Patent ID: 6782589
Filing Date: 2004-08-31
Classification: B32B,D04H

Abstract:
A method for making a degradable laminate nonwoven fabric having regions of dissimilar bundling, comprising the steps of:a) providing a first nonwoven layer on a moving support movable in a machine direction; b) providing a second nonwoven layer; said second nonwoven layer overlying said first nonwoven layer on said moving support; and c) pattern hydroentangling said first and second nonwoven layers to one another to form a laminate nonwoven fabric; said pattern hydroentangling comprising: i) providing a first manifold having a plurality of jet clusters therein; each of said iet clusters having a plurality of individual jet orifices therein, each of said individual iet orifices within each of said iet clusters being separated from one another by a first distance, said jet clusters being spaced aoart from one another transversely of said machine direction by a second distance areater than said first distance, ii) conveying said moving support under said first manifold in a direction coincident with said machine direction; whereby streams of water from each of said individual jet orifices will be directed onto said first and second nonwoven layers to thereby laminate them to one another to form said laminate nonwoven fabric havina regions of dissimilar bundling wherein said regions are spaced apart from each other transversely of said machine direction by an amount corresponding to said second distance.