Comfortable diaper

Patent metadata

Field	Value
Publication number	US-10660800-B2
Application number	US-201414566886-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Feb 12, 2003
Publication date	May 26, 2020
Grant date	May 26, 2020

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.

First claim

What is claimed is:

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/m 2 .

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/m 2 .

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.

Assignees

• Procter & Gamble

Inventors

• Becker Uwe Jurgen
• Busam Ludwig
• Ehrnsperger Bruno Johannes
• Lindner Torsten
• Link Siegfried
• Maier Volker
• Siddiquee Sanaul Kabir
• Stiehl Gabriele
• Tombuelt Thomas

Classifications

• A61F13/534

  having an inhomogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence) · CPC title

• A61F13/535

  inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes ({A61F13/5323,} A61F13/537 take precedence) · CPC title

• A61F13/539

  characterised by the connection of the absorbent layers with each other or with the outer layers · CPC title

• A61F13/5323 Primary

  having absorbent material located in discrete regions, e.g. pockets · CPC title

• A61F13/15203 Primary

  Properties of the article, e.g. stiffness or absorbency (chemical aspects A61L15/00) · CPC title