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Patents

Absorbent Core Having Funnel-Shaped Swelling Chamber:

U.S. Patent No. 10,966,884

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By: Karen McIntyre

Editor, Nonwovens Industry

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

Filed: 6/30/17
Issued: 4/6/21

An absorbent core comprising an absorbent material enclosed in a core wrap, wherein the core wrap which comprises a liquid permeable substrate layer and the absorbent material comprises from about 87% to about 100% of superabsorbent polymer by weight of the absorbent material, the core further comprising a funnel-shaped swelling chamber disposed in between two external zones; wherein: permanent seals separate the funnel-shaped chamber from each of the two external zones; the funnel-shaped 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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