Extensible absorbent article including an extensible absorbent pad layer

• US 6,129,720 A
• Filed: 12/31/1997
• Issued: 10/10/2000
• Est. Priority Date: 12/31/1997
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Sexton, Hugh Michael, Blenke, Timothy James, Tanzer, Richard Warren, Pozniak, Jennifer Elizabeth
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): PEPPERS III, MILEY CRAIG
• Application Number:
  US09/002,077
• Time in Patent Office: 1,014 Days
• Field of Search: 604/368, 604/385.2, 604/369, 604/373, 604/367, 604/378, 604/385.16, 604/358, 604/385.27, 604/385.24, 604/385.01, 604/385.22
• US Class Current: 604/385.16
• CPC Class Codes: A61F 13/51478 being a laminate, e.g. multi-layered or with several layers
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers

Abstract

An absorbent article includes an absorbent pad and an outer cover. An extensible layer replaces at least one of the tissue layers of the absorbent pad. The extensible layer can be secured to an extensible bodyside liner or an extensible outer cover. The extensible layer is adhesively secured to the inner surface of the outer cover or the bodyside liner. In embodiments where the outer cover is extensible in a cross-direction and/or a longitudinal direction, the extensible layer is extensible in the same directions and moves with the outer cover. Absorbent core is not physically secured to the extensible layer. Thus the extensible layer has free mobility with respect to the absorbent core when the outer cover is extended, without deleterious effect on the absorbent core, or the absorbent pad as a whole. Therefore, tearing of the absorbent pad and damage to, or release, of superabsorbent material from the absorbent pad is prevented. In some embodiments, the adhesive securing elements can comprise an elastic adhesive material.

Claims

1. An absorbent article including a rear portion, a front portion, and a crotch portion connecting said rear portion and said front portion, said absorbent article having a cross direction extending across said absorbent article and a longitudinal direction extending through the front, crotch, and rear portions, said absorbent article comprising:

(a) an absorbent core having a first side and a second side and an outer perimeter;

(b) an extensible layer of material having a first surface and an opposing second surface, the first surface of said extensible layer being disposed adjacent the first side of said absorbent core;

(c) an extensible outer cover having a third outer cover surface and a fourth opposing outer cover surface, the second surface of said extensible layer being disposed in surface-to-surface relationship with the third outer cover surface; and

(d) a pattern of adhesive disposed between said extensible layer and said outer cover, the pattern of adhesive mounting said extensible layer to said outer cover such that extension of said outer cover extends said extensible layer, said extensible layer having the ability to extend in response to extension of said outer cover while at least a portion of the absorbent core is free to move within the absorbent article, with respect to the outer cover without significant loading of said absorbent core.

2. An absorbent article as in claim 1 wherein said extensible layer comprises a layer of extensible spunbond material.

3. An absorbent article as in claim 1, said outer cover comprising a neck bonded laminate.

4. An absorbent article as in claim 1, said absorbent article including first and second containment flaps.

5. An absorbent article as in claim 1, said absorbent article being devoid of separate waist elastic elements, and being resiliently stretchable in the waist.

6. An absorbent article as in claim 1, said absorbent article including leg elastics disposed at least in the crotch portion of said absorbent article, said leg elastics providing extensibility and retraction in the longitudinal direction.

7. An absorbent article as in claim 1, said pattern of adhesive comprising a plurality of swirl patterns.

8. An absorbent article as in claim 1, including a second layer of material having a fifth surface and an opposing sixth surface, the fifth surface of said second layer being disposed adjacent the second side of said absorbent core, said extensible layer and said second layer containing said absorbent core, and wherein said absorbent core, said extensible layer, and said second layer, in combination, comprise an absorbent pad.

9. An absorbent article as in claim 8, said extensible layer and said second layer being secured to each other about at least a portion of an outer perimeter of said absorbent core.

10. An absorbent article as in claim 8, including a bodyside liner having a seventh surface and an opposing eighth surface, the seventh surface of said bodyside liner being disposed in surface-to-surface relationship with the sixth surface of said second layer.

11. An absorbent article as in claim 8 including a bodyside liner on an opposite side of said absorbent core from said outer cover, and wherein at least one of said bodyside liner and said outer cover comprise a resiliently extensible material.

12. An absorbent article as in claim 8 including a bodyside liner on an opposite side of said absorbent core from said outer cover, and said bodyside liner and said outer cover both being resiliently extensible, and having substantially equal resilient extensibility in each direction.

13. An absorbent article as in claim 8 including a bodyside liner on an opposite side of said absorbent core from said outer cover, and said bodyside liner and said outer cover both being extensible in at least the cross-direction.

