Hot Drawing Behavior of High Speed Melt Spinning. Part 1. Fundamental analysis of hot drawing in spinline and introduction of basic equations for simulation.

Abstract

In a polymer processing system using Spinline Heating Spinning (SHS) technique, the conven tional drawing process can be omitted. The SHS process is characterized by the presence of a heating de vice located between the spinneret point and the take-up point. Drawing was conducted in the heating zone at lower spinning tension and higher temperature in comparison with the conventional spin-draw process. Unlike the conventional drawing system, the draw ratio can be regarded as an out-put variable in this pro cess. Along with the experimental clarification of the behavior of SHS, the basic equations including the drawing behavior in the heating device were introduced for the numerical analysis. The agreement between calculated and experimental results for various take-up velocities and heating conditions were sufficient. The physical properties of fibers obtained by SHS were intermediate between those of high-speed spun fi bers and conventionally drawn fibers. The structural characteristics of SHS fibers were also clarified.