Absorbent article which includes superabsorbent material located in discrete pockets having water-sensitive and water-insensitive containment structures

• US 5,433,715 A
• Filed: 10/29/1993
• Issued: 07/18/1995
• 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., Schroeder, Wen Z.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): ZUTTARELLI, ANTHONY
• Application Number:
  US08/145,925
• Time in Patent Office: 627 Days
• Field of Search: 604/358, 604/364, 604/365, 604/367, 604/368, 604/372, 604/378, 604/382, 604/385.1
• US Class Current: 604/368
• 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. A secondary attaching mechanism secures together the carrier layers along selected secondary attachment regions and provides a substantially water-insensitive connection therebetween. The secondary attachment regions are substantially restricted to locations spaced from the pocket regions.

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 first zones thereof, said carrier layers having substantially unattached zones providing a plurality of pocket regions with said substantially attached first zones located between said pocket regions;

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

secondary attaching means for securing together said carrier layers along selected secondary attachment regions and providing a substantially water-insensitive connection therebetween, said secondary attachment regions substantially restricted to locations spaced from said pocket regions;

wherein, said water-sensitive attachment means in said substantially attached first 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 secondary attaching means is substantially restricted to an outer periphery of said absorbent laminate.

3. An absorbent article as recited in claim 1, wherein said secondary attaching means is substantially restricted to an outer periphery of said absorbent laminate and interstitial locations between immediately adjacent pocket regions.

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

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

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

7. An absorbent article, as recited in claim 1, wherein said water-sensitive attaching means provides a dry bond strength of at least about 0.05N/cm.

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

9. An absorbent article, as recited in claim 8, wherein said second carrier layer has a burst strength of at least about 0.08N/cm.

10. An absorbent article, as recited in claim 9, wherein said first carrier layer comprises a wettable fibrous web.

11. An absorbent article, as recited in claim 10, wherein said second carrier layer is liquid permeable and comprises a wettable, fibrous web.

12. An absorbent article, as recited in claim 11, 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.

13. An absorbent article, as recited in claim 11, wherein at least one of said carrier layers is a high wet-strength tissue composed of cellulosic fibers.

14. An absorbent article as recited in claim 1, wherein said secondary attaching means includes lines of substantially water-insensitive attachment, said attachment lines having a width dimension of not more than about 3 cm.

15. An absorbent article as recited in claim 14, wherein said secondary attaching means includes lines of substantially water-insoluble adhesive.

16. An absorbent article as recited in claim 14, wherein said secondary attaching means includes lines of thermal bonds.

17. An absorbent article as recited in claim 14, wherein said water-sensitive attachment means provides a wet bond strength of not less than about 0.07N/cm.

18. An absorbent article as recited in claim 14, wherein said water-sensitive attachment means provides a wet bond strength of not less than about 0.09N/cm.

19. An absorbent article as recited in claim 18, wherein said water-sensitive attachment means provides a wet bond strength of not more than about 2N/cm.

20. An absorbent article as recited in claim 18, wherein said water-sensitive attachment means provides a wet bond strength of not more than about 1N/cm.

21. An absorbent article, as recited in claim 1, wherein said pocket regions are spaced apart from one another by a distance of not less than about 0.15 cm.

22. An absorbent article, as recited in claim 21, wherein immediately adjacent pocket regions are spaced apart from each other by a distance of not more than about 3 cm.

23. An absorbent article, as recited in claim 22, further comprising a surge management layer positioned generally adjacent a major bodyside surface of said absorbent laminate.

24. An absorbent article, as recited in claim 23, 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.

25. An absorbent article, as recited in claim 23, further comprising a distribution layer positioned next to a major outer side surface of said absorbent laminate.

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

27. An absorbent article, as recited in claim 26, wherein said distribution layer has a width which is within the range of about 75-175% of a corresponding width of said absorbent laminate.