Patent ID: 6551088
Filing Date: 2003-04-22
Classification: D01D,Y10S

Abstract:
A spin pack assembly for the production of hollow bicomponent filaments comprising:a distributor having a plurality of outer polymer flow passages for the flow of a first polymer and an inner polymer flow passage for the flow of a second polymer; a spinneret secured relative to said distributor and communicating with said distributor to receive the first and second polymers, wherein said spinneret includes a top face directed towards said distributor, an opposed bottom face and a plurality of holes extending from said top face to said bottom face, wherein said holes have a lower section which includes a plurality of apertures and wherein each of said apertures communicate substantially only with either said inner flow passage or at least one of said outer flow passages; and a shim secured between said distributor and said spinneret, said shim having a plurality of openings, each of said openings having adjacent first and second portions, wherein said first portion forms a continuous path from said outer flow passage, through said openings to said holes, and said second portion forms a continuous path from said inner flow passage, through said openings to said holes.