Liquid color feed system for synthetic yarns
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United States of America Patent
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Jun 3, 2003
Grant Date -
N/A
app pub date -
Sep 21, 2000
filing date -
Sep 21, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of infusing liquid dyestuff into synthetic yarns at the point of fiber production, comprising the steps of providing a molten polymer, at least one non-molten liquid dye, and a spin pack assembly adapted for receiving and mixing the molten polymer and the non-molten liquid dye therein to form a colored molten polymer composition. The spin pack assembly includes a screen for filtering the molten polymer therethrough, and a spinneret adapted for receiving and extruding the molten polymer composition therethrough to form a plurality of colored fibers adapted for being formed into the synthetic yarns. The method also includes the steps of metering the liquid dye and the molten polymer into the spin pack assembly upstream from the spinneret, mixing the liquid dye and the molten polymer together between the screen and the spinneret within the spin pack assembly, thereby forming said colored molten polymer composition; and extruding the polymer composition through the spinneret, thereby forming the colored fibers.
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