Capillary laminate material

• US 5,500,270 A
• Filed: 03/14/1994
• Issued: 03/19/1996
• Est. Priority Date: 03/14/1994
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Ouellette, William R., Burchnall, John B., Langdon, Fred M.
• Primary Examiner(s): NAKARANI, DHIRAJLAL S
• Application Number:
  US08/212,487
• Time in Patent Office: 736 Days
• Field of Search: 428/131, 428/132, 428/133, 428/137, 428/138, 428/116, 428/118, 428/166, 428/167, 428/119, 604/385.1, 604/378, 604/383
• US Class Current: 428/119
• CPC Class Codes: A61F 13/512 characterised by its apertures, e.g. perforations
• CPC Class Codes: A61F 13/53 characterised by the absorbing medium A61F13/20 takes precedence
• CPC Class Codes: A61F 13/537 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer A61F13/538 takes precedence
• CPC Class Codes: Y10T 428/24149 Honeycomb-like
• CPC Class Codes: Y10T 428/24165 Hexagonally shaped cavities
• CPC Class Codes: Y10T 428/24174 including sheet or component perpendicular to plane of web or sheet
• CPC Class Codes: Y10T 428/24273 including aperture
• CPC Class Codes: Y10T 428/24281 Struck out portion type
• CPC Class Codes: Y10T 428/24289 Embedded or interlocked
• CPC Class Codes: Y10T 428/24322 Composite web or sheet
• CPC Class Codes: Y10T 428/24331 including nonapertured component
• CPC Class Codes: Y10T 428/24562 Interlaminar spaces
• CPC Class Codes: Y10T 428/2457 Parallel ribs and/or grooves

Abstract

The present invention pertains to a laminate material. The laminate material includes a first sheet and a second sheet spaced apart from one another by spacers to define a capillary zone for the capillary movement of fluid between the first and second sheets. The spacers connect the first sheet and the second sheet together to form the laminate material.

Claims

1. A laminate material comprising:

a first sheet and a second sheet, said first sheet being fluid pervious, said first sheet and said second sheet being spaced apart from one another by at least one spacer to define a capillary zone therebetween for the capillary movement of fluid, said spacer connecting said first sheet and said second sheet together to form said laminate material, said spacer maintaining said first sheet and said second sheet at a dimensional spacing sufficient to impart capillary forces to a fluid entering said capillary zone and move said fluid within said capillary zone via capillary pressure.

2. The laminate material of claim 1, wherein said second sheet is fluid impervious.

3. The laminate material of claim 1, wherein said second sheet is fluid pervious.

4. The laminate material of claim 1, wherein said first sheet includes a plurality of apertures.

5. The laminate material of claim 4, wherein said second sheet includes a plurality of apertures.

6. The laminate material of claim 5, wherein said apertures in said first sheet are larger than said apertures in said second sheet.

7. The laminate material of claim 5, wherein said first sheet and said second sheet are comprised of a polymeric material.

8. The laminate material of claim 1, wherein said capillary zone is divided into a plurality of capillary channels by said spacer.

9. The laminate material of claim 8, wherein said channels have a substantially non uniform shape along their length.

10. The laminate material of claim 8, wherein said channels have a substantially uniform shape along their length.

11. The laminate material of claim 8, wherein said channels are substantially straight along a portion of their length.

12. The laminate material of claim 8, wherein said channels are substantially straight along their entire length.

13. The laminate material of claim 8, wherein said channels are curvilinear.

14. The laminate material of claim 1, wherein said capillary zone has a substantially uniform dimension throughout said laminate material.

15. The laminate material of claim 1, wherein said capillary zone has a substantially non uniform dimension throughout said laminate material.

16. The laminate material of claim 1, wherein said spacers are formed from said first sheet.

17. The laminate material of claim 1, wherein said spacers are formed from said second sheet.

18. A laminate material comprising:

a first sheet having a plurality of apertures therein and a second sheet having a plurality of apertures therein, said first sheet and said second sheet being spaced apart from one another by a plurality of spacers to define a capillary zone therebetween for the capillary movement of fluid, at least one of said spacers connecting said first sheet and said second sheet together to form said laminate material, said spacers maintaining said first sheet and said second sheet at a dimensional spacing sufficient to impart capillary forces to a fluid entering said capillary zone and move said fluid within said capillary zone via capillary pressure.

19. The laminate material of claim 18, wherein said apertures in said first sheet are larger than said apertures in said second sheet.

