A chrome-free wet-state dyeing and finishing process for the preparation of cattle shoe upper leather based on iron-zirconium-aluminum complexes

Abstract

The invention relates to the technical field of leather preparation chemistry and engineering, and provides a chromium-free hygrometric-state dyeing and finishing process for preparing cattle hide upper leather based on a zirconium, iron and aluminum complex. A zirconium, iron and aluminum complex tanning agent is adopted for chromium-free retanning on blank leather in the hygrometric-state dyeing and finishing process, the blank leather prepared through the hygrometric-state dyeing and finishing process for preparing the cattle hide upper leather based on the zirconium, iron and aluminum complex is fine and compact in grain side and plump, soft and elastic in leather body, the shrinkage temperature of the blank leather is higher than 90 DEG C, all physicochemical performance can meet the industry requirements, and good subsequent processing performance is achieved; according to the chromium-free hygrometric-state dyeing and finishing process for preparing the cattle hide upper leather based on the zirconium, iron and aluminum complex, in the implementation process, no chromium powder or chromium-containing material is used, the pollution of heavy metal chromium to the environment and the injuries of heavy metal chromium to human bodies are eliminated from the source, good cleanliness and ecology are achieved, and the process is a leather preparation clean production technology suitable for industrialization.

Description

technical field [0001] The invention relates to the technical field of tanning chemistry and engineering, in particular to a chromium-free wet-state dyeing and finishing process for preparing yellow cattle upper leather from an iron-zirconium-aluminum complex. Background technique [0002] The leather industry is a traditional industry with comprehensive advantages in China. It plays an important role in my country's economic construction, especially in foreign exchange earning through export. However, while the leather industry creates significant economic benefits, it also pollutes the environment, especially pollutants containing heavy metal chromium such as chromium-containing wastewater, chromium-containing sludge and chromium-containing solid waste, which are seriously polluted, difficult to handle, and The high cost of governance has become a huge obstacle restricting the sustainable development of the leather industry. In the column of chromium-containing waste in m...

AI Technical Summary

Problems solved by technology

[0004] At present, in the manufacturing process of cattle shoe upper leather, there are few studies on chrome-free wet dyeing and finishing process, mainly focusing on the chrome-free wet dyeing and finishing process based on vegetable tanning agents, but due to the combination of vegetable tanning agents and collagen The method is different from chrome tanning agents. In the current tanning environment that is mainly equipped with chrome tanning agents, the wet dyeing and finishing technology of vegetable tanning often faces many problems, such as long tanning time, poor softness, thick leather, rigid, The color is monotonous, the performance of leather is quite different from that of chrome tanned leather, and the follow-up processing is poor, making it difficult to promote and realize industrialization in factories.