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US 11,911,249 B2Granted
Fluid-absorbent article
AssigneeBASF SE
InventorsThomas Daniel, Christophe Bauduin, Katrin Baumann, Katarzyna Dobrosielska-Oura
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AssigneeBASF SE
InventorsThomas Daniel, Christophe Bauduin, Katrin Baumann, Katarzyna Dobrosielska-Oura
Estimating the term…
Provided herein are fluid-absorbent articles, fluid absorbent cores, and fluid-absorbent mixtures with improved properties, especially rewet performance and liquid acquisition. The fluid-absorbent article includes (A) an upper liquid-pervious sheet, (B) a lower liquid-impervious sheet, (C) a fluid-absorbent core including from 60 to 20% by weight fibrous material and from 40 to 80% by weight of at least a first type of water-absorbent polymer particles, (G) and at least a second type of water-absorbent polymer particles (H) based on the sum of water-absorbent polymer particles and fibrous material, (D) an optional acquisition-distribution layer (D) between (A) and (C), (F) other optional components, wherein the first type of water absorbent polymer particles (G) of the fluid-absorbent core (C) have a SFC of at least 20×10−7 cm3·s/g, and wherein the at least second type of water-absorbent polymer particles (H) of the fluid-absorbent core have a sphericity of at least 0.80.
A fluid absorbent article, comprising
A fluid-absorbent core (C), comprising from 60 to 20% by weight fibrous material and from 40 to 80% by weight of water-absorbent polymer particles comprising at least a first type of water-absorbent polymer particles (G) and at least a second type of water-absorbent polymer particles (H) based on the sum of water-absorbent polymer particles and fibrous material, wherein the first type of water absorbent polymer particles (G) of the fluid-absorbent core (C) have a SFC of at least 20×10−7 cm3·s/g and wherein the second type of water-absorbent polymer particles (H) of the fluid-absorbent core (C) have a sphericity of at least 0.80, and wherein the first type of water-absorbent polymer particles (G) is present of at least 30% by weight within the fluid-absorbent core (C) and is present of at maximum 70% by weight within the fluid-absorbent core (C) based on the sum of water-absorbent polymer particles (G, H), and wherein the second type of water-absorbent polymer particles (H) is present of at least 30% by weight within the fluid-absorbent core (C) and is present of at maximum 70% by weight within the fluid-absorbent core (C) based on the sum of water-absorbent polymer particles (G, H).
A fluid-absorbent mixture comprising a first type of water-absorbent polymer particles (G) with a SFC of at least 20×10−7 cm3·s/g, and a second type of water-absorbent polymer particles (H) with a sphericity of at least 0.80, wherein the second type of water-absorbent polymer particles (H) has a SFC at maximum of 15×10−7 cm3·s/g;
Dependencies are inferred from the claim text.