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Patents

Disposable absorbent articles having low rewet and a reduced evaporation

By: Tim Wright

Editor-in-Chief, Contract Pharma

US Patent No.: 8,653,323 B2
Inventor(s): Mattias Schmidt, Idstein, Germany); Cornelia Sprengard-Eichel, Frankfurt, Germany; and Bruno Johannes Ehrnsperger, Bad Soden, Germany.
Company: The Procter & Gamble Company, Cincinnati, OH, US.
Filed: 9/27/10
Issued: 2/18/14

An absorbent article comprising a topsheet, a backsheet, and an absorbent core interposed between said topsheet and said backsheet, said absorbent article having a periphery, said topsheet and said backsheet extending laterally and longitudinally beyond said absorbent core, thereby surrounding said absorbent core and forming said periphery of said absorbent article, said absorbent core comprising a liquid storage region and a liquid acquisition/distribution region positioned between said liquid storage region and said topsheet, said acquisition/distribution region comprising a first acquisition/distribution layer and a second acquisition/distribution layer with a liquid permeable evaporation barrier layer disposed between said first and said second acquisition/distribution layers, said second acquisition/distribution layer being positioned between the liquid storage region and the evaporation barrier, said barrier layer comprising a three-dimensionally structured formed film material including a first plurality of apertures having individual open areas of more than about 1.4 mm2 and less than about 3.0 mm2 and a second plurality of apertures having a mean aperture size smaller than a mean aperture size of said first plurality of apertures, wherein said article provides an area specific evaporation rate of less than 150 g/m2/hr when submitted to the disclosed Evaporation Rate test.

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