关键词: 赛络纺包芯纱, 长丝喂入位置, 纱线断裂特征, 退捻, 纱线质量

Abstract:

To investigate the influence of different filament feeding positions on core-spun yarn performance in siro-spinning, three types of core-spun yarns were spun. Polyester filaments in the spinning process were fed in the center of left roving filament, in the center of two roving filament and in the center of right roving filament, respectively. The cross-section, quality, abrasion resistance, tensile fracture and untwisting characteristics of the prepared core-spun yarns were compared and analyzed. The results show that there are no obvious phenomena of filaments out of yarn surface for all the core-spun yarns, and the inner polyester filament was near the center of the yarn. The yarns were clean and even with less hairiness. For the yarn fed in the left roving center, the tensile fracture of yarn was characterized by multi-peak fracture. For the yarn fed in the two roving center, the tensile fracture of yarn was characterized by dense fluctuation. While for the yarn fed in the center of right roving, its tensile fracture characteristic was in the form of ladder shape. Among the yarns, the initial elastic modulus of the yarn fed in the center of right roving was the highest and the untwisting of this yarn was the most difficult, and during the unwinding process of the yarn, some yarn segments were reversely twisted, which showed a more stable yarn structure and thus provided a good abrasion resistance and the highest yarn strength.

Key words: siro-spinning core-spun yarn, filament feeding position, yarn fracture characteristic, untwisting of yarn, yarn quality