Thesis Details

Thesis Title: The impact of MVS machine settings and finishing applications on yarn quality and knitted fabric hand
Thesis Author: William Michael Johnson
Abstract: The Murata Vortex Spinner (MVS), introduced in 1997, is capable of processing 100% carded cotton at speeds in excess of 400 mlmin. Little research is available regarding MVS yarn properties known to impact knitted fabric hand. The impact of finishing on knitted fabric using MVS yarn is also not documented. Understanding spinning machine changes, their impact on yarn properties, and the impact of finishing applications on hand could lead to replacing ring-spun yarn with MVS yarn in some fabric applications where hand is of critical importance. For this research, eighteen Ne 26's yams were spun on the MVS machine by using three spinning speeds, two nozzle pressures, and three different spindle types. Single-jersey knit fabric was constructed from these yarns, and the two best and one worst samples for hand were dyed and finished along with a ring-spun sample. In finishing, a cationic, a nonionic, and a silicone softener were used to alter the fabric hand. Two different levels of compaction were also used to determine if compacting had a significant impact on fabric hand. Using Kawabata to compare the MVS fabric samples revealed that those samples constructed from yarns spun at high speed using the flat spindle produced fabric with the softest hand, and when these fabrics were finished using a silicone softener, the hand became even softer. Comparing the hand of ring-spun fabric and MVS fabric revealed that ring-spun fabric finished with silicone was superior to all other MVS samples. However, the two MVS samples treated with silicone were superior in hand to all other samples and to all ring-spun fabric not treated with the silicone softener.