A liquid permeable substrate for an absorbent article is disclosed. The substrate includes a first layer including a hydrophobic material and a second layer including a hydrophilic material. The first layer is joined to the second layer. The substrate includes a plurality of recesses, a plurality of
A liquid permeable substrate for an absorbent article is disclosed. The substrate includes a first layer including a hydrophobic material and a second layer including a hydrophilic material. The first layer is joined to the second layer. The substrate includes a plurality of recesses, a plurality of projections, and a plurality of land areas. The land areas surround at least a majority of the plurality of projections and a plurality of the recesses. The plurality of recesses, the plurality of projections, and the plurality of land areas together form a first three-dimensional surface on a first side of the substrate and a second three-dimensional surface on a second side of the substrate. The substrate has an overall z-directional height in the range of about 1000 μm to about 6000 μm according to the Overall Substrate Height Test.
대표청구항▼
1. An absorbent article comprising: a central longitudinal axis;a liquid permeable topsheet;a backsheet; andan absorbent core positioned at least partially intermediate the topsheet and the backsheet, wherein the absorbent core comprises an absorbent material comprising at least 90% superabsorbent p
1. An absorbent article comprising: a central longitudinal axis;a liquid permeable topsheet;a backsheet; andan absorbent core positioned at least partially intermediate the topsheet and the backsheet, wherein the absorbent core comprises an absorbent material comprising at least 90% superabsorbent polymers by weight of the absorbent material;the topsheet comprising: a first layer comprising a hydrophobic nonwoven material, wherein the hydrophobic nonwoven material overlaps the central longitudinal axis of the absorbent article; anda second layer comprising a hydrophilic nonwoven material, wherein the first layer is joined to the second layer;wherein the topsheet comprises a plurality of recesses, a plurality of dome-shaped projections forming a portion of a wearer-facing surface of the topsheet, and a plurality of land areas, wherein the land areas surround at least a majority of the plurality of dome-shaped projections and a plurality of the recesses, wherein the plurality of recesses, the plurality of dome-shaped projections, and the plurality of land areas, together form a first three-dimensional surface on a first side of the topsheet and a second three-dimensional surface on a second side of the topsheet, wherein a majority of the projections have a z-directional height in the range of about 500 μm to about 4000 μm, according to the Projection Height Test, wherein a majority of the recesses define an aperture at a location most distal from a top peak of an adjacent dome-shaped projection and defined at a lowermost plane of the topsheet, and wherein the majority of the recesses have a z-directional height in the range of about 500 μm to about 2000 μm, according to the Recess Height Test; andwherein the topsheet has an overall z-directional height in the range of about 1000 μm to about 6000 μm, according to the Overall Substrate Height Test. 2. The absorbent article of claim 1, wherein the first layer forms a central longitudinal portion of the wearer-facing surface of the topsheet. 3. The absorbent article of claim 1, wherein the second layer forms a central longitudinal portion of a garment-facing surface of the topsheet. 4. The absorbent article of claim 1, wherein a majority of the apertures have an effective aperture area in the range of about 0.5 mm2 to about 3 mm2, according to the Aperture Test. 5. The absorbent article of claim 1, wherein the topsheet has a % effective open area in the range of about 5% to about 25%, according to the Aperture Test. 6. The absorbent article of claim 1, wherein the dome-shaped projections and the recesses are each formed by portions of the first layer and portions of the second layer. 7. The absorbent article of claim 1, wherein the first layer is joined to the second layer by adhesive bonding or mechanical bonding. 8. The absorbent article of claim 1, wherein the first layer is joined to the second layer by passing heated air through the topsheet. 9. The absorbent article of claim 1, wherein the first layer comprises a plurality of first fibers, wherein the second layer comprises a plurality of second fibers, and wherein the first and second fibers are different. 10. The absorbent article of claim 1, wherein four apertures are formed around each dome-shaped projection. 11. The absorbent article of claim 1, wherein four dome-shaped projections are formed around each aperture. 12. The absorbent article of claim 1, wherein two adjacent apertures are separated by a dome-shaped projection and a land area along a lateral axis of the topsheet, and wherein two adjacent dome-shaped projections are separated by an aperture and a land area along the lateral axis of the topsheet. 13. The absorbent article of claim 1, wherein two adjacent apertures are separated by a dome-shaped projection and a land area along a longitudinal axis of the topsheet, and wherein two adjacent dome-shaped projections are separated by an aperture and a land area along the longitudinal axis of the topsheet. 14. The absorbent article of claim 1, wherein substantially all of the recesses define an aperture at the lowermost plane of the topsheet. 15. The absorbent article of claim 1, wherein substantially all of the dome-shaped projections comprise a hollow arched portion. 16. The absorbent article of claim 1, wherein the apertures comprise a first set of apertures together forming a first line in the topsheet and a second set of apertures together forming a second line in the topsheet, and wherein the first line is generally parallel with the second line. 17. The absorbent article of claim 1, wherein the apertures are formed through the first layer and the second layer. 18. The absorbent article of claim 1, wherein top peaks of the majority of the dome-shaped projections form a topmost plane of the topsheet, and wherein the land areas are positioned intermediate the lowermost plane and the topmost plane. 19. The absorbent article of claim 1, wherein the first three-dimensional surface has a geometric roughness value in the range of about 3.0 to about 3.6, according to the Descriptive Analysis Roughness Test. 20. The absorbent article of claim 1, wherein a ratio of the z-directional height of the majority of the projections to a % effective open area of the topsheet is in the range of about 95 to about 150. 