The Effects of Opening Roller Wire Design and Operating Speed on the Properties of Open-End Cotton Yarn

An important parameter to consider when spinning yarns using the open-end system is what combinations of comber roll wire design and speed will yield the most desirable yarns. The major goal of this research was to determine whether any significant trends in yarn properties could be traced to changes in these parameters. A parameter incorporating the different number of teeth per cm, comber roll speeds, and effects of twist on the amount of opening and defined as “beats per fiber” was investigated and found to have no correlation to any tested yarn properties. Other results indicated that yarn properties were more sensitive to changes in comber roll speed than to changes in wire type. The experimental data indicate that a properly selected set of opening parameters can yield yarns with different characteristics of strength, elongation, evenness, and defects. Some evidence supports the theory that increasing comber roll speeds will produce more even yarns.