Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (02): 58-62.doi: 10.13475/j.fzxb.20180908405

• Textile Engineering • Previous Articles     Next Articles

Thermal adhesion enhancement process of air jet vortex spun yarn

LIN Yanyan1,2, ZOU Zhuanyong1(), CHEN Yuxiang1, YANG Yanqiu1   

  1. 1. Key Laboratory of Clean Dyeing and Finishing Technology in Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang 312000, China
    2. College of Textiles, Donghua University, Shanghai 201620, China
  • Received:2018-09-30 Revised:2018-11-12 Online:2019-02-15 Published:2019-02-01
  • Contact: ZOU Zhuanyong E-mail:zouzhy@usx.edu.cn

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Abstract:

Aiming at poor strength of air jet vortex spun yarn, low-melting point polyester fiber was introduced to reinforce air jet vortex spun yarn by heat bonding. The significant differences of the influence of different thermal contact modes on the yarn fracture work were compared by means of T-test. Orthogonal design was used to study the influence of heat treatment temperature, heat treatment speed and draw ratio on the yarn fracture work, and the optimal process was verified. The results show that the original yarn subjected to non-contact heat treatment has significantly improved fracture work. The fracture work of yarns increases first and then decreases with the rise of heat treatment temperature. When the speed increases, it shows an upward trend. With the increase of the draw ratio, the fracture work improves obviously. The optimal heat treatment process is: heat treatment temperature of 145 ℃, heat treatment speed of 600 cm/min, and draw ratio of 1.06, and the fracture work of the jet vortex spun yarn can be increased by 13% after the optimal process heat treatment.

Key words: air jet vortex spinning, low melting point polyester, fracture work of yarn, thermal adhesion

CLC Number: 

  • TS131

Tab.1

Material specifications and performance indicators"

纤维
种类		 线密度/
dtex		 长度/
mm		 断裂强度/
(cN·dtex-1)		 断裂伸长
率/%		 弹性模量/
(cN·dtex-1)
粘胶 1.33 38 2.506 17.53 4.82
涤纶 2.22 51 5.24 31.78 10.01

Fig.1

Heat treatment process flow chart. (a) Contact flow chart; (b) Noncontact flow chart"

Tab.2

Factor level table"

水平 A B C
热处理温度/ ℃ 热处理速度/(cm·min-1) 牵伸倍数
1 130 300 1.00
2 145 600 1.03
3 160 900 1.06

Fig.2

SEM photos of viscose/low melting point polyester air jet vortex spinning original yarn. (a)Low magnification(×100);(b)High magnification(×300)"

Tab.3

Results of orthogonal test and range analysis"

试验
序号		 A B A×B C 断裂功/
(N·mm)
1 1 1 1 1 86.545
2 1 2 2 2 91.369
3 1 3 3 3 89.443
4 2 1 2 3 92.680
5 2 2 3 1 88.253
6 2 3 1 2 88.798
7 3 1 3 2 84.205
8 3 2 1 3 87.105
9 3 3 2 1 88.862
K1 89.119 87.810 87.483 87.887
K2 89.910 88.909 90.970 88.124
K3 86.724 89.034 87.300 89.743
R 3.186 1.224 3.670 1.856

Tab.4

Optimal process results"

指标
类型		 断裂强
力/N		 断裂伸
长率/%		 弹性模量/
(cN·dtex-1)		 断裂功/
(N·mm)
原纱 2.489 11.061 24.339 85.394
最佳工艺 2.809 11.339 25.321 96.534

Fig.3

Typical SEM images of viscose/low melting point polyester air jet vortex spinning yarn after heat treatment. (a)Thermal deformation(×1 000);(b)Melt bond (×500)"

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