Abstract
In this study, we investigated the effects of some navelproperties such as form, number of grooves, fluted insert, material, lengths ofceramic part and grooves on rotor yarn spun from 100% cotton waste. Ten navelswith different technical properties were used for spinning coarse (49-tex)rotor yarn. Finally, by considering the raw material characteristics, resultsregarding the relations between navel properties and rotor yarn quality wereput forward. Some information concerning the selection of the proper navel forthese conditions was also given. According to the results, the best values forevenness and imperfections were obtained by using plain steel navel (SGF);spiral ceramic navel (KS) showed a better performance than SGF for theproperties directly related to deformation given to yarn, such as hairiness,tenacity and elongation. These results are attributed to the minimumdeformation given by these navels to yarn spun from cotton with very high shortfibre and impurity content.
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