A Finishing Method for Solving Crude Leather Discoloration

Abstract

The invention relates to the technical field of leather making chemistry and engineering, and provides a coating and decoration method for solving crust leather cross color. Oxidized polyethlene wax emulsion is introduced into a coating and decoration agent, and the coating and decoration agent is used for coating the surface of crust leather to show a natural fog luster state; during high-temperature ironing, the wax agent migrates to the surface layer of a coating film along with the moisture volatilization; a waxed surface layer is formed with other ingredients in the coating and decoration agent; a good shielding effect is achieved; the crust leather with the uniform and consistent surface color is obtained; meanwhile, the dispersion degree of the pigment paste in the coating and decoration agent can be increased through the oxidized polyethlene wax emulsion; the coloring intensity is improved. By using the coating and decoration method for solving crust leather cross color, a crust leather product with the advantages of uniform particle surface color, comfortable hand feeling, exquisite surface and aniline coating and decoration effects can be obtained; in addition, the operability is very high; the production efficiency is high; the crust leather accumulation is avoided; the economic loss is reduced; the practicability is high.

Description

technical field [0001] The invention relates to the technical fields of tanning chemistry and engineering, in particular to a finishing method for solving brown leather color spots. Background technique [0002] Color flower, also known as color defect, refers to the patch marks with different color shades on the leather surface after dyeing, which is a common defect in crust leather. The main reasons for the color flower are as follows: 1. The state of the crust leather before dyeing is uneven, the looseness of the collagen fibers is inconsistent, the fiber is too tight, the dye permeability is poor, and there are more dyes bound to the surface of the crust leather, and the color will be biased. Deep; 2. There is a poor position in the crust leather. After being stretched, the area of ​​the loose part will be stretched to a large extent, causing the surface color to disperse and become lighter. The area of ​​the tight part will not expand much, and the surface color will ch...

AI Technical Summary

Problems solved by technology

The aforementioned traditional finishing method uses a finishing agent containing a large amount of resin and pigment paste for repeated coating to carry out concealing and remedial treatment. Although it can solve the problem of brown leather color, but the proportion of resin and pigment paste in the finishing agent formula is large, the coating Too many times of coating will not only lead to thick coating, cover up the natural grain of the crust leather, reduce the texture and grade of the crust leather, but also complicate the operation, increase additional costs, and have shortcomings such as coating process formula and complicated operation process, so it is not suitable for large quantities. Quantitative production and use, low practicability

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