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LSP Institute of Polymer Materials

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  2. research
  3. melt spinning of polymer fibers
  4. material modeling for process instabilities

material modeling for process instabilities

In page navigation: research
  • biomedical applications
    • biofabrication
    • ventricular assist device
    • silicone breast implants
    • ophthalmology
  • (Nano-) composites and blends
    • biaxial stretching of particle filled films
    • conductive polymer composites
      • Recent results
    • morphology development and strain
  • melt spinning of polymer fibers
    • material modeling for process instabilities
    • molecular and rheological characterization
    • pilot plant melt spinning
    • meltblowing
    • characterisation of nonwovens
  • simulation
    • simulation 2020 news
    • simulation 2019
  • electro-spinning

material modeling for process instabilities

For the theoretical description of the fiber spinning process, the laws of hydrodynamics, such as continuity equation or momentum conservation, are linked to a material law, the constitutive equation. The resulting system of partial differential equations represents the center of the mathematical analysis.

Experimental studies show that the spinning process becomes unstable at a certain take-off speed, which means that both the cross-sectional and velocity profiles of the fiber begin to oscillate. This critical extraction ratio is material dependent. For the optimization of the process stability, it is therefore very interesting to theoretically investigate the stability of the differential equations describing the system and to establish a relationship with material parameters that are relevant in practice. In addition to studying various instability prediction methods, material models must be designed that correctly describe the experimental data. For this purpose, in addition to experiments under industrial conditions, knowledge from the molecular and rheological characterization will help.

 

Institute of Polymer Materials
FAU Erlangen-Nuremberg

Martensstraße 7
91058 Erlangen
Germany
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