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Textile Research Journal
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Filament Pre-tension in Core Yarn Friction Spinning

Ali Akbar Merati

Faculty of Engineering, Gifu University Yanagido 1-1, Gifu, Japan

Fujio Konda

Faculty of Engineering, Gifu University Yanagido 1-1, Gifu, Japan

Masaaki Okamura

Faculty of Engineering, Gifu University Yanagido 1-1, Gifu, Japan

Etsuo Marui

Faculty of Engineering, Gifu University Yanagido 1-1, Gifu, Japan

Core yams are known to improve cotton yam properties. In this research, core yarns are spun by introducing filaments under tension into the yarn-forming zone of an ex perimental friction spinning apparatus. A 30-denier (3.3 tex) nylon monofilament and a black 75-denier (35f) nylon multifilament make up the core, and cotton fibers are used as the sheath. The effect of filament pre-tension on the structural parameters and mechanical properties of the core yarn is examined, and core yarn properties are com pared with those of equivalent 100% cotton yarns. The photographic and fiber tracing methods are used to consider the appearance of the yarns and the geometric position of the core in the core yarns. The results show that the appearance of the core yarn is similar to that of regular cotton yarns, with the exception of core yarns produced with 00 gf/fil pre-tension. Core yarn irregularity does not change with filament pre-tension, and it is less than that of cotton yam. Core yam strength significantly increases as filament pre-tension and filament percentage increase, and it is greater than that of cotton yarn. Core yarn elongation is less than that of cotton yarn at a low filament percentage and greater than that of cotton yarn at a high filament percentage.

Textile Research Journal, Vol. 68, No. 4, 254-264 (1998)
DOI: 10.1177/004051759806800403
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