20. The laminate material of claim 18, wherein said first sheet and said second sheet are comprised of a polymeric material.

21. The laminate material of claim 18, wherein substantially all of said spacers connect said first sheet and said second sheet together.

22. The laminate material of claim 18, wherein said capillary zone is divided into a plurality of capillary channels by said spacers.

23. The laminate material of claim 22, wherein said channels have a substantially non uniform shape along their length.

24. The laminate material of claim 22, wherein said channels have a substantially uniform shape along their length.

25. The laminate material of claim 22, wherein said channels are substantially straight along a portion of their length.

26. The laminate material of claim 22, wherein said channels are substantially straight along their entire length.

27. The laminate material of claim 22, wherein said channels are curvilinear.

28. The laminate material of claim 22, wherein said laminate material is an absorbent element in an absorbent article.

29. The laminate material of claim 18, wherein said capillary zone has a substantially uniform dimension throughout said laminate material.

30. The laminate material of claim 18, wherein said capillary zone has a substantially non uniform dimension throughout said laminate material.

31. A laminate material comprising:

at least two fluid pervious sheets being spaced apart from one another by a plurality of spacers to define a capillary zone therebetween for the capillary movement of fluid, said spacers connecting said fluid pervious sheets together, said spacers maintaining said fluid pervious sheets at a dimensional spacing sufficient to impart capillary forces to a fluid entering said capillary zone and move said fluid within said capillary zone via capillary pressure, said laminate material further comprising a fluid impervious sheet spaced apart from one of said fluid pervious sheets by a plurality of spacers to define a secondary zone therebetween for the movement of fluid, at least one of said spacers connecting one of said fluid pervious sheets to said fluid impervious sheet to form a laminate material.

32. The laminate material of claim 31, wherein said fluid pervious sheets include a plurality of apertures.

33. The laminate material of claim 31, wherein said fluid pervious sheets are comprised of a polymeric material.

34. The laminate material of claim 31, wherein said fluid impervious sheet is comprised of a polymeric material.

35. The laminate material of claim 31, wherein said secondary zone is a capillary zone and wherein said spacers maintain said fluid impervious sheet and said one of said fluid pervious sheets at a dimensional spacing sufficient to impart capillary forces to a fluid entering said capillary zone and move said fluid within said capillary zone via capillary pressure.

36. The laminate material of claim 35, wherein said capillary zone is divided into a plurality of capillary channels by said spacers.

37. The laminate material of claim 36, wherein said channels have a substantially non uniform shape along their length.

38. The laminate material of claim 36, wherein said channels have a substantially uniform shape along their length.

39. The laminate material of claim 36, wherein said channels are substantially straight along a portion of their length.

40. The laminate material of claim 36, wherein said channels are substantially straight along their entire length.

41. The laminate material of claim 36, wherein said channels are curvilinear.

42. An absorbent article including a wearer-contacting topsheet and an absorbent element for absorbing body fluids, said topsheet comprising:

a laminate material including a first sheet and a second sheet, said first sheet having a plurality of apertures therein, said second sheet having a plurality of apertures therein, said first sheet and said second sheet being spaced apart from one another by a plurality of spacers to define a capillary zone therebetween for the capillary movement of fluid, at least one of said spacers connecting said first sheet and said second sheet together to form said laminate material, said spacers maintaining said first sheet and said second sheet at a dimensional spacing sufficient to impart capillary forces to a fluid entering said capillary zone and move said fluid within said capillary zone via capillary pressure.

43. The absorbent article of claim 42, further including a backsheet secured to said topsheet, said backsheet being resistant to the passage of fluid therethrough.

44. The absorbent article of claim 42, wherein said laminate material is formed into a three-dimensional, macroscopically expanded, apertured web.

45. The absorbent article of claim 42, wherein said absorbent article is a disposable diaper.

46. The absorbent article of claim 42, wherein said absorbent article is a sanitary napkin.

47. An absorbent article including a wearer-contacting topsheet and an absorbent element for absorbing bodily fluids, said absorbent element comprising:

a laminate material including a first sheet and a second sheet, said first sheet having a plurality of apertures therein, said first sheet and said second sheet being spaced apart from one another by a plurality of spacers to define a capillary zone therebetween for the capillary movement of fluid, at least one of said spacers connecting said first sheet and said second sheet together to form said laminate material, said spacers maintaining said first sheet and said second sheet at a dimensional spacing sufficient to impart capillary forces to a fluid entering said capillary zone and move said fluid within said capillary zone via capillary pressure.