Absorbent article containing extensible zones

• US 5,846,232 A
• Filed: 12/20/1995
• Issued: 12/08/1998
• Est. Priority Date: 12/20/1995
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Uitenbroek, Duane Girard, Serbiak, Paul John
• Primary Examiner(s): Polutta, Mark O.
• Application Number:
  US08/575,310
• Time in Patent Office: 1,084 Days
• Field of Search: 604/385.1, 604/385.2, 604/373, 604/372, 604/386, 604/387
• US Class Current: 604/385.29
• CPC Class Codes: A61F 13/49009 with elastic means
• CPC Class Codes: A61F 2013/49022 being elastomeric sheet
• CPC Class Codes: A61F 2013/49025 having multiple elastic strands
• CPC Class Codes: A61F 2013/49053 being stretchable in the longitudinal direction or machine direction, i.e. longitudinal
• CPC Class Codes: A61F 2013/49055 being stretchable in transversal direction or cross machine direction
• CPC Class Codes: A61F 2013/49057 being stretchable in both longitudinal and transversal direction
• CPC Class Codes: A61F 2013/51322 being elastomeric or stretchable
• CPC Class Codes: A61F 2013/51327 in only one specific direction
• CPC Class Codes: A61F 2013/51429 being elastomeric or stretchable sheet
• CPC Class Codes: A61F 2013/51452 being nonwovens

Abstract

An absorbent article includes extensible zones. These extensible zones enable the absorbent article to expand and fit a broad size range of users. The extensible zones enable a broad range of adjustment in waist and leg opening dimensions by extension and retraction of the extensible zones. The bodyside liner layer and the outer cover layer preferably comprise spunbonded layers stretched in one direction and correspondingly narrowed in another direction. The extensible zones typically include an elastic layer between, and mounted to extend with, the outer cover layer and the bodyside liner layer. The elastic layer can comprise an elastic film or strands of material. An absorbent core is located between the bodyside liner layer and the outer cover layer. A method for forming an absorbent article is also disclosed which includes the step of forming a base structure by attaching the extensible bodyside liner layer to an extensible outer cover layer and creating at least one extensible zone by incorporating the elastic layer between the outer cover layer and the bodyside liner layer. In another embodiment of the invention, a plurality of extensible zones are formed with plural elastic layer elements. In another embodiment of the invention, the outer cover layer is formed by a nonextensible layer which is gathered and attached to the elastic layer and the bodyside liner layer. In yet another embodiment of the invention, the extensible zones are formed by the outer cover layer and bodyside liner layer with no elastic layer present.

Claims

1. An absorbent article having a front portion, a rear portion, and a crotch portion connecting said front and rear portions, and a first outer perimeter, said front portion, said rear portion, and said crotch portion, in combination, defining an overall area of said absorbent article, a longitudinal axis extending through said front, rear and crotch portions and defining a first direction in said absorbent article aligned substantially with said longitudinal axis and a respective second cross direction, said absorbent article comprising:

(a) an outer cover layer formed by a first material extensible in at least one of the first direction and the second cross direction;

(b) a bodyside liner layer formed by a second material extensible in at least one of the first direction and the second cross direction, said bodyside liner layer and said outer cover layer being secured to said absorbent article, and forming, in combination, a base structure;

(c) at least one elastic layer having a second outer perimeter, said elastic layer being located between said outer cover layer and said bodyside liner layer, and attached to at least one of said outer cover layer and said bodyside liner layer, wherein said outer cover layer, said bodyside liner layer, and said elastic layer can simultaneously coexist in a substantially fully extended unstressed condition;

(d) an absorbent secured to said absorbent article; and

(e) at least one extensible zone, defined within the second outer perimeter of said at least one elastic layer and comprehending coextensive portions of said bodyside liner layer and said outer cover layer,

said at least one extensible zone allowing a broad range of extensibility of said absorbent article within said at least one extensible zone by extension and retraction of said absorbent article in said at least one extensible zone.

