|
Abstract:
|
One of the basic machine components of open-end spinning is the combing roll,
utilized for fiber separation. Because fiber opening is the first stage of the open-end
spinning process, optimum fiber separation at the combing roll becomes a principal
factor affecting yarn quality and spinning performance. Combing roll wire, surface,
and speed are parameters for proper fiber separation with minimal fiber damage.
Both 100% cotton and 50/50 polyester/cotton open-end yarns were spun using a
variety of combing roll parameters. Physical yarn properties were statistically
analyzed to determine the effects of wire, surface, and speed of the combing roll on
yarn quality.
In this research, increases in combing roll speed were observed to deteriorate
several yarn properties. Combing roll wire and surface also influenced many
physical properties of 100% cotton and 50/50 polyester/cotton yarns. The following
list identifies the specific findings of this research:
1. For 24/1 100% cotton yarns, higher combing roll speeds deteriorated
single-end strength and elongation. Minor increases were observed in U ster
hairiness and lint shedding with increased combing roll speed.
2. For 50/50 polyester/cotton yarns, increases in combing roll speed resultedin
losses for single-end strength and elongation. Minor deteriorations in yarn
appearance and lint shedding were detected with higher combing roll speeds.
3. Based on the ITT MQC96 overall quality ranking, the OB20/4 diamondnickel
wire roll produced the highest quality index for the 12/1 100 % cotton
and 20/1 50/50 polyester/cotton yarns; the OB20/4 uncoated wire produced
the highest quality index for the 24/1 100 % cotton yarns.
4. The OB20/4 diamond-nickel combing roll was found to be suitable for both
100% cotton and 50/50 polyester/cotton open-end spinning applications.
|