Unicharm Corporation

Toshiya Yago

Naoto Ohashi

Makoto Suekane

Hiroki Ishikawa

Keiko Ichihara

A disposable wearing article adapted to prevent indicators from being transferred to a liquid-absorbent structure and to make the indicators develop the color reaction quickly in response to a discharge of body exudates. A disposable diaper has a topsheet, a backsheet and a liquid-absorbent structure interposed between these top- and backsheets. A surface of a first backsheet facing the liquid-absorbent structure is formed with indicators. The indicators contain a hot-melt polymer, an indicator agent adapted to develop a color reaction and a plasticizing oil. The liquid-absorbent structure has a liquid-absorbent core, a liquid-diffusive wrapping sheet adapted to wrap the core. A hydrophilic bottom sheet is interposed between a bottom surface of the core and a bottom surface region of the wrapping sheet. A dimension in the transverse direction of the bottom sheet is larger than a dimension of a region in which the indicators are formed and smaller than a dimension in the transverse direction of the core.

Disposable wearing article

A disposable diaper includes a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorber between the top sheet and back sheet, and having a front body waist region, a crotch region and a back body waist region. The top sheet is a nonwoven fabric having on the skin contact surface a plurality of ridges and a plurality of recesses extending in the lengthwise direction of the disposable diaper, and alternating in the widthwise direction perpendicular to the lengthwise direction. The top sheet has point-like compressed sections at a prescribed density in the front body waist region and/or back body waist region, the ridges in prescribed zones having different heights than the adjacent ridges at the same location in the lengthwise direction.

Disposable diaper having excellent migration speed and satisfactory feeling

A disposable wearing article improved so that leakage of body waste can be prevented, a change in color which might develop in an unused state of the wearing article can be inhibited and actually discharged body exudates can immediately cause an indicator to develop a change of color. A disposable diaper includes a topsheet, a backsheet and a liquid-absorbent structure interposed between these top- and backsheets. The backsheet includes first and second backsheets and the first backsheet is formed on its side facing the liquid-absorbent structure with an indicator adapted to develop a color reaction when the indicator comes in contact with at least one of moisture and body exudates. A plurality of such indicators is arranged to extend in a longitudinal direction and to be spaced apart from each other in a transverse direction. The liquid-absorbent structure includes a liquid-absorbent core and a wrapping sheet adapted to wrap the core. A bottom sheet as a hydrophobic bottom element is interposed between a bottom surface of the core and a bottom region of the wrapping sheet as a hydrophobic bottom element.

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Kagawa, Japan

Toshiya Yago