Absorbent article which includes superabsorbent material located in discrete, elongate pockets placed in selected patterns

• US 5,593,399 A
• Filed: 01/06/1995
• Issued: 01/14/1997
• 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., Rippl, Carl G., Robinson, Mark L., Zenker, David L., Tanzer, Richard W., Laux, Daniel R., Sallee, Lorry F., Yarbrough, Sandra M., Nortman, Brian K., Schroeder, Wen Z., Kellenberger, Stanley R., Pomplun, William S.
• Primary Examiner(s): Jones, Mary Beth
• Assistant Examiner(s): ZUTTARELLI, ANTHONY
• Application Number:
  US08/369,558
• Time in Patent Office: 739 Days
• Field of Search: 604/358, 604/368, 604/372, 604/378, 604/381-82, 604/384, 604/385.1
• US Class Current: 604/368
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 2013/53916 with epicyclical pattern
• CPC Class Codes: A61F 2013/53933 with water-soluble binder

Abstract

An absorbent article comprises a first, liquid-permeable carrier layer and at least a second carrier layer. A carrier attaching mechanism secures together the carrier layers to provide substantially attached zones and a multiplicity of substantially unattached zones thereof. The substantially unattached zones provide a plurality of pocket regions, and high-absorbency material is located within the pocket regions to provide an absorbent laminate having a laminate length and a laminate width. A selected plurality of the pocket regions can, for example, be configured with an elongate shape having a major axis length and a relatively shorter minor axis width. The selected plurality of elongate pocket regions is included within a dispersed pocket array having a non-contiguous, labyrinth configuration of pockets. For example the pocket array can include a plurality of regular or irregular rows of pocket regions, and immediately adjacent rows portions of the array can have pocket regions which are arranged in a non-contiguous and staggered configuration. In particular aspects of the invention, the carrier attaching mechanism can be water-sensitive.

Claims

1. An absorbent article, comprising:

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

water-sensitive carrier 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 having a laminate length and a laminate width;

wherein

said water-sensitive carrier attaching means provides a wet strength adequate to hold said carrier layers together when wet, and 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;

said plurality of pocket regions are included within a dispersed pocket array;

said pocket array includes a plurality of elongate pocket regions which have major and minor axes thereof; and

said elongate pocket regions are arranged in a non-contiguous and staggered configuration with immediately adjacent pocket regions of said staggered configuration having a separation distance therebetween.

2. An absorbent article as recited in claim 1, wherein said elongate pocket regions have a length-to-width aspect ratio of not less than about 1.1:

1.

3. An absorbent article as recited in claim 2, wherein said elongate pocket regions have a length-to-width aspect ratio of not less than about 1.5:

1.

4. An absorbent article as recited in claim 1, wherein each of said elongate pocket regions have a width dimension of not more than about 5 cm.

5. An absorbent article as recited in claim 4, wherein each of said elongate pocket regions have a length dimension of not more than about 75% of said laminate length.

6. An absorbent article as recited in claim 5, wherein each of said elongate pocket regions have a length dimension of not more than about 50% of said laminate width.

7. An absorbent article as recited in claim 1, wherein a first plurality of elongate pocket regions are located in an intermediate section of said article and have the major axes thereof substantially aligned along a longitudinal direction of said article.

8. An absorbent article as recited in claim 7, wherein a second plurality of elongate pocket regions are located in at least one waistband section of said article and have the major axes thereof substantially aligned along a cross-direction of said article.

9. An absorbent article as recited in claim 7, wherein said pocket array includes elongate pocket regions having the major axes thereof cooperatively arranged in a convergent pattern relative to a longitudinal line of said laminate.

10. An absorbent article as recited in claim 7, wherein said pocket array includes elongate pocket regions having the major axes thereof cooperatively arranged in a divergent pattern relative to a longitudinal line of said laminate.

11. An absorbent article as recited in claim 1, wherein said pocket array includes elongate pocket regions located adjacent a periphery of said laminate, said periphery having curvilinear regions thereof, and said peripheral elongate pocket regions selectively arranged with the major axes thereof substantially aligned substantially parallel with respectively adjacent portions of said laminate periphery.

12. An absorbent article as recited in claim 1, wherein each of said pocket array includes elongate pocket regions having the major axes thereof cooperatively arranged in a convergent pattern, and said convergent pattern is located at an intermediate crotch section of said laminate.

