Disposable absorbent article having a sealed expandable component

• US 5,520,674 A
• Filed: 05/31/1994
• Issued: 05/28/1996
• Est. Priority Date: 05/31/1994
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Lavon, Gary D., Hines, Letha M., Vinnage, William R. Jr.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): CUDDIHY, FRANCIS KEVIN
• Application Number:
  US08/251,801
• Time in Patent Office: 728 Days
• Field of Search: 604/358, 604/373, 604/385.1, 604/385.2, 472/54
• US Class Current: 604/385.16
• CPC Class Codes: A61F 13/47218 with a raised crotch region, e.g. hump
• CPC Class Codes: A61F 13/47227 for interlabial use
• CPC Class Codes: A61F 13/47263 with activating means, e.g. elastic, heat or chemical activatable means
• CPC Class Codes: A61F 13/495 with faecal cavity
• CPC Class Codes: A61F 2013/4956 with vertical spacer or separator keeping other components out of contact

Abstract

An absorbent article having an expandable component. The expandable component comprises a compressed, resilient element disposed within an air impermeable envelope. The compressed element provides the absorbent article with a thin, low bulk profile prior to use of the disposable absorbent article, thereby reducing shipping and storage space. At the point of use of the absorbent article, the air impervious envelope is opened, thereby permitting entry of air into the envelope and expansion of the compressed element. In one embodiment the expandable component is a spacer for maintaining fecal void space in a disposable diaper. Alternatively, the expandable component can provide displacement of the topsheet relative to the backsheet along the longitudinal centerline of a sanitary napkin.

Claims

1. A disposable absorbent article comprising:

a backsheet;

a liquid pervious topsheet joined to the backsheet;

an absorbent core disposed intermediate the topsheet and the backsheet; and

an expandable component disposed on the absorbent article, the expandable component comprising a resilient element compressed within a sealed air impermeable envelope, the expandable component expandable from a first thickness when compressed to a second thickness greater that the first thickness upon removing a portion of the envelope and equalizing the pressure inside the opened envelope with the atmospheric pressure outside the opened envelope when the resilient element is expanded to its free unrestrained thickness.

2. A disposable absorbent article comprising:

a backsheet;

a liquid pervious topsheet joined to the backsheet;

an absorbent core disposed intermediate the topsheet and the backsheet; and

,

an expandable component disposed on the absorbent article, the expandable component comprising a resilient element compressed within a sealed air impermeable envelope, the expandable component expandable from a first thickness when compressed to a second thickness greater than the first thickness upon opening of the sealed air impermeable envelope and equalizing the pressure inside the opened envelope with the atmospheric pressure outside the opened envelope when the resilient element is expanded to its free unrestrained thickness.

3. The disposable absorbent article of claim 2 wherein the resilient element is porous.

4. The disposable absorbent article of claim 3 wherein the resilient element comprises an open celled foam.

5. The disposable absorbent article of claim 2 wherein the second thickness is at least about twice the first thickness.

6. The disposable absorbent article of claim 2 wherein the air impermeable envelope comprises a port having a releasable closure.

7. The disposable absorbent article of claim 6 wherein the port closure is resealable.

8. The disposable absorbent article of claim 2 wherein the resilient element is disposed intermediate the topsheet and the backsheet.

9. The disposable absorbent article of claim 8 wherein the resilient element is disposed intermediate the backsheet and the absorbent core.

10. The disposable absorbent article of claim 2 wherein the expandable component is joined directly to the backsheet.

11. The disposable absorbent article of claim 2 wherein the backsheet comprises at least a portion of the air impermeable envelope.

12. The disposable absorbent article of claim 2 wherein the disposable absorbent article comprises a disposable diaper, and wherein the expandable component comprises a spacer disposed intermediate the topsheet and the backsheet for maintaining a Z-direction fecal void space.

13. The disposable absorbent article of claim 12 wherein the spacer has longitudinally extending portions joined by a laterally extending portion.

14. The disposable absorbent article of claim 13 wherein the topsheet has an aperture therethrough for receiving fecal matter, and wherein the spacer is registered with the aperture.

15. The disposable absorbent article of claim 13 wherein the spacer has an expanded shape comprising a generally U-shaped figure opening rearward.

16. The disposable absorbent article of claim 13 wherein the spacer has an expanded shape comprising a closed figure.

17. The disposable absorbent article of claim 2 wherein the expandable component comprises at least a portion of a seal for reducing the leakage of body exudates from between the disposable absorbent article and the wearer'"'"'s skin.

18. The disposable absorbent article of claim 17 wherein the disposable absorbent article comprises a disposable diaper having front and rear waist regions, and wherein the expandable component is disposed in at least one of the front and rear waist regions.

19. The disposable absorbent article of claim 17 wherein the disposable absorbent article comprises a disposable diaper having side margins, and wherein the expandable component is disposed in at least one of the side margins.

20. The disposable absorbent article of claim 17 further comprising a leg cuff, and wherein the leg cuff comprises an expandable component.

21. The disposable absorbent article of claim 2 wherein the air impermeable envelope is evacuated to have an internal pressure less than atmospheric pressure.

22. A sanitary napkin having a front edge, a rear edge, longitudinal edges, and longitudinal and lateral centerlines, the sanitary napkin comprising:

a liquid pervious topsheet;

a backsheet joined to the topsheet;

an absorbent core intermediate the topsheet and the backsheet; and

an expandable component disposed on the sanitary napkin, the expandable component comprising a compressed resilient element disposed within an air impermeable envelope, the expandable component expandable from a first thickness to a second thickness greater than the first thickness upon opening of the air impermeable envelope.

23. The sanitary napkin of claim 22 wherein tile compressed resilient element is disposed intermediate the topsheet and the backsheet.

24. The sanitary napkin of claim 23 wherein the compressed resilient element is disposed intermediate the backsheet and the absorbent core.

25. The sanitary napkin of claim 22 wherein the compressed resilient element has a longitudinally extending portion aligned with the longitudinal centerline of the sanitary napkin.

26. The disposable absorbent article of claim 22 wherein the resilient element is porous.

27. The disposable absorbent article of claim 26 wherein the resilient element comprises an open celled foam.

28. The disposable absorbent article of claim 22 wherein the second thickness is at least about twice the first thickness.

29. The disposable absorbent article of claim 22 wherein the air impermeable envelope comprises a port having a releasable closure.