Leather processing methods, leather and leather products

Abstract

The invention discloses a leather processing method, comprising the following steps: wet blue leather squeezing, smoothing, weighing→rewetting→neutralization→filling and dyeing→grain surface filling→dry finishing①→brushing cracked resin→dry finishing② → water return → fatliquoring → finishing; the grain surface filling process includes adding 50-100% of 35-45°C water, 0.5-2.5% polymetallic complex in the drum, and rotating for 10-30min; then adding 2 ‑6% plant extract, 1‑3% maleic anhydride polymer, rotate for 30‑60min; finally add 0.5‑1.5% formic acid, rotate for 20‑40min, adjust the pH of the bath to 3.6‑3.8, drain, Washing; the leather of this application is soft and light to the touch, the leather body is soft, plump and elastic, the cracks on the leather surface are naturally rough, plump and protruding, and the three-dimensional effect is strong. It can be seen that the disability and defects are obviously reduced, and the leather yield is high and the utilization rate is high.

Description

Technical field [0001] The invention relates to the technical field of leather chemistry and leather engineering, in particular to leather processing methods, leather and leather products. technical background [0002] After raw hide is treated with alkali, acid, enzyme, etc. to remove hair, non-collagen fibers and other useless things in leather making, and then tanned with basic chromium salt, the in-process products with lake blue appearance are called blue wet leather. Wet blue leather generally suffers from disabilities and defects, which are brought by raw hide himself, because a series of disabilities and defects, such as biting, scratching, ringworm, branding, lying on the fence, stabbing and scratching, bloody tendons and so on, will inevitably occur during the growth of animals. The existence of these disabilities and defects will affect the appearance and utilization rate of leather, lower the grade of leather and lower the utilization rate of leather. Especially, low-...

AI Technical Summary

Problems solved by technology

[0003] By providing a leather processing method, the present invention solves the problem of many disabilities and large defects in the low-grade wet-blue leather in the prior art, and realizes the effect of producing natural and uniform cracks on the grain surface of the leather