Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1997-01-10
1999-02-23
Weiss, John G.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604378, 604381, A61F 1315, A61F 1320
Patent
active
058738673
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
Absorbent structure comprising: two longitudinal sides, and the back transverse edge, front transverse edge and transverse edge, and
The invention also relates to an absorbent article comprising such a structure.
BACKGROUND OF THE INVENTION
In the field of absorbent product technology, many attempts have been made to optimise the absorbent capacity and efficiency of absorbent cores by providing regions of increased or diminished basis weight and density in such cores.
In U.S. Pat. No. 4,935,022 (Lash) an absorbent structure is disclosed which has a lower storage layer and an upper acquisition/distribution layer comprising chemically stiffened cellulose fibers and absorbent gelling material. The upper acquisition/distribution layer is of larger surface area than the underlying storage layer. The lower storage layer is formed of an insert, which is placed relative to the upper acquisition/distribution layer such that about 75% of the absorbent gelling material in the lower layer is found in the front two-thirds section of the absorbent structure, and at least 55% of the total amount of absorbent gelling material is found in the front half section.
In U.S. Pat. No. 4,685,915 (Hasse) an absorbent product is disclosed having a core comprising hydrophilic fibers and absorbent gelling material, the core having an area of higher average density and basis weight than the end portions of the core. The area of higher average density and basis weight is located near the center or the front of the absorbent product.
In U.S. Pat. No. 4,834,735 (Alemany) an absorbent core is disclosed having a storage zone and an acquisition region of lower average density and basis weight than the storage zone. The core comprises a mixture of hydrophilic fibers and absorbent gelling particles. The acquisition region is located towards the front of the absorbent core.
In European Patent No EP-B-0 330 675, it is disclosed to introduce absorbent gelling material into specific locations of a horizontal, or x-y plane of an absorbent core using pulsed powder spray guns.
In International patent applications no's WO 91/11163 and WO 91/11165, a dual layer core is disclosed comprising a lower storage layer and an upper fluid acquisition/distribution layer comprising chemically stiffened cellulose fibers, the upper layer being substantially free of absorbent gelling material. The area of the acquisition/distribution layer is between 25% and 100% of the area of the lower storage layer, and is preferably of elongated shape. For adult incontinence products, the acquisition/distribution layer is generally located in the front two thirds of the absorbent article, relative to the backsheet.
In U.S. Pat. No. 4,411,660 (Dawn), an absorbent article is disclosed in which a layer consisting of absorbent gelling material underlies a fibrous layer. The layer of absorbent gelling material can be in the form of particles, fibers or a film.
In International patent application WO 91/04724, a diaper core is disclosed which linearly tapers from a relatively narrow crotch section to a relatively wide back section.
It has been observed by the applicant that especially in the category of adults suffering from incontinence, there is an increased tendency for leakage of the absorbent products when used in a predominantly lying-down position of the user. The majority of adults suffering from a severe incontinence are elderly women, for which leakage in this position is relatively frequent compared to other users.
It is an object of the present invention to provide an absorbent product which provides reduced leakage when used in a lying down position.
It is another object of the invention to provide an absorbent article that is especially adapted for users ranging from walking infants to adults, when confined to a predominantly lying down position.
It is a further object of the invention to provide such an absorbent article which especially reduces leakage among woman users when confined to a predominantly lying down position.
An absorbent struct
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Bewick-Sonntag Christopher Philipp
Coles Peter
Costea Helene Karin
Divo Michael
Schone Rainer Walter Max
Hogg Kevin D.
Miller Steven W.
O Ki Yong
Rasser Jacobus C.
The Procter & Gamble & Company
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