Bicomponent fibres consisting of two components with different melting points can be used for the production of nonwoven fabrics. In this study, computational analyses onthe thermal bonding behaviour of sheath-core type bicomponent fibres was performed. The bonding point was assumed to consist of two fibres which are aligned perpendicular to each other. Numerical simulations for the flow of sheath polymer were performed, simplifying the three-dimensional configuration of the bonding point into two cases of two-dimensional flow, i.e. the flow along, and perpendicular to, the fibre axis. According to these models, the Navier-Stokes equation for viscous incompressible flow with free surface was solved in two dimensional Cartesian coordinates. Surface tension was assumed to be the only driving forcef for the flow.
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