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Patents

Absorbent Core for Use in Absorbent Articles:

U.S. Patent No. 10,716,713

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By: Karen McIntyre

Editor, Nonwovens Industry

Birgit Wirtz, Cologne, Germany; Walter Pieter Hendrik Laurentius Van Der Klugt, Mechernich, Germany; Rodrigo Rosati, Frankfurt, Germany; Ernesto G. Bianchi, Oberursel, Germany; Aniruddha Chatterjee, Kelkheim, Germany; Carsten Heinrich Kreuzer, Hofheim, Germany; and Holger Beruda, Schwalbach am Taunus, Germany.
Assigned to The Procter & Gamble Company, Cincinnati, OH.

Filed: 9/15/16
Issued: 7/21/20

A method for making an absorbent core, the method comprising the steps of: depositing a layer of first superabsorbent polymer particles on a first substrate in a manner to define: a plurality of land areas where the first superabsorbent polymer particles are present, a plurality of junction areas that are substantially free of the first superabsorbent polymer particles, and a first channel extending generally parallel to a longitudinal centerline of the core; wherein the plurality of land areas form transversally oriented bars extending generally parallel to a transversal centerline; wherein the transversally oriented bars are separated by the junction areas; wherein the first channel is free of the first superabsorbent particles; wherein the first channel is defined by continuous side wall portions bonded to the first substrate; and
wherein the longitudinal centerline of the core is perpendicular to the transversal centerline of the core; forming a first absorbent layer by depositing on the layer of first superabsorbent polymer particles a thermoplastic adhesive material in fibrous form to form a fibrous layer of thermoplastic adhesive material applied over the layer of first superabsorbent polymer particles; forming a second absorbent layer by depositing a homogenous mixed layer comprising second superabsorbent polymer particles and cellulosic fibers on an inner surface of a second substrate, wherein the homogenous mixed layer is continuously distributed at a generally constant basis weight; combining together the first absorbent layer and the second absorbent layer so that at least a portion of the fibrous thermoplastic adhesive material of the first absorbent layer contacts at least a portion of the mixed layer of the second absorbent layer; folding the first substrate around longitudinal side edges of the first and second absorbent layers; and attaching the first substrate to an outer surface of the second substrate to form a C-wrap.

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