2. An absorbent article of claim 1, further comprising an attachment element located in said rear portion of said absorbent article, said attachment element cooperating in securing said absorbent article upon a user, said attachment element extending outwardly from respective edges of said rear portion of said absorbent article, said at least one extensible zone being located in said rear portion of said absorbent article adjacent to and extending inwardly from said attachment element.

3. An absorbent article of claim 1, said absorbent including a nonextensible absorbent core between said bodyside liner layer and said elastic layer, said base structure being effectively fixedly attached to said absorbent core over an area of said base structure whereby said base structure is not extensible over the respective area of said base structure controlled by the attachment between said absorbent core and said base structure.

4. An absorbent article of claim 1 wherein said second extensible material of said bodyside liner layer comprises a spunbonded layer stretched in one of the first direction and the second cross direction by about 5% to about 75%, and correspondingly narrowed in the other of the first direction and the second cross direction.

5. An absorbent article of claim 1 wherein said first extensible material of said outer cover layer comprises a spunbonded layer stretched in one of the first direction and the second cross direction by about 5% to about 75%, and correspondingly narrowed in the other of the first direction and the second cross direction.

6. An absorbent article of claim 1 wherein said first extensible material of said outer cover layer is selected from one or more of the group consisting of a spunbonded material, a spunbonded laminate material, and a bonded carded web.

7. An absorbent article of claim 1 wherein both of said first and second extensible materials, of both said bodyside liner layer and said outer cover layer, have been narrowed in the second cross direction, by stretching in the first direction and corresponding necking in the second cross direction, said at least one extensible zone being extensible in the second cross direction.

8. An absorbent article of claim 7 wherein both said bodyside liner layer and said outer cover layer are creped such that the creping is extensible in the first direction, such that said absorbent article is extensible in said at least one extensible zone in both the first direction and the second cross direction.

9. An absorbent article of claim 1 wherein said absorbent article is extensible, in said at least one extensible zone, in the second cross direction.

10. An absorbent article of claim 1 wherein said elastic layer is disposed only in common with the respective said at least one extensible zone.

11. An absorbent article of claim 1 wherein said elastic layer comprises a sheet of elastic material.

12. An absorbent article of claim 1 wherein said absorbent comprises an absorbent core and said base structure is effectively attached to said absorbent core over an area of said base structure whereby said base structure is not extensible over the respective area of said base structure controlled by the attachment between said absorbent core and said base structure, the remainder of said base structure being extensible and comprising said at least one extensible zone.

13. An absorbent article of claim 1, including an attachment element mounted to said rear portion of said absorbent article, and securing said absorbent article to a user by securement of said attachment element to said front portion, said absorbent comprising an absorbent core, and said base structure being attached to said absorbent core and attached to a nonextensible layer element in a region of said front portion of said absorbent article adjacent securement of said attachment element to said front portion of said absorbent article.

14. An absorbent article of claim 13, said at least one extensible zone comprising first and second extensible zones, said attachment element comprising a first attachment element, and a second attachment element, said respective first and second attachment elements being disposed on opposing sides of said rear portion and adjacent said first and second extensible zones, said rear portion of said absorbent article including a second elastic layer in said second extensible zone, said first and second elastic layers being disposed between respective ones of said attachment elements and said absorbent core.

15. An absorbent article of claim 1, said absorbent article comprising a respective said extensible zone in said rear portion and in said crotch portion, said base structure thereby having extensible properties in said rear portion, and in said crotch portion adjacent said rear portion and extending to a narrowest part of said crotch portion, said absorbent comprising an absorbent core disposed between said outer cover layer and said bodyside liner layer and extending from within said front portion, through said crotch portion to within said rear portion, said absorbent core being free from fixed attachment to said base structure over a substantial area of said rear portion of said absorbent article, coextensive with said absorbent core, whereby said base structure is extensible in said rear portion independent of said absorbent core.

