Light incontinent product

• US 6,506,961 B1
• Filed: 07/24/2000
• Issued: 01/14/2003
• Est. Priority Date: 07/24/2000
• Status: Expired due to Term

• Current Assignee: First Quality Retail Services LLC (First Quality Products LLC)
• Original Assignee: Tyco Healthcare Retail Services Ag (Medtronic Plc)
• Inventors: Levy, Ruth
• Primary Examiner(s): Ruhl, Dennis
• Assistant Examiner(s): Webb, Jamisue A.
• Application Number:
  US09/624,088
• Time in Patent Office: 904 Days
• Field of Search: 604/378, 604/379, 604/380, 604/385.01, 604/385.21, 604/385.23, 604/385.101
• US Class Current: 604/380
• CPC Class Codes: A61F 13/4756 the means consisting of grooves, e.g. channels, depressions or embossments, resulting in a heterogeneous surface level
• CPC Class Codes: A61F 13/4758 the means preventing fluid flow in a longitudinal direction

Abstract

A disposable absorbent article, e.g., a pantiliner, or other absorbent pad. The pad is an elongated generally planar member having a general hour-glass shape periphery including a pair of concave, side sections interconnecting respective ones of a pair of convex end sections. The pad basically comprises a top-sheet, a fluid absorbent core, and a cover sheet. The top sheet is formed of a fluid pervious material, e.g., a non-woven material, and is disposed over the absorbent core. The absorbent core comprises a fluid absorbing material, e.g., cellulosic fluff and super-absorbent particles, and is disposed over the cover sheet. The cover sheet is formed of a fluid impervious material, e.g., a plastic film. The top-sheet, the fluid absorbent core and the cover sheet are bonded, e.g., thermally bonded, together along plural concentric lines located adjacent the periphery of the pad. The plural concentric lines form a barrier resistant to the egress of fluid out of the periphery of the pad. The concentric lines include gaps therein to facilitate the bending of the pad. The gaps can be located at specific locations in the pad, e.g., between respective ones of adjacent end and side sections, or along the entire length of each of the concentric lines. Moreover, the gaps of one line can be aligned with the gaps of the other lines or the gaps can be staggered.

Claims

1. A disposable absorbent pad arranged to be worn by a wearer to trap and collect fluid waste products of the wearer, said pad being an elongated generally planar member having a periphery including a top edge, a bottom edge and a pair of longitudinal extending side edges, said top edge extending generally transversely, said top edge terminating in a pair of top end portions, said bottom edge extending generally transversely, said bottom edge terminating in a pair of bottom end portions, one of said longitudinally extending side edges interconnecting one top end portion and one bottom end portion, the other of said longitudinally extending side edges interconnecting the other top end portion and the other bottom end portion, said pad comprising a top-sheet, a fluid absorbent core, and a cover sheet, said top sheet being formed of a fluid pervious material and being disposed over said absorbent core, said absorbent core comprising a fluid absorbing material and being disposed over said cover sheet, said cover sheet being formed of a fluid impervious material, said top-sheet, said fluid absorbent core and said cover sheet being bonded together along plural concentric lines, portions of said plural concentric lines being located adjacent said sides and portions of said plural concentric lines being located adjacent said top and bottom edges, said plural concentric lines forming a barrier resistant to the egress of fluid out of the periphery of said pad, each of said plural concentric lines including at least one elongate line segment and at least one gap, said at least one elongate line segment having a length extending along a longitudinal axis and a width extending along a transverse axis, said length of said at least one elongate line segment being substantially larger than said width of said at least one elongate line segment said at least one gap serving to enhance the flexibility of said pad at the location of said at least one gap.

2. The pad of claim 1 wherein said periphery of said pad is of a generally hour-glass shape.

3. The pad claim 1 wherein each of said concentric lines is concentric with the periphery of said pad.

4. The pad of claim 1 wherein said top sheet is selected from the group consisting of spun bonded or carded web non-woven materials or apertured three dimensional plastic film.

5. The pad of claim 1 wherein said fluid absorbent core comprises cellulosic fibers.

6. The pad of claim 5 wherein said fluid absorbent core additionally comprises absorption enhancing materials.

7. The pad of claim 1 wherein said cover sheet is formed of a plastic material.

8. The pad of claim 7 wherein said plastic material is selected from the group consisting of polypropylene, polyester, polyethylene, and blends thereof.

9. The pad of claim 1 wherein each of the concentric lines includes a pair of opposed convex arcuate line end sections and a pair of opposed side sections, one of said pair of convex arcuate line end sections being located adjacent one of said pair of ends of said pad, the other of said pair of convex arcuate line end sections being located adjacent the other of said pair of ends of said pad, one of said pair of side sections being located adjacent one of said pair of longitudinally extending sides and the other of said pair of side sections being located adjacent the other of said pair of longitudinally extending sides.

