Absorbent article having a window with a body-conforming acquisition element positioned therein

• US 5,662,633 A
• Filed: 05/17/1995
• Issued: 09/02/1997
• Est. Priority Date: 07/23/1991
• Status: Expired due to Fees

• Current Assignee: Clemson University
• Original Assignee: The Procter & Gamble Company
• Inventors: Johnson, Theresa Louise, Thompson, Hugh Ansley, Doak, Nancy Beck, Olsen, Robb Eric
• Primary Examiner(s): ZUTTARELLI, ANTHONY
• Application Number:
  US08/444,079
• Time in Patent Office: 839 Days
• Field of Search: 604/358, 604/368, 604/369, 604/372, 604/378-380, 604/385.1
• US Class Current: 604/378
• CPC Class Codes: A61F 13/47218 with a raised crotch region, e.g. hump
• CPC Class Codes: A61F 13/47227 for interlabial use
• CPC Class Codes: A61F 13/53717 the layer having a promotional function on liquid propagation in the horizontal direction
• CPC Class Codes: A61F 13/53743 characterised by the position of the layer relative to the other layers
• CPC Class Codes: A61F 2013/530175 with capillary channel
• CPC Class Codes: A61F 2013/53765 characterized by its geometry
• CPC Class Codes: A61F 2013/53791 being resilient or elastic

Abstract

An absorbent article, such as a sanitary napkin is provided. The sanitary napkin of the present invention has at least one component facing the body surface of the sanitary napkin having a window cut out therein. The sanitary napkin is provided with an acquisition/distribution component such as a tow of resilient fibers having intra-fiber capillary channels. The tow of resilient fibers is positioned so that it at least partially lies in the space defined by the window. The acquisition/distribution component has a compressed configuration and an uncompressed configuration. In its uncompressed configuration, the acquisition/distribution component lies relatively flat behind the window. In its compressed configuration, the acquisition/distribution component forms a hump on the body surface that protrudes from the window.

Claims

1. An absorbent article for wearing in a crotch region of a wearer'"'"'s undergarment, said absorbent article having a body surface, a garment surface, a longitudinal centerline, and a transverse centerline, said absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to said topsheet;

an absorbent core positioned between said topsheet and said backsheet, said absorbent core comprising a first layer and a second layer wherein said second layer underlies said first layer; and

an acquisition component positioned such that at least a portion of said acquisition component is disposed above at least a portion of said absorbent core and at least a portion of said acquisition component is disposed between said first layer and said second layer of said absorbent core, said acquisition component being in liquid communication with said absorbent core and comprising a mass of wet and dry resilient material, said acquisition component having a compressed configuration when it is subjected to inward compressive forces in the direction of and along said transverse centerline and an uncompressed configuration when said compressive forces are absent, wherein when said acquisition component is in its uncompressed configuration, the body surface of said absorbent article overlying said acquisition component forms a continuous curve having a curvature, and when said acquisition component is in its compressed configuration, said acquisition component forms a hump on said body surface.

2. The absorbent article of claim 1 wherein said hump has a height of at least about 3 mm.

3. The absorbent article of claim 2 wherein said hump has a height of less than or equal to about 15 mm.

4. The absorbent article of claim 2 herein said hump has a length of between about 4 cm to about 10 cm.

5. The absorbent article of claim 4 wherein said hump has a base with a width of between about 1 cm and about 5 cm.

6. The absorbent article of claim 1 wherein said hump is sized to at least partially fit in the space between the wearer'"'"'s labia majora.

7. The absorbent article of claim 1 wherein said hump is wedge-shaped.

8. The absorbent article of claim 1 wherein said hump is cusp-shaped.

9. The absorbent article of claim 8 wherein said hump has a pair of curved sides each having a first radius of curvature, and an upper portion comprising a point of maximum amplitude of said hump, and said upper portion of said hump has a second radius of curvature that is less than said first radius of curvature.

10. The absorbent article of claim 1 wherein said acquisition component is self-draining.

11. The absorbent article of claim 1 wherein said acquisition component comprises a fibrous component.

12. The absorbent article of claim 11 wherein the longitudinal centerline extends in a longitudinal direction, and said acquisition component is comprised of fibers that preferentially distribute liquids in the longitudinal direction.

