A production process for improving the flatness and fineness of leather grain

Abstract

The invention relates to the field of tanning chemistry and engineering technology, and provides a production process for improving the flatness and fineness of the grain surface of leather. The bovine leather obtained through the production process has a smooth and fine grain surface, small pores, elegant appearance, high product grade, and physical and mechanical advantages. Good performance, soft and plump hand feeling, good resilience, simple and easy to implement production process, appropriate production cost, suitable for mass production and use; the production process for improving the flatness and fineness of leather grain includes the following steps in turn: → Deliming, softening, pickling → Tanning → Squeezing, smoothing → Softening → Retanning → Neutralization → Filling → Fatliquoring → Color registration → Finishing, among which aluminum-containing multi-metal tanning agents and chrome tanning agents are used for tanning Co-tanned, retanned with liquid betel nut extract, aldehyde tanning agent, amphoteric syntan and aluminum-containing polymetallic tanning agent for retanning, filled with small molecule acrylic resin retanning agent, phenolic condensate, naphthalenesulfonic acid condensation additives, synthetic fatliquors, sulfonated natural oils and vegetable tanning agents for filling.

Description

technical field [0001] The invention relates to the technical field of tanning chemistry and engineering, in particular to a production process for improving the fineness of leather grain. Background technique [0002] The fineness of the grain of the leather plays a vital role in the appearance and feel of the leather. The leather with a fine grain has a beautiful appearance and a smooth feel, which can improve the grade of the leather. Especially for lightly painted and aniline-dyed leather, the grain level and fineness of leather are one of the key factors to determine the grade of leather. In the current process, the filling and drying processes are likely to cause rough leather grain and large pores, especially when the amount of vegetable tanning agent is large, it is easy to produce problems such as rough surface. Contents of the invention [0003] Therefore, for above-mentioned problem, the present invention proposes a kind of production technique that improves le...

AI Technical Summary

Problems solved by technology

In the current process, the filling and drying processes are likely to cause rough leather grain and large pores, especially when the amount of vegetable tanning agent is large, it is easy to produce problems such as rough surface