21. The absorbent article of claim 1, wherein the absorbent article has a relative humidity from about 50% to about 70%, according to the Humidity Test, and wherein the topsheet has a basis weight in the range of about 30 gsm to about 40 gsm, according to the Basis Weight Test herein. 22. The absorbent article of claim 1, wherein the first layer comprises fibers that are at least 0.5 denier greater than denier of fibers of the second layer. 23. The absorbent article of claim 22, wherein the first layer comprises fibers having a denier in the range of about 2 to about 4, and wherein the second layer comprises fibers having a denier in the range of about 1.5 to about 3. 24. The absorbent article of claim 1, wherein the first layer has a higher basis weight than the second layer. 25. The absorbent article of claim 1, wherein the first layer has a basis weight in the range of at least 1 to about 3 times greater than a basis weight of the second layer. 26. The absorbent article of claim 1, comprising an outer cover that has the same or a similar appearance as the liquid permeable topsheet. 27. The absorbent article of claim 1, wherein the topsheet comprises cotton fibers. 28. The absorbent article of claim 1, wherein the plurality of dome-shaped projections all have substantially the same size. 29. The absorbent article of claim 28, wherein the plurality of dome-shaped projections all have substantially the same shape. 30. A package comprising a plurality of the absorbent articles of claim 1, wherein the package has an in-bag stack height from about 70 mm to about 95, according to the In-Bag Stack Height Test. 31. An absorbent article comprising: a central longitudinal axis;a topsheet;a backsheet; andan absorbent core positioned at least partially intermediate the topsheet and the backsheet, wherein the absorbent core comprises an absorbent material comprising at least 85% superabsorbent polymers by weight of the absorbent material;the topsheet comprising: a first layer comprising a hydrophobic nonwoven material; anda second layer comprising a hydrophilic nonwoven material, wherein the first layer is joined to the second layer, and wherein the first layer and the second layer are coterminous with each other;wherein the topsheet comprises a plurality of recesses, a plurality of dome-shaped projections forming a portion of a wearer-facing surface of the absorbent article, and a plurality of land areas, wherein the land areas surround at least a majority of the plurality of dome-shaped projections and a plurality of the recesses, wherein the plurality of recesses, the plurality of dome-shaped projections, and the plurality of land areas, together form a first three-dimensional surface on a first side of the topsheet and a second three-dimensional surface on a second side of the topsheet, wherein a majority of the dome-shaped projections have a z-directional height in the range of about 500 μm to about 4000 μm, according to the Projection Height Test, wherein a majority of the recesses define an aperture at a location most distal from a top peak of an adjacent dome-shaped projection, and wherein the majority of the recesses have a z-directional height in the range of about 500 μm to about 2000 μm, according to the Recess Height Test;wherein the topsheet has an overall z-directional height in the range of about 1000 μm to about 6000 μm, according to the Overall Substrate Height Test;wherein the dome-shaped projections and the recesses are formed by portions of the first layer and portions of the second layer; andwherein the apertures are formed through the first layer and through the second layer. 32. The absorbent article of claim 31, wherein four apertures are formed around each dome-shaped projection, and wherein four dome-shaped projections are formed around each aperture. 33. The absorbent article of claim 31, wherein the plurality of dome-shaped projections have substantially the same size and same shape, and wherein the plurality of recesses have substantially the same size and same shape. 34. The absorbent article of claim 31, wherein the substrate comprises cotton fibers. 35. An absorbent article comprising: a central longitudinal axis;a central lateral axis extending in a direction perpendicular to the central longitudinal axis;an absorbent core;a liquid impermeable backsheet;a liquid permeable topsheet, wherein the absorbent core is positioned at least partially intermediate the liquid permeable topsheet and the liquid impermeable backsheet, wherein the absorbent core comprises an absorbent material comprising at least 80% superabsorbent polymers by weight of the absorbent material, and wherein the liquid permeable topsheet comprises: a first layer comprising a hydrophobic nonwoven material, wherein the hydrophobic nonwoven material overlaps the central longitudinal axis; anda second layer comprising a hydrophilic nonwoven material, wherein the first layer is joined to the second layer, and wherein the hydrophilic nonwoven material overlaps the central longitudinal axis;wherein the topsheet comprises a plurality of recesses, a plurality of dome shaped projections forming a portion of a wearer-facing surface of the topsheet, and a plurality of land areas, wherein the land areas surround at least a majority of the plurality of dome-shaped projections and a plurality of the recesses, wherein the plurality of recesses, the plurality of dome-shaped projections, and the plurality of land areas, together form a first three-dimensional surface on a first side of the topsheet and a second three-dimensional surface on a second side of the topsheet, wherein a majority of the dome-shaped projections have a z-directional height in the range of about 500 μm to about 4000 μm, according to the Projection Height Test, wherein a majority of the recesses define an aperture at a location most distal from a top peak of an adjacent dome-shaped projection, wherein the aperture is defined at a lowermost plane of the topsheet, wherein top peaks of the dome-shaped projections form a topmost plane of the topsheet, wherein the land areas are positioned intermediate the lowermost plane and the topmost plane, and wherein the majority of the recesses have a z-directional height in the range of about 500 μm to about 2000 μm, according to the Recess Height Test; andwherein the topsheet has an overall z-directional height in the range of about 1000 μm to about 6000 μm, according to the Overall Substrate Height Test. 36. The absorbent article of claim 35, wherein the absorbent article is a diaper. 37. The absorbent article of claim 35, wherein the first layer is fully coterminous with the second layer. 38. The absorbent article of claim 35, wherein the topsheet comprises cotton fibers.
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