In order to investigate the color mixing characteristics of linen/ colored polyester wrapping composite yarn and the influence of wrapping twist on color mixing effect and composite yarn properties, using colored polyester interlaced yarns as the outer wrapping yarns and the linen bleached yarn as the core yarns, composite yarns with different colors and wrapping twists were spun. The appearance characteristics of the composite yarns were analyzed, and the tensile properties, unevenness, yarn faults and hairiness of the composite yarns were tested and comparative analyzed. The results show that the composite yarns have the characteristics of bast color, wrapping twists are great at the slubs, presenting a light color, and twists are small at the thin places of core linen yarn, presenting a deep color, the composite yarn shows weak segment-colored effect along the longitudinal direction of the composite yarn. The color mixing texture and color depth of the composite yarn can be changed by changing the wrapping twist. The wrapping combination can improve the breaking strength and elongation of linen yarn, enhance yarn unevenness and reduce yarn defects and hairiness. When the wrapping composite yarn is stretched, non-simultaneous fracture may happen between the core yarn and the outer wrapping yarn, but the probability of occurrence will decrease as the wrapping twist increases.
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