Profiled multi-component fibers and method and apparatus for making same

Abstract From the Canadian patent

A method and apparatus for extruding a wide variety of plural-component fiber configurations in a spin pack utilizes one or more disposable distributor plates in which distributor flow paths are etched. The etching process permits very thin metal plates to be employed rendering the fabrication expense for the plates so small, relative to the remainder of the spin pack as, to justify discarding or disposing of the plates rather than periodically cleaning them. The etching process also permits the etched distribution paths to be such as to increase the fiber yield per given spinneret surface area. It also permits the distribution paths to be sufficiently small that the resulting extruded …