Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (11): 48-52.doi: 10.13475/j.fzxb.20200400805

• Textile Engineering • Previous Articles     Next Articles

Enhanced process optimization and mechanism analysis of thermal adhesion for air jet vortex spun yarn

CHEN Yuxiang1,2, YU Meiya1, DONG Zhengmei3, MIAO Lulu1, LIN Yanyan1, ZOU Zhuanyong1()   

  1. 1. Key Laboratory of Clean Dyeing and Finishing Technology in Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang 312000, China
    2. College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    3. Xilinmen Furniture Co., Ltd., Shaoxing, Zhejiang 312000, China
  • Received:2020-04-03 Revised:2020-08-19 Online:2020-11-15 Published:2020-11-26
  • Contact: ZOU Zhuanyong E-mail:zouzhy@usx.edu.cn

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Abstract:

In order to explore effective ways to improve the strength and elongation properties of air jet vortex spun yarn, the effect of the heat treatment temperature, heat treatment speed and draw ratio on the breaking strength and elongation of viscose / low melting point polyester air jet vortex spun yarn was studied based on the Box-Behnken Design response surface method. The optimal heat treatment process parameters were determined and the mechanism of thermal adhesion to reinforce the air jet vortex spun yarn was explored. The results show that the heat treatment temperature, heat treatment speed, draw ratio, the secondary term of heat treatment speed, heat treatment speed and draw ratio interaction terms have obvious influence on the yarn breaking strength. The elongation at break is significantly affected by the heat treatment temperature and heat treatment speed, while the influence of draw ratio is not obvious. The best parameter values of heat treatment process obtained through the optimization are heat treatment temperature 193 ℃, heat treatment speed 90 m/min, draw ratio 1.00. The yarn breaking strength is increased by 10.7% compared with the original yarn, and the elongation is increased by 2.8% after optimization. Furthermore, it is found that the heating deformation, point-like and agglomerated heat-bonding of low-melting polyester fibers are the key to achieve thermal bonding enhancement of air jet vortex spun yarn.

Key words: air jet vortex spinning, strength and elongation property, thermal adhesion process, response surface methodology

CLC Number: 

  • TS131

Tab.1

Factor level table of heat treatment process for yarn"

水平 热处理温度
x1/℃		 热处理速度
x2/(m·min-1)		 牵伸倍数
x3
-1 120 10 1.00
0 160 50 1.06
1 200 90 1.12

Tab.2

BBD response surface design scheme and experimental results"

运行序 　x1 　x2 　x3 断裂强力
Y1/cN		 断裂伸长率
Y2/%
1 -1 -1 0 272.867 5 10.648
2 1 -1 0 274.894 7 9.470
3 -1 1 0 256.266 1 11.234
4 1 1 0 262.903 3 10.964
5 -1 0 -1 257.166 4 11.273
6 1 0 -1 267.234 8 10.716
7 -1 0 1 251.401 3 10.667
8 1 0 1 260.337 3 10.492
9 0 -1 -1 270.825 5 10.587
10 0 1 -1 264.601 9 11.209
11 0 -1 1 276.272 4 10.153
12 0 1 1 254.506 0 11.303
13 0 0 0 258.390 0 10.837
14 0 0 0 263.241 2 10.982
15 0 0 0 261.864 4 11.209

Tab.3

Regression analysis of response surface quadratic"

方差来源 断裂强力Y1 断裂伸长率Y2
F值 P值 F值 P值
x1 18.16 0.002 16.82 0.003
x2 75.96 0.000 52.51 0.000
x3 7.11 0.026 4.84 0.059
x12 — — 5.50 0.047
x22 31.76 0.000 4.32 0.071
x1x2 — — 5.84 0.042
x2x3 11.46 0.008 — —
回归模型 28.89 0.000 14.86 0.001
失拟项 0.80 0.657 1.01 0.576

Fig.1

Contour map of heat treatment process response value (yarn breaking strength). (a)Heat treatment temperature and speed; (b)Heat treatment temperature and draw ratio;(c)Heat treatment speed and draw ratio"

Fig.2

Contour map of heat treatment process response value (yarn breaking elongation ratio). (a)Heat treatment temperature and speed; (b) Heat treatment temperature and draw ratio; (c) Heat treatment speed and draw ratio"

Tab.4

Multi-response optimization"

类别 断裂强力Y1/cN 断裂伸长率Y2/%
范围 >250 >9
目标 274.9 11.3
权重 50 50

Tab.5

Optimization and verification of heat treatment process"

x1/℃ x2/
(m·min-1)		 x3 断裂强力Y1/cN 断裂伸长率Y2/%
预测 实测 预测 实测
0.818 2 1 -1 268.45 275.55 11.25 11.37

Fig.3

Fiber morphology of low melting point polyester air jet vortex spun yarns before and after heat treatment. (a) Untreated fiber (×300); (b) Thermal deformation after heat treatment (×1 000); (c) Point-like shape of melt bond (×1 000); (d) Agglomerated shape of melt bond (×1 000) "

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