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Abstract
In this study, the effect of process parameters of 100% viscose air-jet spun yarns produced by Autoairo spinning machine on tensile properties of plied yarns were investigated. Spinning draft, delivery speed, and count of single yarn besides the twist of plied yarns were selected as process parameters. The count of plied yarn was Ne 7.5 which is one the most common yarns used as plied yarn in machine made carpet industry. The Taguchi L18 orthogonal array method was used to evaluate the effect of process parameters on physical and mechanical properties of plied yarns. The significance of independent variables on breaking strength and breaking elongation of plied yarns was evaluated statistically based on Taguchi and ANOVA method at 95% confidence level. Moreover, the Scanning Electron Microscopy (SEM) method was used to evalute the longitudinal cross section of yarns. Our findings confirmed the aforementioned parameters have different effect on tensile properties of single and plied yarns.
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