|
Abstract:
|
Ring spinning has traditionally been the major production unit for spun yam
manufacturing. In the last 30 years, new innovations in spinning have produced different
types of spinning machines. The open-end spinning machine was the first successful type
of spinning machine other than ring spinning. Murata introduced the Murata Jet Spinner
(MJS), which forms yam by the air jet principle. The MJS machine offered significant
productivity advantages over ring spinning. A limitation to the MJS machine is its
inability to successfully spin 100% carded cotton fibers. In 1997, Murata introduced the
Murata Vortex Spinner (MVS) No. 851 as its newest spinning machine. The new MVS
machine uses a vortex of air to entangle the fibers and can successfully spin 100% carded
cotton as well as blends of fibers.
The objective of this research was to evaluate the impact of percent size add-on,
slasher stretch, and pre-wet sizing on the yam properties and predicted weaving
performance ofMVS yams. Specifically, five different levels of size add-on (6%,8%,
10%,12%, and 14%), three different levels of slasher stretch (1.5%,2.0%, and 2.5%),
and normal versus pre-wet slashing were used to evaluate changes in MVS yam
properties and on simulated weaving abrasion resistance.
Two different counts and blends of yam were used and the MVS yam was
compared against yam produced from two other spinning systems. The first experiment
compared a 2011 Ne 100% cotton MVS and ring yam. The second experiment compared
a 35/1 Ne 50/50 polyester/cotton MVS and MJS yam.The results of this research indicate that the MVS yarn performs similarly to other
yarn types during slashing. At higher size add-on levels, above 8-10%, the MVS yarn has
a higher resistance to abrasion, higher single-end strength, and fewer hairs. ~Tith the
addition of size, the single-end elongation ofthe MVS yarn decreases. Stretch also
significantly affects the MVS yarn properties. The MVS yarn exhibited the best tensile
properties when sized with lower levels of slasher stretch. The abrasion resistance of the
sized MVS yarn was higher than that of the sized ring or sized MJS yarn. In addition, the
MVS yarn took on more size than the ring yarn for the 20/1 Ne experiment, while the
MJS yarn took on more size than the MVS yarn for the 3511 Ne experiment.
|