IP Library › Granted Patent US 12,491,123
Granted Patent B2
US 12,491,123 · App. 18/592,593 · Granted Dec 9, 2025

Absorbent structure

Inventors: Christopher Philip Bewick-Sonntag (Cincinnati, OH); Clint Adam Morrow (Union, KY); Wade Monroe Hubbard, Jr. (Wyoming, OH)
Assignee: The Procter & Gamble Company
A61F13/84A61F13/15203A61F13/532A61F13/534G01N3/08A61F2013/15308A61F2013/15325A61F2013/1539A61F2013/530007A61F2013/530226A61F2013/530379A61F2013/530817A61F2013/53445A61F2013/8491
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Quick Facts
Patent No.
US 12,491,123
App. No.
18/592,593
Granted
Dec 9, 2025
Kind
B2
Abstract

An absorbent structure comprising one or more absorbent layers wherein the absorbent structure exhibits a first cycle Peak Force compression between about 30 grams and about 150 grams. The absorbent structure further exhibits a fifth cycle dry recovery energy between 0.1 mJ and 2.8 mJ.

Claims (26)

1 . A sanitary napkin, having a longitudinal axis, a lateral axis, and a vertical axis and comprising an absorbent core structure comprising one or more absorbent layers, the one or more absorbent layers comprising a heterogeneous mass, the heterogeneous mass comprising:

a nonwoven web of fibers; and

a plurality of discrete open cell foam pieces polymerized about and enrobing fibers of the nonwoven web,

wherein the heterogeneous mass is present at an intersection of the longitudinal axis and the lateral axis;

wherein the plurality of discrete open cell foam pieces comprise a first group of at least two foam pieces having a first size and a second group of at least two foam pieces having a second size, wherein the first size is greater than the second size, and wherein the plurality of discrete open cell foam pieces are arranged in a profile along the vertical axis such that the first group of foam pieces are positioned outboard of the second group of foam pieces.

2 . The sanitary napkin of claim 1 , wherein the open cell foam pieces comprise one or both of polyurethane foam and HIPE foam.

3 . The sanitary napkin of claim 2 , wherein fibers of the nonwoven web and the open cell foam pieces are integrated.

4 . The sanitary napkin of claim 3 , wherein the heterogeneous mass has undergone solid state formation.

5 . The sanitary napkin of claim 2 , wherein the absorbent core structure comprises superabsorbent polymer.

6 . The sanitary napkin of claim 5 , wherein the absorbent core structure comprises a layer comprising superabsorbent polymer.

7 . The sanitary napkin of claim 6 , wherein the heterogeneous mass overlies the layer comprising superabsorbent polymer.

8 . The sanitary napkin of claim 7 , wherein the nonwoven web of fibers comprises a structure selected from the group consisting of a spunlaced web, a hydroentangled web, a needlepunched web, a spunbond web, a carded fiber web, a meltblown fiber web, a coform web and combinations thereof.

9 . The sanitary napkin of claim 8 , wherein the nonwoven web of fibers comprises fibers selected from the group consisting of cellulose fibers, cotton fibers, wood pulp fibers, rayon fibers, spun synthetic fibers, bicomponent fibers, tricomponent fibers and combinations thereof.

10 . A sanitary napkin, having a longitudinal axis, a lateral axis, and a vertical axis and comprising an absorbent core structure comprising one or more absorbent layers, the one or more absorbent layers comprising a heterogeneous mass, the heterogeneous mass comprising:

a nonwoven web of fibers; and

a plurality of discrete open cell foam pieces polymerized about and enrobing fibers of the nonwoven web,

wherein the heterogeneous mass is present at an intersection of the longitudinal axis and the lateral axis;

wherein the plurality of discrete open cell foam pieces comprise a first group of at least two foam pieces having a first size and a second group of at least two foam pieces having a second size, wherein the first size is greater than the second size, and wherein the plurality of discrete open cell foam pieces are arranged in a profile along the lateral axis such that the second group of foam pieces are positioned outboard of the first group of foam pieces.

11 . The sanitary napkin of claim 10 , wherein the open cell foam pieces comprise one or both of polyurethane foam and HIPE foam.

12 . The sanitary napkin of claim 10 , wherein fibers of the nonwoven web and the open cell foam pieces are integrated.

13 . The sanitary napkin of claim 10 , wherein the heterogeneous mass has undergone solid state formation.

14 . The sanitary napkin of claim 10 , wherein the absorbent core structure comprises superabsorbent polymer.

15 . The sanitary napkin of claim 10 , wherein the absorbent core structure comprises a layer comprising superabsorbent polymer.

16 . The sanitary napkin of claim 15 , wherein the heterogeneous mass overlies the layer comprising superabsorbent polymer.

17 . The sanitary napkin of claim 10 , wherein the nonwoven web of fibers comprises a structure selected from the group consisting of a spunlaced web, a hydroentangled web, a needlepunched web, a spunbond web, a carded fiber web, a meltblown fiber web, a coform web and combinations thereof.

18 . The sanitary napkin of claim 17 , wherein the nonwoven web of fibers comprises fibers selected from the group consisting of cellulose fibers, cotton fibers, wood pulp fibers, rayon fibers, spun synthetic fibers, bicomponent fibers, tricomponent fibers and combinations thereof.

Continuity (4)
Continuation 16863166 · Apr 30, 2020
Continuation 15343989 · Nov 4, 2016
Provisional Application 62251064 · Nov 4, 2015
Related Publication 20240252370A1 · Aug 1, 2024
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