13. An absorbent article for wearing in a crotch region of a wearer'"'"'s undergarment, said absorbent article having a body surface, a garment surface, and a transverse centerline, said absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to said topsheet;

an absorbent core positioned between said topsheet and backsheet, said absorbent core comprising a first layer and a second layer wherein said second layer underlies said first layer; and

an acquisition component positioned such that at least a portion of said acquisition component is disposed above at least a portion of said absorbent core and at least a portion of said acquisition component is disposed between said first layer and said second layer of said absorbent core, said acquisition component comprising a wet and dry resilient material, said acquisition component having a compressed configuration when it is subjected to inward compressive forces along said transverse centerline and an uncompressed configuration when such forces are absent, wherein when said acquisition component is in its compressed configuration, said acquisition component forms a hump on the body surface;

wherein

said absorbent core has a window cut out therein and at least a portion of said acquisition component is positioned within said window.

14. The absorbent article of claim 13 wherein said topsheet has a window cut out therein.

15. The absorbent article of claim 14 wherein the window cut out in said topsheet is the same size as the window cut out in said absorbent core.

16. The absorbent article of claim 14 wherein the window cut out in said topsheet is smaller than the window cut out in said absorbent core.

17. The absorbent article of claim 14 wherein the window cut out in said topsheet is larger than the window cut out in said absorbent core.

18. The absorbent article of claim 13 wherein only said absorbent core has a window cut out therein.

19. The absorbent article of claims 13 or 18 further comprising a wicking layer positioned between said absorbent core and said backsheet.

20. The absorbent article of claim 19 wherein said wicking layer is positioned between said topsheet and said absorbent core.

21. An absorbent article for wearing in a crotch region of a wearer'"'"'s undergarment, said absorbent article having a body surface, a garment surface, a longitudinal centerline, a transverse centerline, two longitudinal side edges, and two transverse end edges, said absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to said topsheet;

an absorbent core positioned between said topsheet and backsheet, said absorbent core having a first layer facing said topsheet, a second layer facing said backsheet wherein said first layer has a window cut out therein;

an acquisition/distribution component, at least a part of said acquisition/distribution component being positioned within said window and at least a portion of said acquisition/distribution component being positioned between said first layer and said second layer, said acquisition/distribution component having a compressed configuration wherein said acquisition/distribution component forms a hump on the body surface that protrudes from said window when said acquisition/distribution component is subjected to inward compressive forces along said transverse centerline and uncompressed configuration when such forces are absent wherein said acquisition/distribution component lies relatively fiat; and

a fastener on the garment surface of said absorbent article for fastening said absorbent article to said undergarment.

22. The absorbent article of claim 21 wherein said window is centered along said longitudinal centerline.

23. The absorbent article of claim 22 having a length, a width, a first end region, a second end region, and a central region disposed between said end regions, wherein said end regions each extend from each transverse end edge about 1/8 to 1/3 of the length of the absorbent article toward said transverse centerline and said window is in said central region.

24. The absorbent article of claim 23 wherein the window in said upper portion of said absorbent core has a length and a width, and the length of said window is between about 4 cm and about 10 cm, and the width of said window is between about 1 cm and about 5 cm.

25. The absorbent article of claim 24 wherein the length of said window is about 5 cm and the width of said window is about 2.5 cm.

26. The absorbent article of claim 21 wherein said absorbent core comprises at least one layer of absorbent gelling material and said upper and lower portions of said core each comprise a layer of cross-linked cellulose fibers.

27. The absorbent article of claim 21 wherein said acquisition/distribution component comprises a resilient material.

28. The absorbent article of claim 27 wherein said acquisition/distribution component comprises capillary channel fibers having intra-fiber capillary channels.

29. The absorbent article of claims 21 or 28 wherein said acquisition/distribution component comprises a batt of fibers.

30. The absorbent article of claim 28 wherein said capillary channel fibers are in the form of a staple sliver.

31. The absorbent article of claim 28 wherein said capillary channel fibers are in the form of tow.

32. The absorbent article of claim 21 wherein said acquisition/distribution component comprises a nonwoven web.

33. An absorbent article for wearing in a crotch region of a wearer'"'"'s undergarment, said absorbent article having a body surface, a garment surface, a longitudinal centerline, and a transverse centerline, said absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to said top sheet;

an absorbent core positioned between said topsheet and said backsheet, said absorbent core comprising a first layer and a second layer wherein said second layer underlies said first layer, and said first layer of said absorbent core having a window cut out therein; and

a resilient acquisition component positioned within said window such that at least a portion of said acquisition component is dispose between said first layer and said second layer of said absorbent core, said acquisition component comprising capillary channel fibers having intra-fiber capillary channels, said acquisition component being in liquid communication with said absorbent core.