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Disposable diaper

  • US 7,722,587 B2
  • Filed: 08/13/2004
  • Issued: 05/25/2010
  • Est. Priority Date: 08/14/2003
  • Status: Expired due to Fees
First Claim
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1. A disposable diaper, comprising:

  • a chassis;

    at least one crossover member; and

    a body fluid absorbent structure having opposite inner and outer surfaces;

    said chassis havinga back-and-forth direction, and a width direction orthogonal to the back-and-forth direction,a front waist region, a rear waist region and a crotch region extending in the back-and-forth direction between the front and rear waist regions, andan inner surface adapted to face a wearer'"'"'s skin, in use, and an outer surface adapted to face away from the wearer'"'"'s skin, in use;

    said absorbent structure comprisinga body fluid absorbent panel lying on said inner surface of said chassis so as to extend in at least said crotch region, anda liquid-pervious sheet covering a surface of said absorbent panel adapted to face the wearer'"'"'s skin, in use, and defining at least said inner surface of said absorbent structure;

    said absorbent structure being dimensioned in said crotch region to be narrower than said crotch region and having a pair of side edge portions extending in said back-and-forth direction and front and rear end portions extending in said width direction;

    on the side adapted to face said wearer'"'"'s skin, in use, said liquid-pervious sheet being opposed to said at least one crossover member that extends across said absorbent structure above said absorbent structure in said width direction and has a length in a range of 5 to 250 mm as measured in said back-and-forth direction; and

    said crossover member comprising, in the width direction,transversely opposite end portions bonded to said diaper in a vicinity of and along said side edge portions of said absorbent structure, andan intermediate portion defined between said transversely opposite end portions and free of direct bonding to the diaper, said intermediate portion being deformable so as to become convex from said outer surface toward said inner surface as said chassis and said absorbent structure are deformed in said crotch region so as to become convex from said inner surface toward said outer surface and to reduce respective widths of said chassis and absorbent structure;

    whereinsaid crossover member is free of absorbent material;

    said diaper comprises a pair of said crossover members being adjacent to each other in said back-and-forth direction, located in a vicinity of an area adapted to correspond to the wearer'"'"'s anus, in use, and entirely spaced apart from each other in said back-and-forth direction by a spacing in a range of 10 to 150 mm to define a passage for excrement discharged by the wearer to pass through the spacing defined between said adjacent crossover members;

    said diaper further comprises a pair of leak-barrier cuffs located, in the width direction, outboard of and extending, in the back-and-forth direction, along the side edge portions of said absorbent structure;

    said crossover member is free of direct attachment to the leak-barrier cuffs; and

    said outer surface of said absorbent structure has, between said side edge portions and between said front and rear end portions, an intermediate zone directly bonded to the inner surface of said chassis, whereas the side edge portions on opposite sides of said intermediate zone are free of direct attachment to said chassis.

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