SOME FUNDAMENTAL THEORETICAL AND EXPERIMENTAL ASPECTS OF FABRIC CREASING

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Abstract
The influences of bending and shearing stiffnesses on textile deformations are discussed in the first part of the paper. The dependence of crease-recovery on the frictional forces between fibres and yarns as well as on fibre elasticity is discussed. The influence of setting treatments on crease-recovery and on other properties is also discussed. An experimental investigation of the crease-resistance and crease-recovery for different cellulosic fabrics makes up the main part of the paper. Resistance to bending was measured as a function of the bending diameter and the rate of bending. From the results thus obtained, a method was developed for measuring the permanent recovery of fabrics bent between gauges of various thicknesses to control the degree of strain placed on the specimens. The permanent recovery angles were plotted as a function of the cloth thickness and the inverse of the bending diameter. The per cent integrated angle of recovery for all degrees of wrinkling under the conditions of testing was calculated and used in comparisons. Factors such as bending diameter, vibration, humidity change, and time of pressing were examined for cotton and rayon samples.

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