Interaction study of micronaire value and staple length upon the spinning performance of MNH-93 cotton variety

Fibre characteristics cotton bales of different micronaire value having same staple length were sorted out from the mill stock and then various length groups having a gradual increase in micronaire value were selected. All these cotton samples were tested for the evaluation of fibre characteristics. The results pertaining to uniformity index revealed that differences in the mean values due to different levels of micronaire value and staple length were highly significant. While, significant differences were observed due to the interaction of micronaire value and staple length. In case of maturity ratio, highly significant differences were observed for different levels of micronaire value and staple length as, well as for their interaction. The results regarding fibre bundle strength were found highly significant for different levels of micronaire value and staple length as well as for their interaction. The results pertaining to fibre elongation revealed the highly significant differences for different levels of micronaire value as well as for their interaction. However, non-significant difference was observed in the mean values of fibre elongation due to different staple length levels. In case of trash, percentage, highly significant differences were observed for different levels of micronaire value and staple length as, well as for their interaction. The results pertaining to degree of reflectance were found highly significant for different levels of micronaire value and staple length as well as for their interaction. The results regarding degree of yellowness were found highly significant for different levels of micronaire value and staple length as well as for their interaction. For studying the spinning performance of cotton samples, the English count 20s (carded), was spun and tested along with the other yarn characteristics i.e. yam lea strength, count lea strength product, single yarn strength, yam elongation, rupture per kilometer, yarn unevenness, yam imperfections and yam hairiness. The results pertaining to nominal spinnability of yarn were found significant for different levels of micronaire value. Whereas, differences in the mean value due to different staple length levels and the interaction of micronaire value and staple length were observed highly significant. The results regarding yarn lea strength were found highly significant for different levels of micronaire value and staple length. Whereas, the interaction of micronaire value and staple length was observed significant. In case of count lea strength product, highly significant differences were observed for different levels of micronaire value and staple length. The results pertaining to single yarn strength were found highly significant for different levels of micronaire value and staple length. Where as, the interaction of micronaire value and staple length was observed significant. The results regarding yarn elongation were found highly significant for different levels of micronaire value and staple length. Whereas, the interaction of micronaire value and staple length was observed significant. In case of rupture per kilometer, highly significant differences were observed for different levels of micronaire value and staple length as well as for their interaction. The results pertaining to yarn unevenness were found highly significant for different levels of micronaire value and staple length. The results regarding thin places were found highly significant for different levels of micronaire value and staple length.