Patent ID: 6773531
Filing Date: 2004-08-10
Classification: B29L,D01D,D01F

Abstract:
A process for preparing a plurality of multi-layered filaments from multiple thermoplastic synthetic polymers comprising:separately melting and extruding multiple thermoplastic synthetic polymers into separate molten polymer flow streams; passing each of said separate molten polymer flow streams into separate coat hanger manifolds to form a separate planar molten polymer flow stream of each of said polymers; then passing said separate planar molten polymer flow streams through separate filters to filter said planar molten polymer flow streams; feeding said separate planar molten polymer flow streams into a spinneret comprising a plurality of separate polymer flow passages, wherein each planar molten polymer flow stream is fed to a separate series of said polymer flow passages communicating with spinneret exit orifices, which passages are aligned such that multiple molten polymer flow streams emerging from said exit orifices are directed into contact with one another to form multi-layered filaments; and attenuating said multi-layered filaments so formed with fluid exiting fluid jets positioned adjacent said plurality of spinneret exit orifices.