Absorbent articles with biocompostable properties

A disposable biocompostable absorbent sanitary article, comprising:

• a fluid-permeable top layer;
• a fluid-resistant back layer;
• and
• an absorbent core;
• wherein the fluid-permeable top layer is chemically and/or physically attached to the fluid-resistant back layer;
• wherein the absorbent core is positioned between the fluid-permeable top layer and the fluid-resistant back layer;
• wherein the absorbent core includes a super absorbent polymer (SAP) and absorbent fiber;
• wherein the SAP includes an interior and surface crosslinked, charge modified starch-based modified biopolymer;
• wherein the amylopectin content of the interior and surface crosslinked, charge modified starch-based biopolymer is less than about 80% w/w;
• wherein the interior and surface crosslinked, charge modified starch-based biopolymer is not a graft polymer;
• wherein the interior and surface crosslinked, charge modified starch-based biopolymer includes at least one negatively charged moiety;
• and
• wherein the SAP further includes a second SAP, wherein the second SAP is non-biocompostable, wherein the article includes a blend of the second SAP and the interior and surface crosslinked, charge modified starch-based biopolymer, and wherein between approximately 15% and approximately 40% of the blend is the surface crosslinked, charge modified starch-based biopolymer.

A disposable biocompostable absorbent sanitary article, comprising:

• a fluid-permeable topsheet;
• a fluid-resistant backsheet;
• an acquisition distribution layer;
• and
• an absorbent core;
• wherein the fluid-permeable topsheet is chemically and/or physically attached to the absorbent core, and wherein the absorbent core is chemically and/or physically attached to the fluid-resistant backsheet;
• wherein the absorbent core is positioned between the fluid-permeable topsheet and the fluid-resistant backsheet;
• wherein the absorbent core includes at least cellulose fluff pulp and an integrated super absorbent polymer (SAP);
• wherein the SAP includes an interior and surface crosslinked, charge modified starch-based biopolymer;
• wherein the interior and surface crosslinked, charge modified starch-based biopolymer is biocompostable such that the interior and surface crosslinked, charge modified starch-based biopolymer is operable to exhibit at least 90% degradation within 180 days when compared to a cellulose control;
• wherein the SAP further includes a second SAP, wherein the second SAP is non-biocompostable, wherein the article includes a blend of the second SAP and the interior and surface crosslinked, charge modified starch-based biopolymer, wherein between approximately 15% and approximately 50% of the blend is the surface crosslinked, charge modified starch-based biopolymer;
• wherein the surface crosslinks on the interior and surface crosslinked, charge modified starch-based biopolymer are created through coating an interior crosslinked starch-based biopolymer with one or more crosslinkers and thermally treating the coated interior crosslinked starch-based biopolymer;
• and
• wherein the interior and surface crosslinked, charge modified starch-based biopolymer includes at least one negatively charged moiety.

A disposable biocompostable absorbent sanitary article, comprising:

• a fluid-permeable top layer;
• a fluid-resistant back layer;
• and
• an absorbent core including a super absorbent polymer (SAP);
• wherein the fluid-permeable top layer is chemically and/or physically attached to the absorbent core, wherein the absorbent core is chemically and/or physically attached to the fluid-resistant back layer;
• wherein the absorbent core is positioned between the fluid-permeable top layer and the fluid-resistant back layer;
• wherein the SAP includes an interior and surface crosslinked, charge modified starch-based biopolymer and a second SAP, wherein the second SAP is non-biocompostable and is physically blended with the interior and surface crosslinked, charge-modified starch-based biopolymer to create a blend of the interior and surface crosslinked, charge modified starch-based biopolymer and the second SAP;
• wherein the interior and surface crosslinked, charge modified starch-based biopolymer is biocompostable such that the interior and surface crosslinked, charge modified starch-based biopolymer is operable to exhibit at least 90% degradation within 180 days when compared to a cellulose control;
• and
• wherein the article has an acquisition time under load (ATUL) of between 60 seconds and 80 seconds for a first dose of 80 milliliters of 0.9% wt saline, an ATUL of between 85 and 105 seconds for a second dose of 80 milliliters of 0.9% wt saline, and an ATUL of between 155 and 205 seconds for a third dose of 80 milliliters of 0.9% wt saline, thereby yielding a first average acquisition rate of between 1.000 milliliter/second and 1.333 milliliters/second, a second average acquisition rate of between 0.7619 milliliters/second and 0.9411 milliliters/second, and a third average acquisition rate of between 0.3902 milliliters/second and 0.5161 milliliters/second.