US 11,877,917 B2
Absorbent core having swelling chamber
Bruno Johannes Ehrnsperger, Bad Soden (DE); Christine Elisabeth Zipf, Lauda-Königshofen (DE); and Andrea Peri, Kronberg (DE)
Assigned to The Procter & Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Feb. 25, 2021, as Appl. No. 17/184,827.
Application 17/184,827 is a continuation of application No. 15/639,314, filed on Jun. 30, 2017, granted, now 10,966,884.
Claims priority of provisional application 62/402,398, filed on Sep. 30, 2016.
Claims priority of provisional application 62/358,186, filed on Jul. 5, 2016.
Prior Publication US 2021/0196531 A1, Jul. 1, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 13/534 (2006.01); A61F 13/53 (2006.01); A61F 13/15 (2006.01); A61F 13/49 (2006.01); A61F 13/539 (2006.01)
CPC A61F 13/534 (2013.01) [A61F 13/15203 (2013.01); A61F 13/49017 (2013.01); A61F 13/53 (2013.01); A61F 13/539 (2013.01); A61F 2013/15406 (2013.01); A61F 2013/15463 (2013.01); A61F 2013/5349 (2013.01); A61F 2013/530481 (2013.01); A61F 2013/53933 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An absorbent article comprising a liquid permeable topsheet, a liquid impermeable backsheet, an absorbent core being disposed between the topsheet and the backsheet, wherein the absorbent core comprises:
an absorbent material disposed in an absorbent deposition area and enclosed in a core wrap; and
a swelling chamber disposed in between two external zones;
wherein:
the absorbent material comprises superabsorbent polymer;
one or more permanent seals separate the chamber from each of the two external zones;
the swelling chamber consists of absorbent material immobilized by water-responsive bonds, wherein said water-responsive bonds deteriorate upon exposure to water such that the absorbent material is flowable in the wet state; and
the two external zones comprise absorbent material that is immobilized by thermoplastic adhesive, such that the absorbent material is immobilized in the wet state.