Patent ID: 6053719
Filing Date: 2000-04-25
Classification: D04H,Y10T

Abstract:
An apparatus for manufacturing a spun nonwoven fabric comprising:a stretching device adapted to receive filaments;at least one spinneret drive, having a first portion with a first plurality of spinning orifices and a second portion with a second plurality of spinning orifices, and a continuous transition portion having a varying distribution of said first and second plurality of spinning orifices, the at least one spinneret device arranged above the stretching device;a transport device located beneath the stretching device for receiving the filaments to form the nonwoven fabric, the transport device having a horizontally and linearly moving collector belt defining a transport direction,wherein the first and second plurality of spinning orifices of the at least one spinneret device face toward the collector belt;wherein the first plurality of spinning orifices discharge a monofilament; andwherein the second plurality of spinning orifices discharge a bicomponent filament, such that when viewed in the transport direction of the collector belt, a projection of the plurality of spinning orifices onto a plane of the collector belt corresponds to the concentration profile of the filaments in a vertical cross section of the nonwoven fabric, and such that, viewed in the transport direction of the collector belt, the filaments which impact the collector belt first are the filaments of a first outward-facing surface of the nonwoven fabric, and wherein, in continuous transition, the filaments which impact the collector belt next are the filaments of inner regions of the nonwoven fabric, and wherein, in continuous transition the filaments which impact the collector belt last are the filaments of a second outward-facing surface of the nonwoven fabric.