16. An absorbent article of claim 15, including a respective said extensible zone in said front portion of said absorbent article, said second extensible zone extending from a central region across a front edge of said front portion inwardly into said front portion.

17. An absorbent article of claim 1 wherein said base structure is extensible in respective said extensible zones on opposing sides of said absorbent article in said front portion and said rear portion of said absorbent article, said absorbent article not being extensible in a central region of said absorbent article extending along the longitudinal axis and having a width narrower than a minimum width of said absorbent article.

18. An absorbent article of claim 1 wherein said base structure is extensible in a respective said central extensible zone extending along the longitudinal axis and having a width narrower than a minimum width of said absorbent article, said absorbent including an absorbent core received between said outer cover layer and said bodyside liner layer, in said front portion, said crotch portion and said rear portion of said absorbent article, said absorbent core being without effective securement to either of said outer cover layer or said bodyside liner layer about said central extensible zone.

19. An absorbent article of claim 1 wherein said base structure is extensible in a respective said extensible zone comprising said crotch portion of said absorbent article.

20. An absorbent article of claim 19, said crotch portion including leg elastics spaced outwardly from said longitudinal axis, wherein said leg elastics can coexist simultaneously with said base structure in substantially fully extended unstressed condition, said leg elastics extending when said base structure is extended in said extensible zone in the first direction.

21. An absorbent article of claim 1 wherein said elastic layer extends between said outer cover layer and said bodyside liner layer over the overall area defined by said absorbent article.

22. An absorbent article of claim 21 wherein at least one substantially nonextensible layer element is attached to said base structure in at least one region outside respective said at least one extensible zone.

41. An absorbent article of claim 1 wherein said absorbent article is free from leg elastics.

42. An absorbent article of claim 1 wherein said absorbent article is free from waist elastics.

43. An absorbent article of claim 1 wherein said elastic layer comprises a thermoplastic film.

23. An absorbent article having a front portion, a rear portion, a crotch portion connecting said front and rear portions, and a longitudinal axis extending through said front, rear and crotch portions and defining a first direction of said absorbent article aligned with said longitudinal axis and a respective second cross direction, said absorbent article comprising:

(a) an outer cover layer formed by a first material extensible in at least one of the first direction and the second cross direction;

(b) a bodyside liner layer formed by a second material extensible in at least one of the first direction and the second cross direction, said bodyside liner layer and said outer cover layer being secured to said absorbent article, and forming, in combination, a base structure;

(c) an absorbent core disposed between said outer cover layer and said bodyside liner layer,

(d) at least one elastic layer comprising a sheet or film of elastic material having a second outer perimeter, said elastic layer being located between said outer cover layer and said bodyside liner layer, and attached to at least one of said outer cover layer and said bodyside liner layer, wherein said outer cover layer, said bodyside liner layer, and said elastic layer can simultaneously coexist in a substantially fully extended unstressed condition; and

(e) at least one extensible zone, comprehending coextensive portions of at least said bodyside liner layer and said outer cover layer,

said at least one extensible zone allowing a broad range of extensibility of said absorbent article within said at least one extensible zone by extension of said absorbent article in said at least one extension zone beyond a length or a width of said absorbent article in the substantially fully extended unstressed condition.

24. An absorbent article of claim 23 wherein said at least one extensible zone is formed by said bodyside liner layer and said outer cover layer, said absorbent article being retractable in said at least one extensible zone from about 5% to about 70% of a distance said base structure is extended.

25. An absorbent article of claim 23 wherein said at least one extensible zone further includes said elastic layer, said absorbent article being retractable in said at least one extensible zone from about 70% to about 100% of a distance said base structure is extended.

26. An absorbent article of claim 23 wherein said at least one extensible zone comprises a plurality of extensible zones, at least a first one of said extensible zones including said elastic layer, and at least a second one of said extensible zones being devoid of an elastic layer.

27. An absorbent article of claim 23 wherein said first extensible material of said outer cover is selected from one or more of the group consisting of a spunbonded material, a spunbonded laminate material, and a bonded carded web.

