Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Reexamination Certificate
1996-02-29
2001-07-24
Dawson, Glenn K. (Department: 3761)
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
C604S385250, C604S385310, C604S385270, C604S385290
Reexamination Certificate
active
06264642
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to disposable absorbent articles, and more particularly to a disposable absorbent article having an elasticized laminate, liquid impermeable backsheet for improving waste containment.
Disposable absorbent products have been designed and used for various purposes. For example, some have been designed for use as diapers for babies, some as training pants for younger children generally between the age of 18 months to 36 months, and some as incontinence products for adults. One of the most important functions of any disposable absorbent product is the containment of liquid and other waste material. Failure to do so results in leakage and wetting of the clothes, both of which are highly undesirably to the wearers and caregivers.
Most of these disposable absorbent products are multi-layer designs having a liquid impermeable outer layer, a liquid permeable inner layer, and an absorbent therebetween. There may be additional components, such as containment flaps, additional layers of absorbent material, elastic materials, or the like. In many of these products, the sides or edges of some of the layers are coincident, and this can cause a problem in accurately registering or positioning other components relative to the coincident layers. This is due to the weaving of the layers as they proceed through the manufacturing process, and is generally termed “web weave.” Other problems relating to this lack of web weave tolerance include inaccurate application of adhesive to or between layers or components, the necessity of applying excessive amounts of adhesive, or the like.
Ultimately, any one of these problems, or a combination, can cause undesired tearing or separation of layers or components in the products, increased cost in manufacture or materials, undesired exposure of layers or components, inferior waste containment, or the like. In view of this, it is apparent that there exists a need for improving waste containment.
SUMMARY OF THE INVENTION
In response to the discussed difficulties and problems encountered in the prior art, a disposable absorbent article having improved waste containment has been discovered.
In one form of the present invention there is provided a disposable absorbent article including a liquid impermeable backsheet and an absorbent structure on the backsheet. The liquid impermeable backsheet defines a liquid barrier zone on each side of its centerline, and both liquid barrier zones extend between a front edge and a back edge of the liquid impermeable backsheet. A liquid impermeable containment flap is over each liquid barrier zone, and a mechanism extends between the front edge and back edge of the backsheet in the liquid barrier zones to provide liquid barriers between the liquid impermeable containment flaps and the liquid impermeable backsheet.
In another form of the present invention there is provided a disposable absorbent article including a backsheet having an outer layer and a liquid impermeable inner layer. A leg elastic member is elastically associated along each side edge of the backsheet, and is positioned between the outer layer and the liquid impermeable inner layer. An absorbent structure is on the backsheet, and a liquid barrier zone is defined by the backsheet on each side of the absorbent structure, wherein both liquid barrier zones extend between a front edge and a back edge of the backsheet. A liquid impermeable containment flap is over each liquid barrier zone, and a liquid barrier is in each liquid barrier zone between the containment flap and the backsheet.
In still another form of the present invention there is provided a disposable absorbent article including a pant body having a waist opening periphery, a pair of leg opening peripheries, and an interior space. The pant body further includes a liquid impermeable backsheet having a front edge and a back edge that are substantially contiguous with the waist opening periphery. An absorbent structure is on the liquid impermeable backsheet in the interior space, and a liquid barrier zone is defined by the backsheet on each side of the absorbent structure. A liquid impermeable containment flap is over each liquid barrier zone, and a liquid barrier is in each liquid barrier zone between the liquid impermeable containment flap and the liquid impermeable backsheet.
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Patent Cooperation Treaty Search Report from the International Search Authority, International Application No. PCT/US 97/01998 dated Jun. 27, 1997.
Kuen David Arthur
Van Deurzen John Irvin
Dawson Glenn K.
Gage Thomas M.
Kimberly--Clark Worldwide, Inc.
Miller Douglas L.
Reichle K. M.
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