The effect of various carding parameters on hooking and loading characteristics and on yarn quality has been investigated for a California 15/32 -in. cotton.Lickerin speeds and method of doffing the card web were shown to have no effect on the pattern of hook formation which is influenced mainly by cylinder and doffer speeds and the hank of the delivered sliver. These same factors also influence the loading on the cylinder and the coefhcient of transfer of fibers to the doffer. No clear-cut relationship between loading and hooking has, however, emerged. Increased doffer and cylinder speeds, at a constant carding rate, were seen to decrease yarn imperfections..
Hook formation at fiber ends and fiber disorder in the card sliver have been studied by using a fluorescent-tracer-fiber technique and Lindsley's method for measuring comb ing ratio. The rate of throughput at the card and the cylinder and doffer loadings have been shown to affect the proportions of the different types of hooks in the sliver. Other factors, such as the type of wire on cylinder and doffer, the action of flats, and the doffer comb speed, have been seen to have no influence on hook formation. Within the range of speeds investigated, the speed ratio between doffer and cylinder has little influence on hook formation. On the basis of the results obtained and the different hypotheses of Morton, it is suggested that the trailing and leading hooks are both formed at the junc tion of cylinder and doffer, but by different mechanisms.
Z-complementary code sets (ZCCS) are used in multicarrier code-division multiple access (MC-CDMA) systems, where they guarantee error-free transmission in a nonsynchronous setting. There aren't many direct ways to build binary optimal ZCCSs with lengths that are non-power-oftwo (NPT). This letter suggests two direct ways to build binary optimal ZCCSs with lengths that are NPT. The proposed designs are based on generalised Boolean functions (GBF). The results are new and does not exists in the literature.
The study is to find out the relation of thread breakage rate on modern loom to the relative humidity and fabric specifications. This result supports thread breakage rate increased with the choice of rapier loom instead of air jet loom. It also shows that loom width has negative relation towards thread breakage and in the production floor relative humidity has insignificant relation with thread breakage rate. Key part of the study shows that warp and weft breakage rate has interrelation. In the production floor loom types and fabric constructions are studied for thread breakage at floor temperature and found no relation to the relative humidity. But, significant relation of warp and weft thread breakage rate to EPI, loom categories, loom width, fabric length produced, weft count and interrelation between warp and weft breakage rate.
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