Absorbent article with bolstering waist feature

• US 5,649,920 A
• Filed: 08/30/1996
• Issued: 07/22/1997
• Est. Priority Date: 08/12/1991
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Hasse, Margaret Henderson, Young, Gerald Alfred, Lavon, Gary Dean, Seitz, Bret Darren
• Primary Examiner(s): Willse, David H.
• Assistant Examiner(s): O YONG, KI
• Application Number:
  US08/708,022
• Time in Patent Office: 326 Days
• Field of Search: 604/358, 604/368, 604/378, 604/385.1, 604/385.2, 604/369
• US Class Current: 604/385.3
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/49012 the elastic means being elastic panels
• CPC Class Codes: A61F 13/49466 the edge leakage prevention means being at the waist region
• CPC Class Codes: A61F 13/53 characterised by the absorbing medium A61F13/20 takes precedence
• CPC Class Codes: A61F 13/532 inhomogeneous in the plane of the pad
• CPC Class Codes: A61F 13/535 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes A61F13/5323, A61F13/537 take precedence
• CPC Class Codes: A61F 13/53717 the layer having a promotional function on liquid propagation in the horizontal direction
• CPC Class Codes: A61F 13/5633 open type diaper
• CPC Class Codes: A61F 13/565 pants type diaper
• CPC Class Codes: A61F 2013/1539 being expandable
• CPC Class Codes: A61L 15/425 Porous materials, e.g. foams or sponges

Abstract

Absorbent articles are provided having a bolstering waist feature. In its preferred embodiment, the bolstering waist feature expands upon exposure to aqueous body liquids effectively tightening the diaper by stretching of the waist regions of the absorbent article. There is a resulting increase in the contractive forces in the band of lateral tension in the waist regions of the absorbent article with a corresponding reduction in the risk of waist leakage. The bolstering waist feature further provides a member resisting longitudinal bending in the waist regions of the absorbent article, particularly adjacent to a wearer'"'"'s belly. This member can also act as a "strut" resisting the forces, such as those due to gravity, which tend to cause an absorbent article to slide downward. The absorbent article is additionally provided with an absorbent core comprising at least a redistribution component that is preferably capable of redistributing aqueous body liquids from the crotch region to the waist regions of the absorbent article. The redistribution component is in effective fluid communication with the bolstering waist feature.

Claims

1. An absorbent article for fitting about a wearer'"'"'s body, the absorbent article having longitudinal and lateral centerlines, which respectively define a longitudinal and a lateral direction, longitudinal edges, longitudinally opposed first and second waist regions, and a crotch region therebetween, the absorbent article comprising:

an outer cover;

an absorbent core joined to said outer cover, said absorbent core comprising at least a redistribution component which is capable of transporting aqueous body liquids from said crotch region to at least one of said waist regions;

means for creating lateral tension through at least a portion of said waist regions disposed in said waist regions; and

a bolstering waist feature positioned in at least one of said waist regions, said bolstering waist feature being in effective fluid communication with said absorbent core, said bolstering waist feature having a caliper growth ratio of at least 3.0;

1 such that said bolstering waist feature is at least able to counteract a portion of the loss of fit due to reduced lateral tension in said waist regions on wearing the absorbent article.

2. An absorbent article according to claim 1 wherein said outer cover comprises a liquid impervious backsheet and a liquid pervious topsheet joined with said backsheet;

said absorbent core being positioned between said topsheet and said backsheet.

3. An absorbent article according to claim 2 wherein said bolstering waist feature has a caliper growth ratio of at least 5.0:

1.

4. An absorbent article according to claim 2 wherein said bolstering waist feature has a caliper growth ratio of at least 7.0:

1.

5. An absorbent article according to claim 2 wherein said bolstering waist feature is an extension of said redistribution component and comprises an absorbent polymeric foam.

6. An absorbent article according to claim 5 wherein said absorbent polymeric foam comprises a HIPE foam.

7. An absorbent article according to claim 2 wherein said bolstering waist feature is positioned in both said first and second waist regions.

8. An absorbent article for fitting about a wearer'"'"'s body, the absorbent article having longitudinal and lateral centerlines, which respectively define a longitudinal and a lateral direction, longitudinal edges, longitudinally opposed first and second waist regions, and a crotch region therebetween, the absorbent article comprising:

an outer cover;

an absorbent core joined to said outer cover, said absorbent core comprising at least a redistribution component which is capable of transporting aqueous body liquids from said crotch region to said waist regions;

means for creating lateral tension through at least a portion of said waist regions disposed in said waist regions; and

a bolstering waist feature positioned in least one of said waist regions, said bolstering waist feature being in effective fluid communication with said absorbent core, said bolstering waist feature having a cantilever bending ratio of at least 1.0;

1.

9. An absorbent article according to claim 8 wherein said outer cover comprises a liquid impervious backsheet and a liquid pervious topsheet joined with said backsheet;

said absorbent core being positioned between said topsheet and said backsheet.

10. An absorbent article according to claim 9 wherein said bolstering waist feature has a cantilever bending ratio of at least 1.1:

1.

11. An absorbent article according to claim 9 wherein said bolstering waist feature has a cantilever bending ratio of at least 1.3:

1.

12. An absorbent article for fitting about a wearer'"'"'s body, the absorbent article having longitudinal and lateral centerlines, which respectively define a longitudinal and a lateral direction, longitudinal edges, longitudinally opposed first and second waist regions, and a crotch region therebetween, the absorbent article comprising:

an outer cover;

an absorbent core joined to said outer cover, said absorbent core comprising at least a redistribution component which is capable of transporting aqueous body liquids from said crotch region to said waist regions;

means for creating lateral tension through at least a portion of said waist regions disposed in said waist regions; and

a bolstering waist feature positioned in least one of said waist regions, said bolstering waist feature being in effective fluid communication with said absorbent core, said bolstering waist feature having a stiffness retention ratio of at least 0.9;

1 when dry.

