纺织学报 ›› 2024, Vol. 45 ›› Issue (11): 73-79.doi: 10.13475/j.fzxb.20230903201

• 纺织工程 • 上一篇    下一篇

热处理工艺对喷气涡流纺低熔点涤纶长丝包芯纱力学性能的影响

缪璐璐1,2, 孟小奕2, 董正梅2,3, 彭倩2, 何林伟3,4, 邹专勇1,2()   

  1. 1.绍兴文理学院 浙江省清洁染整技术研究重点实验室, 浙江 绍兴 312000
    2.绍兴文理学院 绍兴市高性能纤维及制品重点实验室, 浙江 绍兴 312000
    3.绍兴国周纺织新材料有限公司, 浙江 绍兴 312000
    4.绍兴国周纺织整理有限公司, 浙江 绍兴 312030
  • 收稿日期:2023-09-14 修回日期:2024-05-21 出版日期:2024-11-15 发布日期:2024-12-30
  • 通讯作者: 邹专勇(1983—),男,教授。主要研究方向为新型纱线加工理论与应用研究。E-mail:zouzhy@usx.edu.cn。
  • 作者简介:缪璐璐(1998—),女,硕士生。主要研究方向为纺织材料与纺织品设计。
  • 基金资助:
    国家自然科学基金项目(51573095);国家级大学生创新创业训练计划项目(201910349028)

Effect of heat treatment on mechanical property of core-spun yarn from low melting point polyester filament made by air-jet vortex spinning

MIAO Lulu1,2, MENG Xiaoyi2, DONG Zhengmei2,3, PENG Qian2, HE Linwei3,4, ZOU Zhuanyong1,2()   

  1. 1. Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang 312000, China
    2. Shaoxing Key Laboratory of High Performance Fibers & Products, Shaoxing University, Shaoxing, Zhejiang 312000, China
    3. Shaoxing Guozhou Textile New Material Co., Ltd., Shaoxing, Zhejiang 312000, China
    4. Shaoxing Guozhou Textile Finishing Co., Ltd., Shaoxing, Zhejiang 312030, China
  • Received:2023-09-14 Revised:2024-05-21 Published:2024-11-15 Online:2024-12-30

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摘要：

为进一步提升喷气涡流纺包芯纱的力学性能,发挥低熔点长丝的热熔型黏合特性,制备低熔点涤纶长丝喷气涡流纺包芯纱,基于Box-Behnken Design响应面法,探究非接触式热处理过程中牵伸倍数、热处理速度和热处理温度3个因素对包芯纱断裂强度、断裂伸长率和断裂功的影响规律,并进行热处理工艺优化。研究结果表明:热处理温度和牵伸倍数减小、热处理速度增大,有利于包芯纱的断裂强度、断裂伸长率、断裂功的增大。通过响应优化,得到低熔点涤纶长丝喷气涡流纺包芯纱的最佳热处理工艺:热处理温度为130 ℃;速度为9 000 mm/min;牵伸倍数为1.00。经过最优热处理工艺加工后包芯纱断裂强力提高7.64%,断裂伸长率提高9.34%,断裂功提高13.78%。

关键词: 喷气涡流纺包芯纱, 低熔点长丝, 热处理工艺, 纱线力学性能, 纺纱工艺

Abstract:

Objective Low melting point polyester fiber can be used as a hot-melt adhesive material. The strength of air-jet vortex spinning core-spun yarn is closely related to the mechanical properties of core-filament. We replace the core-filament of the air-jet vortex spinning core-spun yarn with a low melting point filament. By studying the appropriate heat treatment process, it can not only help the core-filament to maintain a certain mechanical properties, but also use the effect of thermal bonding enhancement of low melting point fibers to further improve the strength of air-jet vortex spinning core-spun yarn.

Method The core-spun yarn with low melting point polyester filament wrapped by polyester staple fiber was produced on MVS No.870 spinning machine, and the yarn was subjected to non-contact heat treatment on the XPLORE flat traction heating device. The heat treatment process was designed based on Box-Behnken Design (BBD) response surface. The effects of heat treatment temperature, heat treatment speed and draft multiple on the breaking strength, breaking elongation and breaking work of core-spun yarn were investigated by statistical analysis method. At the same time, the response value was optimized to obtain the best heat treatment scheme for the preparation of high strength core-spun yarn.

Results The breaking strength of the core-spun yarn was significantly affected by heat treatment temperature, heat treatment speed, draft multiple, as well as the interaction term of heat treatment temperature and heat treatment speed. The breaking elongation was significantly affected by heat treatment temperature, heat treatment speed, draft multiple, draft multiple secondary term, heat treatment temperature and heat treatment speed interaction term, and heat treatment speed and draft multiple interaction term. The breaking work was significantly affected by heat treatment temperature, heat treatment speed, draft multiple, heat treatment temperature secondary term, and heat treatment temperature and heat treatment speed interaction term. By analyzing contour plots of the relationship between response value and heat treatment process, it was found that under the same draft multiple, the breaking strength of the core-spun yarn showed an monotonous increase with the heat treatment speed increasing and the heat treatment temperature decreasing. The higher heat treatment temperature led to greater increase in the breaking strength of the core-spun yarn. In addition, at a stable draft multiple, when the heat treatment temperature was lower and the heat treatment speed was higher, the core-spun yarn breaking elongation was higher, and breaking work was higher. When the heat treatment temperature was constant, the breaking strength of the core-spun yarn would increase and the breaking elongation and the breaking work would decrease with the increase of the draft multiple. Combining the results of contour plots and response optimizer processing, the optimal heat treatment process parameters were obtained, with heat treatment temperature being 130 ℃, draft multiple 1.00, and heat treatment speed is 9 000 mm/min. After the heat treatment of the raw yarns, the yarn properties were improved, the longitudinal morphology of the core yarns became more compact, and some of the single fibers were bonded to each other in the cross-section. After the optimal heat treatment process, the yarn properties were improved, the longitudinal morphology of the core-spun yarn became more compact, and there was adhesion between some single fibers in the cross section.

