Transparent/translucent absorbent composites and articles

• US 20070083175A1
• Filed: 10/11/2005
• Published: 04/12/2007
• Est. Priority Date: 10/11/2005
• Status: Abandoned Application

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Soerens, Dave, Wilhelm, Hoa, Van Himbergen, Timothy, Kole, Renee, Rivera, Ligia, Fell, David
• Application Number:
  US11/247,734
• Publication Number:
  US 20070083175A1
• Time in Patent Office: Days
• US Class Current: 604/367
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/531 having a homogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence
• CPC Class Codes: A61F 13/534 having an inhomogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence; homogeneous cores with tissue wrapping A61F13/53
• CPC Class Codes: A61L 15/24 Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 15/42 Use of materials characterised by their function or physical properties liquid bandages A61L26/00
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters

Abstract

The present invention provides a translucent absorbent composite having a substrate with a light transmittance of at least about 60% and an absorbent material applied to the substrate. The absorbent layer contains an absorbent prepared from a water soluble ionic polymer having about 15 to about 99.9% by mass monoethylenically unsaturated polymer units having at least one functional group and about 0.1 to about 20% by mass ester units selected from the group consisting of acrylate and methacrylate ester units having an alkoxysilane functionality, wherein the absorbent composite has a light transmittance of at least 45%. Also provided are absorbent articles containing the absorbent composite.

Claims

1. A translucent absorbent composite comprising a substrate and an absorbent material applied to the substrate, the absorbent material comprises an absorbent prepared from a water soluble ionic polymer comprising about 15 to about 99.9% by mass monoethylenically unsaturated polymer units having at least one functional group, about 0.1 to about 20% by mass ester units selected from the group consisting of acrylate and methacrylate ester units having an alkoxysilane functionality, wherein the absorbent composite has a light transmittance of at least 45%.

2. The translucent absorbent composite of claim 1, wherein the functional group of the absorbent material comprises a functional group selected from the group consisting of a carboxylic acid functional group, a sulphonic acid, a phosphoric acid, mixtures thereof and salts thereof.

3. The translucent absorbent composite of claim 1, wherein the substrate comprises a film material.

4. The translucent absorbent composite of claim 1, wherein the substrate comprises a liquid permeable material.

5. The translucent absorbent composite of claim 4, wherein the liquid-permeable material comprises a nonwoven web.

6. The translucent absorbent composite of claim 1, further comprising an additional layer, wherein the substrate and the absorbent material applied to the substrate are adjacent to the additional layer.

7. The translucent absorbent composite of claim 6, wherein the additional layer comprises a liquid permeable material.

8. The translucent absorbent composite of claim 6, wherein the additional layer comprises a liquid impermeable material.

9. The translucent absorbent composite of claim 6, wherein the additional layer alone has a light transmittance of at least 60%.

10. The translucent absorbent composite of claim 6, wherein the substrate comprises a liquid permeable material and the additional layer comprises a liquid impermeable material.

11. The translucent absorbent composite of claim 10, wherein the substrate comprises a nonwoven web and the additional layer comprises a film.

12. The translucent absorbent composite of claim 11, wherein the nonwoven web and the film contain less than about 1% by weight of filler, pigment, or dye.

13. The translucent absorbent composite of claim 6, further comprising a second additional layer, wherein the substrate and the absorbent material applied to the substrate are positioned between the first additional layer and the second additional layer.

14. The translucent absorbent composite of claim 13, wherein the first additional layer comprises a liquid impermeable material and the second additional layer comprises a liquid permeable material.

15. The translucent absorbent composite of claim 14, wherein the first additional layer and the second additional layer each have a light transmittance of at least 60%.

16. The translucent absorbent composite of claim 15, wherein the absorbent composite has a light transmittance of about 65% to about 79%.

17. The translucent absorbent composite of claim 16, wherein the first additional layer and the second additional layer each have a light transmittance of at least 80%.

18. The translucent absorbent composite of claim 1, wherein the absorbent material further comprise between about 0.1% and about 75% by mass of units selected from the group consisting of polyolefin glycol and polyolefin oxide units.

19. The translucent absorbent composite of claim 18, wherein the absorbent material comprises about 25 to about 90% by mass of monoethylenically unsaturated polymer units, about 0.5 to about 15% by mass polyacrylate ester units having an alkoxysilane functionality, and about 10 to about 60% by mass polymer units selected from the group consisting of polyolefin glycol units, polyolefin oxide units, and combinations thereof.

20. The translucent absorbent composite of claim 1, wherein the absorbent material comprises about 25 to about 90% by mass of monoethylenically unsaturated polymer units, about 0.5 to about 15% by mass polyacrylate ester units having an alkoxysilane functionality, and about 10 to about 60% by mass polymer units selected from the group consisting of polyolefin glycol units, polyolefin oxide units, and combinations thereof.

