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Publication Date: 2004-Dec-23
Document File: 3 page(s) / 67K

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Absorbent products such as feminine hygience articles may have wettable ruffled ridges that serve as barriers to prevent leakage.

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    Various absorbent articles such as sanitary napkins, incontinence pads, disposable diapers and others have heretofore been developed and known. These absorbent articles typically comprise a liquid-impermeable back surface, a liquid-permeable top surface, and an absorbent core between the top surface and the back surface. These surfaces typically are separate components such as a topsheet and backsheet. The prior art teaches numerous variations in addition to this typical construction. One of these variations is the addition of side barriers.

    Side barriers are typically added to prevent leakage from the sides. The side barriers could be a separate component attached to absorbent article or could be integral with one of the other components of the absorbent article. An example of incorporating an already existing component with a side barrier is including the topsheet into the barriers as illustrated in US 6,171,290. Another example of incorporating an already existing component is including the peripheral seal as illustrated in US 4,770,657.

    In these configurations the barriers have a base connected to the remaining absorbent article, a free edge, and portion between the base and free edge. Typically, the base of the barriers run the longitudinal length of the absorbent article and consist of one or more pairs of barriers separated transversely across the width of the absorbent article.

    The construction of the barrier may be one or more sheets of material as illustrated in US 6,616,644, one or more loops of material as illustrated in EP 1 132 069, one or more horizontal pleats of material as illustrated in US 6,293,934, or one or more vertical pleats or gathers of material as illustrated in US 6371948. The side barrier could be placed adjacent other side barrier features such as a groove as illustrated in EP 1 132 069.

    The materials used in these constructions may be a laminate of one or more fibrous materials such as a nonwoven, one or more films, or a combination of a fibrous material and film. Typically, the material is hydrophobic to better provide a barrier to fluid movement.


    This design which is known as a ridge combines the barrier function discussed earlier with a feature that aids in the removal of fluid from the body. The feature consists of a ridge on the body side surface of the absorbent article that is both wettable and transversely ruffled. The wettable aspect of the ridge aids in the rapid removal of fluid from the body, while the ruffled aspect in addition to aiding in removal also slows the progress of sideways movement of fluid from the absorbent article. Although the ruffles generally run longitudinally, they may have a transverse component. The general contour of the base of the ridge could be either linear or nonlinear. The ruffling of the ridge may also assist

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in keeping the ridge vertical. The ruffling of the ridge may be const...