Disposable Absorbent Article With Improved Acquisition System

• US 20080312622A1
• Filed: 06/18/2008
• Published: 12/18/2008
• Est. Priority Date: 06/18/2007
• Status: Abandoned Application

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Dziezok, Peter, Schmidt, Mattias, Beruda, Holger, Krause, Axel, Hundorf, Harald Hermann, Blessing, Horst, Stelzig, Lutz
• Application Number:
  US12/141,134
• Publication Number:
  US 20080312622A1
• Time in Patent Office: Days
• US Class Current: 604/366
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• CPC Class Codes: A61F 13/5376 characterised by the performance of the layer, e.g. acquisition rate, distribution time, transfer time

Abstract

A disposable absorbent article comprising a chassis including a topsheet and a backsheet, a substantially cellulose free absorbent core located between the topsheet and the backsheet and having a wearer facing side oriented toward a wearer when the article is being worn and an opposed garment facing side, and a liquid acquisition system disposed between the liquid permeable topsheet and the wearer facing side of the absorbent core comprising chemically cross-linked cellulosic fibers.

Claims

1. A disposable absorbent article comprising:

a chassis including a topsheet and a backsheet;

a substantially cellulose free absorbent core located between the topsheet and the backsheet and having a wearer facing side oriented toward a wearer when the article is being worn and an opposed garment facing side; and

a liquid acquisition system disposed between the liquid permeable topsheet and the wearer facing side of the absorbent core.

2. The disposable absorbent article of claim 1, wherein said liquid acquisition system comprises chemically cross-linked cellulosic fibers.

3. The disposable absorbent article of claim 2, wherein the cross-linked cellulosic fibers are crimped, twisted, curled, or a combination thereof.

4. The disposable absorbent article of claim 2, wherein the cross-linked cellulosic fibers have between about 0.5 mole % and about 10.0 mole % of a C₂ to C₉ polycarboxylic cross-linking agent.

5. The disposable absorbent article of claim 2, wherein the cross-linked cellulosic fibers have between about 1.5 mole % and about 6.0 mole % of a C₂ to C₉ polycarboxylic cross-linking agent.

6. The disposable absorbent article of claim 2, wherein the cross-linked cellulosic fibers have a water retention value of about 25 to about 60.

7. The disposable absorbent article of claim 1, wherein the liquid acquisition system further comprises a first acquisition layer including cross-linked cellulosic fibers and the first acquisition layer has a maximum uptake of about 10 g/g.

8. The disposable absorbent article of claim 1, wherein the liquid acquisition system further comprises a first acquisition layer including cross-linked cellulosic fibers and the first acquisition layer has a mean desorption pressure value of less than about 20.5 cm H₂O.

9. The disposable absorbent article of claim 1, wherein the liquid acquisition system further comprises a first acquisition layer including cross-linked cellulosic fibers and natural or synthetic polymeric fibers.

10. The disposable absorbent article of claim 1, wherein the liquid acquisition system further comprises a first acquisition layer including cross-linked cellulosic fibers, the first acquisition layer has a total dry weight, and the cross-linked cellulosic fibers are present on a dry weight basis in the first acquisition layer in an amount from about 30% to about 95% by weight of the first acquisition layer.

11. The disposable absorbent article of claim 1, wherein the liquid acquisition system further comprises a first acquisition layer including cross-linked cellulosic fibers and natural or synthetic polymeric fibers, the first acquisition layer has a total dry weight, the cross-linked cellulosic fibers are present on a dry weight basis in the first acquisition layer in an amount from about 30% to about 95% by weight of the first acquisition layer, and the natural or synthetic polymeric fibers are present on a dry weight basis in the first acquisition layer in an amount from about 70% to about 5% by weight of the first acquisition layer.

12. The disposable absorbent article of claim 1, wherein the liquid acquisition system further comprises a first acquisition layer including cross-linked cellulosic fibers and the first acquisition layer is a nonwoven.

13. The disposable absorbent article of claim 1, wherein the liquid acquisition system further comprises a first acquisition layer and a second acquisition layer, the first acquisition layer includes cross-linked cellulosic fibers, and the second acquisition layer is a nonwoven.

14. The disposable absorbent article of claim 12, wherein the first acquisition layer faces the wearer and the second acquisition layer faces the absorbent core when the article is being worn.

15. A disposable absorbent article of claim 1, wherein:

the absorbent polymer material comprises absorbent particulate polymer material;

the absorbent core includes first and second absorbent layers, the first absorbent layer including a first substrate and the second absorbent layer including a second substrate;

the absorbent particulate polymer material is deposited on said first and second substrates;

the absorbent core further comprises thermoplastic adhesive material covering the absorbent particulate polymer material on the respective first and second substrates; and

said first and second absorbent layers are combined together such that at least a portion of said thermoplastic adhesive material of said first absorbent layer contacts at least a portion of the thermoplastic adhesive material of said second absorbent layer.

16. A disposable absorbent article of claim 15, wherein the absorbent particulate polymer material is disposed between the first and second substrates in an absorbent particulate polymer material area, and the absorbent particulate polymer material is substantially continuously distributed across the absorbent particulate polymer material area.

17. The disposable absorbent article of claim 16, wherein:

the absorbent particulate polymer material is deposited on the first and second substrates in respective patterns of land areas and junction areas between the land areas such that the absorbent particulate polymer material is discontinuously distributed on the first and second substrates; and

the first and second absorbent layers are combined together such the respective patterns of absorbent particulate polymer material are offset from one another,

wherein the absorbent core has a length extending from a rear end to a front end, and a width extending from a first edge to a second edge and perpendicularly to the length, and the respective patterns are offset from one another in both a direction parallel to the length and a direction parallel to the width.

18. The disposable absorbent article of claim 16, wherein the absorbent particulate polymer material area extends substantially entirely across the absorbent core.

19. The disposable absorbent article of claim 1, wherein the absorbent core contains less than about 10% by weight cellulosic fibers.

20. The disposable absorbent article of claim 15, wherein the absorbent core consists essentially of the first and second substrates, the absorbent particulate polymer material, and the thermoplastic adhesive material.