21. A translucent absorbent composite comprising a backing layer and an absorbent layer, said absorbent layer is positioned adjacent the backing layer, the absorbent layer comprises a substrate and an absorbent material applied to the substrate, the absorbent material comprises an absorbent prepared from a water soluble ionic polymer comprising about 15 to about 99.9% by mass monoethylenically unsaturated polymer units having at least one functional group, about 0.1 to about 20% by mass ester units selected from the group consisting of acrylate and methacrylate ester units having an alkoxysilane functionality, wherein the absorbent layer has a light transmittance of at least 45% and the backing layer has a light transmittance of at least 60%, wherein in the absorbent composite has a minimum light transmittance of at least 45%.

22. The absorbent composite of claim 21, further comprising a liner layer, wherein the liner layer is positioned in the absorbent composite such that the absorbent layer is positioned between the liner layer and the backing layer, wherein the liner layer has a light transmittance of at least 60%.

23. The absorbent composite of claim 22, wherein the absorbent composite has a perimeter region and a central region, the backing layer and the liner layer are each present in both the perimeter region and the central region, and the absorbent layer is positioned between the backing layer and the liner layer only in the central region of the absorbent composite.

24. The absorbent composite of claim 23, wherein the perimeter region of the absorbent composite has a light transmittance of at least 80% and the central region has a light transmittance of between about 65% and about 79%.

25. The absorbent of claim 22, wherein the backing layer comprises a liquid impermeable material and the liner layer comprises a liquid permeable material.

26. The absorbent composite of claim 25, wherein the absorbent composite has a perimeter region and a central region, the backing layer and the liner layer are each present in both the perimeter region and the central region, and the absorbent layer is positioned between the backing layer and the liner layer only in the central region of the absorbent composite.

27. The absorbent composite of claim 26, wherein the perimeter region of the absorbent composite has a light transmittance of at least 60% and the central region has a light transmittance of at least 45%.

28. The absorbent composite of claim 27, wherein the perimeter region of the absorbent composite has a light transmittance of at least 80% and the central region has a light transmittance of between about 65% and about 79%.

29. The absorbent composite of claim 28, wherein the liquid impermeable material of the backing layer comprises a film, the absorbent layer substrate comprises a nonwoven web and the liquid permeable material of the liner layer comprises a nonwoven web.

30. The absorbent composite of claim 29, wherein the liquid impermeable material of the backing layer comprises a polyolefin film, the absorbent layer substrate comprises a spunbond nonwoven web and the liquid permeable of the liner layer comprises a spunbond nonwoven web.

31. The absorbent composite of claim 30, wherein each spunbond nonwoven web has a basis weight of between about 7 gsm and about 100 gsm.

32. The absorbent composite of claim 21, wherein the absorbent composite has an overall thickness of between about 0.25 mm to about 2.0 mm.

33. An absorbent article comprising the absorbent composite of claim 21.

59. The absorbent composite of claim 21, wherein absorbent composite has a perimeter region and a central region, the backing layer is present in both the perimeter region and the central region, and the absorbent layer is positioned on the backing layer and in the central region of the absorbent composite.

60. The absorbent composite of claim 59, wherein the perimeter region of the absorbent composite has a light transmittance of at least 80% and the central region has a light transmittance of between about 65% and about 79%.

34. A translucent absorbent article comprising a backing layer, an absorbent layer and a bodyside liner, said absorbent layer is positioned between the bodyside liner and the backing layer, the absorbent layer comprises a substrate and an absorbent material applied to the substrate, the absorbent material comprises an absorbent prepared from a water soluble ionic polymer water soluble comprising about 15 to about 99.9% by mass monoethylenically unsaturated polymer units having at least one functional group, about 0.1 to about 20% by mass ester units selected from the group consisting of acrylate and methacrylate ester units having an alkoxysilane functionality, wherein the absorbent layer has a light transmittance of at least 45% and the backing layer and the bodyside liner each have a light transmittance of at least 60%, wherein in the absorbent article has a minimum light transmittance of at least 45%.

35. The absorbent article of claim 34, wherein absorbent article has a perimeter region and a central region, the backing layer and the bodyside liner are each present in both the perimeter region and the central region, and the absorbent layer is positioned between the bodyside liner and the backing layer only in the central region of the absorbent composite.

36. The absorbent article of claim 35, wherein the perimeter region of the absorbent article has a light transmittance of at least 60% and the central region of the absorbent article has a light transmittance of at least 45%.

37. The absorbent article of claim 35, wherein the perimeter region of the absorbent article has a light transmittance of at least 80% and the central region of the absorbent article has a light transmittance of between about 65% and about 79%.

38. The absorbent article of claim 37, wherein the backing layer comprises a film or a breathable nonwoven web, the absorbent layer substrate comprises a nonwoven web and the bodyside liner comprises a nonwoven web.

