THE SPINNING SIMULATION OF POLYPROPYLENE MELT SPINNING AND ITS BIREFRINGENCE

Simulation of Multifilament Semicrystalline Polymer Fiber Melt-Spinning

The goal of this effort is to provide an accurate simulation of multifilament fiber melt spinning, applicable for a wide range of material and process conditions. For ease of use, the model should run on a standard laptop or desktop computer in reasonable time (one hour or less). Most melt spinning models simulate the formation of a single filament, with little or no attention given to multifil...

Optimal Control of Melt Spinning Processes

An optimal control problem for a mathematical model of a melt spinning process is considered. Newtonian and non–Newtonian models are used to describe the rheology of the polymeric material, the fiber is made of. The extrusion velocity of the polymer at the spinneret as well as the velocity and temperature of the quench air serve as control variables. A constrained optimization problem is derive...

Effect of Melt Spinning Variables on the Structural Changes of Recycled and Bottle Grade Filament Yarn PET

Melt Spinning, Functionalization and Durability of Polyetheretherketone-Based Fibres

............................................................................................................................................ i Preface .............................................................................................................................................. ii List of publications ..................................................................................

Composite Fibers from Recycled Plastics Using Melt Centrifugal Spinning

New methods are being developed to enable the production of value-added materials from high-volume, low-cost feedstocks arising from domestic recycling streams. In this work, recycled bottle-grade polyethylene terephthalate, polystyrene, and polypropylene were spun into fibers from the melt using a centrifugal spinning technique. Mono-component fibers and 50/50 blends of each polymer and a 33/3...