Analysis of Blend Irregularity in Gill Sliver

Part 2 : Effect of Processing Variables on Blend Irregularity

Abstract

The effect of processing system-stock blending or sliver blending, feeding direction and fiber length difference on the blending irregularity was discussed. The developed apparatus and methods described in Part 1 for evaluating blend irregularity was applied. Blended gill sliver composed of white and black fiber was examined during delivering from front roller of gill box.
The obtained results are as follows :
1) The blend irregularity for sliver blending decreases with increasing the stage of gilling and approaches to steady value at around five gillings. On the other hand, the blend irregularity for stock blending is smaller than the sliver blending. The blend irregularity for stock blend sliver remains almost constant as the stages of gilling.
2) Both the blend and thickness irregularity for forward feeding are larger than for reverse feeding.
3) Blend irregularity increases with increasing the difference in the blend fiber length.
4) There is a tendency for short fibers to get together in a thicker part of sliver.