Non-isothermal viscoelastic melt spinning with stress-induced crystallization: numerical simulation and parametric analysis

Abstract

This paper considers a model of melt spinning with stress-induced crystallization, where the melt uses the Phan Thien-Tanner model, and the solid adopts the rubber elastic model. We design a computationally efficient algorithm for solving the model. The temperature, radius, and birefringence profile in low-speed and high-speed spun PET fibers were predicted and compared with the published experimental data. The simulation results are consistent with the experimental data from the literature. Then a parametric analysis is conducted to investigate the effects of operating conditions on the spinning dynamics and reveal the relationship between the operating conditions and the final properties. The change of take-up speed has a significant influence on the crystallinity and birefringence of the fiber.

Model to Predict Polymer Fibre Diameter during Melt Spinning

“…The result of the presented research is a simple power law model to predict the fibre diameter during melt spinning and melt blowing, taking into consideration viscosity, die diameter, take-up air pressure, material throughput, and respective machine setup. In comparison to the complex simulations available for this process, (see, e.g., [30][31]), this gives a simple and practical tool for a first estimation of the fibre diameter. were dried for 12 hours at 80 °C and PET for 48 hours at 160 °C in a vacuum chamber as the polar groups encourage water absorption, which would negatively impact the spinnability.…”