Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1994-10-14
1998-04-21
Jones, Mary Beth
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604378, 604375, A61F 1315
Patent
active
057412413
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an absorbent body which is intended to form the absorbent element of an absorbent article, such as a diaper, an incontinence guard or a sanitary napkin, and includes a first absorbent layer which is based on cellulose fluff-pulp and which is intended to face towards the wearer in use, i.e to lie proximal to the wearer, and a second absorbent layer which is also based on cellulose fluff-pulp and which is intended to lie distal from the wearer in use, i.e. to face away from the wearer, and which has a high liquid-dispersion capability.
BACKGROUND OF THE INVENTION
An absorbent body, or pad, intended for absorbent articles such as disposable diapers, sanitary napkins and incontinence guards is normally formed of one or more layers of cellulose fluff-pulp and often contains so-called superabsorbents, which are polymers that are capable of absorbing several times their own weight of water or body liquid. The absorbent body may also include other constituents, for instance constituents which improve its liquid-dispersing properties or which increase its ability to hold together and its ability to resist deformation in use.
One serious problem, primarily encountered with diapers and incontinence guards which are intended to receive and absorb relatively large quantities of liquid, is that the articles often begin to leak before their total absorption capacity has been utilized to the full.
Although the use of superabsorbents in absorbent bodies will impart thereto a high absorption capacity and also improve their ability to retain the liquid absorbed, even when the absorbent body is subjected to external pressure forces, present-day superabsorbents have a low absorption rate. Since urination often results in the discharge of large quantities of liquid in the course of some few seconds, the absorbent body will often become temporarily saturated with liquid in local areas, such that further urine discharged by the wearer will leak from the absorbent body.
This premature leakage is, of course, highly irritating to the wearer and also to his/her medic.
Another problem encountered with absorbent sanitary articles of the aforedescribed kind is one of keeping the surface of the article which lies against the wearer in use as dry as possible during the whole of its use period and to prevent so-called rewetting, i.e. to prevent liquid that has already been absorbed being pressed back out of the absorbent pad and rewetting the wearer's skin or giving rise to leakage. The rewetting properties of an absorbent article are improved to some extent when the absorbent body includes superabsorbents which bind the absorbed liquid chemically, even when the article is subjected to external pressure, for instance when the user sits down. However, one difficulty in this regard is in constructing the absorbent body in a manner which will enable the liquid to spread within the absorbent body and reach the superabsorbent material.
Swedish Patent Application No. 9100274-1 describes an absorbent body which includes at least two different cellulose fluff-pulps, wherein the fibre structure of the first absorbent layer is comprised chiefly of a first type of fluff-pulp having an open fibre structure and a low liquid-dispersing capability and a critical bulk which exceeds 8 cm.sup.3 /g at 2.5 kPa, whereas the fibre structure of the second absorbent layer is comprised chiefly of a second type of fluff-pulp having a critical bulk which is beneath 8 cm.sup.3 /g at 2.5 kPa and having a higher liquid-dispersing capability than the fluff-pulp in the first absorbent layer.
As a result of its open fibre structure, the first absorbent layer is able to accommodate a large amount of liquid between its fibres and is therefore able to receive large quantities of liquid over a short period of time, i.e. has a high instantaneous liquid-absorption capability.
The second absorbent layer, which has a higher liquid-dispersing capability than the first absorbent layer, is able to drain liquid from the first layer
REFERENCES:
patent: 4500315 (1985-02-01), Pieniak et al.
patent: 4652484 (1987-03-01), Shiba et al.
patent: 5019063 (1991-05-01), Marsan et al.
patent: 5134007 (1992-07-01), Reising et al.
patent: 5236427 (1993-08-01), Hamajima et al.
patent: 5304161 (1994-04-01), Noel et al.
patent: 5423787 (1995-06-01), Kjellberg
Guidotti Ted
Osterdahl Eje
Cho David J.
Jones Mary Beth
SCA Molnlycke AB
LandOfFree
Absorbent body for an absorbent article does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Absorbent body for an absorbent article, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absorbent body for an absorbent article will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2053754