White anti-yellowing cow split leather processing formula, processing technology and equipment

Abstract

The invention discloses a white anti-yellowing cow split leather processing formula, processing technology and equipment, and relates to the technical field of leather processing.The processing formula comprises, by weight, 12-20 parts of high-viscosity polyurethane resin, 2.3-5.8 parts of yellowing-resistant ultra-soft comprehensive resin, 9-12 parts of ethylene glycol, 0.1-1.5 parts of salicylic acid, 1 to 5 parts of a pH regulator, 0.01 to 0.05 part of zinc oxide, 0.02 to 0.06 part of white carbon black, 0 to 10 parts of a surfactant, 0.8 to 3.2 parts of 3-mercaptopropionic acid, 30 to 70 parts of water and 0.05 to 0.08 part of a thickening agent. Zinc oxide and white carbon black are used as the matting filler, after the matting filler is uniformly dispersed, light rays can be refracted, the light rays are prevented from irradiating the cow split leather, meanwhile, 3-mercaptopropionic acid and salicylic acid are used as the anti-ultraviolet agents, ultraviolet rays can be easily absorbed through cooperation of the 3-mercaptopropionic acid and the salicylic acid, ultraviolet rays irradiated on the cow split leather are reduced, the yellowing speed of cow split leather products is reduced, and the yellowing resistance improvement effect is good.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a processing formula, processing technology and equipment for white anti-yellowing bovine split leather. Background technique [0002] There are various tanning methods of leather. According to different tanning methods, leather can be divided into: vegetable tanned leather, chrome tanned leather, oil tanned leather, aldehyde tanned leather, aluminum tanned leather and mixed tanned leather. At present, chrome tanning is widely used because of the advantages of shorter time, lower cost, soft texture of chrome tanned leather, less fading and shrinkage, and convenience for subsequent processing. Chrome tanned leather is generally blue-white, also known as wet-blue leather. Generally, wet-blue leather can be processed into various styles of finished leather. [0003] If the light time is long, it is easy to yellow the white cow split leather products. At the same time, th...

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Problems solved by technology

[0003] If the light time is long, it is easy to yellow the white cow split leather products. At the same time, the ultraviolet rays in the sun can change some structures in the molecules, resulting in the production of chromophoric groups and auxochromic groups, resulting in yellowing. Now, in order to prevent yellowing The spraying liquid is designed, but the anti-yellowing is not ideal. At the same time, the spraying structure can only be sprayed through the cooperation of multiple sets of equipment at the same time, and the cost of the spraying structure is high.

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