METHOD FOR MELT-SPINNING DRAWING AND WINDING UP A MULTIFILAMENT AND APPARATUS FOR CARRYING OUT SAID METHOD

摘要

The present invention relates to a method for melt-spinning, drawing and winding multi-filaments to form a fully drawn yarn (FDY) as well as an apparatus for carrying out the method. According to the present invention, first, a plurality of filaments are extruded from the thermoplastic melt, cooled to a temperature lower than the glass transition temperature of the thermoplastic material, and joined into the filament bundle without supplying a finishing fluid. The filament bundle is rolled at a speed exceeding 1,500 m / min, heated to a temperature exceeding the glass transition temperature of the thermoplastic material, and drawn at a drawing speed exceeding 4,000 m / min. The filament bundle is then finished using the finishing fluid, and the thread is wound into the package. According to the present invention, the finishing device is disposed in the threaded operating area between the winding device and the drawing device of the device, and the thread has a thread running speed in the area exceeding 4,000 m / min. The apparatus and method according to the invention thus form an effectively optimized process for producing a fully drawn yarn.