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Formation Analysis of the Core Offset of Sheath/Core Bicomponent Fiber Based on Numerical Simulation

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Abstract

Sheath/core bicomponent spinning can be utilized to produce functional fibers with high application value such as plastic optical fibers. The core offset configuration formed during spinning is to the detriment of the performance of the fibers. Owing to the limitation of the experiment that is difficult to disclose the formation mechanism of the core offset, numerical simulation was carried out to study the sheath/core interface distribution during spinning. The results showed that individual variations of the viscosity ratio and composition ratio will not lead to the core offset defect through an ideal channel. In the case of non-ideal channel structure, the flow rate unevenness of the sheath component and the coaxiality of the core tube and the orifice played major roles in the core offset configuration, while the effect of declination of the core tube can be negligible. The degree of core offset caused by the coupling effect of the flow rate unevenness of the sheath component and the coaxiality of the core tube and the orifice was equal to the linear superposition of the single effect. Based on the sheath/core axis deviation under different conditions, it was demonstrated that the core offset defect can be inhibited by reducing the proportion of the sheath component in any case, which has a guiding significance for the production of the sheath/core bicomponent fiber.

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Acknowledgements

Thanks for the support of the Fundamental Research Funds for the Central Universities (22D110122).

Funding

This work was supported by the Fundamental Research Funds for the Central Universities (22D110122).

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Authors and Affiliations

  1. Key Laboratory of High Performance Fibers & Products, Ministry of Education, Donghua University, Shanghai, 201620, China

    He Liao, Mingyuan Du & Xuehui Gan

  2. College of Mechanical Engineering, Donghua University, Shanghai, 201620, China

    He Liao & Xuehui Gan

  3. College of Materials Science and Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, China

    Yang Zhang, Yumei Zhang & Yue Zhang

Authors
  1. He Liao
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  2. Yang Zhang
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  3. Yumei Zhang
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  4. Mingyuan Du
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  5. Xuehui Gan
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  6. Yue Zhang
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Correspondence to Xuehui Gan or Yue Zhang.

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Liao, H., Zhang, Y., Zhang, Y. et al. Formation Analysis of the Core Offset of Sheath/Core Bicomponent Fiber Based on Numerical Simulation. Fibers Polym 24, 2209–2219 (2023). https://doi.org/10.1007/s12221-023-00190-z

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