Patent ID: 6572803
Filing Date: 2003-06-03
Classification: D01D

Abstract:
A method of infusing liquid dyestuff into synthetic yarns at the point of fiber production, comprising the steps of:(a) providing a molten polymer, at least one non-molten liquid dye, and a spin pack assembly adapted for receiving and mixing said molten polymer and said non-molten liquid dye therein to form a colored molten polymer composition, said spin pack assembly including a screen for filtering the molten polymer therethrough, and a spinneret adapted for receiving and extruding said molten polymer composition therethrough to form a plurality of colored fibers adapted for being formed into said synthetic yarns; (b) metering said liquid dye and said molten polymer into the spin pack assembly upstream from said spinneret; (c) mixing the liquid dye and the molten polymer together between said screen and the spinneret within the spin pack assembly, thereby forming said colored molten polymer composition; and (d) extruding the polymer composition through the spinneret, thereby forming said colored fibers.