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U.S. Patent No. 12,059,334
October 31, 2024
By: Tara Olivo
Associate Editor at Nonwovens Industry
Ryan Nicholas Chan, Raleigh, NC; Gordon Sidney Cox, Durham, NC; Hailey Katherine Davis, Raleigh, NC; and Vladimiro Nettel, Kirkland, Canada. Assigned to Tethis, Inc., Raleigh, NC Filed: 9/30/20 Issued: 8/13/24 An absorbent sanitary article, comprising: a fluid-permeable top layer; a fluid-resistant back layer; and an absorbent core; wherein the absorbent core includes an absorbent fiber and a superabsorbent polymer (SAP); wherein the SAP includes a charge modified starch-based biopolymer; wherein the charge modified starch-based biopolymer is biocompostable or biodegradable; wherein the charge modified starch-based biopolymer has a Centrifuge Retention Capacity (CRC) of at least 17 g/g and an Absorbency Under Load (AUL) of at least 7 g/g at 0.7 psi in a saline solution; and wherein the SAP further comprises a polyacrylic synthetic superabsorbent material, wherein the polyacrylic synthetic superabsorbent material and the charge modified starch-based biopolymer are not chemically linked.
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