Sanitary napkin

Details Sanitary napkin Sanitary napkin

1989-06-02

1992-07-14

Isabella, David

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

6043851, 604393, A61F 1356

Patent

active

051298937

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to a sanitary napkin consisting of an absorbent core enclosed in a casing which is composed of two surface layers joined together around the absorbent core and of which the surface layer facing the wearer's body is liquid permeable, whereas the surface layer facing away from the wearer's body is liquid impermeable.
The object of the invention is to minimize the risk of leakage associated with sanitary napkins.
As far as diapers are concerned, the technique of utilizing elastic for providing the absorbent core with upwardly bent portions is previously known, the absorbent core in this manner being capable of momentarily taking up larger amounts of fluid.
With regard to sanitary napkins however, this prior art method is not optimally applicable because firstly, the fluid discharged very seldomly amounts to such large quantities that it cannot be immediately absorbed by the sanitary napkin and secondly, the sanitary napkin is affixed inside the panty instead of being secured to the body of the wearer by tightening a backing sheet or the like around the abdomen, as is the case with diapers. Therefore, leakage generally does not result from a large momentarily non-absorbable volume of fluid flowing within the absorbent core and leaking out of it but instead, leakage in a sanitary napkin is more likely caused by menstrual fluid often seeping down outside the absorbent core, thereby giving rise to discoloration of panties or other garments.
The invention has for its object to diminish to a large extent the risk of leakage associated with the use of sanitary napkins. According to the invention, this is accomplished with a sanitary napkin having the distinguishing features set forth in the appended Claim 1.
By the action of elastic means applied to the outside of the sanitary napkin, the napkin will be urged to exert a resilient pressure onto the outer genitals of the wearer, preventing in this manner any menstrual fluid from seeping down outside the absorbent core.
In order to facilitate the understanding of the invention, an embodiment thereof will now be described with the aid of the accompanying drawings, of which
FIG. 1 is a view of the inventive sanitary napkin as seen from the side facing away from the wearer;
FIG. 2 is a view similar to that of FIG. 1 but showing the sanitary napkin in its freely distorted state;
FIG. 3 is a perspective view of the inventive sanitary napkin in its state of distortion as seen obliquely from above and having its body contacting side turned upwards; and
FIG. 4 is a cross sectional view of the sanitary napkin shown in FIG. 3.
The sanitary napkin illustrated in the figures consists of an absorbent core 1 which is enclosed in a casing composed of two surface layers 2, 3, said layers being joined together in a suitable manner around the absorbent core. The suitable layer 2 is liquid impermeable and is placed during use to face away from the wearer's body. Furthermore, a binder coating with only a limited extension is applied to this surface layer for the sake of securing the sanitary napkin inside the wearer's panty. The binder coating is covered in a conventional manner with a piece of releasable protective tape 4. The surface layer 3 is liquid permeable and thus intended for placement in close contact with the wearer's body on application of the sanitary napkin in the panty.
As is most clearly evident from FIG. 1 showing the sanitary napkin in a planar condition, the napkin is provided with prestretched elastic means 5, 6 affixed to the side of the surface layer 2 facing the absorbent core, for example by gluing. Said elastic means can consist of ribbons or threads 5 extending along the absorbent core and outside its two long sides, and transverse threads 6 interconnecting the longitudinal threads 5.
FIGS. 2-4 illustrate a sanitary napkin according to FIG. 1 in a freely destorted state, which is the configuration the sanitary napkin is imagined to assume unless exposed to any amount of stress whatsoever. In its state of free distortion, the napkin w

REFERENCES:
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patent: 4631062 (1986-12-01), Lassen et al.
patent: 4661102 (1987-04-01), Shikata et al.
patent: 4662877 (1987-05-01), Williams
patent: 4692163 (1987-09-01), Widlund et al.
patent: 4897084 (1990-01-01), Ternstrom et al.
patent: 4911701 (1990-03-01), Mavinkurve
patent: 4935021 (1990-06-01), Huffman et al.

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