Method of forming a web of melt blown layered fibers

DETAILED DESCRIPTION The present invention is directed to a process for producing a non-woven web of longitudinally layered melt-blown microfibers.
The microfibers are produced by a process comprising first feeding separate polymer melt streams to a manifold means, optionally separating at least one of the polymer melt streams into at least two distinct streams, and combining all the melt streams, including the separated streams, into a single polymer melt stream of longitudinally distinct layers, preferably of two different polymeric materials arrayed in an alternating manner.
The combined melt stream is then extruded through fine orifices and formed into a web of melt-blown microfibers.