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US 8,796,174 B2Granted
Fluid-absorbent articles
AssigneeBASF SE
InventorsMatthias Weismantel, Rüdiger Funk, Ulrich Schröder, Marco Krüger, Sylvia Bertha, John Joseph Louden
Life of this patent
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Abstract
The present invention relates to a process for producing fluid-absorbent cores, comprising mixing a fibrous material and fluid-absorbent polymer particles having low moisture content and low apparent density and pressing the obtained mixture under specific conditions.
Claims18
A process for preparing a fluid-absorbent core, comprising
- (i) mixing of a fibrous material and 10 to 95% by weight of fluid-absorbent polymer particles having a particle size of less than 1000 μm, a median particle size of 200 to 600 μm, a moisture content of at least 8% by weight and less than 20% by weight, a mean sphericity of at least 0.84 and a floating particle fraction (FPF) of at least 10%, and
- (ii) pressing the obtained mixture,
- wherein the pressing (ii) is performed that the core (C) has a density of
- 1·D<β×0.14 g/cm3+0.18 g/cm3
- wherein D is the density of the core (C) and β is the weight fraction of fluid-absorbent polymer particles in the core (C).
2 more elements
A process for preparing a fluid-absorbent core, comprising
- (i) mixing of a synthetic fibrous material and 10 to 95% by weight of fluid-absorbent polymer particles having a particle size of less than 1000 μm, a medium particle size of 200 to 600 μm, a moisture content of less than 20% by weight, a mean sphericity of at least 0.84 and a floating particle fraction (FPF) of at least 10%, and
- (ii) pressing the obtained mixture,
- wherein the pressing (ii) is performed that the core (C) has a density of
- 1·D<β×0.14 g/cm3+0.18 g/cm3
- wherein D is the density of the core (C) and β is the weight fraction of fluid-absorbent polymer particles in the core (C).
2 more elements
Dependencies are inferred from the claim text.