Sanitary napkin comprising three dimensionally shaped tube of absorbent material

• US 6,316,688 B1
• Filed: 04/27/1998
• Issued: 11/13/2001
• Est. Priority Date: 04/27/1998
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Grandison, Kevin Eugene, Noel, John Richard, Hammons, John Lee, Osborn, Thomas Ward III, Hines, Letha Margie, Gann, Diana Lynne, McFall, Ronald Ray
• Primary Examiner(s): Lewis, Aaron J.
• Assistant Examiner(s): BOGART, MICHAEL G
• Application Number:
  US09/067,167
• Time in Patent Office: 1,296 Days
• Field of Search: 604/385.1, 604/378, 604/380, 604/369, 604/358, 604/385.12, 604/385.19, 604/385.01
• US Class Current: 604/378
• CPC Class Codes: A61F 13/47227 for interlabial use

Abstract

A sanitary napkin that has a three dimensionally-shaped tube of absorbent material and method of making the same is disclosed. The sanitary napkin comprises: a base pad having a body-facing side, a garment-facing side, and a longitudinal centerline. A tube of absorbent material extends outward from the body-facing side of the base pad and is aligned along the longitudinal centerline of the base pad. In one embodiment, the tube of absorbent material comprises an absorbent material and a cover at least partially wrapping the absorbent material. In this embodiment, the absorbent material is penetrated by autogenous bonds that join one portion of the cover to an opposing portion of the cover. The bonds are selectively placed to provide the tube of absorbent material with a distinct three-dimensional shape.

Claims

1. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said absorbent material is penetrated by autogenous bonds that join one portion of said cover to an opposing portion of said cover.

2. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing, side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said autogeneous bonds physically segregate a first portion of said tube of absorbent material from a second portion of said tube of absorbent material.

17. The absorbent article of claim 2 further comprising a containment web wherein said absorbent material is in the form of a folded web of absorbent material having a pair of longitudinial side margins, and the web of absorbent material is folded with said containment web about longitudinally oriented folding axes so that said folded web of absorbent material and said containment web define a central inverted U-shaped cross-sectional configuration which forms the top portion of said folded web, and two laterally opposed U-shaped portions that form the bottom portion of said folded web, and the longitudinal side margins of said folded web of absorbent material extend upward outside the central inverted U-shaped portion in the direction of the top portion thereof, and are folded back downward to form a flexible side extension on each side of the tube of absorbent material.

18. The absorbent article according to claim 17 wherein said central lobe fits at least partially interlabially, and the flexible side extension are capable of staying in contact with the inside surfaces of the wearer'"'"'s labia.

3. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said autogeneous bonds physically segregate a first portion of said tube of absorbent material from a second portion of said tube of absorbent material

wherein said first portion of said tube of absorbent material comprises a tubular ridge.

4. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said autogeneous bonds physically segregate a first portion of said tube of absorbent material from a second portion of said tube of absorbent material

herein said first portion of said tube of absorbent material comprises a tubular ridge

wherein said second portion of said tube of absorbent material has a generally oval cross-sectional configuration, said oval having a pair of longer sides, and a pair of shorter curved sides, wherein one of the longer sides is adjacent to the body-facing side of said base pad.

5. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet, and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said autogeneous bonds physically segregate a first portion of said tube of absorbent material from a second portion of said tube of absorbent material

wherein said first portion of said tube of absorbent material comprises a tubular ridge

wherein said second portion of said tube of absorbent material has a generally oval cross-sectional configuration, said oval having a pair of longer sides, and a pair of shorter curved sides, wherein one of the longer sides is adjacent to the body-facing side of said base pad

wherein said absorbent article has at least three regions having different calipers measured through said entire absorbent article, said regions comprising;

(a) a first region lying along said longitudinal centerline and comprising said tubular ridge, which has a first caliper;

(b) a second region lying laterally outboard of said tubular ridge of said first region and comprising said second portion of said tube of absorbent material, which has a second caliper; and

(c) a third region lying laterally outboard of said second region and comprising said base pad, which has a third caliper,

wherein said first caliper is greater than said second caliper, and said second caliper is greater than said third caliper.

6. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned alone the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said absorbent material is penetrated by autogenous bonds that join one portion of said cover to an opposing portion of said cover

wherein said absorbent article having a center and a pair of ends, wherein the tube of absorbent material has a pair of ends, and said ends of the tube of absorbent material are unbonded, and splayed out and attached to the base pad so that the tube of absorbent material has its highest caliper in the center of the absorbent article along the transverse centerline and tapers to a lesser caliper toward the ends of the absorbent article.

7. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said absorbent material is penetrated by autogenous bonds that join one portion of said cover to an opposing portion of said cover

wherein said absorbent article having a center and a pair of ends wherein the tube of absorbent material has a pair of ends and said ends of the tube of absorbent material are unbonded, and splayed out and attached to the base pad so that the tube of absorbent material has its highest caliper in the center of the absorbent article along the transverse centerline and tapers to a lesser caliper toward the ends of the absorbent article

wherein said absorbent article having a first end region, a second region, and a central region positioned between said first and second end regions wherein the ends of said tube of absorbent material are splayed out so that said tube of absorbent material is wider in said first and second regions than it is in said central region.

8. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material, comprising an absorbent material and a cover at least partially wrapping said absorbent material said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said tube of absorbent material comprises pieces of absorbent material that are generally in the shape of parallelepipeds.

9. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerlines, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said tube of absorbent material comprises pieces of absorbent material that are generally in the shape of parallelepipeds

wherein said pieces of absorbent material comprise absorbent foam.

10. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said tube of absorbent material comprises pieces of absorbent material that are generally in the shape of parallelepipeds

wherein said absorbent article further comprising absorbent gelling material.

11. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material, comprising an absorbent material and a cover at least partially wrapping said absorbent material said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said tube of absorbent material has a length and at least a portion of said tube of absorbent material along its length has a tri-lobal cross-sectional configuration

wherein said absorbent article comprising a containment web wherein said absorbent material is in the form of a folded web of absorbent material having a pair of longitudinal side margins, and the web of absorbent material is folded with said containment web about longitudinally oriented folding axes so that said folded web of absorbent material and said containment web define a central inverted U-shaped cross-sectional configuration which forms the top portion of said folded web, and two laterally opposed U-shaped portions that form the bottom portion of said folded web, and the longitudinal side margins of said folded web of absorbent material extend upward inside said central inverted U-shaped portion toward said top portion thereof.

12. The absorbent article of claim 11 wherein said folded web of absorbent material comprises an absorbent foam material having a plurality of cells therein.

13. The absorbent article of claim 12 wherein said folded web of absorbent foam material is comprised of a plurality of discrete particles of absorbent foam material.

14. The absorbent article of claim 12 wherein said folded web of absorbent foam material comprises a central region along the principal longitudinal centerline having a first softness and cells having a first cell size, and outer regions spaced laterally outward from said central region that have a second softness and cells having a second cell size wherein said first softness is softer than said second softness and said first cell size is greater than said second cell size.

15. The absorbent article of claim 12 wherein said folded web of absorbent material has an upper surface and an underside, and further comprises an absorbent gelling material adjacent to at least a portion of the underside of said folded web of absorbent foam material.

16. The absorbent article of claim 11 wherein at least a portion of said folded web of absorbent material has slits therein.

19. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein at least a portion of said tube of absorbent material is integrated into the base pad

wherein said absorbent article further comprising a containment web wherein said absorbent material is in the form of a folded web of absorbent material having a pair of longitudinal side margins and a base, and the web of absorbent material is folded with said containment web about longitudinally oriented folding axes so that said folded web of absorbent material and said containment web define a pair of central portions which have inverted U-shaped cross-sectional configurations and the longitudinal side margins of the folded web of absorbent material extend laterally outward at the base of said folded web of absorbent material.

20. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said base pad has a pair of end edges, and said tube of absorbent material has a pair of end portions, at least one of which end portions has an adhesive fastener thereon for attachment to said base pad, and said base pad further comprises an adhesive fastener on said garment-facing side, wherein said adhesive fastener is covered with a removable cover strip, which removable cover strip extends beyond at least one of the end edges of said base pad and is folded around said at least one end edge of said base pad and positioned between the adhesive fastener on the end of said tube of absorbent material and the body-facing side of the base pad, and said adhesive fastener on the end of said tube of absorbent material is releasably attached to said removable cover strip.

21. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising one or more lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said tube of absorbent material has a pair of ends, each of which has a hole therein, and said sanitary napkin further comprises a string which passes through said tube of absorbent material and exits each end of said tube of absorbent material through said holes, wherein said string has a length that is greater than the length of said tube of absorbent material.

22. An absorbent article comprising:

a base pad having a body-facing side, a garment-facing side, a longitudinal centerline, and a transverse centerline, said base pad comprising a liquid previous topsheet, a liquid impervious backsheet joined to said topsheet, and an absorbent core positioned between said topsheet and said backsheet; and

a three dimensionally-shaped tube of absorbent material extending outward from the body-facing side of said base pad and aligned along the longitudinal centerline of said base pad, said tube of absorbent material comprising an absorbent material and a cover at least partially wrapping said absorbent material, said three dimensionally-shaped tube of absorbent material comprising a plurality of lobes that are segregated from at least one other portion of the tube of absorbent material

wherein said absorbent material is only partially penetrated by bonds that join said cover material to said absorbent material.

23. A sanitary napkin having a longitudinal center line, a first end region, a second end region, and a central region positioned between said first and second end regions, said sanitary napkin comprising:

a liquid previous topsheet;

a liquid impervious backsheet joined to said topsheet; and

an absorbent core positioned between said topsheet and said backsheet, said absorbent core having a displaceable area therein along said longitudinal centerline, said displaceable area being sized to accommodate one or more of a wearer'"'"'s fingers, or portions thereof,

wherein a portion of said topsheet and backsheet cover said displaceable area, and said portions of said topsheet and backsheet covering, said displaceable area are extensible, said portions of said topsheet and said backsheet being generally co-planar with the portions of said topsheet and backsheet that lie outside said displaceable area until a wearer inserts her finger into the same, and after a wearer inserts her finger into said displaceable area, said portions of said topsheet and said backsheet can extend beyond the plane of said topsheet and backsheet to move into closer proximity to the space between the wearer'"'"'s labia.

24. The sanitary napkin of claim 23 wherein said displaceable area in said absorbent core comprises a recessed area.