Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (08): 64-70.doi: 10.13475/j.fzxb.20201008507

• Textile Engineering • Previous Articles     Next Articles

Effect of filament feeding positions on structure and properties of siro-spinning core-spun yarns

WU Jiaqing1, WANG Ying1(), HAO Xinmin2, GONG Yumei1, GUO Yafei2   

  1. 1. School of Textile and Material Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, China
    2. Institute of Quartermaster Engineering & Technology, Systems Engineering Institute, Academy of Military Sciences, Beijing 100010, China
  • Received:2020-10-30 Revised:2021-04-30 Online:2021-08-15 Published:2021-08-24
  • Contact: WANG Ying E-mail:wangying@dlpu.edu.cn

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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

CLC Number: 

  • TS104.1

Fig.1

Roving and filament feeding position of siro-spinning core-spun yarn"

Tab.1

Experiment scheme of siro-spinning core-spun yarns"

纱线编号 实验方案
YA 涤纶长丝在白色棉粗纱1中心由导丝轮6从L点喂入
YB 涤纶长丝在粗纱1和粗纱2二者的中间由导丝轮6从M点喂入
YC 涤纶长丝在黑色涤纶粗纱2中心由导丝轮6从R点喂入

Fig.2

Cross sections images of three kinds of siro-spinning core-spun yarns (×200)"

Fig.3

Twisting triangle area of siro-spinning core-spun yarn"

Tab.2

Performance indexes of three kinds of siro-spinning core-spun yarns"

纱线编号 纱线线密
度/tex		 初始弹性模量/
(cN·tex-1)		 断裂强度/
(cN·tex-1)		 断裂伸长
率/%		 断裂功/
mJ		 条干CV
值/%		 毛羽
H值		 平均摩擦
次数
YA 65.11 92.26 12.62 10.83 101 12.46 3.68 208
YB 65.13 86.02 13.04 12.27 119 11.99 4.13 298
YC 65.13 100.77 13.08 11.85 121 11.79 4.05 302

Fig.4

Surface appearance of YA and YC core-spun yarns after 200 frictions"

Fig.5

Tensile fracture curves of three kinds of core-spun yarns"

Fig.6

Appearance of core-spun yarn YC before and after fracture. (a)Undrawn yarn;(b)Broken yarn of cotton fiber"

Fig.7

SEM images of different positions during tensile fracture process of YC core-spun yarn. (a) Yarn position of G and J(×30);(b) Yarn position of H and J(×30); (c) Enlargement of yarn position of H(×1 000)"

Fig.8

Untwist appearance of three kinds of core-spun yarns"

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