Fluid-absorbent article

US11911249B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Daniel · Waldsee, DE
• Christophe Bauduin · Ludwigshafen, DE
• Katrin Baumann · Mannheim, DE
• Katarzyna Dobrosielska-Oura · Ludwigshafen, DE

Key dates

• Filing date: Jan 29, 2018
• Grant date: Feb 27, 2024
• Expiry date: Dec 18, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2013/530788
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

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.