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1. WO2020112968 - MATÉRIAUX NON TISSÉS TRIDIMENSIONNELS ET PROCÉDÉS DE FABRICATION DE CEUX-CI

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:

1. A nonwoven material comprising a plurality of fibers and extending along a longitudinal direction between a first material end and a second material end, the nonwoven material comprising: a first surface and a second surface, the first surface being opposite from the second surface; an apertured zone, the apertured zone comprising:

a plurality of nodes extending away from a base plane on the first surface, a plurality of connecting ligaments interconnecting the plurality of nodes, wherein a majority of the plurality of nodes include at least three connecting ligaments connecting to adjacent nodes, and

a plurality of openings; and

wherein the apertured zone comprises a lane of nodes which extends substantially in the longitudinal direction, and wherein the lane of nodes extending substantially in the longitudinal direction is formed of longitudinally adjacent nodes which are aligned such that lines drawn between centers of longitudinally adjacent nodes within the lane of nodes each form an angle with respect to the longitudinal direction of less than about 20 degrees.

2. The nonwoven material of claim 1 , wherein the apertured zone has a longitudinal length, and wherein the lane of nodes extending substantially in the longitudinal direction extends for at least 25% of the apertured zone longitudinal length.

3. The nonwoven material of claim 1 , wherein the apertured zone has a longitudinal length, and wherein the lane of nodes extending substantially in the longitudinal direction extends for at least 50% of the apertured zone longitudinal length.

4. The nonwoven material of claim 1 , wherein the apertured zone has a longitudinal length, and wherein the lane of nodes extending substantially in the longitudinal direction extends for at least 80% of the apertured zone longitudinal length.

5. The nonwoven material of claim 1 , wherein the apertured zone comprises a plurality of laterally spaced lanes of nodes which extend substantially in the longitudinal direction.

6. The nonwoven material of claim 1 , wherein:

the apertured zone has an apertured zone width;

the apertured zone comprises a number of lanes of nodes which extend substantially in the longitudinal direction; and

a lane number ratio value, which is determined by dividing the apertured zone width, in millimeters, by the number of lanes of nodes which extend substantially in the longitudinal direction, is greater than about 4 and less than about 15.

7. The nonwoven material of claim 6, wherein the lane number ratio is greater than about 5 and less than about 12.

8. The nonwoven material of claim 1 , wherein a majority of the plurality of nodes of the nonwoven material are disposed within lanes of nodes which extend substantially in the longitudinal direction.

9. The nonwoven material of claim 1 , wherein the openings provide a percent open area for the apertured zone that is greater than about 15%, as determined by the Material Sample Analysis Test Method.

10. The nonwoven material of claim 1 , further comprising a first side zone and a second side zone, the first side zone and the second side zone each extending between the first material end and the second material end and each having a percent open area greater than about 0.5% and less than the percent open area of the apertured zone, as determined by the Material Sample Analysis Test Method.

11. The nonwoven material of claim 10, wherein the nonwoven material has a material width and the first side zone has a first side zone width and the second side zone has a second side zone width, and wherein each of the first side zone width and the second side zone width are between about 5% and about 25% of the nonwoven material width.

12. The nonwoven material of claim 10, wherein the first side zone has a first side zone width and the second side zone has a second side zone width, and wherein the value of the first side zone width is within about 50% of the value of the second side zone width.

13. A nonwoven material comprising a plurality of fibers and extending between a first material end and a second material end, the nonwoven material comprising:

a first surface and a second surface, the first surface being opposite from the second surface; and

an apertured zone, the apertured zone comprising:

a plurality of nodes extending away from a base plane on the first surface, a plurality of connecting ligaments interconnecting the plurality of nodes, wherein a majority of the plurality of nodes include at least three connecting ligaments connecting to adjacent nodes, and

a plurality of openings;

wherein the apertured zone comprises a plurality of laterally adjacent nodes, and

wherein, for a majority of laterally adjacent node pairs within the apertured zone, a line drawn between centers of a pair of laterally adjacent nodes forms an angle with respect to the lateral direction that is greater than about 10 degrees and less than about 35 degrees.

14. The nonwoven material of claim 13, wherein, for a majority of laterally adjacent node pairs within the apertured zone, a line drawn between centers of a pair of laterally adjacent nodes forms an angle with respect to the lateral direction that is greater than about 10 degrees and less than about 25 degrees.

15. The nonwoven material of claim 13, wherein the apertured zone further comprises a lane of nodes which extends substantially in the longitudinal direction, and wherein the lane of nodes extending substantially in the longitudinal direction is formed of longitudinally adjacent nodes which are aligned such that lines drawn between centers of longitudinally adjacent nodes within the lane of nodes each form an angle with respect to the longitudinal direction of less than about 20 degrees.

16. The nonwoven material of claim 15, wherein the apertured zone comprises a plurality of laterally spaced lanes of nodes which extend substantially in the longitudinal direction.

17. The nonwoven material of claim 13, wherein the openings provide a percent open area for the apertured zone that is greater than about 15%, as determined by the Material Sample Analysis Test Method, and wherein the material further comprises a first side zone and a second side zone, the first side zone and the second side zone each extending between the first material end and the second material end where each of the first side zone and the second side zone have a percent open area greater than about 0.5% and less than a percent open area of the apertured zone, as determined by the Material Sample Analysis Test Method.

18. A nonwoven material comprising a plurality of fibers and extending between a first material end and a second material end, the nonwoven material comprising:

a first surface and a second surface, the first surface being opposite from the second surface; and

an apertured zone, the apertured zone comprising:

a plurality of nodes extending away from a base plane on the first surface, a plurality of connecting ligaments interconnecting the plurality of nodes, wherein a majority of the plurality of nodes include at least three connecting ligaments connecting to adjacent nodes, a first plurality of the connecting ligaments connecting longitudinally adjacent nodes and a second plurality of the connecting ligaments connecting laterally adjacent nodes, and

a plurality of openings;

wherein the first plurality of connecting ligaments comprise an anisotropy of greater than 1.3 and the second plurality of connecting ligaments comprise an anisotropy of less than about 1.1.

19. The nonwoven material of claim 19, wherein the first plurality of connecting ligaments comprise an anisotropy of greater than 1.4 and the second plurality of connecting ligaments comprise an anisotropy of less than about 1.08.

20. The nonwoven material of claim 19, wherein each connecting ligament extends between only two adjacent nodes.