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US 2004/0166307 A1Published application
Absorbent member with improved fluid handling agent
AssigneeThe Procter & Gamble Company
InventorsMaurizio Tamburro, Nicola D'Alesio, Antonella Pesce, Achille Di Cintio, Giovanni Carlucci, Ardelia Alessandra Tordone
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Abstract
The present invention relates to an absorbent member comprising fine particles of chitosan material, in particular water-soluble chitosan salt, for improved fluid retention and leakage prevention, and a process for making such an absorbent member.
Claims28
An absorbent member having a thickness dimension, a first surface and an opposed second surface, said second surface being separated from said first surface by said thickness dimension,
- said absorbent member being substantially hydrophilic and comprising at least one region with particles of a substantially water-soluble chitosan salt having a particle size distribution with a mean diameter D(v,0.9) of not more than about 300 μm.
Process for making an absorbent member, said process comprising the steps of:
- (a) forming a precursor web having a first and a second surface, said second surface being approximately aligned opposite to said first surface, and
- (b) applying during process step (a) onto at least one surface of said precursor web a solution or dispersion comprising a chitosan material, and/or
- (b′) applying after process step (a) onto at least one surface of said precursor web a solution or dispersion comprising a chitosan material, and
- (c) drying said precursor web, whereby forming at least one region with particles of chitosan material having a particle size distribution with a mean diameter D(v,0.9) of not more than about 300 μm on said surface of said precursor web on which said solution or dispersion of chitosan material was applied in steps (b) and/or (b′),
- wherein said solution or dispersion is applied onto said precursor web in the form of a spray of droplets, said droplets having a droplet size distribution with a mean diameter D(v,0.9) of not more than about 1500 μm.
2 more elements
Dependencies are inferred from the claim text.