The unfolding of fabric creases induced by humidity is an issue of the capillary forces driving the deformation of materials, related to the interactions of textiles with moisture. Most are about complex moisture transport dynamics in fibrous assemblies. However, the effect of humidity on the crease recovery course of fabric with multiscale structure is not clear. Therefore, the fabric crease unfolding over time in different humidities was explored. In this study, theoretical analysis based on Burger’s viscoelasticity model and experiments on the crease recovery were conducted. Then the evaluation indices, that is, the crease recovery ratio ([Formula: see text]) and the recovery gradient ratio ([Formula: see text]), which were obtained from fitting coefficients and constructed in the form of the theoretical equation, were established. They were then combined with the fabric porosity ( P) at yarn scale, to demonstrate the capillary forces driving the deformation of materials, that is, crease unfolding humidity-induced. The results show that the higher the [Formula: see text] or [Formula: see text] value, the greater capillary forces promoting the crease to recover under the same humidity changes. The smaller the P, the more easily the contacted structures move, and the crease recovers better. In conclusion, the deformations induced by capillary forces are studied in a form of a crease unfolding at a humidity change. The results obtained in this study lay a certain foundation for further research on the mechanism and theoretical model of the moisture on fabric crease recovery.

中文翻译：

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织物折痕回复角松弛行为的湿度依赖性

湿度引起的织物折痕的展开是毛细力驱动材料变形的问题，与纺织品与湿气的相互作用有关。大多数是关于纤维组件中复杂的水分传输动力学。然而，湿度对多尺度结构织物折痕恢复过程的影响尚不清楚。因此，研究了在不同湿度下随着时间的推移织物折痕展开的情况。本研究进行了基于Burger粘弹性模型的理论分析和折痕恢复实验。然后根据拟合系数求出评价指标，即折痕恢复率（[公式：见正文]）和恢复梯度比（[公式：见正文]），并以理论方程的形式构建，成立了。然后将它们与纱线尺度的织物孔隙率 (P) 相结合，以证明驱动材料变形的毛细管力，即湿度引起的折痕展开。结果表明，在相同的湿度变化下，[公式：见正文]或[公式：见正文]值越高，促进折痕恢复的毛细管力越大。 P越小，接触结构越容易移动，折痕恢复得越好。总之，毛细管力引起的变形以湿度变化时展开的折痕的形式进行研究。本研究取得的结果为进一步研究水分对织物折痕回复的机理和理论模型奠定了一定的基础。