Liquid absorbent material for personal care absorbent articles and the like

• US 6,221,460 B1
• Filed: 09/12/1995
• Issued: 04/24/2001
• Est. Priority Date: 12/17/1993
• Status: Expired due to Fees

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Collier, Leslie Warren IV, Mayberry, Pamela Jean, Meitner, Gary Howard, Weber, Mary Eva Garvie, Davis, James Arthur, Morman, Michael Tod, Cole, Douglas Bryan, Kollin, Nancy Donaldson, Gryskiewicz, Stanley Michael
• Primary Examiner(s): Cole, Elizabeth M.
• Application Number:
  US08/527,284
• Time in Patent Office: 2,051 Days
• Field of Search: 428/198, 428/116, 428/117, 428/131, 428/137, 428/373, 428/156, 428/168, 604/359, 604/368, 604/385.1
• US Class Current: 428/131
• CPC Class Codes: A61F 13/4942 the barrier not being integral with the top- or back-sheet
• CPC Class Codes: A61F 13/49426 the barrier having an absorbent medium
• CPC Class Codes: A61F 13/4946 the edge leakage prevention means being an absorbent medium A61F13/49426 takes precedence
• CPC Class Codes: A61F 13/49466 the edge leakage prevention means being at the waist region
• CPC Class Codes: A61F 13/511 Topsheet, i.e. the permeable cover or layer facing the skin
• CPC Class Codes: A61F 13/53436 having an undulated or corrugated cross-section
• CPC Class Codes: A61F 13/535 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes A61F13/5323, A61F13/537 take precedence
• CPC Class Codes: A61F 2013/530481 having superabsorbent materials, i.e. highly absorbent polymer gel materials
• CPC Class Codes: A61F 2013/8408 with odour control
• CPC Class Codes: Y10T 428/24273 including aperture
• CPC Class Codes: Y10T 428/24322 Composite web or sheet
• CPC Class Codes: Y10T 428/24479 including variation in thickness
• CPC Class Codes: Y10T 428/24579 with particulate matter
• CPC Class Codes: Y10T 428/24826 Spot bonds connect components

Abstract

Disclosed herein is a liquid absorbent material that is particularly useful as a liner material for personal care absorbent articles such as diapers, training pants, incontinence garments, sanitary napkins, bandages and the like. The material contains a plurality of peaks across its surface at spaced-apart intervals separated by channels. Disposed within the peaks is a liquid absorbing material capable of absorbing body exudates and liquids in general. Due to the materials and the nature of the construction of the present invention, when used as a liner material for personal care absorbent articles such as diapers, it tends to reduce the total surface area in contact with the infant'"'"'s skin and it also provides a plurality of air channels within the diaper from the front waistband to the back waistband of the diaper thereby providing a path for increased air circulation. The material of the present invention has other uses as, for example, a packing or liner material for packaging and shipping materials containing liquids. In addition, the peaks can contain other additive such as soaps so the material can be used as a wash pad or cloth.

Claims

1. A liquid absorbing liner material comprising:

a facing layer and a support layer, said facing layer and said support layer being liquid permeable, said facing layer being joined to said support layer by a plurality of spaced-apart bonds, said facing layer and support layer within pairs of said bonds forming peaks, said peaks being spaced from one another by channels, and

a liquid absorbing material disposed within said peaks for receiving liquids.

2. A personal care absorbent article comprising:

a liner material and a backsheet with an absorbent core disposed therebetween said liner material comprising a facing layer and a support layer, said facing layer being joined to said support layer by a plurality of spaced-apart bonds, said facing layer and support layer within pairs of said bonds forming peaks, said peaks being spaced from one another by channels, and

a liquid absorbing material disposed within said peaks for receiving body exudates.

3. The personal care absorbent article of claim 2 wherein at least one of said peaks further contains a superabsorbent material.

4. The personal care absorbent article of claim 2 wherein at least one of said peaks further contains an odor reducing agent.

5. The personal care absorbent article of claim 2 wherein said facing layer is made from a fibrous nonwoven web.

6. The personal care absorbent article of claim 5 wherein said fibrous nonwoven web includes bicomponent fibers.

7. The personal care absorbent article of claim 5 wherein said liquid absorbing material disposed within said peaks is a fibrous nonwoven web.

8. The personal care absorbent article of claim 7 wherein said fibrous nonwoven web contained within said peaks has opposing first and second exterior surfaces and a plurality of pores dispersed within said web, said web defining a pore size gradient from said first exterior surface to said second exterior surface, said pores adjacent said first exterior surface being larger than said pores adjacent said second exterior surface.

9. The personal care absorbent article of claim 8 wherein said fibrous nonwoven web within said peaks is folded over on itself such that said second exterior surface contacts itself.

10. The personal care absorbent article of claim 7 wherein said fibrous nonwoven web contained within said peaks is made from a blend including polyethylene sheath/polyester core bicomponent fibers, rayon fibers and polyester fibers.

