Absorbent article and distribution material

Patent metadata

Field	Value
Publication number	US-2016136012-A1
Application number	US-201514943044-A
Country	US
Kind code	A1
Filing date	Nov 17, 2015
Priority date	Nov 18, 2014
Publication date	May 19, 2016
Grant date	—

Abstract

An absorbent article comprises a liquid permeable topsheet, a liquid impermeable backsheet, an absorbent core between the topsheet and the backsheet. The absorbent core comprises an absorbent material. The absorbent article further comprises a distribution material between the topsheet and the absorbent core. The distribution material is notionally divided in a front region, a back region and a middle region located between the front and the back region. Each of the front, back and middle regions is ⅓ of the length of the distribution material. At least one of the front, back and middle regions of the distribution material comprises one or more layers. The one or more layers of the distribution material comprise a fibrous structure made of wet-laid fibers.

First claim

What is claimed is:

1 . An absorbent article for personal hygiene comprising a liquid permeable topsheet,
a liquid impermeable backsheet, an absorbent core between the topsheet and the backsheet, the absorbent core comprising an absorbent material, a distribution material between the topsheet and the absorbent core wherein the distribution material is notionally divided in a front region, a back region and a middle region located between the front and the back region, wherein each of the front, back and middle region is about ⅓ of the length of the distribution material, wherein at least one of the front, back and middle region of the distribution material comprises one or more layers, and wherein the one or more layers of the distribution material comprises a fibrous structure made of wet-laid fibers, wherein the one or more layers of the distribution material exhibit a Wet Burst Strength from about 50 to about 500 g according to the Wet Burst Strength Test Method, and wherein at least one of the one or more layers of the distribution material have a dry caliper at a pressure of 2.06 kPa from about 0.1 mm to about 1.0 mm and the one or more layers of the distribution material have a total dry caliper at a pressure of 2.06 kPa from about 1.0 mm to about 30.0 mm according to Dry Caliper measurement Test Method.

2 . The absorbent article of claim 1 wherein each layer of the one or more layers of the distribution material exhibits a basis weight from 10 to 200 gsm.

3 . The absorbent article of claim 1 wherein at least in the middle region of the distribution material, the distribution material comprises from 2 to 10 layers, and wherein the middle region of the distribution material has an overall basis weight from about 50 to about 250 gsm.

4 . The absorbent article of claim 1 wherein the one or more layers of the distribution material do not comprise air-laid fibers.

5 . The absorbent article of claim 1 wherein the one or more layers of the distribution material comprises a pattern of raised elements.

6 . The absorbent article of claim 5 wherein the raised elements of the pattern of raised elements protrude from the one or more layers of the distribution material towards the topsheet and/or the raised elements of the pattern of raised elements protrude from the one or more layers of the distribution material towards the absorbent core.

7 . The absorbent article of claim 3 wherein only the middle region of the distribution material comprises from 2 to 10 layers.

8 . The absorbent article of claim 3 wherein further to the middle region, the front and/or back region or a portion of the front and/or back region of the distribution material comprises from 2 to 10 layers, and the front and/or back region of the distribution material has an overall basis weight from about 50 to about 250 gsm and a total dry caliper at a pressure of 2.06 kPa from about 1.0 mm to about 30.0 mm according to Dry Caliper measurement Test Method.

9 . The absorbent article of claim 1 wherein the absorbent material comprises from about 80% to about 100% of superabsorbent polymers by total weight of the absorbent material.

10 . The absorbent article of claim 1 wherein the distribution material has a permeability of at least about 150 Darcy according to In Plane Radial Permeability Test Method and a Fixed Height Saturation at about 5 cm above about 40% according to the Fixed Height Saturation Test Method.

11 . The absorbent article of claim 1 wherein the one or more layers of the distribution material have a ratio of wet/dry caliper at 2.06 kPa of at least about 0.5.

12 . The absorbent article of claim 1 wherein the one or more layers of the distribution material have a ratio of dry caliper at 4.82 kPa/2.06 kPa of at least about 0.5.

13 . The absorbent article of claim 1 wherein a portion of the distribution material comprises from 2 to 10 layers which are formed by folding the portion of the distribution material over itself.

14 . The absorbent article of claim 13 wherein the portion of the distribution material comprises at least one sheet of the fibrous structure which is C or S-folded to form at least some of the respective 2 to 10 layers.

15 . The absorbent article of claim 13 wherein the portion of the distribution material comprises a sheet of the fibrous structure of the distribution material which is notionally divided into a first, second and third portion, wherein the first portion of the sheet of the fibrous structure is folded onto the second portion and the third portion of the sheet of the fibrous structure is folded onto the folded first portion to form a trifolded sheet of the fibrous structure, each of the first, second and third portions forming one of the layers of the distribution material.

16 . The absorbent article of claim 1 wherein a top portion of the distribution material is attached to the topsheet or to any layer between the topsheet and the distribution material by a first pattern of adhesive, and wherein a bottom portion of the distribution material is attached to a substrate of the absorbent core facing the topsheet or to any layer between the substrate of the absorbent core facing the topsheet and the distribution material by a second pattern of adhesive.

17 . The absorbent article of claim 1 wherein the distribution material comprises from 2 to 10 layers and wherein each layer of the distribution material is attached to each adjacent layer by a pattern of adhesive.

18 . The absorbent article of claim 1 wherein the wet-laid fibers of the fibrous structure comprise one or more cationic wet strength resins selected from the group consisting of a base activated epoxide polyamide epichlorohydrin resin, an urea-formaldehyde resin, a melamine formaldehyde resin, a polyamide-epichlorohydrin resin, a polyethyleneimine resin, a polyacrylamide resin, a dialdehyde starch and mixtures thereof.

19 . The absorbent article of claim 1 wherein the distribution material comprises longitudinal side edges and wherein said longitudinal side edges are incrementally stretched, slitted or cut.

20 . The absorbent article of claim 1 wherein a portion of the distribution material is printed and/or embossed.

Assignees

• Procter & Gamble

Inventors

• Peri Andrea
• Hamall Kenneth Michael
• Chatterjee Aniruddha
• Endres Joerg
• Schmidt Mattias
• Sautter Sandra
• Huang Gene Xiaoqing
• Brown Darrell Ian
• Ostendorf Ward William
• Grolmes Joseph Leslie

Classifications

• A61F2013/530437

  having a part with elevated absorption means · CPC title

• A61F13/53717

  the layer having a promotional function on liquid propagation in the horizontal direction · CPC title

• A61F13/535 Primary

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

• A61F2013/53786

  with folds · CPC title

• A61F13/53409

  having a folded core · CPC title