28. An absorbent article of claim 23 wherein both of said first and second extensible materials, of both said bodyside liner layer and said outer cover layer, have been narrowed in the second cross direction, by stretching in the first direction and corresponding necking in the second cross direction, said at least one extensible zone being extensible in the second cross direction.

29. An absorbent article of claim 28 wherein both said bodyside liner layer and said outer cover layer are creped such that the creping is extensible in the first direction, and wherein said absorbent article is extensible in said at least one extensible zone in both the first direction and the second cross direction.

30. An absorbent article of claim 23 wherein said absorbent article in said at least one extensible zone is extensible in the second cross direction.

31. An absorbent article of claim 23 wherein said base structure is effectively attached to said absorbent core, whereby said base structure is not extensible over an area of said base structure controlled by the attachment between said absorbent core and said base structure, the remainder of said base structure being extensible and comprising said at least one extensible zone.

32. An absorbent article of claim 23, including an attachment element mounted to said rear portion of said absorbent article, and securing said absorbent article to a user by securement of said attachment element to said front portion, said base structure being attached to said absorbent core and attached to a nonextensible layer element in a region of said front portion of said absorbent article adjacent securement of said attachment element to said front portion of said absorbent article.

33. An absorbent article of claim 23, said absorbent article comprising a respective said extensible zone in said rear portion and in said crotch portion, said base structure thereby having extensible properties in said rear portion, and in said crotch portion adjacent said rear portion and extending to a narrowest part of said crotch portion, said absorbent core extending from within said front portion, through said crotch portion, to within said rear portion, said absorbent core being free from fixed attachment to said base structure over a substantial area of said rear portion of said absorbent article, coextensive with said absorbent core, whereby said base structure is extensible in said rear portion independent of said absorbent core.

34. An absorbent article of claim 33, including a respective said second extensible zone in said front portion of said absorbent article, said second extensible zone extending from a central region across a front edge of said front portion inwardly into said front portion.

35. An absorbent article of claim 23 wherein said base structure is extensible in respective said extensible zones on opposing sides of said absorbent article in said front portion and said rear portion of said absorbent article, said absorbent article not being extensible in a central region of said absorbent article extending along the longitudinal axis and having a width narrower than a minimum width of said absorbent article.

36. An absorbent article of claim 23 wherein said base structure is extensible in a respective said central extensible zone extending along the longitudinal axis and having a width narrower than a minimum width of said absorbent article, said absorbent core being without effective securement to either of said outer cover layer or said bodyside liner layer about said central extensible zone.

37. An absorbent article of claim 23 wherein said base structure is extensible in a respective said extensible zone comprising said crotch portion of said absorbent article.

39. An absorbent article of claim 23 wherein said absorbent article is free from leg elastics.

40. An absorbent article of claim 23 wherein said absorbent article is free from waist elastics.

38. An absorbent article of claim 70, said crotch portion including leg elastics spaced outwardly from said longitudinal axis, wherein said leg elastics can coexist simultaneously with said base structure in substantially fully extended unstressed condition, said leg elastics extending when said base structure is extended in said extensible zone in the first direction, said leg elastics being generally unstressed when attached to said crotch portion of said absorbent article and stressed when said absorbent article is applied to a user.

44. An absorbent article having a front portion, a rear portion, a crotch portion connecting said front and rear portions, and a longitudinal axis extending through said front, rear and crotch portions and defining a first direction of said absorbent article aligned with said longitudinal axis and a respective second cross direction, said absorbent article comprising:

(a) an outer cover layer formed by a first material extensible in at least one of the first direction and the second cross direction;

(b) a bodyside liner layer formed by a second material extensible in at least one of the first direction and the second cross direction, said bodyside liner layer and said outer cover layer being secured to said absorbent article, and forming, in combination, a base structure;

(c) an absorbent core disposed between said outer cover layer and said bodyside liner layer,

