Study on the Application of Leather Auxiliaries in the Leather Industry
Abstract:The traditional dehairing process which used sodium sulfide produced lots of high pollution waste and emission .In this paper, the application of sodium metasilicate and pancreatin during dehairing process is researched. Through single factor tests, different results for the variation of the time for soaking, concentration of the pancreatin, PH of the tanning liquor and the concentration of the sodium metasilicate are discovered. Through four factors and three levels orthogonal, the best experimental conditions have been found: time for soaking is 7h; concentration of the pancreatin is 0.4%; PH of the tanning liquor is 7.9; concentration of the sodium metasilicate is 0.1%.
Keywords:Leather; Dehairing; Sodium metasilicate; Pancreatin