Absorbent article with unitary elastomeric waistband with multiple extension zones

• US 20040122411A1
• Filed: 12/20/2002
• Published: 06/24/2004
• Est. Priority Date: 12/20/2002
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Hancock-Cooke, Catherine M.
• Granted Patent: US 7,727,217 B2
• Time in Patent Office: Days
• US Class Current: 604/385.29
• CPC Class Codes: A61F 13/49011 the elastic means is located at the waist region
• CPC Class Codes: A61F 13/4902 characterised by the elastic material

Abstract

An absorbent article, such as a disposable diaper, includes a chassis having a front waist region, a back waist region, and a crotch region extending between the front and back waist regions. An outer cover member and a bodyside liner extend longitudinally between the front and back waist regions. An absorbent body structure is sandwiched between the outer cover member and the bodyside liner. A unitary elastomeric structure is attached to at least one of the front and back waist regions, the elastomeric structure extending completely across the respective waist region and extending beyond lateral sides of the chassis so as to form elastomeric attachment tabs. The elastomeric structure having a predetermined first modulus of elasticity such that when attached to said waist region, a resulting elastomeric waistband portion is defined having an overall second modulus of elasticity that is less than the first modulus of elasticity of the attachment tabs.

Claims

1. An absorbent article, comprising:

a chassis having a front waist region, a back waist region, and a crotch region extending between said front and back waist-regions;

an outer cover member and a bodyside liner extending longitudinally between said front and back waist regions;

an absorbent body structure sandwiched between said outer cover member and said bodyside liner;

a unitary elastomeric structure attached to at least one of said front and back waist regions, said elastomeric structure extending completely across said respective waist region and extending beyond lateral sides of said chassis so as to form elastomeric attachment tabs,

said elastomeric structure having a predetermined first modulus of elasticity such that when attached to said waist region, a resulting elastomeric waistband portion is defined having an overall second modulus of elasticity that is less than said first modulus of elasticity of said attachment tabs.

2. The absorbent article as in claim 1, wherein said article is a disposable diaper.

3. The absorbent article as in claim 1, wherein said elastomeric structure comprises a band of elastomeric material.

4. The absorbent article as in claim 1, wherein said elastomeric structure is attached to said waistband region in a tensioned state such that said resulting elastomeric waistband portion is gathered and stretchable at least to an extent permitted by the degree of gathering of said waistband region.

5. The absorbent article as in claim 4, wherein said elastomeric structure is tensioned to an extent less than a maximum elongation of said elastomeric structure such that stretchability of said waistband portion is limited by said degree of gathering, and said elastomeric attachment tabs are further stretchable upon said waistband portion being stretched to a maximum.

6. The absorbent article as in claim 1, wherein said waistband region is extensible, said elastomeric structure being attached to said waistband region in an untensioned state.

7. The absorbent article as in claim 1, wherein said elastomeric waistband portion comprises a varying modulus of elasticity therealong.

8. The absorbent article as in claim 7, wherein said elastomeric waistband portion comprises an increasing modulus of elasticity from a chassis centerline thereof towards said lateral sides.

9. The absorbent article as in claim 7, wherein said elastomeric waistband portion comprises a decreasing modulus of elasticity from a chassis centerline thereof towards said lateral sides.

10. The absorbent article as in claim 7, wherein said elastomeric structure is bonded to said waist region with a varying bond pattern to achieve said varying modulus of elasticity across said elastomeric waistband portion.

11. The absorbent article as in claim 8, wherein said elastomeric structure is bonded to said waist region with a greatest surface area bond coverage along a defined center portion extending laterally across said centerline, and is bonded to said waist region with less surface area bond coverage between said defined center portion and said lateral sides.

12. The absorbent article as in claim 11, wherein said less surface area bond coverage decreases according to a defined gradient.

13. The absorbent article as in claim 12, wherein said gradient is linear.

14. The absorbent article as in claim 1, further comprising a fastening device configured on said elastomeric attachment tabs.

15. The absorbent article as in claim 14, wherein said fastening device comprises an adhesive.

16. The absorbent article as in claim 14, wherein said fastening device comprises a hook material, said hook material engageable with a nonwoven web material on an outer side of said front waist region.

17. The absorbent article as in claim 1, wherein said absorbent structure comprises a band of stretch bonded laminate material.

18. An absorbent article, comprising:

a chassis having a front waist region, a back waist region, and a crotch region extending between said front and back waist regions;

an outer cover member and a bodyside liner extending longitudinally between said front and back waist regions;

an absorbent body structure sandwiched between said outer cover member and said bodyside liner;

a unitary elastomeric structure attached to at least one of said front and back waist regions, said elastomeric structure extending completely across said respective waist region between lateral sides of said chassis; and

wherein said elastomeric structure is bonded to said waist region with a varying bond pattern resulting in a varying modulus of elasticity across said elastomeric waistband portion.

19. The absorbent article as in claim 18, wherein said elastomeric structure is bonded to said waist region with a greatest surface area bond coverage along a defined center portion extending laterally across a longitudinal centerline of said chassis, and is bonded to said waist region with less surface area bond coverage between said defined center portion and said lateral sides.

20. The absorbent article as in claim 19, wherein said less surface area bond coverage decreases according to a defined gradient.

21. The absorbent article as in claim 20, wherein said gradient is linear.

22. The absorbent article as in claim 18, wherein said elastomeric structure extends beyond said lateral sides of said chassis and defines elastomeric attachment tabs, said attachment tabs having a modulus of elasticity different from said varying modulus of elasticity of said waistband portion.

23. The absorbent article as in claim 22, further comprising a fastening device configured on said elastomeric attachment tabs.

24. A disposable absorbent diaper, comprising:

a chassis having a front waist region, a back waist region, and a crotch region extending between said front and back waist regions;

an outer cover member and a bodyside liner extending longitudinally between said front and back waist regions;

an absorbent body structure sandwiched between said outer cover member and said bodyside liner;

an elastomeric structure attached to said back waist region, said elastomeric structure extending completely across said back waist region and extending beyond lateral sides of said chassis so as to form elastomeric attachment tabs,

said elastomeric structure attached in a tensioned state to at least one material along a transverse portion of said waist region so as to define an elastomeric waistband portion having a modulus of elasticity that is less than a modulus of elasticity of said attachment tabs.

25. The diaper as in claim 24, wherein said elastomeric structure comprises a unitary band of elastomeric material.

26. The diaper as in claim 24, wherein said elastomeric waistband portion comprises an increasing modulus of elasticity from a chassis longitudinal centerline towards said lateral sides.

27. The diaper as in claim 26, wherein said elastomeric structure is bonded to said waist region with a varying bond pattern to achieve said varying modulus of elasticity across said elastomeric waistband portion.

28. The diaper as in claim 25, wherein said elastomeric structure is bonded to said outer cover member and said bodyside liner along said elastomeric waistband portion.

29. The diaper as in claim 28, further comprising containment flaps disposed longitudinally along said bodyside liner on opposite sides of said absorbent structure, said containment flaps extending to said back waist region, said elastomeric structure bonded to said containment flaps.