Three-dimensional apertured film for transmitting dynamically-deposited and statically retained fluids
A three-dimensional film for use as an acquisition distribution layer in an absorbent article comprising a first surface with drains extending downward from the first surface, the drains being capable of transmitting fluid by gravity; and protrusions extending upward from the first surface to an upper surface with at least one capillary extending downward from the upper surface, the capillaries being capable of transmitting fluid in contact with the upper surface by capillary action. The drains rapidly transmit fluid through the film, particularly fluid that is dynamically-deposited. The capillaries transmit statically-retained fluid that is in contact with the upper surface of the protrusions.
1. A three-dimensional film comprising:
a first surface with three-dimensional hollow tubular drains extending downward from said first surface and capable of transmitting fluid by gravity; said first surface forming a continuous planar surface wherein any point on said first surface can be accessed from any other point on said first surface without leaving the continuous plane; and
a plurality of three-dimensional protrusions originating on said first surface and extending upward from said first surface, each protrusion terminating in an upper surface comprising generally planar land areas, said land areas being generally parallel to and spaced from said first surface, said upper surfaces or said protrusions forming a discontinuous planar surface wherein access to any point on one upper surface of any one protrusion from a point on any other upper surface of any other protrusion cannot be accessed without leaving said discontinuous plane; the land areas on each protrusion having at least two three-dimensional capillary structures comprising hollow tubular structures extending downward from said upper surface toward said first surface, capillary structures being capable of transmitting fluid in contact with said upper surface by capillary action.
2. The three-dimensional film of claim 1 , wherein at least a portion of said upper surface of said protrusions are approximately in a common plane.
3. The three-dimensional film of claim 1 , wherein said upper surface is spaced from about 100 to about 250 microns above said first surface.
4. The three-dimensional film of claim 1 , wherein said capillary structures have a diameter less than about 375 microns.
5. The three-dimensional film of claim 1 , wherein said drains have a diameter from about 500 microns to about 1000 microns.
6. The three-dimensional film of claim 5 , wherein said capillary structures have a diameter at least 4 times smaller than said diameter of said drains.
7. The three-dimensional film of claim 1 , further comprising: basins extending downward from said first surface having an upper opening and a bottom forming a second surface, said basins being capable of holding fluid, said second surface having at least one channel extending downward from said second surface and being capable of transmitting fluid by at least one of gravity or capillary action.
8. An absorbent article comprising:
a nonwoven topsheet having an upper and lower surface;
an absorbent core; and
three-dimensional film between said topsheet and said absorbent core comprising a first surface, with three-dimensional hollow tubular drains extending downward from said first surface and being capable of transmitting fluid by gravity; said first surface forming a continuous planar surface wherein any point on said first surface can be accessed from any other point on said first surface without leaving the continuous plane; and a plurality of three-dimensional protrusions originating on said first surface and extending upward from said first surface, each protrusion terminating in an upper surface comprising generally planar land areas, said land areas being generally parallel to and spaced from said first surface, said upper surfaces or said protrusions forming a discontinuous planar surface wherein access to any point on one upper surface of any one protrusion from a point on any other upper surface of any other protrusion cannot be accessed without leaving said discontinuous plane; the land areas on each protrusion having at least two three-dimensional capillary structures comprising hollow tubular structures extending downward from said upper surface toward said first surface, capillary structures being capable of transmitting fluid in contact with said upper surface by capillary action.
9. The absorbent article of claim 8 , wherein said capillaries have a diameter less than about 375 microns.
10. The absorbent article of claim 8 , wherein said drains have a diameter from about 500 microns to about 1000 microns.
11. The absorbent article of claim 10 , wherein said capillaries have a diameter at least 4 times smaller than said diameter of said drains.
12. The absorbent article of claim 8 wherein each protrusion contains 2-10 capillaries.
13. The absorbent article of claim 12 , wherein said upper surface of said protrusions is in contact with said lower surface of said topsheet.
14. The absorbent article of claim 12 , wherein said protrusions extend into said topsheet.
15. The absorbent article of claim 12 , wherein at least a portion of said upper surface of said protrusions are approximately in a common plane, and said common plane is above said lower surface of said topsheet.
16. The absorbent article of claim 12 , wherein said upper surface is from about 100 to about 250 microns above said first surface.
17. The absorbent article of claim 8 , wherein said three-dimensional film further comprises basins extending downward from said first surface and having an upper opening and a bottom forming a second surface, said basins being capable of holding fluid, said second surface having at least one channel extending downward from said second surface and being capable of transmitting fluid by at least one of gravity or capillary action.