14. An absorbent article as in claim 8 including a bodyside liner on an opposite side of said absorbent core from said outer cover, and said absorbent core, said extensible layer, and a tissue, in combination, comprising an absorbent pad, said absorbent pad having an outer perimeter, said pattern of adhesive being disposed on the third surface of said outer cover outwardly of said absorbent pad such that said outwardly disposed adhesive secures said outer cover to said bodyside liner at locations disposed outwardly of the outer perimeter of said absorbent pad.

15. An absorbent article including a rear portion, a front portion, and a crotch portion connecting said rear portion and said front portion, said absorbent article having a cross direction extending across said absorbent article and a longitudinal direction extending through the front, crotch, and rear portions, said absorbent article comprising:

(a) an extensible outer cover having a first inner surface and an opposing second outer surface;

(b) a bodyside liner having a third body contacting surface and an opposing fourth surface, the fourth surface of said bodyside liner being mounted in surface-to-surface relationship to at least a portion of the first inner surface of said outer cover;

(c) an absorbent pad disposed between said bodyside liner and said outer cover, said absorbent pad comprising an absorbent core having a first side and an opposing second side, said absorbent pad including a first extensible layer of material disposed between the first side of said absorbent core and said outer cover, said first extensible layer having a first surface and an opposing second surface, a portion less than the entirety of the first surface of said first extensible layer being secured to the first inner surface of said outer cover such that said extensible layer and said outer cover layer can expand with differential stretching without damaging said extensible layer, and a second layer of material disposed between the second surface of said absorbent core and said bodyside liner; and

(d) adhesive material disposed between said outer cover and said first extensible layer and mounting said outer cover and said first extensible layer to each other, such that extension of said outer cover extends said extensible layer within said absorbent article without significant loading of said absorbent core.

16. An absorbent article as in claim 15 wherein said outer cover comprises a resiliently extensible material.

17. An absorbent article as in claim 15 wherein said outer cover comprises a neck bonded laminate.

18. An absorbent article as in claim 15 wherein said bodyside liner comprises an extensible material.

19. An absorbent article as in claim 18 wherein said bodyside liner, said outer cover, and said first extensible layer are extensible in at least the cross-direction, said first extensible layer enabling said outer cover to extend at least about 30 percent in the cross-direction without damaging said absorbent pad.

20. An absorbent article as in claim 18 wherein said first extensible layer enables said outer cover to extend at least about 200 percent in the cross-direction without damaging said absorbent pad.

21. An absorbent article as in claim 20 wherein said first extensible layer enables said outer cover to extend at least about 30 percent in the longitudinal direction without damaging said absorbent pad.

22. An absorbent article as in claim 15 wherein the adhesive material disposed between said outer cover and said first extensible layer comprises elastic adhesive material.

23. An absorbent article as in claim 15, said second layer comprising a tissue.

24. An absorbent article as in claim 23, said tissue and said first extensible layer being secured to each other about said absorbent core, such that said absorbent core is enclosed by the combination of said tissue and said first extensible layer, in combination with said absorbent core, to thereby comprise said absorbent pad.

25. An absorbent article as in claim 15, said absorbent pad having an outer perimeter, said adhesive material extending outwardly beyond the outer perimeter such that said adhesive material secures said outer cover to said bodyside liner.

27. An absorbent article as in claim 15, said second layer comprising an extensible material.

28. An absorbent article as in claim 27, said second layer being an extensible layer, said first extensible layer and said second extensible layer being secured to each other about said absorbent core, such that said absorbent core is enclosed by the combination of said first extensible layer and said second extensible layer to thereby form said absorbent pad.

29. An absorbent article as in claim 27, said second layer being an extensible layer, said extensible layer and said second extensible layer having substantially equal extensibility in at least the cross-direction.

30. An absorbent article as in claim 15, said outer cover having a greater or equal stress/strain ratio than said extensible layer.

26. An absorbent article as in clam 15, said second layer comprising a spunbond material.

31. An absorbent article including a rear portion, a front portion, and a crotch portion connecting said rear portion and said front portion, said absorbent article having a cross direction extending across said absorbent article and a longitudinal direction extending through the front, crotch, and rear portions, said absorbent article comprising:

(a) an absorbent core having a first side and a second side;

(b) a layer of material having a first surface and an opposing second surface, the first surface of said layer being disposed adjacent the first side of said absorbent core;

(c) an extensible outer cover having a third outer cover surface and a fourth opposing outer cover surface, the second surface of said layer being disposed in surface-to-surface relationship with the third outer cover surface; and

(d) elastic adhesive disposed between said layer and said outer cover, said elastic adhesive mounting said layer to said outer cover such that extension of said outer cover can extend said adhesive without significant loading of said absorbent core.

32. An absorbent article as in claim 31, said layer comprising an extensible layer.