Conclusion Air-jet vortex spinning was to prepare low melting point filament core-spun yarn. Through heat treatment process, the core-filament was partially melted, effectively limiting the slip of fibers in air-jet vortex spinning, and the cohesion between fibers can be improved. The breaking strength, breaking elongation and breaking work of the yarn are closely related to the setting of heat treatment temperature, heat treatment speed and draft multiple. In general, with the decrease of heat treatment temperature and draft multiple, and the increase of heat treatment speed, the breaking strength and breaking elongation of core-spun yarn increase, so the breaking work also increases. Using the optimized heat treatment process, the core-spun yarn breaking strength is increased by 7.64%, the breaking elongation is increased by 9.34%, and the breaking work is increased by 13.78%.

Key words: air-jet vortex spinning core-spun yarn, low melting point filament, heat treatment process, mechanical properties of yarn, spinning technology

中图分类号: 

  • TS104.2

图1

热处理装置示意图"

表1

热处理工艺的因素水平表"

水平 热处理
温度A/℃		 热处理速度
B/(mm·min-1)		 牵伸
倍数C
-1 130 1 000 1
0 180 5 000 1.03
1 230 9 000 1.06

表2

热处理工艺的试验与纱线力学性能结果"

热处理
序号		 A B C 断裂强度
X/(cN·tex-1)		 断裂伸长率
Y/%		 断裂功
Z/(cN·mm)
1 -1 -1 0 14.17 6.49 5 124.28
2 1 -1 0 15.33 6.42 5 465.42
3 -1 1 0 17.65 8.68 9 484.62
4 1 1 0 13.53 6.71 5 119.64
5 -1 0 -1 16.19 8.68 8 547.99
6 1 0 -1 13.28 7.93 5 768.69
7 -1 0 1 16.42 7.25 6 450.69
8 1 0 1 14.53 5.62 4 336.83
9 0 -1 -1 13.88 8.05 6 227.47
10 0 1 -1 15.49 8.26 7 112.08
11 0 -1 1 14.89 5.72 4 493.73
12 0 1 1 16.70 7.5 6 801.16
13 0 0 0 15.00 7.02 5 712.38
14 0 0 0 13.95 6.91 5 431.18
15 0 0 0 14.02 6.63 5 225.67

表3

响应曲面的回归分析"

方差
来源		 断裂强度X 断裂伸长率Y 断裂功Z
F值 P值 F值 P值 F值 P值
A 28.78 0.002 42.82 0.000 87.11 0.000
B 12.43 0.012 43.79 0.000 56.90 0.000
C 6.54 0.043 102.24 0.000 34.04 0.001
A2 1.79 0.230 — — 7.45 0.034
B2 3.40 0.115 — — 4.25 0.085
C2 2.56 0.161 10.28 0.013 3.74 0.101
AB 26.65 0.002 15.82 0.004 48.53 0.000
BC — — 10.80 0.011 4.44 0.080
回归模型 11.60 0.002 37.62 0.000 30.56 0.000
失拟值 0.64 0.686 1.55 0.443 2.37 0.318

图2

包芯纱断裂强度响应值与热处理工艺关系的等值线图"

图3

包芯纱断裂伸长率响应值与热处理工艺关系的等高值图"

图4

包芯纱断裂功响应值与热处理工艺关系的等高值图"

表4

响应值优化参数"

类别 断裂强度
X/(cN·tex-1)		 断裂伸长率
Y/%		 断裂功
Z/(cN·mm)
范围 >13.28 >5.62 >4 336.83
目标 17.65 8.68 9 484.62
权重 0.5 0.5 1

图5

喷气涡流纺包芯纱热处理前后纵向和横向形态照片"

表5

热处理工艺优化与验证"

A B C 断裂强度
X/(cN·tex-1)		 断裂伸长率
Y/%		 断裂功
Z/(cN·mm)
预测 实际 预测 实际 预测 实际
-1 1 -1 18.06 16.91 9.42 9.25 10 338 8 220.82

表6

独立样本检验结果"

性能指标 Levene方差齐次检验
(H0:σ1=σ2)		 均值等同性t检验
(H0:μ1=μ2)
F值 P值 T值 P值
断裂强度X 0.423 0.516 4.981 0.000
断裂伸长率Y 0.881 0.350 6.692 0.000
断裂功Z 0.152 0.697 5.192 0.000
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