Absorbent Barrier Structures Having A High Convective Air Flow Rate And Articles Made Therefrom
Patent #: 7,291,763
Inventor(s): Srinivas Mirle, Mattias Schmidt, John McKibben, Cornelia Sprengard-Eichel and Suna Polat
Company: The Procter and Gamble Company
An absorbent article comprising an absorbent core, a topsheet, an outer cover and an absorbent barrier structure was patented. The absorbent barrier structure has a hydrohead value of at least about 10 mBars, a convective air permeability of at least about 10 Darcy/mm and a liquid impact transmission value of less than about 20 gpsm. The absorbent barrier structure is substantially free of a film and comprises a reservoir zone and a barrier zone at least partially located between the absorbent core and the reservoir zone. The reservoir zone has a porous structure selected from the group consisting of a fibrous web, a fibrous wad, a foam and combinations thereof. The absorbent core is located between the topsheet and the outer cover. The absorbent barrier structure is located between the absorbent core and the outer cover. A combination of the absorbent barrier structure and the outer cover has a hydrohead value of at least about 25 mBars and a convective air permeability of at least about 10 Darcy/mm; a liquid impact transmission value of less than about 20 gpsm; and MVTR of no more than 3500 gpsm/24 hrs.
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