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Application of polyurethane dye in leather dyeing process
Author(s): 
Pages: 15-18
Year: Issue:  1
Journal: China Leather

Keyword:  polyurethane dyedyeingdyeing mechanismdyeing uptakepermeation;
Abstract: On the basis of previous studies,polyurethane red dye PUB was synthesized. Wet blue leather shavings were used in dyeing experiment. By analyzing the data of dye uptake,the optimum progress of the polyurethane dyes were as follows: temperature is 50 ~ 60℃,p H is 3. 0 ~ 4. 0,and the dye uptake is 90% or more in 20 min. And the dyeing mechanism of polyurethane dyes PUB was studied with Fourier transform infrared spectroscopy and thermal analysis. The permeation experiment of PUB in the sheep leather dyeing process was studied. The result show PUB could. permeat into the leather after 60 min and the performance of resistance to dry and wet rubbing and the resistance transference improves a lot.
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