Enhanced core utilization in absorbent products

A - Human Necessities – 61 – F

Patent

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Details

A61F 13/15 (2006.01) A61F 5/44 (2006.01) B32B 5/08 (2006.01) A61F 13/56 (2006.01) A61F 13/48 (1990.01)

Patent

CA 2079134

A core component for use in a fluid-absorbing article, such as a diaper, incontinence pad, catamenial device or the like is described, which core component has a plurality of core zones comprising a zone of vulnerability positioned in said core component for maximum potential exposure to wetting, and at least one additionalcore zone arranged in an area of reduced potential exposure to initial wetting and in direct or indirect fluid receivable relation from the zone of vulnerability. The zone of vulnerability has a wadding component comprising synthetic fiber of filament and has a greater average pore size than the average pore size of the wadding component in the at least one additional core zone. When two or more additional core zones are used, the average fractional value of fiber volume-to-fiber surface area and the average pore size within the wadding components of the additional core zones decrease invalue from zone to zone with increased distance from the zone of vulnerability and with reduced risk of initial wetting. The zone of vulnerability may be further characterized by having a greater average liquid-solid contact angle than the average liquid-solid contact angle in the additional core zones. A fluid absorbing article and a method for increasing fluid receptivity, fluid storage efficiency, and reduced rewet characteristics utilizing the core component of the invention are also described.

Composant principal à utiliser dans un article absorbant les fluides, tel qu'une couche, un coussinet d'incontinence, un dispositif cataménial ou un autre article semblable. Le composant principal contient plusieurs zones centrales comprenant une zone de vulnérabilité placée dans le composant principal en question pour une exposition potentielle maximale au mouillage, et au moins une zone centrale additionnelle placée dans une aire d'exposition potentielle réduite au mouillage initial et pouvant recevoir directement ou indirectement des fluides de la zone de vulnérabilité. La zone de vulnérabilité comporte un composant d'ouate fait de fibres synthétiques en filaments, et la dimension moyenne de ses pores est plus grande que la dimension moyenne des pores du composant d'ouate de la zone centrale additionnelle. Lorsque deux ou plusieurs zones centrales additionnelles sont utilisées, la valeur fractionnaire moyenne du volume de fibre par rapport à la surface de fibre et la dimension moyenne des pores du composant d'ouate des zones centrales additionnelles diminue en valeur d'une zone à l'autre au même rythme que la distance de la zone de vulnérabilité et que le risque potentiel de mouillage initial. La zone de vulnérabilité peut être encore plus caractérisée en ayant un plus grand angle de contact moyen liquides-solides que l'angle de contact moyen liquides-solides dans les zones centrales additionnelles. L'invention porte également sur un article absorbant les fluides et une méthode pour augmenter la réception des fluides, l'efficacité de l'entreposage des fluides et les caractéristiques réduites de remouillage, en utilisant le composant principal de l'invention.

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