Finishing method for manufacturing yellowing resisting patent leather

Abstract

The invention relates to the technology field of a method for finishing leather, and provides a finishing method for manufacturing yellowing resisting patent leather. The finishing method comprises the following process steps in order: ironing crust leather, grinding surface, grinding back, mending blemishes, grinding surface, blowing ash and cleaning surface, carrying out spaying for once, carrying out roller coating for once, carrying out ironing, carrying out the roller coating for twice, and carrying out the roller coating for twice, wherein the roller coating steps are carried out with yellowing resisting materials. According to the physical mode provided by the invention, the yellowing resisting materials can effectively penetrate and be attached to a crust leather surface structure, so the yellowing resisting coating is effectively formed on the crust leather surface, the yellowing resisting coating is not easy to be peeled, and the yellowing resisting function of the crust leather is effectively realized. The method has the advantages of simple process steps and operation convenience, and the finishing method is suitable for large-scale production; the yellowing resisting materials selected for the coating have simple compositions, and do not contain unnecessary chemical components, so that damage to other performances of the crust leather caused by unnecessary chemical components is avoided; accordingly, a finished product leather processed by the method has original leather performances and yellowing resistance at the same time, so that usage demands of the patent leather are satisfied, and the practicality is high.

Description

technical field [0001] The invention relates to the technical field of leather finishing methods, in particular to a finishing method for making yellowing-resistant patent leather. Background technique [0002] For light-colored patent leather, there is a common problem, that is, it is easy to yellow. The yellowing of objects is related to light, temperature, air and chemical substances in contact with it. For daily-used patent leather products, light is the main influence. Factors, ultraviolet rays in the sun can change some structures in the molecule, resulting in the production of chromophoric groups and auxochromic groups, resulting in yellowing. Yellowing is the result of changes in the structure of patent leather materials, not only affecting its appearance and sensory properties , is also one of the signals of its performance degradation. Contents of the invention [0003] Therefore, in view of the above-mentioned problems, the present invention proposes a coating ...

AI Technical Summary

Problems solved by technology

[0002] For light-colored patent leather, there is a common problem, that is, it is easy to yellow. Yellowing of objects is related to light, temperature, air and chemical substances in contact with it. For daily-used patent leather products, light is its main influence. Factors, ultraviolet rays in the sun can change some structures in the molecule, resulting in the production of chromophoric groups and color-aiding groups, resulting in yellowing. Yellowing is the result of changes in the structure of patent leather materials, not only affecting its appearance and sensory properties , is also one of the signals of its performance degradation