Absorbent article having enhanced leg curvature in use

• US 6,506,186 B1
• Filed: 05/03/2000
• Issued: 01/14/2003
• Est. Priority Date: 05/03/2000
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Travis, Gary Lee, Datta, Paul Joseph, VanGompel, Paul Theodore, Everson, Mark George, Roessler, Thomas Harold, Huang, Yung Hsiang, Morman, Michael Tod, Uitenbroek, Duane Girard
• Primary Examiner(s): Calvert, John J.
• Assistant Examiner(s): MUROMOTO JR, ROBERT H
• Application Number:
  US09/562,967
• Time in Patent Office: 986 Days
• Field of Search: 604/385.22, 604/385.25, 604/378
• US Class Current: 604/385.22
• CPC Class Codes: A61F 13/496 in the form of pants or briefs
• CPC Class Codes: A61F 13/51458 being air-pervious or breathable
• CPC Class Codes: A61F 13/51462 being defined by a value or parameter
• CPC Class Codes: A61F 13/51466 providing stretchability without the use of elastic material
• CPC Class Codes: A61F 13/51484 being inhomogeneous in the plane of the sheet, i.e. having zones of different properties or structures
• CPC Class Codes: A61F 13/5633 open type diaper
• CPC Class Codes: A61F 13/565 pants type diaper

Abstract

A disposable absorbent article is provided which includes a substantially liquid-impermeable outer cover, a liquid permeable bodyside liner, an absorbent body located between the outer cover and the bodyside liner, and a pair of leg elastics located on the laterally opposed side edges of the article in at least the intermediate section of the article. The outer cover can be configured to provide a substantially permanent deformation of at least about 10 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to the Material Elongation and Deformation Tensile Test set forth herein. The permanent deformation of the outer cover in use can result in the article having a substantially permanent leg elastic deformation value of at least about 3 percent when subjected to the Product Deformation Test set forth herein.

Claims

1. A disposable absorbent article which defines a front waist section, a rear waist section, an intermediate section which extends between and connects said waist sections, a pair of laterally opposed side edges, a pair of longitudinally opposed waist edges, a longitudinal direction and a lateral direction, said absorbent article comprising:

a) a substantially liquid-impermeable extensible outer cover;

b) a liquid permeable bodyside liner;

c) an absorbent body located between said extensible outer cover and said bodyside liner; and

d) a pair of leg elastics located on said laterally opposed side edges of said article in at least said intermediate section of said article;

wherein said article has a substantially permanent leg elastic deformation value of at least about 3 percent when subjected to a Product Deformation Test set forth in the Specification.

2. The disposable absorbent article of claim 1 wherein said extensible outer cover has a substantially permanent deformation of at least about 10 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to a Material Elongation and Deformation Tensile Test set forth in the Specification.

3. The disposable absorbent article of claim 1 wherein said extensible outer cover has a substantially permanent deformation of at least about 15 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to a Material Elongation and Deformation Tensile Test set forth in the Specification.

4. The disposable absorbent article of claim 1 wherein said extensible outer cover has a substantially permanent deformation of at least about 17 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to a Material Elongation and Deformation Tensile Test set forth in the Specification.

5. The disposable absorbent article of claim 1 wherein said extensible outer cover has an elongation of at least about 10 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to a Material Elongation and Deformation Tensile Test set forth in the Specification.

6. The disposable absorbent article of claim 1 wherein said extensible outer cover has an elongation of at least about 20 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to a Material Elongation and Deformation Tensile Test set forth in the Specification.

7. The disposable absorbent article of claim 1 wherein said leg elastic deformation value of said article is at least about 4 percent.

8. The disposable absorbent article of claim 1 wherein said leg elastic deformation value of said article is at least about 6 percent.

9. The disposable absorbent article of claim 1 wherein said extensible outer cover defines a water vapor transmission rate of at least about 800 g/m²/24 hr when subjected to a Mocon Water Vapor Transmission Test as set forth in the Specification.

10. The disposable absorbent article of claim 1 wherein said extensible outer cover defines a water vapor transmission rate of at least about 1200 g/m²/24 hr when subjected to a Mocon Water Vapor Transmission Test as set forth in the Specification.

11. The disposable absorbent article of claim 1 wherein said extensible outer cover comprises a necked laminate which includes at least one layer of a non-elastic neckable material and at least one layer of a non-elastic film.

