Silane tanned leather dyeing retanning silica gel plain filling leather making method

Abstract

The invention discloses a silane tanning dyeing retanning silica gel tabby filling tanning method. The method comprises the steps of silane softening chromium-free retanning filling fatliquoring deep dyeing, silane chromium retanning filling fatliquoring, high-temperature surface dyeing and fixed mold prevention. According to the method, water is not drained midway, and the big difficult problem of the loose grain of leather can be solved effectively. Traditionally tanned wet blue leather and scytoblastema which is subjected to loose grain can also be plumped back and fully filled and leveled up, prepared to-be-coated scytoblastema is flat and fine in grain surface, resistant to folding and compression and good in resilience, and the leather quality is upgraded and changed from ungraded to excellent. Meanwhile, the method is simple and stable to operate, the scytoblastema out time is short, the production cycle can be shortened greatly, subsequent leather milling time is reduced, and the time of the whole process is greatly shortened to 30-50% compared with the traditional process. According to the method, water and energy can further be saved, emission reduction is achieved, washing and water drainage are not conducted midway, and water usage and sewage discharge are reduced by 80% or above.

Description

technical field [0001] The invention relates to the field of leather, in particular to a "one-pot cooking" tanning method for water-saving, emission-reduction, dyeing, retanning, silica gel plain weave filling of silane tanned leather. Background technique [0002] As one of the traditional industries, the tanning industry has always benefited the people's livelihood and contributed to the revitalization of the national economy. However, due to the limitation of scientific and technological level, its insurmountable disadvantages such as high energy consumption, high water consumption, and high pollutant discharge are becoming more and more serious. Seriously affect the sustainable development of the industry. Under the current trend of vigorously advocating water saving, emission reduction, energy saving and environmental protection, the traditional tanning concept, corresponding tanning materials and tanning technology will also usher in historical opportunities and flouris...

AI Technical Summary

Problems solved by technology

However, at present, the water-soluble organic polymer bridged polysilsesquioxane precursor is mainly aimed at normal leather. As described in the above-mentioned patented technology, although it has obvious advantages compared with the traditional tanning process, it is not suitable for the existing loose surface. Leather with quality problems cannot be well filled