Sanitary napkin

Details Sanitary napkin Sanitary napkin

1996-03-20

1998-08-11

Clarke, Robert A.

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

604378, 6043851, A61F 1315

Patent

active

057921296

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a sanitary napkin or like absorbent article, such as a pantie or incontinence guard, comprising an absorbent body which is enclosed between a fluid-permeable and a fluid-impermeable casing sheet.
2. Description of Related Art
Despite present-day sanitary napkins having absorbent bodies which, almost without exception, have an absorbency which is far greater than what is required to absorb the total amount of fluid discharged during the period over which the napkin is worn, leakage of fluid from the napkin is not an unusual occurrence. Leakage can be caused by the napkin being deformed or moved from its effective position as a result of the movements of the wearer, or because the napkin has been wrongly positioned in the pantie from the outset. A particular problem in this connection is found in those deformations that occur during the night, due to the recumbent position of a sleeping wearer, which will often result in rearward leakage with subsequent soiling of the wearer's night linen and bed linen.


OBJECTS AND SUMMARY

A primary object of the present invention is to solve this problem and to provide a sanitary napkin or like article with improved leakage safety.
This object is achieved in accordance with the invention with a sanitary napkin of the kind defined in the introduction which is characterized in that the absorbent body includes a primary absorbent body having the capacity to absorb all fluid discharged by a user during the intended use period of the article, and a secondary absorbent body which has an area which is at least 50% larger than the area of the primary absorbent body. This provision of the secondary absorbent body eliminates practically all risk of fluid leaking from the napkin.
According to one preferred embodiment of the invention, the area of the secondary absorbent body is at least 70% larger than the area of the primary absorbent body and the secondary body is more flexible or pliable than the primary body. The secondary absorbent body also extends beyond the primary absorbent body around the full circumference thereof, and the primary absorbent body is placed in the front part of the secondary absorbent body, as seen in the use position of the napkin, and when the sanitary napkin is worn lies proximal to the wearer's body in that part of the sanitary napkin where the primary and the secondary absorbent body mutually overlap. The secondary absorbent body comprises advantageously one or more tissue layers and is provided with means which counteract fluid transport in the absorbent material. These fluid transport counteracting means consist of folds formed in the secondary absorbent body or of lines or regions of non-absorbent material formed in the secondary absorbent body. According to one variant, the fluid transport counteracting means are absorbent fibers capable of binding absorbed fluid chemically.
The inventive sanitary napkin is intended for coaction with a pantie that includes a front-part, a back-part and an intermediate crotch-part, and at least that part of the secondary absorbent body which is intended to be placed in the central part of the crotch-part of the pantie has the same shape as said central part.


BRIEF DESCRIPTION OF THE DRAWINGS

An inventive sanitary napkin will now be described in more detail with reference to the accompanying drawings, in which:
FIG. 1 illustrates one embodiment of an inventive sanitary napkin inserted into a pantie;
FIG. 2 is a front view of the sanitary pantie of FIG. 1 and shows the pantie assembled and worn;
FIG. 3 is a rear view of the sanitary pantie of FIG. 1 and shows the pantie assembled and worn;
FIG. 4 illustrates schematically deformation of an absorbent body inserted in a pantie according to FIGS. 1-3 when worn;
FIG. 5 is an exploded view of the sanitary napkin shown in FIG. 1;
FIG. 6 illustrates the sanitary napkin of FIG. 2 from above; and
FIG. 7 illustrates a variant of the napkin shown in FIGS. 1-3.


DETAILED DESCRIPTION OF PR

REFERENCES:
patent: 3463154 (1969-08-01), Hendricks
patent: 4333466 (1982-06-01), Matthews
patent: 4758241 (1988-07-01), Papjohn
patent: 4940462 (1990-07-01), Salerno
patent: 5275591 (1994-01-01), Mavinkurve

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