Preparation method of soft leather dyed by wax

Abstract

The invention relates to a preparation method of leather, and provides a preparation method of soft leather dyed by wax, the method is capable of reducing production cost, reducing environmental pollution and reducing energy consumption, and comprises the following steps: 1) preparing blue wet leather; 2) performing machinery wet treatment; 3) tanning and dyeing; 4) drying for arrangement and 5) coating.

Description

technical field [0001] The invention relates to a method for preparing leather, in particular to a method for preparing soft leather dyed with oil, wax and water. Background technique [0002] Oil wax water-dyed soft leather is one of the high-end leather materials. It is a special glossy leather effect formed after the top layer of cowhide is polished, oiled and waxed. It maintains the natural leather texture and is an antique artistic effect. fashionable leather craft. Generally, water-dyed leather is directly made into finished cowhide after dyeing, which can better maintain the original texture, but because it is not painted or embossed in the later stage, the requirements for raw leather are very high, and poor raw leather cannot be used for finishing. Improve the quality and grade of finished leather. [0003] The preparation method of traditional soft leather generally includes: preparation of wet blue leather, wet processing, retanning and dyeing, horse riding ove...

AI Technical Summary

Problems solved by technology

Generally, water-dyed leather is directly made into finished cowhide after dyeing, which can better maintain the original texture, but because it is not painted or embossed in the later stage, the requirements for raw leather are very high, and poor raw leather cannot be used for finishing. Improve the quality and grade of finished leather

[0003] The preparation method of traditional soft leather generally includes: preparation of wet blue leather, wet processing, retanning and dyeing, horse riding overnight, hanging to dry, softening, softening treatment, finishing treatment and other steps. In these process steps, The retanning and dyeing process has a great influence on the performance of leather. The traditional retanning and dyeing process is "rinsing→retanning→neutralization→filling, dyeing→fatliquoring→coloring". Dyeing, retanning and filling are carried out in the same bath, mutually Influence, affect the dyeing effect, the dyeing accuracy is average, the color fullness is poor

And adopt traditional preparation method, need to use more dyestuff, economic cost is higher

In addition, due to the need to use more chemical raw materials in the traditional retanning and dyeing steps, a large amount of difficult-to-treat dyeing wastewater is discharged, which brings serious environmental pressure

The traditional retanning and dyeing process is adopted, and the final coloring treatment is required. More dyes and fixatives are used. The dyeing accuracy of leather is average, the color fullness is poor, and dyeing defects are prone to occur.

The traditional retanning and dyeing process is cumbersome, consumes a lot of energy, requires more chemical raw materials, produces a large amount of dyeing sewage, and brings serious water treatment pressure