Study on rotor deposition: Part II - Influence on quality and running performance of fibre dyed cotton yarn

Abstract

The residual trash content in finisher draw frame sliver of natural yellow and green dyed cotton slivers is found to be very high as compared to that in grey or reactive dyed slivers, which is due to the deposition of large dye particles over the surface of' fibres during dyeing. The residual trash content of natural indigo dyed sliver is very low, but the end breakage rate of indigo and green dyed is extremely high which is due to coating of rotor surface with colours because of the poor crock fastness of these two fibres. The quality of yarn also deteriorates due to the coating of rotor surface with colours. Blending of grey cotton sliver with natural indigo sliver at finisher draw frame stage shows improvement in spinnability and yarn quality.