CZ283220B6 - Process of relief finish of leather articles and half-finished products from raw leather - Google Patents

Abstract

This manner of relief modification of products and semi-products of raw leather is based on the fact that their face side is partially treated and then before further treatment coloured, e.g. by brush, grouting, spraying or dipping into a colouring bath. In the additional surface treatment it is preferable to spray the face side with a wax or oil emulsion, spray with a binder, fix with an emulsion varnish and final ironing.

Description

To date, leather products and semi-finished products of raw leather, such as women's handbags, bags, etc., have been treated in a variety of ways in which dyed hides are often used, with the dyeing being carried out in the treatment plant in an industrial way. leather.

In addition, embossed face finishes are known in some leather articles, such as bags. Known methods of embossing include hammering, where a patterned matrix is applied to the obverse side of the skin, and tapping the matrix with a hammer pushes the pattern into the skin surface. A similar known method is compression, in which the patterned matrix is pressed against the leather by means of a pressing plate. Punching is also used in which shaped holes such as asterisks, wheels and the like are created in the leather using punching tools in the leather.

The drawbacks of these traditional processes are that the resulting products of different manufacturers are very similar in terms of surface finish, with differences only in the quality of the craftsmanship, and lack of original piece leather goods with a characteristic finish that is new, fashionable and in demand individual elements, while maintaining the required technological low-batch production for industrial production and the necessary parameters in terms of utility properties.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks are largely eliminated by the method of embossing the leather products and the raw leather semi-products according to the invention. It is based on the fact that the face side of these products is at least partially treated by engraving, and then, prior to further surface treatment, dyed with, for example, a brush, a tampon, a spatula, spraying or immersion in a dye bath. Engraved and colored are only the obverse side, and using various techniques, a surface can be created on the obverse with engraved ornaments, paintings, patterns or lines that has a special characteristic appearance, for example when coloring engraved lines with dark outline by brush. by hand or by spraying. The facing side of the article or semi-finished product can then be surface treated.

In a preferred embodiment of the embossing method of the leather and semi-finished products of the invention, the further surface treatment is sprayed with a wax or oil emulsion which improves filling and ironability of the cheek prior to further treatment and spraying with a binder which is a colorless finish. with the addition of a crosslinking agent to improve adhesion, abrasion and abrasion resistance. Subsequently, a water-dilutable emulsion gloss is fixed, and the final ironing is carried out at a certain pressure / temperature ratio, thereby achieving a gloss increase.

The advantages of the embossing method for the leather articles and raw leather semi-products according to the invention are in particular to achieve a characteristic and unusual appearance in combination with excellent utility properties, such as abrasion and abrasion resistance of the products.

- 1 GB 283220 B6

Exemplary embodiment

Non-iron tannins, natural trowel, intended as a semi-finished product for the production of ladies' handbags, bags, resp. purses are treated by face engraving, in which the artwork is engraved on the obverse side of the leather using special tools. Subsequently, a transparent liquid paint is applied by hand with the brush to the desired shades on the face side. For greater color contrast, better filling, and better cheekability, the face is sprayed with FI-53 wax emulsion before further treatment. This coating is covered with a binder spray, a colorless finish consisting of water-dilutable polyurethane dispersions with the addition of a cross-linking agent, for perfect adhesion of paint and varnish and increasing the abrasion and abrasion resistance of the material. The process according to the invention is completed with a water-dilutable emulsion gloss fixation, which is polished by final ironing, in the ratio of the required pressure and temperature.

Industrial applicability

The method of embossing the leather products and semi-finished products of raw leather according to the invention can be used especially in the manufacture of women's handbags, various bags, wallets, etc., and also for surface treatment of any leather products or semi-finished products of raw leather, requested.

Claims (2)

Method for embossing leather products and semi-finished products of raw leather, characterized in that their face side is at least partially treated by engraving, and then, prior to further surface treatment, dyeing, for example with a brush, tampon, spatula, spraying or dipping . A method of embossing leather articles and semi-finished products according to claim 1, characterized in that in a further surface treatment the face side is waxed or waxed, the binder is sprayed, the emulsion gloss fixed, and the final ironing.