12. A disposable absorbent article which defines a front waist section, a rear waist section, an intermediate section which extends between and connects said waist sections, a pair of laterally opposed side edges, a pair of longitudinally opposed waist edges, a longitudinal direction and a lateral direction, said absorbent article comprising:

a) a substantially liquid-impermeable, extensible outer cover that defines a water vapor transmission rate of at least about 800 g/m²/24 hr when subjected to a Mocon Water Vapor Transmission Test as set forth in the Specification wherein said extensible outer cover has a substantially permanent deformation of at least about 10 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to a Material Elongation and Deformation Tensile Test set forth in the Specification;

b) a liquid permeable bodyside liner;

c) an absorbent body located between said extensible outer cover and said bodyside liner;

d) a pair of fasteners located on said laterally opposed side edges in one of said waist sections of said absorbent article; and

e) a pair of leg elastics located on said laterally opposed side edges of said article in at least said intermediate section of said article;

wherein said article has a substantially permanent leg elastic deformation value of at least about 3 percent when subjected to a Product Deformation Test set forth in the Specification.

13. The disposable absorbent article of claim 12 wherein said substantially permanent deformation of said extensible outer cover is at least about 15 percent.

14. The disposable absorbent article of claim 12 wherein said substantially permanent deformation of said extensible outer cover is at least about 17 percent.

15. The disposable absorbent article of claim 12 wherein said extensible outer cover has an elongation of at least about 20 percent when subjected to said tensile force of 100 gmf per inch (per 2.54 cm) of width according to said Material Elongation and Deformation Tensile Test set forth in the Specification.

16. The disposable absorbent article of claim 12 wherein said leg elastic deformation value of said article is at least about 4 percent.

17. The disposable absorbent article of claim 12 wherein said leg elastic deformation value of said article is at least about 6 percent.

18. The disposable absorbent article of claim 12 wherein said water vapor transmission rate of said extensible outer cover is at least, about 1200 g/m²/24 hr.

19. The disposable absorbent article of claim 12 wherein said extensible outer cover comprises a necked laminate which includes at least one layer of a non-elastic neckable material and at least one layer of a non-elastic film.

20. A pant-like, disposable absorbent article which defines a front waist section, a rear waist section, an intermediate section which extends between and connects said waist sections, a pair of laterally opposed side edges, a pair of longitudinally opposed waist edges, a longitudinal direction and a lateral direction, said pant-like absorbent article comprising:

a) a substantially liquid-impermeable extensible outer cover that has an elongation of at least about 20 percent and a substantially permanent deformation of at least about 10 percent when subjected to a tensile force of 100 gmf per inch (per 2.54 cm) of width according to a Material Elongation and Deformation Tensile Test set forth in the Specification;

b) a liquid permeable bodyside liner;

c) an absorbent body located between said extensible outer cover and said bodyside liner;

d) a pair of fasteners refastenably attaching said laterally opposed side edges in said front waist section to said laterally opposed side edges in said rear waist section to provide said pant-like, prefastened absorbent article prior to packaging;

e) a pair of leg elastics located on said laterally opposed side edges of said article in at least said intermediate section of said article;

wherein said pant-like absorbent article has a substantially permanent leg elastic deformation value of at least about 3 percent when subjected to a Product Deformation Test set forth in the Specification.

21. The pant-like, prefastened, disposable absorbent article of claim 20 wherein said substantially permanent deformation of said extensible outer cover is at least about 15 percent.

22. The pant-like, prefastened, disposable absorbent article of claim 20 wherein said substantially permanent deformation of said extensible outer cover is at least about 17 percent.

23. The pant-like, prefastened, disposable absorbent article of claim 20 wherein said elongation of said extensible outer cover is at least about 30 percent.

24. The pant-like, prefastened, disposable absorbent article of claim 20 wherein said leg elastic deformation value of said article is at least about 4 percent.

25. The pant-like, prefastened, disposable absorbent article of claim 20 wherein said leg elastic deformation value of said article is at least about 6 percent.

26. The pant-like, prefastened, disposable absorbent article of claim 20 wherein said extensible outer cover defines a water vapor transmission rate of at least about 800 g/m²/24 hr when subjected to a Mocon Water Vapor Transmission Test as set forth in the Specification.

27. The pant-like, prefastened, disposable absorbent article of claim 26 wherein said water vapor transmission rate of said extensible outer cover is at least about 1200 g/m²/24 hr.

28. The pant-like, prefastened disposable absorbent article of claim 20 wherein said extensible outer cover comprises a necked laminate which includes at least one layer of a non-elastic neckable material and at least one layer of a non-elastic film.