Transfer layer for absorbent article
View Patent ↗A film particularly suited for use as a transfer layer in an absorbent article has a plurality of capillaries and a plurality of drains, said capillaries comprising side walls depending from a female side of the film and terminating in an aperture on a male side of the film; said drains comprising side walls that depending from the female side of the film and terminating in an aperture on the male side of the film, wherein the drains are disposed at an obtuse angle relative to a base plane of the film.
1. A formed film having a female side and a male side, the formed film comprising:
a plurality of capillaries extending from the female side of the formed film and terminating in one or more first apertures on the male side of the formed film,
wherein each of the plurality of capillaries comprise first and second sidewalls in cross-section, and
wherein the first and second sidewalls are arranged such that each of the plurality of capillaries define a capillary axis that is disposed at a first angle relative to a base plane of the formed film; and
a plurality of drains extending from the female side of the formed film and terminating in one or more second apertures on the male side of the formed film,
wherein each of the plurality of drains comprise third and fourth sidewalls in cross-section,
wherein the third and fourth sidewalls are arranged such that each of the plurality of drains define a drain axis that is slanted at a second angle relative to the base plane of the formed film, and
wherein the second angle differs from the first angle.
2. The formed film of claim 1 , wherein the second angle is obtuse relative to the base plane of the formed film.
3. The formed film of claim 2 , wherein the second angle is about 100-175° relative to the base plane of the formed film.
4. The formed film of claim 1 , wherein the plurality of drains have an average cross sectional area greater than 0.2 mm 2 and an average hydraulic diameter between 0.55 mm and 1.2 mm.
5. The formed film of claim 1 , wherein the plurality of capillaries have an average diameter between 50 microns and 400 microns as measured on the female side of the film.
6. The formed film of claim 1 , wherein the ratio of the hydraulic radius of the plurality of drains to the plurality of capillaries is greater than 3:1.
7. The formed film of claim 1 , wherein the plurality of capillaries and the plurality of drains are generally conical.
8. A formed film having a female side and a male side, the formed film comprising:
a plurality of capillaries extending from the female side of the formed film and terminating in one or more first apertures on the male side of the formed film,
wherein the plurality of capillaries comprise first and second sidewalls in cross-section, and
wherein the first and second side walls are arranged such that each of the plurality of capillaries are disposed at a first angle relative to a base plane of the formed film; and
a plurality of drains extending from the female side of the formed film and terminating in one or more second apertures on the male side of the formed film,
wherein the plurality of drains comprise third and fourth sidewalls in cross-section,
wherein the third and fourth sidewalls are arranged such that each of the plurality of drains are slanted at a second angle relative to the base plane of the formed film, and
wherein the third and fourth sidewalls are generally parallel to each other in cross-section and not parallel to the first and second sidewalls in the cross-section.
9. The formed film of claim 8 , wherein the plurality of drains have an average cross sectional area greater than 0.2 mm 2 and an average hydraulic diameter between 0.55 mm and 1.2 mm.
10. The formed film of claim 8 , wherein the plurality of capillaries have an average diameter between 50 microns and 400 microns as measured on the female side of the film.
11. The formed film of claim 8 , wherein the ratio of the hydraulic radius of the plurality of drains to the plurality of capillaries is greater than 3:1.
12. The formed film of claim 8 , wherein the first angle differs from the second angle.
13. The formed film of claim 12 , wherein the second angle is obtuse relative to the base plane of the formed film.
14. The formed film of claim 13 , wherein the second angle is about 100-175° relative to the base plane of the formed film.
15. The formed film of claim 8 , wherein the plurality of capillaries and the plurality of drains are generally conical.
16. A formed film having a female side and a male side, the formed film comprising:
a plurality of capillaries extending from the female side of the formed film and terminating in one or more first apertures on the male side of the formed film,
wherein each of the plurality of capillaries comprise first and second sidewalls in cross-section, and
wherein the first and second side walls are arranged such that each of the plurality of capillaries define a capillary axis that is disposed at a first angle relative to a base plane of the formed film; and
a plurality of drains extending from the female side of the formed film and terminating in one or more second apertures on the male side of the formed film,
wherein each of the plurality of drains comprise third and fourth sidewalls in cross-section,
wherein the third and fourth sidewalls are arranged such that each of the plurality of drains define a drain axis that is slanted at a second angle relative to a base plane of the formed film,
wherein the second angle differs from the first angle, and
wherein at least one of the third sidewall or the fourth sidewall of a first drain is generally parallel to at least one of the third sidewall or the fourth sidewall of an adjacent, second drain and not parallel to the either of the first or second sidewalls of the plurality of capillaries.
17. The formed film of claim 16 , wherein the second angle is obtuse relative to the base plane of the formed film.
18. The formed film of claim 17 , wherein the second angle is about 100-175° relative to the base plane of the formed film.
19. The formed film of claim 16 , wherein the plurality of drains have an average cross sectional area greater than 0.2 mm 2 and an average hydraulic diameter between 0.55 mm and 1.2 mm.
20. The formed film of claim 16 , wherein the plurality of capillaries have an average diameter between 50 microns and 400 microns as measured on the female side of the film.
21. The formed film of claim 16 , wherein the ratio of the hydraulic radius of the plurality of drains to the plurality of capillaries is greater than 3:1.
22. The formed film of claim 16 , wherein the plurality of capillaries and the plurality of drains are generally conical.