11. The personal care absorbent article of claim 2 wherein said liquid absorbing material contacts said support layer.

12. The personal care absorbent article of claim 2 wherein said liner material is separated from said absorbent core by a separation layer of fibrous nonwoven web material.

13. The personal care absorbent article of claim 12 wherein said separation layer is joined to said backsheet along a left side edge and a right side edge with said absorbent core disposed between said backsheet and said separation layer.

14. The personal care absorbent article of claim 13 wherein said liner material is attached to said separation layer on a side of said separation layer opposed from said absorbent core, said separation layer further including leg dams extending upwardly from a same side of said separation layer as said liner material, said leg dams and said left and right side edges defining zones between said leg dams and said left and right sides respectively which are essentially devoid of said liner material.

15. The personal care absorbent article of claim 14 wherein said backsheet is breathable.

16. The personal care article of claim 2 wherein said article defines a front edge, a back edge, a left side edge and a right side edge, said liner material further defining a front portion adjacent said front edge and a back portion adjacent said back edge, said front portion and said back portion being separated by a central portion, said central portion being devoid of said peaks.

17. A liquid absorbent liner material comprising:

a facing layer containing a plurality of pairs of first and second folds, each of said first and second folds forming respective first and second fold lines, said facing layer being joined to itself generally along said first and second fold lines to form a plurality of spaced-apart peaks, said peaks being spaced from one another by channels, and

a liquid absorbing material disposed within said peaks for receiving liquids.

18. A personal care absorbent article comprising:

a liner material and a backsheet with an absorbent core disposed therebetween, said liner material comprising a facing layer containing a plurality of pairs of first and second folds, each of said first and second folds forming respective first and second fold lines, said facing layer being joined to itself generally along said first and second fold lines to form a plurality of spaced-apart peaks, said peaks being spaced from one another by channels, and

a liquid absorbing material disposed within said peaks for receiving body exudates.

19. The personal care absorbent article of claim 18 wherein at least one of said peaks further contains a superabsorbent material.

20. The personal care absorbent article of claim 18 wherein at least one of said peaks further contains an odor reducing agent.

21. The personal care absorbent article of claim 18 wherein said facing layer is made from a fibrous nonwoven web.

22. The personal care absorbent article of claim 21 wherein said fibrous nonwoven web includes bicomponent fibers.

23. The personal care absorbent article of claim 21 wherein said liquid absorbing material disposed within said peaks is a fibrous nonwoven web.

24. The personal care absorbent article of claim 23 wherein said fibrous nonwoven web contained within said peaks has opposing first and second exterior surfaces and a plurality of pores dispersed within said web, said web defining a pore size gradient from said first exterior surface to said second exterior surface, said pores adjacent said first exterior surface being larger than said pores adjacent said second exterior surface.

25. The personal care absorbent article of claim 24 wherein said fibrous nonwoven web within said peaks is folded over on itself such that said second exterior surface contacts itself.

26. The personal care absorbent article of claim 18 wherein said liner material is separated from said absorbent core by a separation layer of fibrous nonwoven web material.

27. The personal care absorbent article of claim 26 wherein said separation layer is joined to said backsheet along a left side edge and a right side edge with said absorbent core disposed between said backsheet and said separation layer.

28. The personal care absorbent article of claim 27 wherein said liner material is attached to said separation layer on a side of said separation layer opposed from said absorbent core, said separation layer further including leg dams extending upwardly from a same side of said separation layer as said liner material, said leg dams and said left and right side edges defining zones between said leg dams and said left and right sides respectively which are essentially devoid of said liner material.

29. The personal care absorbent article of claim 28 wherein said backsheet is breathable.

30. A personal care absorbent article comprising:

a liner material and a backsheet joined to said liner material, said liner material comprising a facing layer and a support layer, said facing layer being joined to said support layer by a plurality of spaced-apart bonds, said facing layer and support layer within pairs of said bonds forming peaks, said peaks being spaced from one another by channels, and

a liquid absorbing material disposed within said peaks for receiving body exudates.

31. The personal care absorbent article of claim 30 wherein said backsheet is breathable.

32. The personal care absorbent article of claim 31 wherein said liner material forming said channels is in contact with said breathable backsheet.

33. The personal care absorbent article of claim 30 wherein said article defines a front edge, a back edge, a left side edge and a right side edge, said liner material having a dam extending across said liner material in a direction generally parallel to at least one of said front edge and said back edge.

34. The personal care article of claim 33 wherein said dam is formed by a fold in said liner material.

35. The personal care absorbent article of claim 30 wherein said facing layer further defines a plurality of apertures extending through said facing layer.

36. The personal care absorbent article of claim 30 wherein said article defines a front edge and a back edge, a left side edge and a right side edge, said peaks having closed ends adjacent said front edge and said back edge.

37. A personal care absorbent article comprising:

a liner material and a backsheet joined to said liner material, said liner material comprising a facing layer containing a plurality of pairs of first and second folds, each of said first and second folds forming respective first and second fold lines, said facing layer being joined to itself generally along said first and second fold lines to form a plurality of spaced-apart peaks separated by channels, and

a liquid absorbing material disposed within said peaks for receiving body exudates.

