Structure and spinning of composite yarn based on the multifilament spreading method using a modified ring frame

Abstract

This research work describes a new technique for producing staple fiber core-filament wrapped composite yarn, with the help of an innovative multifilament spreading method, using a slightly modified ring frame. The purpose is to develop an efficient and economic process for spreading the multifilament uniformly, to realize and improve the wrapping of the multifilament around staple core. Scanning electron microscopy was used to study the role of micro grooves’ dimensions in the formation of the multifilament layer and related effects on cover spun yarn properties. A modified ring frame was used to make 48 tex (12 Ne) composite yarn, which was compared to a similar composite yarn made on a conventional ring frame, for the tensile and hairiness properties. It was concluded that this mechanical spreading method can be used to increase the spinnability for short staple fibers and to overcome the problems associated with other spreading techniques and also can help to improve the breaking extension and hairiness properties of the composite yarn without the decrease of yarn tenacity.