A kind of production process of high absorption chrome tanned leather

Abstract

The invention discloses a production technology of high-absorbability chrome tanned leather. The production technology comprises following steps: raw materials are softened, and are restored to be in the fresh skin state, not-required components in fur machining are removed, according to a full-depth limed skin, a first layer and a second layer are separated through the splitting working procedure, and the second limed skin is put into a tanning drum to be subject to deliming, softening and pickling; 80% of water is added, and the temperature is controlled to 22 DEG C; 8% of salt is added, and rotating is carried out for 10min; 150% of water is continuously added, and the temperature is controlled to 45 DEG C; 0.6% of formic acid is added, and rotating is carried out for 30 min; 2% of glyoxylic acid is added, and rotating is carried out for 30 min; 0.4% of sulfuric acid is added, rotating is carried out for 120 min, and the PH value is controlled to range from 3.0 to 3.2 until core penetrating is achieved; 4% of a chrome tanning agent is added; 0.15% of a mildew preventive is added, and rotating is carried out for 180 min; 0.45% of a leather basifying agent is added, rotating is carried out for 360 min, and the PH value is controlled to range from 4.0 to 4.2; the composite mixing technology is achieved; household leather is dyed; emulsion is oiled.

Description

technical field [0001] The invention relates to a production process of high-absorption chrome-tanned leather, which belongs to the production process of furniture leather. Background technique [0002] In this era of increasing emphasis on ecology and environmental protection, the leather industry will face severe challenges. In the domestic leather industry, the genuine leather mark eco-leather certification is actively promoted, and the content of related chemical substances that may exist in eco-leather must be strictly controlled within a limited range. Inside. [0003] The chrome-tanned home leather in the prior art uses a large amount of chrome tanning agent, and although the traditional chrome-tanning method has an irreplaceable position, it still has deficiencies. Chromium is a non-renewable resource. Although trivalent chromium is used for chrome tanning, trivalent chromium can be converted into hexavalent chromium under certain conditions. Hexavalent chromium is ...

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