SETTING OF WOOL FABRICS

Experimental data is presented on shrinkage by soaking, in warp direction, of wool fabrics set in hot water, and correlations of setting temperature, soaking temperature, and shrinkage by soaking are disecused. Different tendencies in shrinkage at wet state and dry state after soaking at various temperatures and that they depend on setting temperature were observed. Sudden increase in shrinkage above took place from 75 to 85°C in soaking temperature, and it was especially remarkable in day state. Shrinkage and setting temperature had linear relation in wet state, but, often in dry state, had a minimum value in shrinkage. The latter case is due mainly to shrinkage during setting in water of high temperature. These phenomena were analysed from a set of single fibers of wool, their stress relaxation and stretch by swelling in soaking, and their recovery in drying.