Comfortable diaper

• US 10,660,800 B2
• Filed: 12/11/2014
• Issued: 05/26/2020
• Est. Priority Date: 02/12/2003
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Becker, Uwe Jurgen, Busam, Ludwig, Ehrnsperger, Bruno Johannes, 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:
  US14/566,886
• Publication Number:
  US 20150133882A1
• Time in Patent Office: 1,993 Days
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• CPC Class Codes: A61F 13/534 having an inhomogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence; homogeneous cores with tissue wrapping A61F13/53
• CPC Class Codes: A61F 13/535 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes A61F13/5323, A61F13/537 take precedence
• 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 2013/530481 having superabsorbent materials, i.e. highly absorbent polymer gel materials

Abstract

An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort. Specifically disclosed is an absorbent core useful for an absorbent article comprising a substrate layer and absorbent material, the absorbent material comprising an absorbent polymer material, the absorbent material optionally comprising absorbent fibrous material, the absorbent fibrous material not representing more than 20% of the weight of absorbent polymer material, wherein the absorbent material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than 50%, preferably of more than 60%, 70%, 80% or 90% according to the Wet Immobilization Test described herein.

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 a substrate layer, a discontinuous layer of absorbent material deposited on the substrate layer, a cover layer, and two different adhesives disposed between the substrate layer and the cover layer;

wherein the absorbent material comprises absorbent polymer material;

wherein areas of direct adhesive contact between the cover layer and the substrate layer are areas of junction;

wherein the areas of junction are disposed along lines parallel with longitudinal edges of the absorbent core, creating channels in the longitudinal direction of the absorbent core, and wherein areas of junction are substantially free of absorbent material,

wherein the disposable absorbent article is selected from the group of diapers, adult incontinence briefs, sanitary napkins and training pants.

2. The disposable absorbent article of claim 1, wherein the absorbent polymer material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than about 50% according to the Wet Immobilization Test described herein.

3. The disposable absorbent article of claim 1, wherein at least one of the two adhesives is a hot melt adhesive.

4. The disposable absorbent article of claim 1, further comprising a second substrate.

5. The disposable absorbent article of claim 1, further comprising a second absorbent core identical to the first absorbent core.

6. The disposable absorbent article of claim 1, wherein the absorbent core has a distribution of absorbent polymer material, wherein the distribution of absorbent polymer material is profiled.

7. The disposable absorbent article of claim 1, wherein the absorbent polymer material is present throughout the area of the absorbent core in an average basis weight of at least about 100 g/m².

8. The disposable absorbent article of claim 1, wherein the substrate layer comprises a permanently hydrophilic non-woven having a surface tension of at least about 55 mN/m when being wetted with saline solution and having a liquid strike through time of less than about 5 s for a fifth gush of liquid.

9. The disposable absorbent article of claim 1, wherein the cover layer comprises a permanently hydrophilic non-woven having a surface tension of at least about 55 mN/m when being wetted with saline solution and having a liquid strike through time of less than about 5 s for a fifth gush of liquid.

10. 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 a substrate layer, a discontinuous layer of absorbent material deposited on the substrate layer, a cover layer, and two different adhesives disposed between the substrate layer and the cover layer;

wherein the absorbent material comprises absorbent polymer material and cellulosic material;

wherein areas of direct adhesive contact between the cover layer and the substrate layer are areas of junction;

wherein the areas of junction are disposed along lines parallel with longitudinal edges of the absorbent core, creating channels in the longitudinal direction of the absorbent core, and wherein the areas of junction are substantially free of cellulosic material,

wherein the disposable absorbent article is selected from the group of diapers, adult incontinence briefs, sanitary napkins and training pants.

11. The disposable absorbent article of claim 10, wherein at least one of the cover layer or the substrate layer comprises a permanently hydrophilic non-woven having a surface tension of at least about 55 mN/m when being wetted with saline solution and having a liquid strike through time of less than about 5 s for a fifth gush of liquid.

12. The disposable absorbent article of claim 10, wherein at least one of the two adhesives is a hot melt adhesive.

13. The disposable absorbent article of claim 10, further comprising a second substrate.

14. The disposable absorbent article of claim 10, wherein the absorbent polymer material is present throughout the area of the absorbent core in an average basis weight of at least about 100 g/m².

15. The disposable absorbent article of claim 10, wherein the absorbent polymer material is immobilized when wet such that the absorbent core achieves a wet immobilization of more than about 50% according to the Wet Immobilization Test described herein.

16. The disposable absorbent article of claim 10, wherein the absorbent core has a distribution of absorbent polymer material, wherein the distribution of absorbent polymer material is profiled.