Method of making a slitted or particulate absorbent material and structures formed thereby

• US 6,410,820 B1
• Filed: 02/20/1998
• Issued: 06/25/2002
• Est. Priority Date: 11/14/1997
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Lavon, Gary Dean, Roe, Donald Carroll, Noel, John Richard, Hammons, John Lee, McFall, Ronald Ray
• Primary Examiner(s): Ruhl, Dennis
• Application Number:
  US09/027,039
• Time in Patent Office: 1,586 Days
• Field of Search: 604/358, 604/385.1, 604/369, 604/385.01, 604/385.101, 604/385.23, 428/67, 428/158-160, 428/304.4
• US Class Current: 604/369
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/495 with faecal cavity
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets

Abstract

A method of making a slitted or particulate absorbent material for an absorbent article such as sanitary napkins, diapers, incontinence devices, and the like is disclosed. More particularly, the present invention relates to a method as described above which can be carried out in situ on another component of the absorbent article in a manufacturing process without cutting the other component. In one embodiment, the absorbent material is placed between two carrier webs, and a force is applied to the composite of the absorbent material and the carrier webs. The force breaks the absorbent material, but only deforms the carrier webs to provide a self-contained web of particulate material between two carrier webs.

Absorbent structures formed by this method are also disclosed. In one embodiment, the absorbent structure comprises a composite web of discrete elements of absorbent material. The composite web comprises at least one carrier web and a plurality of discrete elements of absorbent material arranged in an orderly array on the carrier web. In one embodiment, the discrete elements of absorbent material are positioned adjacent to each other without any intervening material between the discrete elements of absorbent material.

Claims

1. A composite structure of discrete elements of absorbent material for use in a disposable absorbent article, said composite structure comprising:

at least one carrier material; and

a plurality of discrete elements of absorbent material arranged in an orderly array on said carrier material, wherein said discrete elements are adjoined to each other without any intervening material between said discrete elements of absorbent material and wherein at least some of said discrete elements of absorbent material are joined to said carrier material

wherein said discrete pieces of absorbent material comprise absorbent foam material.

2. The composite structure of absorbent material of claim 1 wherein said discrete elements of absorbent material have a generally regular shape.

3. The composite structure of absorbent material of claim 1 wherein said discrete elements of absorbent material are in the shape of polyhedrons.

4. The composite structure of absorbent material of claim 1 wherein said discrete elements of absorbent material comprise rectangular prisms.

5. The composite structure of absorbent material of claim 1 wherein said absorbent material comprises an absorbent foam material and said discrete elements of absorbent material comprise more than three elements of absorbent foam material that are in the shape of strips.

6. The composite structure of discrete elements of absorbent material of claim 1 wherein said discrete elements of absorbent material are in the form of columns of absorbent material extending outward from said carrier material.

7. The composite structure of discrete elements of absorbent material of claim 1 wherein said absorbent material has a first surface adjacent to said carrier material and an opposed second surface, further comprising an opposing carrier material disposed adjacent said second surface of said absorbent material.

8. The composite structure of claim 7 wherein at least one of said carrier materials has slits therein.

9. The composite structure of claim 7 wherein at least one of said carrier materials is extensible.

10. The composite structure of claim 9 wherein said at least one carrier material comprises a structural elastic-like material comprising a network of strainable regions that exhibit an elastic-like behavior in the direction of elongation without the use of added elastic materials.