Absorbent article with dynamic elastic feature comprising elasticized hip panels

• US 5,575,783 A
• Filed: 04/07/1994
• Issued: 11/19/1996
• Est. Priority Date: 09/28/1992
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Nakahata, Hiroshi, Clear, Sandra H., Rollag, Keith W.
• Primary Examiner(s): Willse, David H.
• Application Number:
  US08/225,357
• Time in Patent Office: 957 Days
• Field of Search: 604/385.2, 604/378, 604/385.1, 2/78 B, 2/78 C, 2/78.1, 2/78.2, 2/78.3, 2/400-402, 156/163, 156/164
• US Class Current: 604/385.22
• CPC Class Codes: A61F 13/49009 with elastic means
• CPC Class Codes: A61F 13/49011 the elastic means is located at the waist region
• CPC Class Codes: A61F 13/49014 the elastic means is located at the side panels
• CPC Class Codes: A61F 13/5633 open type diaper
• CPC Class Codes: A61F 2013/49047 at the ears
• CPC Class Codes: A61F 2013/4905 at the waist

Abstract

Absorbent articles such as disposable diapers, incontinent briefs, diaper holders, training pants, and the like, that provide dynamic fit about the wearer by the use of elasticized hip panels. Such absorbent articles comprise a liquid pervious topsheet; a liquid impervious backsheet; an absorbent core disposed between the topsheet and the backsheet; elasticized side panels positioned in the side panels of the back waist region; and an elasticized hip panel positioned in the central region of the back waist region. The elasticized hip panel comprises a stretch laminate comprising one or more elongatable components and an elastic hip panel member that are mechanically stretched to allow expansion of the stretch laminate beyond the original planar state of the diaper in the lateral direction. By adding stretch to the middle-back of the absorbent article, the absorbent article is capable of expanding in the back waist region thereby creating a more three-dimensional fit to better contour the hips and buttocks and to more completely wrap the wearer'"'"'s hips and buttocks. In an alternative embodiment, a single elastic hip panel member is positioned in most of the central region of the back waist region with the stretch laminate being mechanically stretched in selected zones or preferably over the entire area of the elastic hip panel member. The absorbent core is either stretchable or preferably not attached to the stretch laminate in the mechanically stretched zones to not encumber the stretch of the stretch laminate. The topsheet is also preferably stretchable.

Claims

1. A disposable absorbent article having a first waist region, a second waist region having a central region and a side panel on each side of said central region, a longitudinal centerline, a lateral centerline, longitudinal edges, and end edges, the absorbent article having comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to said topsheet;

an absorbent core having side edges and waist edges and being disposed between said topsheet and said backsheet;

an elasticized side panel disposed in each said side panel of said second waist region, each said elasticized side panel being elastically extensible in the lateral direction; and

an elasticized hip panel disposed in said central region of said second waist region at least longitudinally inwardly from said waist edge of said absorbent core toward said lateral centerline, said elasticized hip panel comprising a stretch laminate comprising a portion of said backsheet and an elastic hip panel member, at least a portion of said elastic hip panel member extending longitudinally outwardly from each said side edge of said absorbent core, said stretch laminate being mechanically stretched so that said backsheet is, at least to a degree, permanently elongated so as to not fully return to its original undeformed configuration such that said elasticized hip panel member is capable of elastically expanding beyond the original planar state of the absorbent article in at least the lateral direction to fit about the hips and buttocks.

2. The absorbent article of claim 1 wherein said stretch laminate is activated by mechanically stretching in the zones wherein said elastic hip panel member extends laterally outwardly from each side edge of said absorbent core.

3. The absorbent article of claim 1 wherein said stretch laminate is activated by mechanically stretching over the entire area of said elastic hip panel member.

4. The absorbent article of claim 3 wherein said absorbent core is stretchable to allow unencumbered expansion of said stretch laminate.

5. The absorbent article of claim 3 wherein said stretch laminate additionally comprises a portion of said absorbent core.

6. The absorbent article of claim 5 wherein said stretch laminate additionally comprises a portion of said topsheet.

7. The absorbent article of claim 5 wherein said elastic hip panel member comprises an elastomeric foam.

8. A disposable absorbent article having a first waist region, second waist region having a central region and a side panel on each side of said central region, longitudinal edges, and end edges, the absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to said topsheet;

an absorbent core having side edges and disposed between said topsheet and said backsheet;

an elasticized side panel disposed in each said side panel of said back waist region, each elasticized side panel being elastically extensible in the lateral direction;

an elasticized hip panel disposed in said central region of said second waist region, said hip elasticized hip panel comprising a stretch laminate comprising a portion of said backsheet, a laminate coversheet positioned between said backsheet and said absorbent core, and an elastic hip panel member disposed between said backsheet and said laminate coversheet, said elastic hip panel member extending longitudinally inwardly from said end edge of the absorbent article to about said longitudinal centerline and extending laterally outwardly from each said side edge of said absorbent core to about said elasticized side panel, said stretch laminate being mechanically stretched over the entire area of said elastic hip panel so that said backsheet and said laminate coversheet are, at least to a degree, permanently elongated so as to not fully return to their original undeformed configuration such that said elasticized hip panel is capable of elastically expanding beyond the original planar state of the absorbent article on at least the lateral direction; and

said absorbent core being unsecured to said stretch laminate in at least selected zones to allow unencumbered expansion of said stretch laminate.

9. The absorbent article of claim 8 wherein said topsheet is stretchable in at least said central region.

10. The absorbent article of claim 9 wherein said stretch laminate comprises a zero strain stretch laminate.

11. The absorbent article of claim 10 wherein said elastic hip panel member comprises an elastomeric adhesive.

12. The absorbent article of claim 11 wherein each said elastic panel member has a semi-elliptical shape.

13. The absorbent article of claim 12 wherein said absorbent core is unsecured to said stretch laminate over the entire area of said stretch laminate.

14. A disposable absorbent article having a first waist region, a second waist region having a central region and a side panel on each side of said central region, longitudinal edges, and end edges, the absorbent article comprising:

a liquid pervious topsheet;

a liquid impervious backsheet joined to said topsheet;

an absorbent core having side edges and waist edges, said absorbent core being disposed between said topsheet and said backsheet;

an elastic waist feature extending longitudinally outwardly from said waist edge of said absorbent core in said central region of said second waist region;

an elasticized side panel disposed in each said side panel of said second waist region, each said elasticized side panel being elastically extensible in the lateral direction; and

an elasticized hip panel disposed in said central region of said second waist region laterally outwardly from each said side edge of said absorbent core, laterally inwardly of said elasticized side panel, and longitudinally inwardly from said elastic waist feature, each said elasticized hip panel comprising a stretch laminate comprising a portion of said backsheet, a portion of said topsheet, and an elastic hip panel member positioned between said topsheet and said backsheet, each said stretch laminate being mechanically stretched so that said backsheet and said topsheet are, at least to a degree, permanently elongated so as to not fully return to their original undeformed configuration such that each said elasticized hip panel is capable of elastically expanding beyond the original planar state of the absorbent article in at least the lateral direction.

15. The absorbent article of claim 14 wherein each said elasticized hip panel comprises a zero strain stretch laminate.

16. The absorbent article of claim 15 wherein each said elasticized side panel comprises a stretch laminate, said stretch laminate comprising a portion of said topsheet, a portion of said backsheet, and an elastic side panel member positioned therebetween, said stretch laminate being mechanically stretched.