Warp knitting is a group of yarns (warp yarns) winding and knitting in the direction of cloth. Warp knitting machines generally arrange needles in a flat width. Each needle of many crochets drives a yarn to be wrapped and knitted into a set with yarns adjacent to the left and right.
Warp knitted fabrics are usually made of polyester, nylon and polypropylene filaments, as well as cotton, wool, silk, linen, chemical fibers and their blended yarns. Ordinary warp knitted fabrics are usually made of chain weave, warp flat weave, warp satin weave and warp oblique weave. There are many kinds of fancy warp knitted fabrics, such as mesh fabrics, Terry fabrics, pleated fabrics, plush fabrics and weft-lining fabrics. Warp knitted fabrics have many advantages, such as good dimensional stability, straightness, small dispersibility, no crimping, good air permeability and so on. Lateral extension, elasticity and softness are inferior to weft knitted fabrics.