Absorbent article which includes superabsorbent material located in discrete pockets having an improved containment structure

• US 5,411,497 A
• Filed: 10/29/1993
• Issued: 05/02/1995
• Est. Priority Date: 10/29/1993
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Corporation
• Inventors: Abuto, Frank P., Kellenberger, Stanley R., Rippl, Carl G., Robinson, Mark L., Zenker, David L., Tanzer, Richard W., Pomplun, William S., Laux, Daniel R., Sallee, Lorry F., Yarbrough, Sandra M., Nortman, Brian K.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): ZUTTARELLI, ANTHONY
• Application Number:
  US08/145,924
• Time in Patent Office: 550 Days
• Field of Search: 604/358, 604/368, 604/378, 604/381, 604/382, 604/384, 604/385.1, 604/367, 604/372
• US Class Current: 604/368
• CPC Class Codes: A61F 13/532 inhomogeneous in the plane of the pad
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets

Abstract

An absorbent article comprises a first, liquid-permeable carrier layer and at least a second carrier layer. A water sensitive attaching mechanism secures together the carrier layers to provide substantially attached zones and substantially unattached zones thereof. The substantially unattached zones provide a plurality of pocket regions, and a high absorbency material is located within the pocket regions to provide an absorbent laminate.

Claims

1. An absorbent article, comprising:

a first, liquid-permeable carrier layer and at least a second carrier layer;

water-sensitive attaching means for securing together said carrier layers at substantially attached zones thereof, said carrier layers having substantially unattached zones providing a plurality of pocket regions with said substantially attached zones located between said pocket regions; and

high-absorbency material located within said pocket regions to provide an absorbent laminate;

wherein, said water-sensitive attachment means in said substantially attached zones provides a wet strength adequate to hold said carrier layers together when wet, and wherein said wet strength is less than a separating force imparted by a swelling of said high-absorbency material when said high-absorbency material is exposed to an aqueous liquid.

2. An absorbent article, as recited in claim 1, wherein said water-sensitive attachment means is configured to release at an applied load which delaminates said carrier layers without excessively tearing at least one of said carrier layers when said carrier layers are wetted with an aqueous liquid.

3. An absorbent article, as recited in claim 1, wherein said water-sensitive attachment means provides a wet bond strength of not less than about 0.04 N/cm.

4. An absorbent article, as recited in claim 3, wherein said water-sensitive attachment means provides a wet bond strength of not more than about 5 N/cm.

5. An absorbent article, as recited in claim 4, wherein said water-sensitive attaching means provides a dry bond strength of at least about 0.05 N/cm.

6. An absorbent article, as recited in claim 5, wherein said water-sensitive attaching means comprises an adhesive applied at an add-on amount of not more than about 150 grams per square meter.

7. An absorbent article, as recited in claim 6, wherein said water-sensitive attaching means comprises an adhesive applied at an add-on amount of not less than about 7.5 grams per square meter.

8. An absorbent article, as recited in claim 7, wherein said water-sensitive attaching means comprises an adhesive applied as a pattern of adhesive globules.

9. An absorbent article, as recited in claim 8, wherein said water-sensitive attaching means comprises an adhesive applied as a pattern of adhesive filaments.

10. An absorbent article, as recited in claim 1, wherein said first carrier layer has a burst strength of at least about 0.08 N/cm.

11. An absorbent article, as recited in claim 10, wherein said second carrier layer has a burst strength of at least about 0.08 N/cm.

12. An absorbent article, as recited in claim 11, wherein said first carrier layer comprises a wettable fibrous web.

13. An absorbent article, as recited in claim 12, wherein said second carrier layer is liquid permeable and comprises a wettable, fibrous web.

14. An absorbent article, as recited in claim 13, wherein at least one of said carrier layers is a web which includes meltblown fibers and wherein said meltblown web is configured to provide water-sensitivity to said water-sensitive attaching means.

15. An absorbent article, as recited in claim 13, wherein at least one of said carrier layers is a high wet-strength tissue composed of cellulosic fibers.

16. An absorbent article, as recited in claim 15, wherein at least one of said carrier layers is a high wet-strength tissue composed of cellulosic fibers and having a selected pattern of embossments formed therein.

17. An absorbent article, as recited in claim 5, wherein said pocket regions are spaced apart from one another by a distance of not less than about 0.15 cm.

18. An absorbent article, as recited in claim 17, wherein immediately adjacent pocket regions are spaced apart from each other by a distance of not more than about 3 cm.

19. An absorbent article, as recited in claim 18, further comprising a surge management layer positioned generally adjacent a major bodyside surface of said absorbent laminate.

20. An absorbent article, as recited in claim 19, wherein said surge management layer is composed of a nonwoven fibrous web composed of synthetic fibers and having a basis weight within the range of about 24-300 gsm.

21. An absorbent article, as recited in claim 19, further comprising a distribution layer positioned next to a major outerside surface of said absorbent laminate.

22. An absorbent article, as recited in claim 19, wherein said distribution layer has a length which is within the range of about 75-175% of a corresponding length of said absorbent laminate.

23. An absorbent article, as recited in claim 22, wherein said distribution layer has a width which is within the range of about 75-175% of a corresponding width of said absorbent laminate.

24. An absorbent article as recited in claim 3, wherein said water-sensitive attachment means provides a wet bond strength of not less than about 0.07 N/cm.

25. An absorbent article as recited in claim 3, wherein said water-sensitive attachment means provides a wet bond strength of not less than about 0.09 N/cm.

26. An absorbent article as recited in claim 25, wherein said water-sensitive attachment means provides a wet bond strength of not more than about 2 N/cm.

27. An absorbent article as recited in claim 25, wherein said water-sensitive attachment means provides a wet bond strength of not more than about 1 N/cm.