Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1985-07-08
1988-03-15
Yasko, John D.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604368, A61F 1316
Patent
active
047310715
DESCRIPTION:
BRIEF SUMMARY
The invention has as its subject a liquid-absorbent disposable article. This article is intended for use as a complete diaper change for adults or babies, but it can also be used as a menstrual napkin for absorbing the menstrual liquid, or as a dressing.
In addition to the function of absorbing liquids, such an article should avoid keeping the liquid in contact with the user's skin in order, on the one hand, to improve the general comfort of the user and, more especially, as far as possible, to prevent the liquid, which undergoes a degradation phenomenon known as maceration, causing skin irritation. For this purpose, it is necessary that the fluid migrates to regions of the padding removed from the user's skin.
There has thus been proposed in French Pat. Nos. 1,326,227 and 2,301,189 a disposable article consisting of an absorbent cellulose foam padding covered on the outer face with a polyethylene sheet and on the inner face with a nonwoven fabric sheet, the assembly being folded along longitudinal lines to form a bellows. The various layers thus formed are welded together in their middle region while the edges can be spread out to pass round the user's waist.
Such a device has, however, the following disadvantage: When it is emitted, the fluid encounters only a single thickness of cellulose foam in the central part, since it cannot pass through the various thicknesses on account of the presence of the impermeable sheet. The same applies at the parts situated in front of and behind the user, since the diaper is spread out when in position.
In order to overcome this disadvantage, U.S. Pat. No. 3,746,592 describes an absorbent padding folded in the shape of a C, having two superimposed layers and a central channel. This device permits an improved distribution of the urine, but has two major drawbacks.
The padding is of substantial constant thickness over its whole surface, which makes it difficult to adapt to the user's anatomy. It is in fact preferable that the regions designed to pass round the top of the thighs, which regions are often provided with elasticated strips, have a degree of flexibility.
Furthermore, the liquid is "stored" in a region which is too close to the user's skin. Admittedly, the liquid is in part drained towards the outer layer, but it also tends to return to the inner layer, which consequently considerably reduces the effect sought.
The invention has the object of overcoming these disadvantages by proposing an absorbent article which has improved absorption while providing for very good adaptation to the user's anatomy.
According to the invention, the absorbent article is characterized in that it incorporates an absorbent padding of substantially rectangular shape, covered on its inner face with a sheet which is permeable to liquids such as a non-woven fabric sheet, and on its outer face a sheet impermeable to fluids such as a polyethylene sheet, these two sheets being partially or totally welded together along their edges, and in that the absorbent padding is formed from at least three superimposed layers consisting of one or more sheets of cellulose foam, the outer layer being continuous while the other layers consist of two juxtaposed half-layers arranged symmetrically with respect to the longitudinal axis of the padding.
In this description, the adjective "inner" denotes the face or layer which is closest to the user's skin, while the adjective "outer" denotes the face or layer furthest removed from the user's skin.
The central channel formed by the juxaposition of the half-layers enables the liquid to drain towards the outer layer, and thus provides for storage of the liquid away from the user's skin, in the outer layer.
It is preferable, both for reasons of manufacture and absorption capacity, that the absorbent padding should be formed from a single layer and incorporates a longitudinal central strip corresponding to the outer layer and at least two lateral strips located on either side of the central strip and folded onto the inner face of the latter in a zigzag (pleated) so
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Beghin-Say S.A.
Breiner A. W.
Yasko John D.
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