11.08.21
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: 1/15/21
Issued: 8/17/21
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 a biobased carbon content of the charge modified starch-based biopolymer is at least approximately 80%; wherein the charge modified starch-based biopolymer has a Centrifuge Retention Capacity (CRC) of at least 17 g/g, an Absorbency Under Load (AUL) of at least 7 g/g at 0.7 psi, and a Free Swell Capacity (FSC) of at least 30 g/g in a saline solution; and wherein the charge modified starch-based biopolymer exhibits no cytotoxicity and is not a dermal irritant.
Assigned to Tethis, Inc., Raleigh, NC.
Filed: 1/15/21
Issued: 8/17/21
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 a biobased carbon content of the charge modified starch-based biopolymer is at least approximately 80%; wherein the charge modified starch-based biopolymer has a Centrifuge Retention Capacity (CRC) of at least 17 g/g, an Absorbency Under Load (AUL) of at least 7 g/g at 0.7 psi, and a Free Swell Capacity (FSC) of at least 30 g/g in a saline solution; and wherein the charge modified starch-based biopolymer exhibits no cytotoxicity and is not a dermal irritant.