New Process Technologies

Structural Design of textiles: Influence of Yarn and patterning on drying of knitted fabrics.

Saal A
Freitag, 13.09.2024, 09:00 - 09:25 Uhr

Wicking and drying are coexisting phenomenae in textiles and dominate their interaction with liquids. By altering the geometrical structure of the yarn and the knitted fabric in the textile productoin chain, textiles can be adapted to obtain desired properties without chemical surface modification and mixing materials.

Leon Pauly (DITF Denkendorf)
Lukas Maier (Institue for Chemical Process Engineering ICVT, University of Stuttgart)
In many processes and applications, the performance of textiles relies heavily on mass transport into and through them. Knitted fabrics are used for body-near worn garments due to their good drying properties for centuries. Prediction of knitted fabrics' effective transport characteristics can enhance development workflows and bring them to new applications. The idea is how we can affect the transport properties just by the textile structure in order to produce a functional monomaterial. In this presentation, we target in which range the geometry of the yarn (i.e. fiber fineness, fiber form, yarn fineness) and the knitted fabric (e.g. loop length, pattering) can be used to alter the functional properties of a fabric. We show both experimental and simulative approaches. Experimentally we examine vertical wicking in the yarn and drying of single yarns. In plane, we quantify how the horizontal wicking area corresponds with the drying rate in textiles. The experiments are discussed with simulations of transport in fibrous porous media. As a conclusion we present the parameters of the drying behavior of knitted fabrics and design rules for the fiber- and yarn-forming community.