Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (01): 30-34.doi: 10.13475/j.fzxb.20200600505

• Fiber Materials • Previous Articles     Next Articles

Numerical simulation of interface distribution of side-by-side bi-component melt in orifice

LIAO He1,2, WANG Jianning3, ZHANG Dongjian2, GAN Xuehui1,2(), ZHANG Yumei3, WANG Huaping3   

  1. 1. Shanghai Collaborative Innovation Center for High Performance Fiber Composites, Shanghai 201620, China
    2. College of Mechanical Engineering, Donghua University, Shanghai 201620, China
    3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
  • Received:2020-06-01 Revised:2020-10-08 Online:2021-01-15 Published:2021-01-21
  • Contact: GAN Xuehui E-mail:xuehuig@dhu.edu.cn

RichHTML

4

PDF (PC)

254

Abstract:

In order to discover the cause for performance instability from interfacial deformation and displacement in side-by-side bi-component fibers, the finite element method was used to simulate the flow of polyethylene terephthalate (PET)/polyamide 6(PA6) polymer melt in the spinneret orifice. According to the results of numerical calculation, the interface changes of parallel flow under different conditions are obtained, and the effects of melt viscosity, inlet flow rate and flow length on the interface position and shape were analyzed. The results show that the interfacial deformation and deviation of the side-by-side bi-component melt occur in the spinneret orifice and that the low-viscosity component tends to wrap the high-viscosity component, whereas the interface change of the melt along the flow direction tends to be stable within a short distance. As the melt viscosity ratio increases, the interface shifts to the low viscosity component and the interface curvature increases. The difference of the inlet flow rate will cause the interface deviation, which will increase with the increase of the flow ratio.

Key words: side-by-side bi-component spinning, interface distribution of melt, polyethylene terephthalate, polyamide 6

CLC Number: 

  • TS151

Fig.1

Schematic diagram of bicomponent side-by-side composite spinning. (a) Spinning channel;(b) Geometry model"

Fig.2

Cross section of side by side simulation"

Fig.3

Shear rate distribution along y direction of cross section"

Fig.4

Viscosity contour of melt in channel"

Fig.5

Interface distribution along flow direction"

Tab.1

Viscosity of bi-component melt"

ηPET/(Pa·s) ηPA6/(Pa·s) ηPA6/ηPET
132 145 1.1
132 198 1.5
132 264 2.0

Fig.6

Interface position distribution with different viscosity ration"

Tab.2

Flow rate of bi-component melt"

QPET/(m3·s-1) QPA6/(m3·s-1) QPET/ QPA6
2×10-8 2×10-8 1.00
2.5×10-8 2×10-8 1.25
3×10-8 2×10-8 1.50

Fig.7

Interface position distribution with different flow rate ratio"

Fig.8

Shear rate distribution along y direction of cross section with different flow rate ratio"

