초록 ▼

The high speed melt spinning of synthetic polymer fibers is provided with on-line zone heating and cooling by which the strand emerging from the spinneret is initially cooled to an optimum temperature above the glass transition point of the polymer, the maintained near that temperature for a period

The high speed melt spinning of synthetic polymer fibers is provided with on-line zone heating and cooling by which the strand emerging from the spinneret is initially cooled to an optimum temperature above the glass transition point of the polymer, the maintained near that temperature for a period of time to promote development of desirable fiber properties such as crystallization and crystal orientation, and then finally cooled below the solidification point for take up.

대표청구항 ▼

A high speed melt spinning process for producing textile fibers having improved physical properties, comprising extruding a molten polymer from a spinneret to form continuous strands, directing the molten polymer strands from the spinneret into and through a first cooling zone and rapidly cooling th

A high speed melt spinning process for producing textile fibers having improved physical properties, comprising extruding a molten polymer from a spinneret to form continuous strands, directing the molten polymer strands from the spinneret into and through a first cooling zone and rapidly cooling the strands from the extrusion temperature to a predetermined optimum crystallization temperature range above the glass transition temperature of the strands, directing the strands from the first cooling zone into and through a heating zone and heating the strands so as to maintain the strands for a period of time at a temperature within said optimum crystallization temperature range, directing the strands from the heating zone to a second cooling zone and cooling and solidifying the strands, and taking up the strands at a high speed of 3000 meters per minute or greater.