Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1996-06-11
1998-04-07
Weiss, John G.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
A61F 1315
Patent
active
057358397
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a shorts type disposable diaper suitable for use as a diaper for infants and adults, underwear for those suffering from incontinence of urine, or training pants. More particularly, it relates to a shorts type disposable diaper which fits the wearer's body and surely prevents leakage while it is worn.
BACKGROUND ART
Various types of shorts type disposable diapers having a waist opening portion and a pair of leg opening portions have been proposed. As an example of recent proposals, Japanese Patent Application Laid-Open 4-166150 discloses a shorts type disposable diaper in which a plurality of elastic members are provided at a body-surrounding portion which is located between the waist opening portion and the pair of leg opening portions and at which an absorbent member is provided, forming substantially continuous gathers along the entire circumference of the body-surrounding portion. The shorts type disposable diaper disclosed fits the wearer's body very well owing to the elastic members of the body-surrounding portion and surely prevents leakage of discharged waste materials while it is worn.
However, demands for shorts type disposable diapers having further improved leakproofness have recently been increasing. That is, after a wearer discharges the waste materials, even the above-mentioned shorts type disposable diaper gets out of the right position due to the weight of the discharged waste materials, partly swells out into poor appearance, and loses a good fit, tending to hinder the wearer's movement and to cause leakage of the discharged waste materials. Therefore, it has been demanded to develop a shorts type disposable diaper which does not slide down and causes no leakage even after a wearer discharges solid waste materials.
The extensibility (elongation) of the elastic members provided at the body-surrounding portion may be increased so as to prevent sliding of a disposable diaper. However, increased elongation imposes excessive pressure on the wearer's body and considerably reduces comfort. Japanese Patent Application Laid-Open 4-371148 proposes a shorts type disposable diaper having a plurality of elastic members arranged in the body-surrounding portion in such a manner that the interval of the elastic members becomes narrower towards waist opening portion, but the diaper of this type still fails to completely satisfy the above requirement.
DISCLOSURE OF THE INVENTION
It is therefore an object of the present invention to provide a shorts type disposable diaper which, even after waste materials are discharged, does not slide down to cause leakage due to the weight of the waste materials, maintains good fit and appearance without swelling in part.
As a result of extensive investigations, the inventors of the present invention have found that the above object of the present invention can be accomplished by a shorts type disposable diaper having gathers formed at the site which is located in the vicinities of the urination portion for a wearer (the first finding) and a shorts type disposable diaper having elastic members at the body-surrounding portion disposed in such a manner that the interval of the elastic members becomes narrower towards the waist opening portion and that the elongation of the elastic members increases towards the waist opening portion (the second finding).
The present invention has been completed based on the first finding and provides a shorts type disposable diaper comprising an absorbent body which comprises a liquid permeable topsheet, a liquid impermeable backsheet, and an absorbent member interposed between the topsheet and the backsheet, side of a diaper wearer When the diaper is worn and a rear waist body portion located on the back side of the wearer, the front and rear waist body portions being joined and sealed together at opposing lateral side edges thereof to form a waist opening portion and a pair of leg opening portions, being provided with an elastic member which forms substantially continuous gathers along the en
REFERENCES:
patent: 5163932 (1992-11-01), Nomura et al.
patent: 5340424 (1994-08-01), Matsushita
patent: 5415649 (1995-05-01), Watanabe et al.
patent: 5449353 (1995-09-01), Watanabe et al.
patent: 5569232 (1996-10-01), Roe et al.
Kawaguchi Haruko
Kurahashi Masao
Toyoda Harumitsu
Kao Corporation
O Ki Tong
Weiss John G.
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