Abstract
The initial stage of liquid absorption in unsaturated nonwoven fabrics (e.g. dry wipes, absorbent materials and hygiene products) is an unsteady-state fluid flow. For the purpose of the engineering design of these nonwoven products, there is a need to predict the unsteady-state fluid flow in both homogeneous anisotropic nonwoven structures and heterogeneous patterned nonwoven fabrics having a dual-scale porosity structure. In this paper, the unsteady-state liquid wicking in homogeneous anisotropic nonwoven fabric structure has been modeled, and the relationship between unsteady-state liquid absorption in patterned nonwoven fabrics and its structural parameters has been established based on the fabric structural parameters.
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