Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1982-11-18
1985-01-29
Yasko, John D.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
A61F 1316
Patent
active
044963599
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to sanitary articles to absorb body liquids. Quite particularly it is suited to the manufacture of single-use articles such as menstrual napkins and disposable pilches.
Such articles evince a stratified structure consisting of a pad absorbing and retaining liquids (cellulose fiber mattress) located between a liquid-permeable sheet in contact with the human body and an external liquid-impermeable sheet. Means assuring that the article will be well kept in place on the body are added to this structure.
For instance, in the case of a menstrual napkin, provision is made for one or more continuous or interrupted lines of adhesive to fasten the napkin to some piece of underwear. The lines of adhesive most of the time are arranged in the median part, that is closer to the longitudinal axis of the napkin than to its edges.
Considering the anatomical differences between users, it is impossible to avoid substantial deformations in the napkin's absorbing mass. These large deformations degrade the absorption of the body liquids and cause leaks, soiling the underwear.
The leaks also are enhanced because there is no efficacious barrier in the lateral zones of the absorbing mass.
To remedy these drawbacks, the present invention recommends a novel structure for an absorbing article whereby the external liquid-impermeable sheet encloses the absorbing-mass pad across its entire thickness and also is applied against the longitudinal edges of the pad side facing the human body (i.e., the pad inside).
The absorbing-mass pad accordingly is completely inserted, exception made of the absorption surface facing the human body, in an impermeable "pocket" which at the same time also is the article's outer wrap. Such an arrangement reinforces the "pocket" effect across the entire thickness of the absorbing mass.
In the preferred embodiment of the invention, the external impermeable sheet comprises sideways extensions obtained by folding its lateral parts above the longitudinal edges of the pad side facing the body, said sideways extensions constituting, on either side and beyond the surface bounded by the absorbing pad, supports for the lines of adhesive, whether continuous or interrupted, which serve to fasten the napkin to the underwear.
Such an arrangement of the lines of adhesive outside the surface bounded by the absorbing-mass pad makes it possible to keep the largest surface possible of the absorbing pad in contact with the body (the napkin is stressed laterally).
Preferably, the lines of adhesive are arrayed at particular distances from the pad's edges substantially equal to the pad thickness in the compressed state. Such an arrangement offers the advantage of applying the napkin's longitudinal edges under pressure against the user's body and consequently to reinforce both the reliability (fewer chances of lateral leaks) and the absorption (good contact between the absorbing mass and the user's body). Moreover, the menstrual napkin, being kept in place by two external lines of adhesive on the surface of the pad, tends to curve toward the user's body, further reinforcing the absorption effect.
The invention also applies to disposable pilches in that it permits eliminating more effectively the lateral leaks, in that it enhances the absorption and the retention by the "pocket" effect of the new structure.
In same manner as applies to a menstrual napkin, the external fluid-impermeable sheet encloses the absorbing pad across its entire thickness, then is folded back along the longitudinal edges of the inside (near the body) of the pad which thereby is wholly inserted into an open, impermeable pocket opposite its absorbing side.
Again in the same manner, the external impermeable sheet comprises sideways extensions on which in this case are fastened elastically extending elements to assure the hermeticity of the crotch.
Other advantages and features of the invention will become clear in the description below of two illustrative embodiments accompanied by a drawing:
FIG. 1 is a cross-section of a menstrua
REFERENCES:
patent: 3814100 (1974-06-01), Nystrand et al.
patent: 4246900 (1981-01-01), Schroder
patent: 4285343 (1981-08-01), McNair
Beghin-Say S.A.
Breiner A. W.
Yasko John D.
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