Absorbent article with profiled acquisition-distribution system

Patent metadata

Field	Value
Publication number	US-9750651-B2
Application number	US-201314100083-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Dec 10, 2012
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

An absorbent article ( 20 ) having an absorbent core comprising at least about 80% of superabsorbent polymers (SAP) by weight of its absorbent material. An acquisition-distribution system (ADS) ( 50 ) is at least partially disposed between the absorbent core and the topsheet. The ADS extends in the longitudinal direction of the absorbent article at least from a point A 1 disposed at a distance D from the front edge to a point A 2 disposed at a distance D from the back edge of the article, D being equal to 32% of the length L of the article. The ADS has a basis weight which may be at least 20% lower at the point A 2 than at the point A 1 .

First claim

What is claimed is:

1. An absorbent article comprising a front end, a back end and a longitudinal axis extending in a longitudinal direction of the article, the article having a length L as measured along the longitudinal axis between the front end and the back end, the absorbent article comprising:
a liquid permeable topsheet;
a liquid impermeable backsheet;
an absorbent core comprising a core wrap enclosing an absorbent material, the absorbent material comprising at least about 80% of superabsorbent polymers (SAP) by weight of the absorbent material; and
an acquisition-distribution system at least partially disposed between the absorbent core and the topsheet and comprising one or more layers; wherein the acquisition-distribution system extends in the longitudinal direction of the absorbent article at least from a point Al disposed at a distance D from the front edge to a point A 2 disposed at the distance D from the back edge of the article, wherein the distance D is equal to about 32% of the length L of the article, and wherein the acquisition-distribution system has a basis weight which is lower at the point A 2 than at the point A 1 ;
wherein the acquisition-distribution system further comprises a first zone Z 1 disposed towards the front end and encompassing point A 1 , and a second zone Z 2 disposed towards the back end and encompassing point A 2 ;
wherein the first zone Z 1 comprises a homogenous basis weight and a surface area of at least 50 cm 2 and the second zone comprises a surface area of at least 10 cm 2 and a homogenous basis weight or a gradually, linearly decreasing basis weight;
wherein the acquisition-distribution system comprises an acquisition layer and a distribution layer, and wherein the acquisition layer is disposed closer to the topsheet than the distribution layer, and
wherein the distribution layer comprises at least about 50% by weight of cross-linked cellulose fibers.

2. The absorbent article of claim 1 , wherein the acquisition-distribution system has a basis weight at least about 20% lower at the point A 2 than at the point A 1 .

3. The absorbent article of claim 1 , wherein the distribution layer is profiled along the longitudinal axis such that the basis weight of the distribution layer at the point A 2 is at least about 20% lower than at the point A 1 .

4. The absorbent article of claim 1 , wherein the acquisition layer comprises a latex-bonded nonwoven.

5. The absorbent article of claim 1 , wherein the caliper of the absorbent article at the point A 2 is at least about 20% lower than the caliper of the absorbent article at the point A 1 , as measured according to the Caliper Test as disclosed in the instant specification.

6. The absorbent article of claim 1 , wherein the acquisition layer is longer than the distribution layer, as measured along the longitudinal axis of the article.

7. The absorbent article of claim 1 , wherein the periphery of the area of the absorbent material within the core wrap defines an absorbent material deposition area, and wherein the acquisition-distribution system does not extend beyond any of the edges of the absorbent material deposition area.

8. The absorbent article of claim 1 , wherein the absorbent core comprises a first absorbent layer and a second absorbent layer, wherein the first absorbent layer comprises a first substrate and a first layer of superabsorbent polymers, wherein the second absorbent layer comprises a second substrate and a second layer of superabsorbent polymers, wherein the absorbent core comprises a fibrous thermoplastic adhesive material at least partially bonding the layers of superabsorbent polymers to their respective substrates, and wherein the first substrate and the second substrate form the core wrap.

9. The absorbent article of claim 1 , wherein the absorbent material of the absorbent core comprises at least 90% of superabsorbent polymers by total weight of the absorbent material.

10. The absorbent article of claim 1 , wherein the absorbent material of the absorbent core comprises less than 10% of natural or synthetic fibers by total weight of the absorbent material.

11. The absorbent article of claim 10 , wherein the absorbent material of the absorbent core is substantially free of natural or synthetic fibers.

12. The absorbent article of claim 1 , wherein the absorbent core comprises at least one channel substantially free of superabsorbent polymers.

13. The absorbent article of claim 12 , wherein the at least one channel comprises a pair of channels symmetrically disposed relative to the longitudinal axis, wherein each of the channels in the pair of channels is at least partially oriented in the longitudinal direction and has a length projected on the longitudinal axis of at least about 10% of the length L of the absorbent article.

Assignees

• Procter & Gamble

Inventors

• Bianchi Ernesto Gabriel
• Schneider Manuela Ines
• Baquer Molas Gemma
• Le Nguyen Huynh-Trang

Classifications

• A61F2013/5307

  characterized by the quantity or ratio of superabsorbent material · CPC title

• A61F2013/5349

  being a tissue-wrapped core · CPC title

• A61F2013/530547

  positioned in a separate layer or layers · CPC title

• A61F13/1565

  by depositing continuous layers of fibrous material between webs, e.g. wrapping layers of fibrous material · CPC title

• A61F13/15642 Primary

  by depositing continuous layers or pads of fibrous material on single sheets or webs · CPC title