Models for basic warp knitted fabrics Part I: Chain stitches and their applications on marquisette and weft-inserted warp-knitted fabrics

Chain stitches are basics structures to obtain a group of net grounds in warp knitting such as marquisette, curtain-net ground and full-width weft-inserted fabrics. These net grounds are, in turn, used as technical fabrics as well as household goods. Modeling of warp-knitted fabrics started with some basic geometrical models and it was continued using non-uniform basis-spline (NURBS) curves and surfaces. There were discontinuities in the loop parts in the early models and the NURBS models needed some control points from some sources. In this work instead of using NURBS curves, an attempt is made to model warp-knitted fabrics using known curves and continuities in loop parts are attained as much as possible. First of all, open chain stitch is modeled. Closed chain stitch is obtained by changing some parts of open chain stitch model. Models then applied to marquisette, curtain-net ground and full-width weft-inserted warp-knitted fabrics are presented. Models created are drawn to scale by using 3DS-Max computer graphical program. It is seen that the shapes obtained by the models are similar to those which can be observed on real samples.