38. The personal care absorbent article of claim 37 wherein said backsheet is breathable.

39. A personal care absorbent article comprising:

a liner material and a backsheet with an absorbent core disposed therebetween, said liner material comprising a facing layer with a plurality of liquid absorbent peaks attached at spaced-apart intervals to a surface of said facing layer opposed to said backsheet and absorbent core.

40. A personal care absorbent article comprising:

a liner material and a backsheet joined to said liner material, said liner material comprising a facing layer with a plurality of liquid absorbent peaks attached at spacedapart intervals to a surface of said facing layer opposed to said backsheet.

41. The personal care absorbent article of claim 40 wherein said backsheet is breathable.

42. A personal care absorbent article comprising a liner material and a backsheet,

said liner material comprising a plurality of peaks on its surface opposed to said backsheet at spaced-apart intervals separated by channels, said liner material being joined to said backsheet along a left side edge and a right side edge;

a liquid absorbing material disposed within said peaks for receiving body exudates; and

leg dams interior to said left and right side edges.

43. The personal care absorbent article of claim 42 wherein said channels extend to the longitudinal ends of the article and permit air flow along the length of the liner material in use.

44. The personal care absorbent article of claim 42, further comprising:

an absorbent core disposed between said liner material and backsheet, and wherein said liner material comprises a facing layer and a support layer, said facing layer being joined to said support layer by a plurality of spaced-apart bonds, said facing layer and said support layer between pairs of bonds forming said peaks.

45. The personal care absorbent article of claim 42, further comprising:

an absorbent core disposed between said liner material and backsheet, and wherein said liner material comprises a facing layer containing a plurality of pairs of first and second folds, each of said first and second folds forming respective first and second fold lines, said facing layer being joined to itself generally along said first and second fold lines to form said plurality of spaced-apart peaks.

46. The personal care absorbent article of claim 42, further comprising:

an absorbent core disposed between said liner material and backsheet and wherein said liner material comprises a facing layer with a plurality of liquid absorbent peaks attached at spaced-apart intervals to the surface of said facing layer opposed to said backsheet and absorbent core.

47. The personal care absorbent article of claim 44 wherein said liner material is separated from said absorbent core by a separation layer of fibrous nonwoven web material.

48. The personal care absorbent article of claim 47 wherein said separation layer is joined to said backsheet along a left side edge and a right side edge with said absorbent core disposed between said backsheet and said separation layer.

49. The personal care absorbent article of claim 48 wherein said liner material is attached to said separation layer on a side of said separation layer opposed from said absorbent core, said separation layer further including said leg dams extending upwardly from a same side of said separation layer as said liner material, said leg dams and said left and right side edges defining zones between said leg dams and said left and right sides respectively which are essentially devoid of said liner material.

50. The personal care absorbent article of claim 42 wherein said liner material comprises a facing layer and a support layer, said facing layer being joined to said support layer by a plurality of spaced-apart bonds, said facing layer and said support layer between pairs of bonds forming said peaks.

51. The personal care absorbent article of claim 42 wherein said liner material comprises a facing layer containing a plurality of pairs of first and second folds, each of said first and second folds forming respective first and second fold lines, said facing layer being joined to itself generally along said first and second fold lines to form said plurality of spaced-apart peaks separated by channels.

52. The personal care absorbent article of claim 42 wherein said liner material comprises a facing layer with a plurality of liquid absorbent peaks attached at spacedapart intervals to a surface of said facing layer opposed to said backsheet.

53. The personal care absorbent article of claim 42 wherein said backsheet is breathable.

54. The personal care absorbent article of claim 42 wherein at least one of said peaks further contains a superabsorbent material.

55. The personal care absorbent article of claim 42 wherein at least one of said peaks further contains an odor reducing agent.

56. The personal care absorbent article of claim 42 wherein said liquid absorbing material disposed within said peaks is a fibrous nonwoven web.

57. The personal care absorbent article of claim 56, wherein said fibrous nonwoven web contained within said peaks has opposing first and second exterior surfaces and a plurality of pores dispersed within said web, said web defining a pore size gradient from said first exterior surface to said second exterior surface, said pores adjacent said first exterior surface being larger than said pores adjacent said second exterior surface.

58. The personal care absorbent article of claim 57, wherein said fibrous nonwoven web within said peaks is folded over on itself such that said second exterior surface contacts itself.

59. The personal care article of claim 42 wherein said article defines a front edge, a back edge, a left side edge and a right side edge, said liner material further defining a front portion adjacent said front edge and a back portion adjacent said back edge, said front portion and said back portion being separated by a central portion, said central portion being devoid of said peaks.

60. The personal care absorbent article of claim 42 wherein said article defines a front edge, a back edge, a left side edge and a right said edge, said liner material having a dam extending across said liner material in a direction generally parallel to at least one of said front edge and said back edge.