm, and again pulled on a wooden board for natural drying, after which it is removed and kneaded by hand, such a sequence of polymerization and surface treatment results to increase resistance to mechanical damage and to fading of leather fabric;

further processing of the leather fabric of the hide is carried out with the KENDA FARBEN agent for a glossy or matte effect, followed by drying and processing of the surface of the hide with a vibration machine with a felt disc, while the processing time is determined by the organoleptic method and this execution of the final treatment of the surface of the hide increases resistance to mechanical damage and fading leather tissue.

Comparison of the claimed solution with analogs and the prototype did not allow us to identify in them the features that distinguish the claimed solution, which allows us to conclude that the criterion of "novelty" is met.

Implementation of the invention

An example of the sequential processing of the leather fabric of the hide by preliminary preparation of the hide, the application of patterns on the leather fabric with ultraviolet inkjet printing, the surface treatment with a UV lamp and giving it a glossy or matte effect.

Initially, preliminary preparation of the skin is performed by tanning with aqueous solutions of trivalent chromium salts with daily soaking, followed by washing, soaking in clean cold water, drying in a centrifuge at 1000 rpm and drying in a natural way. Next, the skin is pulled on an aluminum frame and the leather tissue of the skin is gradually processed with sandpaper for 1000 grains, 2000 grains, 3000 grains, while at each stage the quality of grinding is monitored by the organoleptic method (determination of product quality indicators based on the analysis of sensory perception - mainly vision) ... Dust is blown out with a compressor.

In the next step, on the skin stretched on an aluminum frame, the leather fabric is dyed by applying patterns with ultraviolet (UV) inkjet printing using UV curable ink, followed by kneading the skin removed from the frame.

Next, the skin is placed on a wooden shield and a thin layer of "Moment glue-sealant" polymer is applied with a spatula with a spatula and dried naturally during the day, after which the surface is treated with a UV lamp for 3-5 minutes, the skin is removed from the shield and soaked. for 40 minutes in warm water 50-60 ° C with the addition of table salt, then the skin is dried in a centrifuge at 1000 rpm, and again pulled on a wooden board for natural drying, after which it is removed and kneaded by hand.

Upon completion, further processing of the leather tissue of the hide is performed with KENDA FARBEN for a glossy or matte effect [4], followed by drying and surface treatment of the hide with a vibration machine with a felt disc, the processing time is determined by the organoleptic method.

Thus, the leather tissue of the hide created by successive processing gives an increase in resistance to mechanical damage and to fading.

Information sources

1. Patent EP 0087799 IPC S14S 1/00. Priority 09/07/1983.

2. Patent US 6799828 B2 IPC B41J 2/01. Priority 2000-05-23.

3. Patent RU 2036974 IPC S14S 9/00. Published: 09.06.1995.

4.http: //www.kendafarben.com/?lan=RU.

Claims (1)

A method of processing leather fabrics of skins, characterized by the fact that preliminary preparation of skins is performed by tanning with aqueous solutions of trivalent chromium salts during daily soaking, followed by washing, soaking in clean cold water, drying in a centrifuge at 1000 rpm and drying in a natural way, then the skin is pulled on an aluminum frame and step by step process the leather fabric of the hide with sandpaper for 1000 grains, 2000 grains, 3000 grains, blowing the dust with a compressor, then on the skin stretched on an aluminum frame, the leather fabric is painted by applying patterns with ultraviolet (UV) inkjet printing using UV curing ink, followed by kneading the skin removed from the frame, then the skin is placed on a wooden shield and a thin layer of "Moment glue-sealant" polymer is applied to the leather fabric of the skin with a spatula and dried naturally during the day, after which the surface is treated with a UV lamp for 3-5 minutes, take off w chicken from the shield and soaked for 40 minutes in warm water 50-60 ° C with the addition of table salt, then the skin is dried in a centrifuge at 1000 rpm and pulled again on a wooden shield for natural drying, after which it is removed and kneaded by hand, further processing of leather skin fabrics are made with KENDA FARBEN for a glossy or matte effect, followed by drying and surface treatment of the skin with a vibrating machine with a felt disc.