Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1992-05-29
1994-03-22
Green, Randall L.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
6043851, 604358, A61F 1315
Patent
active
052959872
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to disposable absorbent articles, such as diapers, incontinence guards or sanitary napkins, which comprise an outer liquid-impermeable casing layer which is intended to face away from the wearer's body in use, an inner liquid-permeable casing layer which is intended to face towards wearer's body in use, and an absorbent pad enclosed between the two casing layers
Such articles are mass produced, normally by being manufactured in a flat state, i.e. substantially flat absorbent bodies or pads are placed on a moving web of material and a further web of material is placed on the first mentioned web and fastened thereto in regions which lie outside the absorbent pads, whereafter a finished article is cut from the web. Although such articles can be manufactured readily at requisite production rates, the shape of the finished article does not conform well to the shape of the user's body, since the manufactured article is essentially flat. Consequently, when putting on an article that has been manufactured in this way, it is necessary to deform the article in order to cause it to conform to the shape of the wearer's body. This incurs the serious risk of forming folds or pleats in the article or of forming gaps between the article and the wearer's body when putting on the article. These folds and gaps greatly increase the risk of leakage.
In order to improve the shape conformity of such articles and also to reduce the risk of lateral leakage, such articles will often be provided with leg and waist elastication, and it is also known to utilize patterns of pre-stretched elastic threads or bands in a manner to impart a basin-like configuration to the article or to parts thereof.
The object of the present invention is to provide an absorbent disposable article, such as a diaper, an incontinence guard or a sanitary napkin, which will fulfill the high requirements placed on shape conformity and which is suitable for manufacture in a flat state and therewith at low production costs.
This object is achieved in accordance with the invention in that an absorbent disposable article of the kind mentioned in the introduction is characterized in that the absorbent pad is divided into mutually separate parts which extend in the longitudinal direction of the article, at least within the crotch part thereof, i.e. that region of the article which, in use, is intended to be placed in the vicinity of the user's crotch; in that said pad parts are mutually separated transversely in said crotch region by intermediate, mutually attached parts of the two casing layers; and in that transverse elastication is provided within the region of the separate parts of said absorbent pad such as to cause the edges of mutually adjacent, separate parts to move into abutment with one another while gathering together intermediate parts of the mutually fastened casing layers.
Because those regions of the mutually joined casing layer parts which separate the individual parts of the absorbent body are gathered together by the transverse elastication of the article in the last stage of the manufacturing process, i.e. the cutting stage, the overall cross dimensions of the article in this region will decrease. This means that the cross dimensions of those regions of the article which lie outside the extension of the longitudinally extending separate parts are also forced to decrease, which can only be realized by the article assuming a curved form in said regions. The invention thus results in a three-dimensional article.
According to one advantageous embodiment of the invention, the cross dimensions of the regions of mutually joined casing layers between adjacent separate parts of the absorbent pad in the extended state of said regions are greatest in the centre of the crotch part of the article, so as to be successively smaller in the longitudinal direction of said article, on both sides of the centre part of the crotch part, at least in the end parts of said regions. As a result, when said regions are gathered together in the af
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Hansson Roy
Widlund Leif U. R.
Clarke Rob
Green Randall L.
Molnlycke AB
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