[1] 李明明, 陈烨, 李夏, 等. 纺丝工艺对并列复合聚酯纤维性能的影响[J]. 纺织学报, 2019,40(12):16-20.
LI Mingming, CHEN Ye, LI Xia, et al. Influence of spinning process on property of parallel composite polyester fiber[J]. Journal of Textile Research, 2019,40(12):16-20.
[2] WANG L, FU X M, HE J Q, et al. Application challenges in fiber and textile electronics[J]. Advanced Materials, 2020,32(5):1-25.
[3] 王宇, 吉鹏, 王朝生, 等. PEGT/PTT并列复合弹性纤维的制备及性能研究[J]. 合成纤维工业, 2020,43(2):19-25.
WANG Yu, JI Peng, WANG Chaosheng, et al. Preparation and properties of PEGT/PTT side-by-side composite elastic fiber[J]. China Synthetic Fiber Industry, 2020,43(2):19-25.
[4] AYAD E, CAYLA A, RAULT F, et al. Effect of viscosity ratio of two immiscible polymers on morphology in bicomponent melt spinning fibers[J]. Advances in Polymer Technology, 2016,54(7):718-727.
[5] CHO H H, KIM K H, KANG Y A, et al. Fine structure and physical properties of poly(ethyleneterephthalate)/polyethylene bicomponent fibers in high-speed spinning: II: poly(ethylene terephthalate) sheath/polyethylene core fibers[J]. Journal of Applied Polymer Science, 2000,77(10):2267-2277.
[6] 王磊, 刘婷婷, 纪俊洋, 等. 三组分复合纺丝组件设计关键技术研究[J]. 合成纤维工业, 2013,36(6):48-51.
WANG Lei, LIU Tingting, JI Junyang, et al. Key technology of designing spinning pack for three-component composite spinning process[J]. China Synthetic Fiber Industry, 2013,36(6):48-51.
[7] 张敏, 黄传真, 孙胜, 等. 基于三维有限元模拟的聚合物复合型材共挤出过程分析[J]. 高分子材料科学与工程, 2009,25(10):98-101.
ZHANG Min, HUANG Chuanzhen, SUN Sheng, et al. The analysis of polymer profile coextrusion processes based on the three-dimensional finite element simula-tion[J]. Polymer Materials Science & Engineering, 2009,25(10):98-101.
[8] BORZACCHIELLO D, LERICHE E, BLOTTIERE B, et al. On the mechanism of viscoelastic encapsulation of fluid layers in polymer coextrusion[J]. Journal of Rheology, 2014,58(2):493-512.
[9] HUNTINGTON B A, CHABERT E, RAHAL S, et al. Distortion of interfaces in a multilayer polymer co-extrusion feedblock[J]. International Polymer Processing Journal of the Polymer Processing Society, 2013,28(3):274-280.
[10] WANG L, JI J Y, LIU T T, et al. Numerical study on forming process of the PET/PA6 component melt in micro hole in composite spinning[J]. Journal of Donghua University, 2013(30):5-13.
[11] 叶贺, 潘俊, 张荣根, 等. PA6/PET扁平复合纤维界面分布的数值模拟[J]. 合成纤维工业, 2017,40(6):5-9.
YE He, PAN Jun, ZHANG Ronggen, et al. Numerical simulation of PA6/PET flat composite fiber interface distribution[J]. China Synthetic Fiber Industry, 2017,40(6):5-9.
[1] DUO Yongchao, QIAN Xiaoming, ZHAO Baobao, QIAN Yao, ZOU Zhiwei. Preparation and properties of microfiber synthetic leather base [J]. Journal of Textile Research, 2020, 41(09): 81-87.
[2] GUO Zengge, JIANG Zhaohui, JIA Zhao, PU Congcong, LI Xin, CHENG Bowen. Influence of pressure on rheological behavior of polyethylene terephthalate-polyamide 6 copolymer/polyamide 6 blends [J]. Journal of Textile Research, 2019, 40(12): 27-31.
[3] ZHANG Jiao, GAO Xuefeng, WANG Yuzhou, LIU Haihui, ZHANG Xingxiang. Preparation and properties of polyamide 66/amino-functionalized multi-walled carbon nanotubes fibers [J]. Journal of Textile Research, 2019, 40(11): 1-8.
[4] PAN Weinan, XIANG Hengxue, ZHAI Gongxun, NI Mingda, SHEN Jiaguang, ZHU Meifang. Influence of relative molecular weight of copolyamide 6/66 on crystallization and rheological properties thereof [J]. Journal of Textile Research, 2019, 40(09): 8-14.
[5] . Analysis on components properties of alkali-soluble polyester/polyamide 6 sea island fiber [J]. Journal of Textile Research, 2018, 39(09): 15-21.
[6] . Preparation and performance of pentaerythritol phosphate/zine diethyl phosphate synergistic flame retardant polyamide 6 [J]. Journal of Textile Research, 2018, 39(09): 8-14.
[7] . Effect of combined anti-dripping additive on properties of flame resistant polyester [J]. JOURNAL OF TEXTILE RESEARCH, 2018, 39(08): 15-21.
[8] . Preparation and properties of superhydrophobic conductive polyethylene terephthalate fabrics [J]. JOURNAL OF TEXTILE RESEARCH, 2018, 39(08): 88-94.
[9] . Testing and characterizing of filament breakage of multifilament yarn [J]. JOURNAL OF TEXTILE RESEARCH, 2018, 39(06): 29-35.
[10] . Preparation and characterization of sheath-core energy storage and thermo-regulated composite fibers of polyamide 6 [J]. JOURNAL OF TEXTILE RESEARCH, 2018, 39(04): 1-8.
[11] . Influence of softening treatment on properties of polyester/polyamide 6 hollow segmented-pie ultrafine fiber nonwovens [J]. JOURNAL OF TEXTILE RESEARCH, 2018, 39(03): 114-119.
[12] . Crystallization behavior of bio-based polyamide 56 fibers [J]. JOURNAL OF TEXTILE RESEARCH, 2017, 38(12): 7-13.
[13] . Preparation and characterization of electrospun polyamide 6 nanofibrous membranes [J]. JOURNAL OF TEXTILE RESEARCH, 2017, 38(03): 6-12.
[14] . Function finishing and anti-dripping property of polyethylene terephthalate fabbrie coated with graphene oxide [J]. JOURNAL OF TEXTILE RESEARCH, 2017, 38(02): 141-145.
[15] . Preparation and properties of electrospun composite material for high-efficiency ash filtration [J]. Journal of Textile Research, 2015, 36(07): 12-16.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
京ICP备14006648号
Copyright 2021 © Editorial office of Journal of Textile Research
Supported by Beijing Magtech Co.Ltd