13. An absorbent article according to claim 12 wherein said outer cover comprises a liquid impervious backsheet and a liquid pervious topsheet joined with said backsheet;

said absorbent core being positioned between said topsheet and said backsheet.

14. An absorbent article according to claim 13 wherein said bolstering waist feature also has a stiffness retention ratio of at least 0.95:

1 when dry.

15. An absorbent article for fitting about a wearer'"'"'s body, the absorbent article having longitudinal and lateral centerlines, which respectively define a longitudinal and a lateral direction, longitudinally opposed first and second waist regions, and a crotch region therebetween, the absorbent article comprising:

a containment assembly having longitudinal sides and lateral ends which define the perimeter of said containment assembly, said containment assembly comprising

a liquid pervious topsheet;

a liquid impervious backsheet joined with said topsheet;

an absorbent core positioned between said topsheet and said backsheet, said absorbent core comprising at least a fluid redistribution component;

a bolstering waist feature positioned in said first waist region, said bolstering waist feature being in effective fluid communication with said absorbent core, said bolstering waist feature having a caliper growth ratio of at least 5.0;

1 and a cantilever bending ratio of at least 1.1;

1;

at least one pair of laterally extending side panels positioned at least partially in one of said waist regions, wherein each of said side panels is joined to and extends laterally outward from one of said longitudinal sides of said containment assembly;

a fastening system, disposed on said first and second waist regions, for creating lateral tension through at least a portion of said waist regions.

16. An absorbent article according to claim 15 wherein said absorbent article further comprises a waistshield positioned between said bolstering waist feature and said topsheet, pairs of longitudinally extending side panels in both of said first and second waist regions, and longitudinally extending elasticized leg cuffs connectively associated with said longitudinal sides of said containment assembly.

17. An absorbent article according to claim 16 wherein said side panels in said second waist region are elasticized, said fastening system comprises a tape fastening means, and said elasticized leg cuffs comprise dual extended cuffs.

18. An absorbent article according to claim 17 wherein said bolstering waist feature has a caliper growth ratio of at least 7.0:

1.

19. An absorbent article according to claim 16 wherein said containment assembly further comprises an elasticized waist feature extending longitudinally inward from said lateral end of said containment assembly that is in said second waist region toward said absorbent core, wherein said elasticized waist feature comprises at least a portion of said topsheet and said backsheet.

20. An absorbent article for fitting about a wearer'"'"'s body, the absorbent article having longitudinal and lateral centerlines, which respectively define a longitudinal and a lateral direction, longitudinal sides and lateral ends, which define the periphery of the absorbent article, longitudinally opposed first and second waist regions, and a crotch region therebetween, the absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined with said topsheet;

an absorbent core positioned between said topsheet and said backsheet, said absorbent core comprising at least a fluid redistribution component;

a fastening system, disposed on said first and second waist regions, for creating lateral tension through at least a portion of said waist regions; and

a bolstering waist feature positioned in at least one of said waist regions, said bolstering waist feature being in effective fluid communication with said absorbent core, said bolstering waist feature having a caliper growth ratio of at least 5.0;

1 and a cantilever bending ratio of at least 1.1;

1.

21. An absorbent article according to claim 20 wherein said bolstering waist feature is an extension of said fluid redistribution component and comprises a HIPE foam.

22. An absorbent article according to claim 20 wherein said absorbent article further comprises laterally extending side panels in said first and second waist regions, a waistshield positioned between said bolstering waist feature and said topsheet, and longitudinally extending elasticized leg cuffs connectively associated with said longitudinal sides of said absorbent article in at least said crotch region.

23. An absorbent article according to claim 22 wherein said side panels in said second waist region are elasticized.

24. An absorbent article according to claim 22 wherein said fastening system comprises a tape fastening means.

25. An absorbent article according to claim 22 wherein said fastening system comprises a mechanical fastening means.

26. An absorbent article according to claim 22 wherein said elasticized leg cuffs comprise dual extended cuffs.

27. An absorbent pant, the absorbent pant having longitudinal and lateral centerlines which respectively define a longitudinal and a lateral direction, longitudinal and lateral sides which define the periphery of the absorbent pant, longitudinally opposed first and second waist regions, and a crotch region therebetween, each of said waist regions having first and second longitudinal edges, the absorbent pant comprising:

an outer cover;

an absorbent core joined to said outer cover, said absorbent core comprising at least a fluid redistribution component which is capable of redistributing aqueous body liquids from said crotch region to said waist regions;

a bolstering waist feature positioned in at least one of said waist regions, said bolstering waist feature being in effective fluid communication with said absorbent core, said bolstering waist feature having a caliper growth ratio of at least 5.0;

1 and a cantilever bending ratio of at least 1.1;

1;

means, disposed on said first and second waist regions, for creating lateral tension through at least a portion of said waist regions; and

seams joining said first longitudinal edge of said first waist region with said first longitudinal edge of said second waist region and said second longitudinal edge of said first waist region with said second longitudinal edge of said second waist region.

28. An absorbent article according to claim 27 wherein said outer cover comprises a liquid impervious backsheet and a liquid pervious topsheet joined with said backsheet, and said absorbent core is positioned between said topsheet and said backsheet, said absorbent core further comprising an acquisition component.

29. An absorbent article according to claim 28 wherein said means for creating lateral tension comprises elasticized side panels and said absorbent article further comprises longitudinally extending elasticized leg cuffs connectively associated with said longitudinal sides of said absorbent pant in at least said crotch region.

30. An absorbent article according to claim 27 wherein said bolstering waist feature extends longitudinally into both said first and second waist regions.