Absorbent Article Saturation Indication System and Method

• US 20100152642A1
• Filed: 12/17/2008
• Published: 06/17/2010
• Est. Priority Date: 12/17/2008
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Kim, Jaeho, MacDonald, John Gavin
• Granted Patent: US 8,247,638 B2
• Time in Patent Office: Days
• US Class Current: 604/11
• CPC Class Codes: A61F 13/2051 characterised by the material or the structure of the inner absorbing core
• CPC Class Codes: A61F 13/34 Means for withdrawing tampons , e.g. withdrawal strings
• CPC Class Codes: A61F 13/42 with wetness indicator or alarm
• CPC Class Codes: A61F 13/49 Absorbent articles specially adapted to be worn around the waist, e.g. diapers

Abstract

An absorbent article includes an absorbent body in contact with a moisture activatable shrinking yarn in the form of a metering string. The metering string includes a hanging portion that is at least initially visible to a user when the absorbent article is in use. By observing the change in length of the hanging portion, a user wearing the absorbent article can determine how saturated the absorbent article has become. The metering string may be used with absorbent articles such as tampons and diapers.

Claims

1. An absorbent article comprising:

an absorbent body having a first end and an opposite second end, and defining a length;

a metering string attached to the absorbent body, the metering string comprising an internal portion that maintains contact with the absorbent body and a hanging portion that hangs freely from the absorbent body, wherein the metering string comprises a moisture-activated shrinking material.

2. The absorbent article of claim 1 further comprising a backsheet layer on which the absorbent body is superposed in an adjacent facing relationship;

and

a liner that covers the absorbent body;

wherein the liner and the backsheet layer are attached together around the perimeter of the absorbent body except where the metering string is located.

3. The absorbent article of claim 2 further comprising a front waist band located adjacent the first end of the absorbent body;

and a back waist band located adjacent the second end of the absorbent body, wherein the hanging portion extends from the front waist band or the back waist band.

4. The absorbent article of claim 1 wherein the absorbent body comprises a diaper absorbent core.

5. The absorbent article of claim 1 wherein the absorbent body comprises a tampon pledget.

6. The absorbent article of claim 5 wherein the metering string is greater in length than the absorbent body length and further comprises a withdrawl string attached to the second end.

17. The tampon according to claim 4 wherein the wound portion is longer than three times the pledget circumference.

7. A method of signaling the fullness of a tampon in a vagina comprising the steps of:

providing a tampon having a withdrawl string and a metering string extending from a proximal end thereof, wherein the withdrawl string has a reference length;

inserting the tampon into the vagina; and

comparing the metering string length to the reference length.

8. A tampon comprising:

a pledget having a circumference, a distal end for insertion and a proximal end opposite thereof;

a withdrawl string having a reference length, the withdrawl string attached to and extending from the proximal end of the pledget; and

a metering string comprised of a moisture-activated shrinking yarn, the metering string having an internal portion and a hanging portion, wherein the internal portion is in contact with the pledget and extends from the distal end to the proximal end, and the hanging portion extends from the proximal end of the pledget, adjacent the withdrawl string.

9. The tampon according to claim 8 wherein the withdrawl string comprises a series of colored zones for visual reference.

10. The tampon according to claim 9 wherein the metering string comprises a series of colored zones for visual reference.

11. The tampon according to claim 8 wherein the metering string comprises a series of colored zones for visual reference.

12. The tampon according to claim 8 wherein the hanging portion has a length substantially equal to the reference length.

13. The tampon according to claim 8 wherein the internal portion of the metering string is wound about the pledget to form a wound portion.

14. The tampon according to claim 13 wherein the wound portion extends from the distal end of the pledget to the proximal end.

15. The tampon according to claim 14 wherein the wound portion does not overlap itself.

16. The tampon according to claim 13 wherein the wound portion is has a length that is two to five times the pledget circumference.

18. The tampon according to claim 8 wherein the internal portion is embedded within the pledget.

19. The tampon according to claim 18 wherein the internal portion is disposed at a longitudinal axis of the pledget.

20. The tampon according to claim 8 wherein the metering string consists of a single filament.