Three-dimensional apertured film for transmitting dynamically-deposited and statically-retained fluids
View Patent ↗A three-dimensional film for use as a transfer layer in an absorbent article has a continuous surface and a discontinuous surface disposed generally parallel to and spaced from said continuous surface; both the continuous surface and the discontinuous surface have large scale apertures defined by sidewalls originating on the surface and extending outwardly therefrom and sized to permit acquisition of fluids by gravity, and optionally each surface also includes small scale apertures sized to acquire fluids by capillary action.
1. A film, comprising:
a first continuous surface;
a discontinuous surface disposed generally parallel to and spaced from the first continuous surface;
a plurality of first drains formed in the first continuous surface, each of the plurality of first drains being defined by a first sidewall extending downwardly from the first continuous surface and terminating in a first aperture at a distal end of the first sidewall;
a plurality of protrusions extending upwardly from the first continuous surface, each of the plurality of protrusions forming one of a plurality of second continuous surfaces disposed generally parallel to and spaced from the first continuous surface, the plurality of second continuous surfaces collectively forming the discontinuous surface; and
at least one second drain formed in each of the plurality of second continuous surfaces, each of the second drains being defined by a second sidewall extending downwardly from a respective one of the plurality of second continuous surfaces and terminating in a second aperture at a distal end of the second sidewall.
2. The film of claim 1 , wherein the plurality of first drains and the at least one second drain are sized to allow insult fluids to be acquired through the film by gravity.
3. The film of claim 2 , wherein the plurality of first drains and the at least one second drain have a diameter from 400 microns to 1000 microns.
4. The film of claim 1 , further comprising small scale apertures in at least one of the first continuous surface and the discontinuous surface.
5. The film of claim 4 , wherein the small scale apertures are sized to allow fluids to be acquired through the film by capillary action.
6. The film of claim 4 , wherein the small scale apertures have a diameter less than 375 microns.
7. The film of claim 4 , wherein the small scale apertures have a diameter at least 4 times smaller than a diameter of the plurality of first drains and the at least one second drain.
8. The film of claim 1 , wherein the plurality of second continuous surfaces are in a common plane.
9. The film of claim 1 , wherein the plurality of protrusions extend from 100 to 250 microns above the first continuous surface.
10. An absorbent article comprising a nonwoven fibrous topsheet having an upper and lower surface; an absorbent core; and a film between the topsheet and the absorbent core; the film comprising:
a first continuous surface;
a discontinuous surface disposed generally parallel to and spaced from the first continuous surface;
a plurality of first drains formed in the first continuous surface, each of the plurality first drains being defined by a first sidewall extending downwardly from the first continuous surface and terminating in a first aperture at a distal end of the first sidewall;
a plurality of protrusions extending upwardly from the first continuous surface, each of the protrusions forming one of a plurality of second continuous surfaces disposed generally parallel to and spaced from the first continuous surface, the plurality of second continuous surfaces collectively forming the discontinuous surface; and
at least one second drain formed in each of the plurality of second continuous surfaces, each of the second drains being defined by a second sidewall extending downwardly from a respective one of the plurality of second continuous surfaces and terminating in a second aperture at a distal end of the second sidewall.
11. The absorbent article of claim 10 , further comprising small scale apertures in at least one of the first continuous and the plurality of second continuous surfaces.
12. The absorbent article of claim 11 , wherein the small scale apertures have a diameter at least 4 times smaller than a diameter of the plurality of first drains and the at least one second drain.
13. The absorbent article of claim 10 , wherein the plurality of first drains and the at least one second drain have a diameter from 400 microns to 1000 microns.
14. The absorbent article of claim 9 , wherein the plurality of second continuous surfaces are in contact with the topsheet.