Research on evenness of section-color yarn

Section-color yarn is a kind of fancy yarn, which has discontinuous color changing on yarn axial direction and meets the needs of the market. Therefore, it is of high added value. In the section-color yarn spinning, one white roving is feeding into the back roller continuously, and one color roving is feeding into the middle roller discontinuously, and corresponding discontinuous color change on yarn axial direction can be produced. Compared to the common ring spun yarn, the evenness of section-color yarn is worsening seriously due to its spinning mechanism. Therefore, in this paper, the evenness of section-color yarn is analyzed. It is shown that the feeding deviation of color roving is the main possible reason for the worsening evenness of section-color yarn. Then, the corresponding measure for improving section-color yarn evenness is taken by modifying the feeding time of the back roller, and the corresponding modified spun yarn evenness is measured. It is shown that the section-color yarn evenness can...