Influence of process parameters on migrational characteristics of open-end and core-sheath friction spun yarns

摘要

The migration characteristics of open-end and sheath fibres of core-sheath friction spun yarn have been studied using the tracer fibre technique. In open-end friction spun yarns, migration parameters were studied in both two-dimensional and three-dimensional projection methods. From the analysis, it has been observed that three-dimensional studies give higher mean fibre position (MFP), root mean square (RMS) deviation and mean migration intensity (MMI) than two-dimensional studies. The results show that fibres from first sliver feeding position have significantly higher MFP, RMS deviation and MMI than fifth sliver feeding position. The results also show that trailing half of fibres for first sliver feeding position has higher MFP, RMS deviation and MMI than leading half of fibres for both types of yarns. The migration parameters are mainly influenced by suction air pressure followed by opening roller speed and difference in drum speed for both open-end and core-sheath friction yarns. In open-end friction yarns for first and fifth sliver feeding positions, the experimental variables show different trends for MFP and RMS deviation.