High efficiency absorbent articles for incontinence management

A - Human Necessities – 61 – L

Patent

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Details

A61L 15/22 (2006.01) A61F 5/44 (2006.01) A61F 13/15 (2006.01) A61F 13/56 (2006.01) A61L 15/42 (2006.01)

Patent

CA 2114957

Disclosed are absorbent articles, such as diapers, for the management of incontinence. Such articles utilize in their absorbent cores (50) a fluid acquisition/distribution component (51) and a fluid storage/redistribution component (52) maintained in fluid communication with the acquisition/distribution component. The fluid acquisition/distribution component (51) can be any porous hydrophilic, e.g., fibrous or foam-based material which will provide an initial Fluid Acquisition Rate of at least 2 ml of synthetic urine per second and will also preferably provide a 30-minute Vertical Wicking Height of at least 2 cm. The fluid storage /redistribution component (52) comprises a hydrophilic, flexible, open-celled polymeric foam having a free absorbent capacity of at least about 12 ml of synthetic urine per gram of dry foam and an absorbent capacity under a 5.1 kPa confining pressure which is at least 5 % of this free capacity. Preferred fluid acquisition/distribution component materials comprise chemically stiffened, twisted, curled cellulosic fibers. Preferred fluid storage/redistribution component materials comprise absorbent foams prepared by polymerizing a high internal phase emulsion (HIPE).

On décrit des articles absorbants, tels que des couches, destinés à contrôler l'incontinance. De tels articles utilisent à l'intérieur de deux noyaux absorbants (50) un composant d'acquisition/distribution (51) de fluide et un composant de stockage/redistribution (52) de fluide maintenu en communication fluide avec le composant d'acquisition/distribution de fluide. Le composant d'acquisition/distribution (51) peut être fait de n'importe quelle matière poreuse hydrophile, par exemple une matière fibreuse ou une mousse qui présente un taux d'acquisition de fluide initial d'au moins 2 ml d'urine synthétique par seconde et qui présente également de préférence une hauteur d'absorption et de diffusion par action capillaire d'au moins 2 cm en trente minutes. Le composant de stockage/redistribution (52) de fluide comprend une mousse de polymère souple et hydrophile à cellules ouvertes ayant une capacité absorbante libre d'au moins environ 12 ml d'urine synthétique par gramme de mousse sèche et une capacité absorbante sous une pression de confinement de 5,1 kPa qui est d'au moins 5% de cette capacité libre. Les matériaux composants d'acquisition/distribution de fluide préférés comprennent des fibres cellulosiques raidies, torsadées et ondulées. Les matériaux composants de stockage/redistribution de fluide préférés comprennent des mousses absorbantes préparées par polymérisation d'une émulsion à phase interne élevée.

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