Disposable absorbent article

• US 20070093164A1
• Filed: 05/10/2004
• Published: 04/26/2007
• Est. Priority Date: 05/09/2003
• Status: Active Grant

• Current Assignee: Livedo Corporation
• Original Assignee: Livedo Corporation
• Inventors: Nakaoka, Kenji
• Granted Patent: US 8,524,355 B2
• Time in Patent Office: Days
• US Class Current: 442/385
• CPC Class Codes: A61F 13/536 having discontinuous areas of compression
• CPC Class Codes: Y10T 428/24826 Spot bonds connect components
• CPC Class Codes: Y10T 442/601 Nonwoven fabric has an elastic quality
• CPC Class Codes: Y10T 442/602 Nonwoven fabric comprises an elastic strand or fiber material
• CPC Class Codes: Y10T 442/659 Including an additional nonwoven fabric
• CPC Class Codes: Y10T 442/664 Including a wood fiber containing layer
• CPC Class Codes: Y10T 442/668 Separate nonwoven fabric layers comprise chemically different strand or fiber material
• CPC Class Codes: Y10T 442/673 Including particulate material other than fiber
• CPC Class Codes: Y10T 442/695 Including a wood containing layer
• CPC Class Codes: Y10T 442/698 Containing polymeric and natural strand or fiber materials
• CPC Class Codes: Y10T 442/699 Including particulate material other than strand or fiber material

Abstract

A disposable absorbent article includes an absorbent mat provided between a liquid-permeable top sheet and a liquid-impermeable back sheet. Herein, the absorbent mat includes a sheet-like water-absorbent layer that contains a water-absorbent resin powder but that does not contain pulp fibers, and a fiber assembly layer that contains both the water-absorbent resin powder and the pulp fibers, the sheet-like water-absorbent layer and the fiber assembly layer arranged sequentially in this order from a top sheet side. The fiber assembly layer includes a fiber presence region in which both the pulp fibers and the water-absorbent resin powder are present, and a fiber absence region in which both the pulp fibers and the water-absorbent resin powder are absent, the fiber presence region and the fiber absence region formed to be adjacent with each other.

Claims

1. A disposable absorbent article comprising an absorbent mat provided between a liquid-permeable top sheet and a liquid-impermeable back sheet, wherein

the absorbent mat includes a sheet-like water-absorbent layer that contains a water-absorbent resin powder but that does not contain pulp fibers, and a fiber assembly layer that contains both the water-absorbent resin powder and the pulp fibers, the sheet-like water-absorbent layer and the fiber assembly layer arranged sequentially in this order from a top sheet side, and

the fiber assembly layer includes a fiber presence region in which both the pulp fibers and the water-absorbent resin powder are present, and a fiber absence region in which both the pulp fibers and the water-absorbent resin powder are absent, the fiber presence region and the fiber absence region formed to be adjacent with each other.

2. The disposable absorbent article according to claim 1, wherein the fiber assembly layer includes the fiber presence region in which both the pulp fibers and the water-absorbent resin powder are present, and the fiber absence region in which both the pulp fibers and the water-absorbent resin powder are absent, the fiber presence region and the fiber absence region formed to be adjacent with each other between nonwoven fabric sheet.

3. The disposable absorbent article according to claim 1, wherein the sheet-like water-absorbent layer includes a plurality of water-absorbent resin powder presence regions in which both the water-absorbent resin powder are present, and a plurality of water-absorbent resin powder absence regions, the plurality of water-absorbent resin powder presence regions and the plurality of water-absorbent resin powder absence regions formed to be adjacent with one another between nonwoven fabric sheets.

4. The disposable absorbent article according to claim 1, wherein the sheet-like water-absorbent layer is superimposed on the fiber assembly layer so that all of or a part of the water-absorbent resin powder absence regions of said sheet-like water-absorbent layer are located on the fiber absence region of said fiber assembly layer.

5. The disposable absorbent article according to claim 3, wherein the nonwoven fabric sheets of the sheet-like water-absorbent layer are thermally bonded to each other in the water-absorbent resin powder absence regions

6. The disposable absorbent article according to claim 1, wherein the fiber absence region of the fiber assembly layer is formed in a longitudinal direction of the absorbent article, and an elastic member is bonded to the fiber absence region of the fiber assembly layer in an expanded state along the longitudinal direction.

7. The disposable absorbent article according to claim 1, wherein the fiber absence region of the fiber assembly layer is formed in a longitudinal direction of the absorbent article, and an elastic member is bonded to the back sheet on a fiber absence region side of the fiber assembly layer or to the back sheet through another sheet in an expanded state along the longitudinal direction.