Absorbent structures with coated water-absorbing material
AssigneeThe Procter & Gamble Company
InventorsKarl Haeberle, Klaus Dieter Hoerner, Axel Meyer, Carolyn Ann Spitzmueller, Robin Lynn McKiernan
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Abstract
Absorbent structures, and absorbent articles with such structures, comprising water-absorbing polymer having a coating of film-forming polyurethane and therein incorporated a hydrophilic silica.
Claims32
An absorbent structure comprising a water-absorbing material containing coated water-absorbing polymer particles, the absorbent structure being suitable for absorption and retention of bodily fluids, and being produced by a process comprising the steps of:
- a) coating water-absorbing polymer particles with an aqueous composition comprising a film-forming polyurethane and pyrogenic silica in a weight ratio from about 1:1 to about 1:4;
- and
- b) heat-treating the coated particles at above 50° C.
An absorbent structure comprising a water-absorbing material containing water-absorbing polymer particles, coated with a film-coating of a film-forming polyurethane and pyrogenic silica, incorporated in said polyurethane film coating, in a weight ratio from about 1:1 to about 1:4, the absorbent structure being suitable for absorption and retention of bodily fluids.
Dependencies are inferred from the claim text.