Apertured outer cover for absorbent articles
View Patent ↗An outer cover for an absorbent article includes a nonwoven component having a plurality of apertures formed therein and a film bonded to the apertured nonwoven component. The apertures in the nonwoven component are formed by needling prior to the film being bonded to the nonwoven component. A method of making the outer cover includes feeding a web of nonwoven material to a needling station, needling the web of nonwoven material to form a plurality of apertures therein to define an apertured web of nonwoven material, and bonding the apertured web of nonwoven material to a film.
1. An outer cover for an absorbent article, the outer cover comprising a fibrous nonwoven component having a plurality of apertures formed therein and a breathable film bonded to the apertured nonwoven component, the apertures in the nonwoven component being formed by needling prior to the film being bonded to the nonwoven component such that the nonwoven component is bonded to the film at locations adjacent the apertures forming a plurality of domed areas extending away from the film such that a gap is formed between the nonwoven component and the film, the apertures having a minimum width adjacent to the film and a maximum width adjacent to an outer extent of the nonwoven component, the film being free of a plurality of apertures, the nonwoven component having a conductance between 70 W/m 2 ° C. and 100 W/m 2 ° C., and the gap between the nonwoven component and the film being between 200 and 400 μm.
2. The outer cover set forth in claim 1 wherein the film is adhesively bonded to the apertured nonwoven.
3. The outer cover set forth in claim 1 wherein at least some of the apertures of the plurality of apertures have a minimum width between 0.5 mm and 4.0 mm.
4. The outer cover set forth in claim 1 wherein each of the apertures of the plurality of apertures is spaced from adjacent apertures by a distance between 0.5 mm and 6 mm.
5. The outer cover set forth in claim 1 wherein the plurality of apertures define an aperture density between 9 per square centimeter and 36 per square centimeter.
6. The outer cover set forth in claim 5 wherein the plurality of apertures define an aperture density of approximately 18 apertures per square centimeter.
7. The outer cover set forth in claim 1 wherein the ratio of the maximum width to the minimum width is 1.5.
8. The outer cover set forth in claim 1 wherein at least some of the apertures of the plurality of apertures are readily visible to the user.
9. An absorbent article comprising the outer cover set forth in claim 1 .
10. An outer cover for an absorbent article, the outer cover comprising a fibrous nonwoven component having a plurality of apertures formed therein and a breathable film bonded to the apertured nonwoven component, the apertures in the nonwoven component being formed such that the nonwoven component is bonded to the film at locations adjacent the apertures forming a plurality of domed areas extending away from the film such that a gap is formed between the nonwoven component and the film, the apertures having a minimum width adjacent to the film and a maximum width adjacent to an outer extent of the nonwoven component, the nonwoven component having a conductance between 70 W/m 2 ° C. and 100 W/m 2 ° C., and the gap between the nonwoven component and the film being between 200 and 400 μm, and the outer cover having a breathability between 1,500 grams/m 2 -24 hours and 10,000 grams/m 2 -24 hours as determined by the WVTR test procedure.
11. The outer cover set forth in claim 10 wherein the outer cover has a breathability between 2,500 grams/m 2 -24 hours and 7,000 grams/m 2 -24 hours as determined by the WVTR test procedure.
12. The outer cover set forth in claim 11 wherein the outer cover has a breathability between 3,500 grams/m 2 -24 hours and 5,000 grams/m 2 -24 hours as determined by the WVTR test procedure.
13. The outer cover set forth in claim 12 wherein the outer cover has a breathability of 4,000 grams/m 2 -24 hours as determined by the WVTR test procedure.
14. An outer cover for an absorbent article, the outer cover comprising a fibrous nonwoven component having a plurality of apertures formed therein and a breathable film bonded to the apertured nonwoven component, the apertures in the nonwoven component being formed such that the nonwoven component is bonded to the film at locations adjacent the apertures forming a plurality of domed areas extending away from the film such that a gap is formed between the nonwoven component and the film, the apertures having a minimum width adjacent to the film and a maximum width adjacent to an outer extent of the nonwoven component, the nonwoven component having a conductance between 70 W/m 2 ° C. and 100 W/m 2 ° C., and the gap between the nonwoven component and the film being between 200 and 400 μm, and the outer cover having a peel strength between the nonwoven component and the film between 25 gf and 35 gf.
15. The outer cover set forth in claim 14 wherein the nonwoven component has an EMC value between 60 and 90.
16. The outer cover set forth in claim 15 wherein the nonwoven component has an EMC value between 70 and 80.