Apertured laminate and method of making
A perforated laminate comprising at least first and second layers and apertures extending through at least the first layer. The first layer is a nonwoven or formed film material, and the second layer comprises an absorbent structure. The at least first and second layers are primarily joined at the periphery of the perforated apertures. The laminate is particularly useful as a topsheet for an absorbent article, such as a disposable diaper or sanitary napkin. Also described are various materials and methods used to create such laminates.
1. A perforated laminate that comprises at least first and second layers and perforated apertures that extend through at least the first layer, said first layer being (1) a nonwoven that has filaments from about 0.2 to about 15 dpf, or (2) a formed film that has a basis weight of from about 15 to about 50 gsm, said second layer comprising a fibrous nonwoven absorbent structure having a median wet pore diameter between about 3 microns and about 50 microns, wherein the at least first and second layers are primarily joined at the periphery of the perforated apertures, the perforated apertures have walls that have micropores having a median wet pore size less than about 10 microns, and the laminate has a drape test value of from about 30 mm to about 90 mm.
2. A perforated laminate according to claim 1 wherein the first layer has a flocked surface.
3. A perforated laminate according to claim 1 wherein the first layer is a nonwoven comprising filaments of from about 1 to about 10 dpf.
4. A perforated laminate according to claim 1 wherein the first layer is a nonwoven that has a basis weight of between about 8 and about 45 gsm.
5. A perforated laminate according to claim 1 wherein the first layer is a formed film that has a basis weight of between about 18 and about 30 gsm.
6. A perforated laminate according to claim 1 wherein the first layer is a formed film that has a mesh of between about 40 and about 120 holes per linear inch.
7. A perforated laminate according to claim 1 wherein the second layer has a basis weight of between about 8 and about 70 gsm.
8. A perforated laminate according to claim 1 wherein the second layer comprises reticulated foam, wetlaid tissue, airlaid tissue, or a nonwoven.
9. A perforated laminate according to claim 1 further comprising a third nonwoven layer below the second layer and having a basis weight between about 8 and about 45 gsm.
10. A perforated laminate according to claim 2 wherein the first layer is a nonwoven that has a basis weight of between about 8 and about 45 gsm, the second layer has a basis weight of between about 8 and about 70 gsm.
11. An absorbent article comprising a perforated laminate that comprises at least first and second layers and perforated apertures that extend through at least the first layer, said first layer being (1) a nonwoven that has filaments from about 0.2 to about 15 dpf, or (2) a formed film that has a basis weight of from about 15 to about 50 gsm, said second layer comprising a fibrous nonwoven absorbent structure having a median wet pore diameter between about 3 microns and about 50 microns, wherein the at least first and second layers are primarily joined at the periphery of the perforated apertures, the perforated apertures have walls that have micropores having a median wet pore size less than about 10 microns, and the laminate has a drape test value of from about 30 mm to about 90 mm.
12. An absorbent article according to claim 11 wherein the first layer is a nonwoven comprising filaments of from about 1 to about 10 dpf.
13. An absorbent article according to claim 11 wherein the first layer is a nonwoven that has a basis weight of between about 8 and about 45 gsm.
14. An absorbent article according to claim 11 wherein the first layer is a formed film that has a basis weight of between about 18 and about 30 gsm.
15. An absorbent article according to claim 11 wherein the first layer is a formed film that has a mesh of between about 40 and about 120 holes per linear inch.
16. An absorbent article according to claim 11 wherein the second layer has a basis weight of between about 8 and about 70 gsm.
17. An absorbent article according to claim 11 wherein the second layer comprises reticulated foam, wetlaid tissue, airlaid tissue, or a nonwoven.
18. An absorbent article according to claim 11 further comprising an absorbent layer and a backsheet.
19. An absorbent article according to claim 18 wherein the first layer is a nonwoven that has a basis weight of between about 8 and about 45 gsm, and the second layer has a basis weight of between about 8 and about 70 gsm.
20. A method for making a perforated laminate, said method comprising providing a first layer being (1) a nonwoven that has filaments of from about 0.2 to about 15 dpf, or (2) a formed film that has a basis weight of at least about 15 to about 50 gsm; providing a second layer comprising a fibrous nonwoven absorbent structure having a median wet pore diameter between about 3 microns and about 50 microns; and feeding said first layer and second layer through perforating rolls to perforate apertures through at least the first layer; wherein the at least first and second layers are primarily joined at the periphery of the perforated apertures, the perforated apertures have walls that have micropores having a median wet pore size less than about 10 microns, and the laminate has a drape test value of from about 30 mm to about 90 mm.
21. A method for making a perforated laminate according to claim 20 wherein the first layer is a nonwoven comprising filaments of from about 1 to about 10 dpf and having a basis weight of between about 8 and about 45 gsm, and the second layer has a basis weight of between about 8 and about 70 gsm.
22. A method for making a perforated laminate according to claim 20 wherein the micropores form on the perforated aperture walls as a result of feeding said first layer and second layer through perforating rolls to perforate apertures through at least the first layer.