(d) at least one elastic layer having a second outer perimeter, said elastic layer being located between said outer cover layer and said bodyside liner layer, and attached to at least one of said outer cover layer and said bodyside liner layer, wherein said outer cover layer, said bodyside liner layer, and said elastic layer can simultaneously coexist in a substantially fully extended unstressed condition; and

(e) at least one extensible zone, comprehending coextensive portions of at least said bodyside liner layer and said outer cover layer,

said absorbent article being free from leg elastics, said at least one extensible zone allowing a broad range of extensibility of said absorbent article within said at least one extensible zone by extension of said absorbent article in said at least one extension zone beyond a length or a width of said absorbent article in the substantially fully extended unstressed condition.

45. An absorbent article of claim 44, said elastic layer comprising a sheet of elastic material.

46. An absorbent article of claim 44, said elastic layer comprising a thermoplastic film.

47. An absorbent article of claim 44, further comprising an attachment element located in said rear portion of said absorbent article, said attachment element cooperating in securing said absorbent article upon a user, said attachment element extending outwardly from respective edges of said rear portion of said absorbent article, said at least one extensible zone being located in said rear portion of said absorbent article adjacent to and extending inwardly from said attachment element.

48. An absorbent article of claim 44, said absorbent core being nonextensible, said base structure being effectively fixedly attached to said absorbent core over an area of said base structure whereby said base structure is not extensible over the respective area of said base structure controlled by the attachment between said absorbent core and said base structure.

49. An absorbent article of claim 44 wherein said absorbent article is extensible, in said at least one extensible zone, in the second cross direction.

50. An absorbent article of claim 44 wherein said elastic layer is disposed only in common with the respective said at least one extensible zone.

51. An absorbent article of claim 44, including an attachment element mounted to said rear portion of said absorbent article, and securing said absorbent article to a user by securement of said attachment element to said front portion, said base structure being attached to said absorbent core and attached to a nonextensible layer element in a region of said front portion of said absorbent article adjacent securement of said attachment element to said front portion of said absorbent article.

52. An absorbent article of claim 51, said at least one extensible zone comprising first and second extensible zones, said attachment element comprising a first attachment element, and a second attachment element, said respective first and second attachment elements being disposed on opposing sides of said rear portion and adjacent said first and second extensible zones, said rear portion of said absorbent article including a second elastic layer in said second extensible zone, said first and second elastic layers being disposed between respective ones of said attachment elements and said absorbent core.

53. An absorbent article of claim 44, said absorbent article comprising a respective said extensible zone in said rear portion and in said crotch portion, said base structure thereby having extensible properties in said rear portion, and in said crotch portion adjacent said rear portion and extending to a narrowest part of said crotch portion, said absorbent core being free from fixed attachment to said base structure over a substantial area of said rear portion of said absorbent article, coextensive with said absorbent core, whereby said base structure is extensible in said rear portion independent of said absorbent core.

54. An absorbent article of claim 53, including a respective said extensible zone in said front portion of said absorbent article, said second extensible zone extending from a central region across a front edge of said front portion inwardly into said front portion.

55. An absorbent article of claim 44 wherein said base structure is extensible in respective said extensible zones on opposing sides of said absorbent article in said front portion and said rear portion of said absorbent article, said absorbent article not being extensible in a central region of said absorbent article extending along the longitudinal axis and having a width narrower than a minimum width of said absorbent article.

56. An absorbent article of claim 44 wherein said base structure is extensible in a respective said central extensible zone extending along the longitudinal axis and having a width narrower than a minimum width of said absorbent article, said absorbent core being without effective securement to either of said outer cover layer or said bodyside liner layer about said central extensible zone.

57. An absorbent article of claim 44 wherein said base structure is extensible in a respective said extensible zone comprising said crotch portion of said absorbent article.

58. An absorbent article of claim 44 wherein said elastic layer extends between said outer cover layer and said bodyside liner layer over the overall area defined by said absorbent article.

59. An absorbent article of claim 44 wherein said absorbent article is free from waist elastics.