Preparation method of vegetable tanned leather-like regenerated leather and product

Abstract

A preparation method of vegetable tanned leather-like regenerated leather is characterized by comprising following steps: (1) crushing and coarsen-treating a leftover material of vegetable tanned leather to prepare leather fiber; (2) placing the leather fiber in a stirring barrel with addition of common additives, grease, salt, a dye, an adhesive and water by 2-5 times for preparing a mixture through fully stirring; (3) wringing, squeeze-flattening, heat-drying and polishing the mixture to obtain a leather blank; (4) coloring the leather blank, including steps of coating the surface of the leather blank with a resin mixture and drying the leather blank, wherein the resin mixture includes a common dye, an additive and resin, so that the surface of the leather blank has a transparent sense; (5) shaping and bar-cutting the dyed leather blank, wherein the dyed leather blank is shaped and the color of the surface of the leather blank is darkened by heating the dyed leather blank in a die to 50-100 DEG C and rolling or pressing the dyed leather blank for shaping the leather and deepening the surface color of the leather, and (6) cutting the treated leather to obtain leather strips.

Description

technical field [0001] The invention relates to a regenerated leather, in particular to a method for preparing regenerated leather imitating tree paste leather and its products. Background technique [0002] The regenerated leather preparation process in the prior art generally uses branded tanned leather blocks or leather fibers from tanneries, leather products factories, etc. as the main raw material, which is sequentially crushed, roughened, and adhesives, dyes, and a large amount of water are added. After stirring, squeeze water, flatten, dry, flatten, grind and other steps to make the skin embryo, and then process the surface of the skin embryo, such as spraying paint or coating PU film, etc., to obtain the finished product. However, the leather made by this process has many impurities on the surface of the leather embryo, the adhesive is not refined enough, and there are many spots, so it must be fully covered with opaque color treatment. The surface color of the leat...

AI Technical Summary

Problems solved by technology

This kind of leather mainly has the following disadvantages: 1. It is not environmentally friendly: because the chemical tanned leather uses its leftovers or leather fibers as the main raw material; 2. Because it is processed with paint and PU film, the surface of the product does not have a sense of transparency; 3. The setting degree is poor, and the leather material will rebound if it is heated, pressurized or rolled with a mold; 4. Rolling or pressing after heating with a mold cannot achieve natural burnt or black edge effects; at the same time, the existing technology Regenerated leather, no matter its whole roll or sheet, is usually heated and rolled by any mold, and it can only achieve the general shape of the leather, but cannot achieve the effect of darkening the surface of the leather at the same time, so that it can only have the effect of branded tanned leather The technical level of regenerated leather limits the application fields of regenerated leather