Structure and tensile characteristics of rotor-spun composite yarns

For discovering the relationship between structure and tensile properties of rotor-spun composite yarns,the yarn structure and tensile characteristics were investigated by theoretical and experimental methods,and the morphology of yarn breakage ends were observed by the Questar hi-scope video microscope system.The results indicate that the structure of composite yarns depends on the difference between the filament tension and the tension of staple fiber strand.By controlling the filament over-feed ratio,different kinds of composite yarns can be produced under the constant conditions of normal rotor spinning.The tensile process and breakage ends morphology of composite yarns are related to the yarn structure.Compared with the normal rotor-spun yarn,the tensile properties of composite yarns are improved.