Method for forming laminate nonwoven fabric

A method for making a degradable laminate nonwoven fabric with 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 separated from each other transversely of said machine direction by a first distance;
• each of said jet clusters having a plurality of individual jet orifices therein;
• each of said individual jet orifices within each of said jet clusters separated from one another by a second distance that is greater than said first distance wherein said second distance is at least twice said first distance;
• ii) conveying said moving support under said first manifold in 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 having 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.

A method for making a degradable laminate nonwoven fabric having regions of dissimilar bundling, comprising:

• a) hydroentangling a first nonwoven layer, said first nonwoven layer comprised of viscose rayon, said first nonwoven layer hydroentangled with an entanglement energy of between about 175 kj/kg and 1500 kj/kg, placing said first nonwoven layer on a moving support;
• b) hydroentangling a second nonwoven layer, said second nonwoven layer comprising pulp;
• overlying said second nonwoven layer over said first nonwoven layer on said moving support movable in a machine direction;
• c) hydroentangling a third nonwoven layer, said third nonwoven layer comprised of viscose rayon, said third nonwoven layer entangled with an entanglement energy of between about 175 kj/kg and 1500 kj/kg, placing said third nonwoven layer over said second layer on said moving support;
• and
• d) pattern hydroentangling said first, second, and third layers to one another to form a laminate nonwoven fabric;
• said pattern hydroentangling comprising:
• i) providing a first manifold having a plurality of jet groupings therein, each of said jet groupings having a plurality of individual jet orifices, said individual jet orifices within one of said jet groupings separated from one another by at least a first distance;
• each of said jet groupings being separated from one another by a second distance, said second distance being at least twice said first distance;
• ii) conveying said moving support under said first manifold, directing water through said first manifold individual jet orifices onto said first, second and third nonwoven layers whereby said first, second and third nonwoven layers will be laminated to one another to form said laminate nonwoven fabric having 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.