Thin and dry diaper

• US 8,674,170 B2
• Filed: 10/10/2007
• Issued: 03/18/2014
• Est. Priority Date: 02/12/2003
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Busam, Ludwig, Becker, Uwe Jurgen, Divo, Michael, Ehrnsperger, Bruno Johannes, Engel, Roland, Lindner, Torsten, Link, Siegfried, Maier, Volker, Siddiquee, Sanaul Kabir, Stiehl, Gabriele, Tombuelt, Thomas
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): TREYGER, ILYA Y
• Application Number:
  US11/973,811
• Publication Number:
  US 20080125735A1
• Time in Patent Office: 2,351 Days
• Field of Search: 604/358, 604/366, 604/368, 604/370, 604/378, 604/385.01, 604/385.23
• US Class Current: 604/368
• CPC Class Codes: A61F 13/15658 Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
• CPC Class Codes: A61F 13/15699 Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• CPC Class Codes: A61F 13/536 having discontinuous areas of compression
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 2013/530547 positioned in a separate layer or layers
• CPC Class Codes: A61F 2013/5395 with thermoplastic agent, i.e. softened by heat
• CPC Class Codes: B32B 2310/024 Peltier effect
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 156/1062 Prior to assembly

Abstract

An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed having an absorbent core which imparts increased wearing comfort to the article and makes it thin and dry. The absorbent core useful for an absorbent article comprises a substrate layer, a discontinuous layer of absorbent material, and a layer of thermoplastic material. A second surface of the discontinuous layer of absorbent material is in at least partial contact with a first surface of the substrate layer. Portions of a second surface of the layer of thermoplastic material are in direct contact with the first surface of the substrate layer and portions of said second surface of the layer of thermoplastic material are in direct contact with a first surface of the discontinuous layer of absorbent material. A process for providing a storage layer for an absorbent core useful in an absorbent article is further disclosed.

Claims

1. A disposable absorbent article comprising:

a chassis including a topsheet and a backsheet; and

an absorbent core located between the topsheet and the backsheet;

wherein the absorbent core comprises first and second substrate layers;

a discontinuous layer of absorbent material deposited on each of the first and second substrate layers; and

a thermoplastic material encasing each of the discontinuous layers of absorbent material;

wherein the thermoplastic material contacts at least portions of the absorbent material and at least portions of the first and second substrate layers forming areas of junction where the thermoplastic material contacts the first and second substrate layers;

wherein the first and second substrate layers are combined together such that the thermoplastic material of each of the first and second substrate layers contact one another such that the absorbent material of the first substrate layer faces the areas of junction of the second substrate layer and the absorbent material of the second substrate layer faces the areas of junction of the first substrate layer;

such that the areas of junction are offset.

2. The disposable absorbent article of claim 1, wherein the thermoplastic material is a hot melt adhesive.

3. The disposable absorbent article of claim 1, wherein the thermoplastic material comprises a net-like structure.

4. The disposable absorbent article of claim 1, wherein the substrate layer further comprises an auxiliary adhesive.

5. The disposable absorbent article of claim 1, further comprising a cover layer comprising the same material as the substrate, the thermoplastic material being disposed between the substrate and the cover layer.

6. The disposable absorbent article of claim 1, wherein the areas of junction are selected from the group consisting of square-shaped, rectangle-shaped, and circle-shaped.

7. The disposable absorbent article of claim 6, wherein the areas of junction are circle-shaped and have diameters of from about 0.5 mm to about 10 mm.

8. The disposable absorbent article of claim 7, wherein the areas of junction have diameters of from about 1 mm to about 5 mm.

9. The disposable absorbent article of claim 8, wherein the areas of junction have diameters of from about 1.5 mm to about 2 mm.

10. The disposable absorbent article of claim 1, wherein the areas of junction form a regular pattern.

11. The disposable absorbent article of claim 10, wherein the areas of junction form lines.

12. The disposable absorbent article of claim 11, wherein the lines are aligned along a longitudinal axis of the absorbent core.

13. The disposable absorbent article of claim 11, wherein the lines are oriented at an angle to a longitudinal axis of the absorbent core.

14. The absorbent article of claim 13, wherein the angle is from about 20 degrees to about 45 degrees relative to the longitudinal axis of the absorbent core.

15. The absorbent article of claim 1, wherein the areas of junction are polygons.