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Patents

Absorbent Core Having Swelling Chamber

U.S. Patent No. 11,877,917

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By: Tara Olivo

Associate Editor at Nonwovens Industry, Rodman Media

Bruno Johannes Ehrnsperger, Bad Soden, Germany; Christine Elisabeth Zipf, Lauda-Königshofen, Germany; and Andrea Peri, Kronberg, Germany.
Assigned to The Procter & Gamble Company, Cincinnati, OH.

Filed: 2/25/21
Issued: 1/23/24

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.

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