Suede leather production method

Abstract

The invention provides a suede leather production method. Suede leathers are obtained through performing water leaching, ash leaching, ash removal, acid leaching, tanning, uniform turning, retanning,neutralization, dyeing and degreasing and drying on leathers. The retanning process comprises the following steps: after 2% of acid-resistance acrylic acid and 0.5% of acid-resistance grease are usedfor treatment, pH is controlled as 3.0; and a chromium retanning agent is added for treatment. The neutralization process comprises the following steps: 150% of water, 2% of sodium formate and 2% of neutralization auxiliary are added; a rotating drum is rotated by 60 min; then, water washing is performed by 10 min; and the temperature is increased to 60 DEG C. The dyeing and greasing process comprises the following steps: 150% of water with a temperature of 40 DEG C, 1.5% of dicyandiamide tannin, 2% of amphoteric synthesized tannin, 4% of tannin extract and 2% of dye are added; the rotating drum is rotated by 50 min; 2% of sulfonated oil, 2% of phosphate and 5% of synthesized oil are added; the rotating drum is rotated by 50 min; 0.8% of formic acid is added; and the drum is stopped by 3 hours. The retanning, neutralization and greasing processes are improved to improve uniformity, hand feel, fullness, reading-writing effect and mercerization of the suede leathers.

Description

technical field [0001] The invention relates to the field of leather making, in particular to a production method of suede leather. Background technique [0002] Suede is a general term for leather that has been ground to a fine suede, with some or all of the grain on the front nubuck and the suede on the flesh side. Pigskin, cowhide, and sheepskin are mostly made by chrome tanning. Because suede leather is only sanded and dyed without chemical coating, it has excellent air permeability and good softness. The suede products are comfortable to wear and have good hygienic performance, so they are widely used in the production of leather shoes, leather garments, leather bags, gloves, etc. [0003] Cowhide is one of the most commonly used leather raw materials in production and life, because its price is relatively cheap, the source is abundant, and the leather products produced from cowhide leather are durable and popular among consumers. Cowhide suede is also a raw material ...

AI Technical Summary

Problems solved by technology

[0005] This application provides a suede production method to solve how to modify the suede process to provide suede with fine and uniform fluff, hand feel, fullness, read-write effect and mercerization. , to meet people's pursuit of suede performance