Patent ID: 7398583
Filing Date: 2008-07-15
Classification: D04H

Abstract:
1. A method for hydrodynamic inclusion of a layer comprising a plurality of three-dimensional finite products between at least two nonwovens comprising: providing a first nonwoven fabric; consolidating the first nonwoven fabric with liquid jets emerging continuously and uniformly over a working width of a nozzle bar, by spraying a liquid under pressure from fine nozzle openings arranged in a row from at least one nozzle strip extending over the working width of at least one nozzle bar towards the first nonwoven fabric which is moving ahead of the nozzle bar such that the first nonwoven fabric is initially consolidated over its entire surface using water jets; laying a plurality three-dimensional finite products on the consolidated first nonwoven fabric; covering the plurality of three-dimensional finite products with a second nonwoven fabric which has been consolidated over its entire surface using water jets to provide a composite comprising the first nonwoven fabric which has been consolidated over its entire surface, the plurality of three-dimensional finite products and the second nonwoven fabric which has been consolidated over its entire surface; and subjecting the composite to hydrodynamic needling uniformly over its working width to join the first and second nonwoven fabrics together.