Production technology for improving smoothness and fineness of grain surface of leather

Abstract

The invention relates to a technical field of tanning chemistry and engineering, and provides a production technology for improving the smoothness and fineness of the grain surface of leather. According to the production technology, the grain surface of the cow leather obtained through the production technology is smooth, fine, tiny in pores, attractive, elegant, high in product grade, good in physical and mechanical properties, soft and comfortable in hand feeling and good in resilience, and in addition, the production technology is simple and easy to realize, appropriate in production cost and suitable for mass production and use. The production technology for improving the smoothness and fineness of the grain surface of the leather sequentially comprises the following steps of carryingout splitting on limed hide, carrying out deliming, softening and pickling, carrying out tanning, carrying out wringing and shaving, carrying out softening, carrying out retannin, carrying out neutralizing, carrying out filling, carrying out greasing, carrying out overdyeing and carrying out post treatment, wherein the tanning process adopts an aluminum-contained multi-metal tanning agent and a chrome tanning agent for co-tanning, the retanning process adopts a liquid betel nut tannin extract, an aldehyde tanning agent, an amphoteric synthetic tanning agent and the aluminum-contained multi-metal tanning agent for retanning, and the filling process adopts a micromolecular acrylic resin retanning agent, a phenolic condensation compound, a naphthalene sulfonic acid condensation compound, a synthetic greasing agent, sulfonated natural oil and a plant tannin extract 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, e