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    Patents

    Absorbent Article with Klemm Gradient and Water Repellent Finishing:

    U.S. Patent No. 9,603,755

    05.31.17
    Masahito Tanaka, Shimotsuke, Japan.
    Assigned to Kao Corporation, Tokyo, Japan.

    Filed: 12/9/13
    Issued: 3/28/17

    An absorbent article sanitary napkin, comprising: a topsheet that forms a skin-facing surface; a backsheet that forms a non-skin-facing surface; an absorbent member that is interposed between the topsheet and the backsheet; the sanitary napkin contains a pair of wings longitudinally extending outward from a pair of lateral side edges of the absorbent member, wherein each of the wings includes a portion of the topsheet and the backsheet; and a target region that is disposed so as to face an excretory part of a wearer when the wearer wears the absorbent article sanitary napkin and that is located between the pair of lateral side edges of the absorbent member, wherein the target region is a region formed between one root and the other root of the wings in the longitudinal direction, wherein the absorbent member is a hydrophilic foam body made of a hydrophobic material subjected to hydrophilic treatment, a plurality of through holes penetrating the absorbent member in a thickness direction are formed at a portion of the absorbent member that is located in the target region, the absorbent member has a layer-stacked structure in which a plurality of layers are stacked in the thickness direction, a ratio of the Klemm water absorption height as measured according to JIS P8141, of a lower layer, which is most proximal to the backsheet, of the layer-stacked structure to that of an upper layer that is most proximal to the topsheet is 2.0 or more, the backsheet is formed of a moisture permeable film that includes a plurality of microvoids, water repellent finishing is performed on a portion, which is located in the target region, of a skin-facing surface of the moisture permeable film, so that water repellent portions are formed, and a ratio of the total area of portions on which the water repellent finishing is performed to the area of the target region is in the range of from 30% to 60%, wherein the absorbent member does not include an absorbent polymer; and its upper and lower layers are bonded to each other and the layers are inseparably integrated with each other.
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    Related Patents

    • Diapers Having a Zoned Non-Attachable Back Sheet and Methods of Manufacturing the Same:

      U.S. Patent No. 9,615,979
      05.31.17

    • Composite Material for Absorbent Article, and Method for Manufacturing Thereof:

      U.S. Patent No. 9,603,756
      05.31.17

    • Absorbent Article Having a Fastening System:

      U.S. Patent No. 9,597,237
      05.31.17


    • Water Absorbent Storage Layers:

      U.S. Patent No. 9,585,798
      05.04.17

    • Apparatus for Manufacturing Stretchable Sheet:

      U.S. Patent No. 9,592,162
      05.04.17

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