Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1997-06-18
1999-06-29
Polutta, Mark O.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604389, 604386, 428343, 428100, 24442, A61F 1315
Patent
active
059162074
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a disposable diaper and more particularly to a disposable diaper having a novel fastening tape efficient in productivity.
BACKGROUND ART
Disposable diapers often have a means for gathering up at the waist to improve a fit of the waist opening portion while worn, such as fastening tapes made of an elastic member (see Japanese Patent Publication No. 7-61351 and Japanese Utility Model Publication No. 4-10817) or an elastic member that is provided at the rear waist portion.
In order to gather at the waist by the above-mentioned conventional means, an elastic member having elasticity must be fixed at a prescribed position of a diaper with a necessary step of stretching the elastic member in a series of a production system. Therefore the elastic member cannot be transported, fixed, and assembled into a diaper in the same manner as other members, which has caused poor productivity. Further, a complicated processing step is involved which increases cost.
Japanese Patent Laid-Open No. 7-231913 discloses a porous sheet in which areas having no elasticity but moisture permeability alternate with areas having no moisture permeability but elasticity. The publication further discloses the use of the porous sheet in absorbent articles, for example, as a back sheet of a disposable diaper. However, the publication neither discloses nor suggests use of the porous sheet as a fastening tape for diapers.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a disposable diaper that can be gathered at the waist without reducing productivity or involving a complicated processing step.
As a result of extensive study, it has been found that the above object is accomplished by designing a fastening tape so as to reveal elasticity on pulling to its longitudinal direction.
The present invention has been completed based on this finding. The invention provides a disposable diaper which comprises a liquid permeable topsheet, a liquid impermeable back sheet, and an absorbent member interposed between the topsheet and the back sheet, and has a structure to form, when worn, a front waist body portion, a rear waist body portion and a crotch portion, the rear waist body portion having at each side thereof a fastening tape for fastening the diaper, wherein the fastening tape is designed to reveal elasticity on being pulled in the longitudinal direction thereof.
The invention provides the above-described disposable diaper, wherein the fastening tape has a tip portion having a first fastening means provided on one surface side thereof, a central portion which reveals elasticity on being pulled in the longitudinal direction of the tape, and a fixed portion which is fixed at the rear waist body portion, and the back sheet is provided with a second fastening means on the surface side thereof so that the diaper may be removably fastened by binding the first fastening means and the second fastening means.
The invention provides the above-described disposable diaper, wherein either one of the first fastening means and the second fastening means is made of a male member of a mechanical fastener and the other is made of a female member of the mechanical fastener or nonwoven fabric engageable with the male member.
The invention provides the above-described disposable diaper, wherein the central portion of the fastening tape has (a) a plastic deformable area and (b) a stretchable area, each being formed on at least one surface side of said central portion and extending in the longitudinal direction of the tape.
The invention provides the above-described disposable diaper, wherein the stretchable area (b) is provided on the plastic deformable area (a) in a line, a band or a spiral form.
The invention provides the above-described disposable diaper, wherein a plurality of the stretchable areas (b) alternate with the plastic deformable areas (a) in the width direction of the tape.
The invention provides the above-described disposable diaper, wherein the plastic deformable area (a) and th
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Kikuchi Fumiaki
Toyoda Harumitsu
Kao Corporation
Polutta Mark O.
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