39. The absorbent article of claim 38, wherein the backing layer comprises a polyolefin film, the absorbent layer substrate comprises a spunbond nonwoven web and the bodyside liner comprises a spunbond nonwoven web.

40. The absorbent article of claim 39, wherein each spunbond nonwoven web has a basis weight of between about 7 gsm and about 100 gsm.

41. The absorbent article of claim 34, wherein the absorbent composite has an overall thickness of between about 0.25 mm to about 5.0 mm.

42. The absorbent article of claim 41, wherein the absorbent composite has an overall thickness of between about 0.25 mm to about 1.5 mm.

43. The absorbent article of claim 34, further comprising a garment attachment adhesive applied to a side of the backing layer opposite the absorbent layer, wherein the garment attachment adhesive has a light transmittance of at least 60%.

44. The absorbent article of claim 43, wherein the garment attachment adhesive has a light transmittance of at least 80%.

45. The absorbent article of claim 43, further comprising a peel strip attached to the garment adhesive, wherein the peel strip has a light transmittance of at least 60%.

46. The absorbent article of claim 43, wherein the peel strip has a light transmittance of at least 80%.

47. The absorbent article of claim 34, further comprising a garment attachment adhesive and a peel strip, said garment attachment adhesive is applied to a side of the backing layer opposite the absorbent layer, wherein the garment attachment adhesive has a light transmittance of at least 80% and the peel strip has a light transmittance of at least 80%, wherein the absorbent article has a perimeter region and a central region, the backing layer and the bodyside liner are each present in both the perimeter region and a central region, the absorbent layer is positioned between the bodyside liner and the backing layer only in the central region of the absorbent article;

and the perimeter region of the absorbent article has a light transmittance of at least 70% and the central region of the absorbent article has a light transmittance of between about 65% and about 79%.

48. The absorbent article of claim 34, wherein the absorbent material is impregnated into the substrate of the absorbent layer.

49. The absorbent article of claim 34, wherein the functional group of the absorbent material comprises a functional group selected from the group consisting of a carboxylic acid functional group, a sulphonic acid, a phosphoric acid, mixtures thereof and salts thereof.

50. The absorbent article of claim 34, wherein the absorbent material comprises about 25 to about 90% by mass of monoethylenically unsaturated polymer units, about 0.5 to about 15% by mass polyacrylate ester units having an alkoxysilane functionality, and about 10 to about 60% by mass polymer units selected from the group consisting of polyolefin glycol units, polyolefin oxide units, and combinations thereof.

51. The absorbent article of claim 34, wherein the absorbent material further comprise between about 0.1% and about 75% by mass of units selected from the group consisting of polyolefin glycol and polyolefin oxide units.

52. The absorbent article of claim 34, wherein the backing layer comprises a liquid impermeable material and the bodyside liner comprises a liquid permeable material.

53. The absorbent article of claim 52, wherein the absorbent article comprises a sanitary napkin, an incontinence pad, a pantiliner, a bandage, a bed pad or a furniture pad.

54. The absorbent article of claim 34, wherein the absorbent article comprises a sanitary napkin, an incontinence pad, a pantiliner, a bandage, a bed pad or a furniture pad.

55. The absorbent article of claim 34, wherein the absorbent article has a perimeter region and a central region, wherein the backing layer, absorbent layer and the bodyside liner cover are present in the central region, and the backing layer and optionally the bodyside liner are present in the perimeter region;

the absorbent article further comprises an adhesive applied to a portion of the perimeter region of the absorbent article on the side in which the absorbent layer is located;

said adhesive has a light transmittance of at least 80%, and the perimeter region of the absorbent article has a light transmittance of at least 80% and the central region of the absorbent article has a light transmittance of between about 65% and about 79%.

56. The absorbent article of claim 55, wherein the backing layer comprises an apertured film.

57. The absorbent article of claim 56, wherein the absorbent article comprises a bandage.

58. The absorbent article of claim 34, wherein the absorbent article comprises a bed pad or a furniture pad.

61. An absorbent article comprising a body contacting surface, a surface opposed the body contacting surface, an absorbent core position between the body contacting surface and the surface opposed the body contacting surface, longitudinal edges extending along an edge of absorbent core, and flaps, said flaps extend from the longitudinal edges of the absorbent article and the flaps comprise an absorbent material wherein the flaps each have a light transmittance of at least 45%.

62. The absorbent of claim 61, wherein the absorbent material of the flaps is prepared from a water soluble ionic polymer comprising about 15 to about 99.9% by mass monoethylenically unsaturated polymer units having at least one functional group, about 0.1 to about 20% by mass ester units selected from the group consisting of acrylate and methacrylate ester units having an alkoxysilane functionality.