Patents Assigned to Sanyo Chemcial Industries, Ltd.
  • Patent number: 5986166
    Abstract: An absorbent product comprising a liquid permeable surface sheet, a liquid nonpermeable back sheet and an absorbent layer located therebetween, wherein the absorbent layer comprises a water nonswellable synthetic fiber (a) and optionally cellulose fiber (b), and a water-absorbent resin (c), with the weight ratio of (a):(b) being (100 to 20):(0 to 80) and the percentage content of (c) based on the weight sum of (a), (b) and (c) is 25 to 75 weight %. The absorbent layer is treated with polyoxyalkylene-modified silicone surface active agent (d1) and/or a nonsilicone surface active agent having HLB of 8 to 14 (d2). Absorbent products of the present invention exhibit excellent shape retention in the moist state and good permeability and diffusibility for the absorbed liquid. Accordingly, they provide excellent surface dryness, reduced leakage and thus can be comfortably used for a long time and effectively applied to disposable diapers, sanitary napkins and incontinence pads.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: November 16, 1999
    Assignee: Sanyo Chemcial Industries, Ltd.
    Inventors: Shingo Mukaida, Kazuhiko Iguchi, Kenji Tanaka