Disposable absorbent article having an inflatable spacer

• US 5,330,459 A
• Filed: 06/23/1993
• Issued: 07/19/1994
• Est. Priority Date: 06/23/1993
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Beck, Theodora, Lavon, Gary D.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): ZUTTARELLI, ANTHONY
• Application Number:
  US08/081,536
• Time in Patent Office: 391 Days
• Field of Search: 604/358, 604/378, 604/385.1, 604/359, 604/360, 604/361, 604/364, 604/367, 604/381, 604/382
• US Class Current: 604/385.12
• 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
• CPC Class Codes: A61F 2013/51492 having specially shaped gas or air bubbles or bag-like structure

Abstract

A disposable diaper having an inflatable component is disclosed. The inflatable component comprises an inflatable spacer, a gas evolving material, and a port for receiving an activating material. The port can comprise a gas impermeable, liquid permeable membrane, an adhesive closure, or a mechanical closure. The inflatable spacer maintains a fecal void space intermediate the topsheet and the backsheet of the diaper.

Claims

1. A disposable absorbent article having a front edge, a rear edge, longitudinal edge, and longitudinal and lateral centerlines, the disposable absorbent article comprising:

a liquid impervious backsheet;

a liquid pervious topsheet joined to the backsheet, the liquid pervious topsheet having an aperture therethrough for receiving fecal matter;

an absorbent core disposed intermediate the topsheet and the backsheet;

an inflatable component comprising;

an inflatable spacer disposed intermediate the topsheet and the backsheet, the inflatable spacer having an inflated volume and inflated thickness for maintaining a fecal void space thickness intermediate the topsheet and the backsheet, the inflatable spacer comprising at least one inflatable spacer chamber;

a gas evolving material disposed within the inflatable component, the gas evolving material evolving a gas for inflating the inflatable spacer upon combining with an activating material; and

a port for receiving the activating material and communicating the activating material to the gas evolving material;

wherein the gas evolving material is disposed intermediate a gas permeable membrane and the port.

2. The disposable absorbent article of claim 1 wherein the port further comprises a semipermeable membrane.

3. The disposable absorbent article of claim 1 wherein the port further comprises an adhesive closure.

4. The disposable absorbent article of claim 1 wherein the port further comprises a mechanical closure.

5. The disposable absorbent article of claims 3 or 4 wherein the port is disposed in one of the absorbent article edges.

6. A disposable absorbent article having a front edge, a rear edge, longitudinal edges, and longitudinal and lateral centerlines, the disposable absorbent article comprising:

a liquid impervious backsheet;

a liquid pervious topsheet joined to the backsheet, the liquid pervious topsheet having an aperture therethrough for receiving fecal matter;

an absorbent core disposed intermediate the topsheet and the backsheet;

an inflatable spacer disposed intermediate the topsheet and the backsheet and having an inflated volume for maintaining a fecal void space intermediate the topsheet and the backsheet, the inflatable spacer comprising at least one inflatable spacer chamber; and

an acquisition component in fluid communication with the inflatable spacer chamber, the acquisition component comprising;

a gas evolving material disposed within the acquisition component, the gas evolving material evolving a gas for inflating the inflatable spacer chamber upon combining with an activating material; and

a cellulose acetate membrane for receiving the activating material and communicating the activating material to the gas evolving material, the cellulose acetate membrane positioned longitudinally intermediate the aperture in the topsheet and the front edge of the disposable absorbent article.

7. A disposable absorbent article having a front edge, a rear edge, longitudinal edges, and longitudinal and lateral centerlines, the disposable absorbent article comprising:

a liquid impervious backsheet;

a liquid pervious topsheet joined to the backsheet, the liquid pervious topsheet having an aperture therethrough for receiving fecal matter;

an absorbent core disposed intermediate the topsheet and the backsheet;

an inflatable component comprising;

an inflatable spacer disposed intermediate the topsheet and the backsheet and having an inflated volume for maintaining a fecal void space intermediate the topsheet and the backsheet, the inflatable spacer comprising at least one inflatable spacer chamber; and

an acquisition component in fluid communication with the inflatable spacer chamber, the acquisition component comprising;

a gas evolving material disposed within the acquisition component, the gas evolving material evolving a gas for inflating the inflatable spacer chamber upon combining with an activating material; and

a semipermeable membrane, at least a portion of the semipermeable membrane longitudinally positioned intermediate the aperture in the topsheet and the front edge of the disposable absorbent article.

8. The disposable absorbent article of claim 7 wherein the inflatable spacer is registered with the aperture in the topsheet.

9. The disposable absorbent article of claim 8 wherein the inflatable spacer comprises longitudinally extending portions registered with the aperture in the topsheet.

10. The disposable absorbent article of claim 9 wherein the inflatable spacer has an inflated shape comprising a generally U-shaped figure opening rearward and having a laterally extending portion disposed intermediate the aperture in the topsheet and the front edge of the disposable absorbent article.

11. The disposable absorbent article of claim 7 wherein the acquisition component has an inflated volume less than the inflated volume of the inflatable spacer.

12. The disposable absorbent article of claim 11 wherein the acquisition component has an inflated thickness less than an inflated thickness of the inflatable spacer.

13. The disposable absorbent article of claim 7 wherein the gas evolving material evolves carbon dioxide upon combining with water.

14. The disposable absorbent article of claim 13 wherein the gas evolving material comprises mixture of a powdered acid and a bicarbonate.

15. The disposable absorbent article of claim 7 wherein the gas evolving material is disposed in a pocket having a first boundary formed by the semipermeable membrane and a second boundary formed by a gas permeable membrane.

16. The disposable absorbent article of claim 15 wherein the gas evolving material is supported adjacent to the semipermeable membrane.

17. The disposable absorbent article of claim 15 wherein the gas permeable membrane is hydrophobic.

18. The disposable absorbent article of claim 16 comprising an osmotic promoter disposed in the pocket.

19. The disposable absorbent article of claim 18 wherein the osmotic promoter comprises a salt.

20. A disposable absorbent article having a front edge, a rear edge, longitudinal edges, and longitudinal and lateral centerlines, the disposable absorbent article comprising:

a liquid impervious backsheet;

a liquid pervious topsheet joined to the backsheet, the liquid pervious topsheet having an aperture therethrough for receiving fecal matter;

an absorbent core disposed intermediate the topsheet and the backsheet;

an inflatable component comprising;

an inflatable spacer disposed intermediate the topsheet and the backsheet and having an inflated volume for maintaining a fecal void space intermediate the topsheet and the backsheet, the inflatable spacer comprising at least one inflatable spacer chamber and having longitudinally extending portions registered with the aperture in the topsheet; and

an acquisition component in fluid communication with the inflatable spacer chamber and having an inflated volume less than the inflated volume of the inflatable spacer, the acquisition component comprising;

a pocket having first and second boundaries, the first boundary comprising a semipermeable membrane, the semipermeable membrane longitudinally positioned intermediate the aperture in the topsheet and the front edge of the disposable absorbent article, and the second boundary comprising a gas permeable membrane;

a mixture comprising a bicarbonate, a powdered acid, and a salt, the mixture supported adjacent the semipermeable membrane by the gas permeable membrane.

21. The disposable absorbent article of claim 20 wherein the gas permeable membrane is hydrophobic.