Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (05): 46-50.doi: 10.13475/j.fzxb.20200901605

• Textile Engineering • Previous Articles     Next Articles

Effect of ratio of strands twist factor to single yarn twist factor on properties of viscose plied yarns

NI Jie1, YANG Jianping2, YU Chongwen1,3()   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. College of Information Sciences and Technology, Donghua University, Shanghai 201620, China
    3. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China
  • Received:2020-09-07 Revised:2020-12-29 Online:2021-05-15 Published:2021-05-20
  • Contact: YU Chongwen E-mail:yucw@dhu.edu.cn

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Abstract:

In order to reflect comprehensively the influence of single yarn structural parameters on the properties of plied yarns, the influence of twist factor ratio on the strength, hairiness and wear resistance was studied with ring spun yarns made from viscose fiber with different yarn linear density and twists. The results show that there are two critical twist factor ratios for the reversely twisted plied yarns, which are about 0.7 and 1.5 respectively. At these two twist factor ratios, plied yarns can obtain higher strength. When the twist factor ratio is greater than 1, the number of harmful hairiness on the strands surface is reduced significantly. When the twist factor ratio is between 0 and 2, the larger the twist factor ratio is, the better the strands wear resistance. According to the overall comparison, twist factor ratio at 1.5 ensures the best comprehensive quality of the strands.

Key words: viscose fiber, double plied yarn, twist factor ratio, reverse twisting, plied yarn performance, ring spinning

CLC Number: 

  • TS101.9

Tab.1

Fiber performance parameters"

原料 纤维长度/
mm		 线密度/
dtex		 断裂强力/
cN		 断裂伸长率/
%
普通粘胶 38 1.33 3.51 22.46
莫代尔纤维 39 1.30 4.31 15.89

Tab.2

Designed single yarn specification and ply method"

单纱
编号		 原料 设计线密度/
tex		 设计捻度/
(捻·m-1)		 设计
捻系数		 单纱
组合
A1 普通粘胶 18 700 297 A1+A2
A2 普通粘胶 18 700 297
A3 普通粘胶 15 700 271 A3+A4
A4 普通粘胶 15 900 349
B1 莫代尔 15 700 271 B1+B2
B2 莫代尔 30 700 383
B3 莫代尔 15 800 310 B3+B4
B4 莫代尔 25 800 400
C1 莫代尔 15 850 329 C1+C2
C2 莫代尔 20 700 313
C3 莫代尔 15 850 329 C3+C4
C4 莫代尔 20 600 268

Tab.3

Single yarn tensile test results"

单纱
编号		 实测线密度/tex 实测捻度/
(捻·m-1)		 实际捻系数 断裂强力/cN 断裂强度/
(cN·tex-1)		 断裂强力
CV值/%		 断裂伸长率/% 断裂伸长率
CV值/%
A1 17.67 708 298 221.37 12.53 6.92 9.17 10.13
A2 17.93 700 296 219.80 12.26 5.37 7.84 9.67
A3 14.90 716 276 177.63 11.92 6.46 8.25 9.78
A4 15.57 878 347 198.83 12.77 6.50 9.43 8.66
B1 14.50 699 266 248.70 17.15 9.81 8.04 8.59
B2 29.50 730 397 513.70 17.41 6.51 9.90 5.18
B3 14.97 795 308 257.47 17.20 7.92 8.33 8.13
B4 25.10 829 415 429.60 17.12 7.67 9.18 7.19
C1 15.00 865 335 214.07 14.27 8.48 5.57 11.08
C2 20.20 698 314 346.83 17.17 7.07 8.49 7.74
C3 14.97 851 329 210.83 14.08 9.35 5.70 13.59
C4 20.03 583 261 338.80 16.91 6.53 7.89 7.27

Tab.4

Actual strand twist coefficient and twist coefficient ratio"

单纱
组合		 捻系数 捻系
数比		 单纱
组合		 捻系数 捻系
数比		 单纱
组合		 捻系数 捻系
数比		 单纱
组合		 捻系数 捻系
数比		 单纱
组合		 捻系数 捻系
数比		 单纱
组合		 捻系数 捻系
数比
A1+A2 67 0.23 A3+A4 59 0.19 B1+B2 101 0.30 B3+B4 102 0.28 C1+C2 93 0.29 C3+C4 67 0.23
94 0.32 120 0.39 165 0.50 197 0.54 178 0.55 90 0.30
160 0.54 180 0.58 238 0.72 262 0.73 247 0.76 158 0.54
210 0.71 227 0.73 296 0.89 323 0.89 300 0.93 227 0.77
274 0.92 281 0.90 374 1.13 380 1.05 357 1.10 275 0.93
331 1.12 341 1.09 434 1.31 481 1.33 411 1.27 340 1.15
396 1.33 395 1.27 496 1.50 541 1.50 475 1.47 400 1.35
453 1.52 446 1.43 591 1.78 608 1.68 532 1.64 452 1.53
525 1.77 504 1.62 667 2.01 681 1.88 673 2.08 501 1.70
585 1.97 578 1.86
687 2.31 622 2.00

Fig.1

Relationship between strand strength and twist ratio"

Fig.2

Test results of hairiness of strands over 3 mm"

Fig.3

Test results of abrasion resistance of strands"

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