涡流纺纱线的包缠加捻对其力学性能的影响

doi:10.13475/j.fzxb.20200504408

摘要/Abstract

摘要：

为探究涡流纺纱线的包缠加捻与成纱力学性能的关系,从理论上分析了涡流纺纱线拉伸过程中的纤维形变与受力,详细研究了涡流压力和纺纱速度对涡流纺纱线力学性能的影响。结果表明:外层纤维螺旋包缠特性对涡流纺成纱的力学性能起着决定性作用,涡流压力和纺纱速度为影响涡流纺包缠和加捻效果的主要因素;当纺纱速度为280 m/min时,随着涡流压力的增加,涡流纺纱线的断裂比强度和弹性模量呈先增加后下降的变化趋势,而断裂伸长率基本不变,且当涡流压力为0.55 MPa时,涡流纺成纱力学性能最优;当涡流压力恒定为0.45 MPa时,随着涡流纺纱速度的增加,涡流纺纱线的断裂比强度、断裂伸长率均呈略微下降趋势,弹性模量呈现先下降后基本不变的趋势。

关键词: 涡流纺纱线, 包缠加捻, 涡流压力, 纺纱速度, 力学性能

Abstract:

In order to investigate the effect of winding and twisting on the mechanical properties of the air-jet vortex spun yarns, the deformation and force loading of the fibers in air-jet vortex spun yarn during stretching process was analyzed theoretically in this paper, and the effect of the vortex pressure and the spinning speed on the mechanical properties of the vortex spun yarn was investigated in detail. The results indicate that the spiral wrapping of the outer fibers play a decisive role in the mechanical properties of the yarn. The vortex pressure and the spinning speed are the two main factors affecting wrapping and twisting effect of the vortex spinning. When the spinning speed was fixed as 280 m/min, the breaking tenacity and the initial modulus of the yarn demonstrate an increase followed by a decrease, with the breaking elongation virtually unchanged, with the increase of the vortex pressure. When the spinning speed was fixed as 280 m/min with the vortex pressure being 0.55 MPa, the optimum mechanical properties of the yarn were obtained. When the vortex pressure was fixed as 0.45 MPa, with the increase of the spinning speed, the breaking tenacity and the breaking elongation of the yarn both show a slight decreasing trend, and the initial modulus shows a decrease and then stabilized.

Key words: vortex spun yarn, wrapping and twisting, vortex pressure, spinning speed, mechanical properties

中图分类号:

TS101.2

陈美玉, 刘玉琳, 胡革明, 孙润军. 涡流纺纱线的包缠加捻对其力学性能的影响[J]. 纺织学报, 2021, 42(01): 59-66.

CHEN Meiyu, LIU Yulin, HU Geming, SUN Runjun. Effect of wrapping and twisting on mechanical properties of air-jet vortex spun yarns[J]. Journal of Textile Research, 2021, 42(01): 59-66.

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样品编号	涡流压力/ MPa	纺纱速度/ (m·min^-1)	喂入比	张力比	总牵伸倍率	主牵伸倍率
1^#	0.45	280	0.97	1.025	162	27
2^#	0.50	280	0.97	1.025	162	27
3^#	0.55	280	0.97	1.025	162	27
4^#	0.60	280	0.97	1.025	162	27
5^#	0.65	280	0.97	1.025	162	27
6^#	0.45	320	0.97	1.025	162	27
7^#	0.45	360	0.97	1.025	162	27
8^#	0.45	400	0.97	1.025	162	27

纺纱速度/ (m·min^-1)	螺旋包缠角		螺距
纺纱速度/ (m·min^-1)	平均值/ (°)	CV值/ %	平均值/ μm	CV值/ %
280	30.2	7.7	644.0	7.2
320	30.1	7.1	756.7	10.4
360	28.6	8.1	881.3	10.0
400	26.1	13.2	962.0	8.3

纺纱速度/ (m·min^-1)	螺旋包缠角		螺距
纺纱速度/ (m·min^-1)	平均值/ (°)	CV值/ %	平均值/ μm	CV值/ %
280	30.2	7.7	644.0	7.2
320	30.1	7.1	756.7	10.4
360	28.6	8.1	881.3	10.0
400	26.1	13.2	962.0	8.3

纺纱速度/(m·min^-1)	断裂比强度		断裂伸长率		弹性模量
纺纱速度/(m·min^-1)	平均值/(cN·tex^-1)	CV值/%	平均值/%	CV值/%	平均值/(cN·tex^-1)	CV值/%
280	23.28	10.32	10.17	7.80	32.60	8.95
320	23.18	9.30	9.85	7.29	30.06	8.59
360	22.98	6.54	9.83	5.18	31.08	6.77
400	22.52	12.77	9.23	13.67	31.36	11.22

纺纱速度/(m·min^-1)	断裂比强度		断裂伸长率		弹性模量
纺纱速度/(m·min^-1)	平均值/(cN·tex^-1)	CV值/%	平均值/%	CV值/%	平均值/(cN·tex^-1)	CV值/%
280	23.28	10.32	10.17	7.80	32.60	8.95
320	23.18	9.30	9.85	7.29	30.06	8.59
360	22.98	6.54	9.83	5.18	31.08	6.77
400	22.52	12.77	9.23	13.67	31.36	11.22