10. The pad of claim 9 wherein said side sections of said concentric lines include a multitude of gaps extending therealong.

11. The pad of claim 9 wherein said side sections of said concentric lines include a multitude of gaps extending therealong and wherein said end sections of said concentric lines include a multitude of gaps extending therealong.

12. The pad of claim 11 wherein the gaps of each of said lines are staggered.

13. The pad of claim 11 wherein the gaps of each of said lines are aligned.

14. The pad of claim 9 wherein each of said concentric lines includes four gaps, with each of said gaps being located between a respective side section and end section.

15. The pad of claim 14 wherein the gaps of each of said lines are aligned.

16. The pad of claim 14 wherein the gaps of each of said lines are staggered.

17. The pad of claim 9 wherein said concentric lines of said end sections includes a multitude of gaps extending therealong.

18. The pad of claim 17 wherein the gaps of each of said lines are aligned.

19. The pad of claim 17 wherein the gaps of each of said lines are staggered.

20. A method of making a disposable absorbent article arranged to be worn by a wearer to trap and collect fluid waste products of the wearer, said method comprising the steps of:

(A) providing a pad having a periphery including a top edge, a bottom edge and a pair of longitudinal extending side edges, said top edge extending generally transversely, said top edge terminating in a pair of top end portions, said bottom edge extending generally transversely, said bottom edge terminating in a pair of bottom end portions, one of said longitudinally extending side edges interconnecting one top end portion and one bottom end portion, the other of said longitudinally extending side edges interconnecting the other top end portion and the other bottom end portion, said pad comprising a top-sheet, a fluid absorbent core, and a cover sheet, said top sheet being formed of a fluid pervious material and disposed over said absorbent core, said absorbent core comprising a fluid absorbing material and being disposed over said cover sheet, and said cover sheet being formed of a fluid impervious material; and

(B) bonding said top-sheet, said fluid absorbent core, and said cover sheet together along plural concentric lines located adjacent said sides and said top and bottom edges to form a barrier resistant to the egress of fluid through said lines and out of the periphery of said pad, each of said plural concentric lines including at least one elongate[d] line segment and at least one gap, said at least one elongate line segment having a length extending along a longitudinal axis and a width extending along a transverse axis, said length of said at least one elongate line segment being substantially larger than said width of said at least one elongate line segment said at least one gap serving to enhance the flexibility of said pad at the location of said at least one gap.

21. The method of claim 20 wherein said periphery of said pad is generally hour-glass shaped.

22. The method of claim 20 wherein each of said concentric lines is concentric with the periphery of said pad.

23. The method of claim 20 wherein said top sheet is selected from the group consisting of spun bonded or carded web non-woven materials or apertured three dimensional plastic film.

24. The method of claim 20 wherein said fluid absorbent core comprises cellulosic fibers.

25. The method of claim 20 wherein said fluid absorbent core additionally comprises absorption enhancing materials.

26. The method of claim 20 wherein said concentric lines are produced by the application of pressure to compress the material of said top-sheet, said fluid absorbent core and said cover sheet together, whereupon each of said lines is resistant to the passage of fluid therethrough.

27. The method of claim 26 wherein said concentric lines are produced by thermally bonding said top-sheet, said fluid absorbent core and a cover sheet together.

28. The method of claim 20 wherein said cover sheet is formed of a plastic material.

29. The method of claim 28 wherein said plastic material is selected from the group consisting of polypropylene, polyester, polyethylene, and blends thereof.

30. The method of claim 20 wherein each of the concentric lines includes a pair of opposed convex arcuate line end sections and a pair of opposed side sections, one of said pair of convex arcuate line end sections being located adjacent one of said pair of ends of said pad, the other of said pair of convex arcuate line end sections being located adjacent the other of said pair of ends of said pad, one of said pair of side sections being located adjacent one of said pair of longitudinally extending sides and the other of said pair of side sections being located adjacent the other of said pair of longitudinally extending sides.

31. The method of claim 30 wherein said side sections of said concentric lines include a multitude of gaps extending therealong and wherein said end sections of said concentric lines include a multitude of gaps extending therealong.

32. The method of claim 31 wherein the gaps of each of said lines are aligned.

33. The method of claim 31 wherein the gaps of each of said lines are staggered.

34. The method of claim 30 wherein said concentric lines of said end sections includes a multitude of gaps extending therealong.

35. The method of claim 34 wherein the gaps of each of said lines are aligned.

36. The method of claim 34 wherein the gaps of each of said lines are staggered.

37. The method of claim 35 wherein each of said concentric lines includes four gaps, with each of said gaps being located between a respective side section and end section.

38. The method of claim 30 wherein said side sections of said concentric lines include a multitude of gaps extending therealong.

39. The method of claim 38 wherein the gaps of each of said lines are aligned.

40. The method of claim 38 wherein the gaps of each of said lines are staggered.