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

14. An absorbent article, as recited in claim 13, wherein said water-sensitive attachment means provides a wet bond strength of not less than about 0.04 N/cm.

15. An absorbent article, as recited in claim 14, wherein said water-sensitive attachment means provides a wet bond strength of not more than about 5 N/cm.

16. An absorbent article, as recited in claim 15, wherein said water-sensitive attaching means provides a dry bond strength of at least about 0.05 N/cm.

17. An absorbent article, as recited in claim 13, wherein said first carrier layer has a burst strength of at least about 0.08 N/cm.

18. An absorbent article, as recited in claim 17, wherein said second carrier layer has a burst strength of at least about 0.08 N/cm.

19. An absorbent article, as recited in claim 18, wherein said first carrier layer comprises a wettable fibrous web.

20. An absorbent article, as recited in claim 19, wherein said second carrier layer is liquid permeable and comprises a wettable, fibrous web.

21. An absorbent article, as recited in claim 20, 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.

22. 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.

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

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

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

26. An absorbent article, as recited in claim 24, further comprising a distribution layer positioned next to a major outerside surface of said absorbent laminate.

27. An absorbent article, comprising:

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

carrier attaching means for securing together said carrier layers to provide substantially attached zones and substantially unattached zones thereof, said substantially unattached zones providing a plurality of pocket regions and said substantially attached zones located between said pocket regions; and

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

wherein

said water-sensitive carrier attaching means provides a wet strength adequate to hold said carrier layers together when wet, and said wet strengths 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;

said plurality of pocket regions are included within a dispersed pocket array;

said pocket array includes elongate pocket regions which have major and minor axes thereof and are arranged in a non-contiguous and staggered configuration;

a first plurality of said elongate pocket regions are located in an intermediate section of said article with the major axes thereof cooperatively arranged in a convergent pattern relative to a longitudinal line of said laminate; and

a second plurality of said elongate pocket regions are located in at least one waistband section of said article with the major axes thereof substantially aligned along a cross-direction of said article.

28. An absorbent article as recited in claim 27, wherein said convergent pattern is located at an intermediate crotch section of said laminate.

29. An absorbent article as recited in claim 28, further comprising a second plurality of elongate pocket regions which are located in at least one waistband section of said article and have the major axes thereof substantially aligned along a cross-direction of said article.

30. An absorbent article as recited in claim 29, wherein said pocket array further includes elongate pocket regions having the major axes thereof cooperatively arranged in a divergent pattern relative to a longitudinal line of said laminate.

31. An absorbent article, comprising:

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

carrier attaching means for securing together said carrier layers to provide substantially attached zones and substantially unattached zones thereof, said substantially unattached zones providing a plurality of pocket regions and said substantially attached zones located between said pocket regions; and

high-absorbency material located within said pocket regions to provide an absorbent laminate having a periphery with curvilinear regions thereof;

wherein

said water-sensitive carrier attaching means provides a wet strength adequate to hold said carrier layers together when wet, and 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;

said plurality of pocket regions are included within a dispersed pocket array;

said pocket array includes elongate pocket regions which are arranged in a non-contiguous and staggered configuration and have major and minor axes thereof;

said pocket array includes peripheral elongate pocket regions located adjacent said curvilinear regions of said periphery, said peripheral elongate pocket regions selectively arranged with major axes thereof aligned substantially parallel with respectively adjacent portions of said laminate periphery; and

said pocket array includes a first plurality of said elongate pocket regions which are located in an intermediate section of said article with the major axes thereof cooperatively arranged in a convergent pattern relative to a longitudinal line of said laminate.

32. An absorbent article, comprising:

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

carrier 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 having a laminate length and a laminate width;

wherein

said water-sensitive carrier attaching means provides a wet strength adequate to hold said carrier layers together when wet, and 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;

said plurality of pocket regions are included within a dispersed pocket array;

said pocket array includes a plurality of elongate pocket regions which have major and minor axes thereof; and

said elongate pocket regions are arranged in a non-contiguous and staggered configuration with immediately adjacent pocket regions of said staggered configuration having a separation distance of at least about 15% of a width dimension of said immediately adjacent pocket regions.

33. An absorbent article as recited in claim 32, wherein said pocket regions have relatively smaller and larger sizes and said separation distance between immediately adjacent pocket regions is at least about 15% of a width dimension of a smaller of said immediately adjacent pocket regions.