In this study, we compared fiber trapping of embeddable and locatable spinning (ELS) with that of sirofil and siro core-spinning with flute pipe air suction. Online pictorial analysis showed that the 3rd ELS was free of the visual fiber loss during the 1st ELS, 2nd ELS, sirofil, and siro core-spinning. This indicated the 3rd ELS possessed high ability of trapping staple fibers. Weight loss of different yarns proved that the 3rd ELS had a statistically higher fiber trapping capacity than 1st ELS, sirofil and siro core-spinning. Yarn visual appearance results showed that filaments failed to be entirely buried in the siro core-spun yarn body due to the staple fiber loss and imperfect filament tension adjustment. Poor trapping and filament fasting of staple fibers might be the reasons for more hairy siro core-spun yarn than other composite yarns. Sirofil and siro core-spun yarn had higher value of coefficient of mass variation per unit yarn length and yarn imperfections than the 3rd ELS yarn which might be probably due to their irregular fiber loss during the sirofil and siro core-spinning. The fiber loss would result in a decrease in yarn cross-section fiber utilization; therefore, sirofil, siro core-spun and the 1st ELS yarn had a statistically lower tensile tenacity than the 3rd ELS composite yarn.

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This research aimed to study the effect of cotton stickiness in quality of ring-spun yarn, the effect of blending sticky with nonsticky cotton, and optimize the spinning process based on Taguchi experiment design technique. Nine experiments were performed with respect to the L9 orthogonal design. Taguchi method was utilized to find the sequence of dominant factors contributing to ring-spun yarn quality. The study showed that a slight and nonsignificant, negative effect on the coefficient of variation in mass of carded sliver, first and second drawn sliver. When considering the roving frame, the coefficient of variation in mass of roving was significantly increased with the increase in the stickiness level and the percentage of sticky cotton in the blends. In actual spinning, the quality of ring-spun yarn is susceptible to stickiness. The study concluded that the dominant factor contributing to the most quality characteristics of ring-spun yarn was cotton stickiness level .The study showed that the optimum condition for the blending ratio of sticky with nonsticky cotton was found to be 25 and 75%, respectively. The results showed a considerable improvement in the signal-to-noise ratio as compared to the initial conditions.

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