Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1997-01-23
2000-05-23
Yu, Mickey
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
6043851, 604378, 604365, 604369, 28121, A61F 1315, A61F 1320
Patent
active
060661216
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a liquid-absorbent article.
The present invention also relates to a method and an apparatus for the manufacture of a liquid-absorbent article.
The present invention more particularly relates to articles provided with leakage barriers primarily intended for use on sanitary towels, but that of course may be used on other types of absorbent articles such as incontinence protection, diapers or similar.
Edge-leakage is a widespread problem primarily on sanitary towels, since patches of menstrual blood are difficult to remove and are experienced as extremely embarrassing by the affected user. Sanitary towels, in contrast to diapers or the like, are fastened directly in the panties by the user herself. Since both the size and shape of ladies panties vary greatly, it may easily happen that the positioning of the sanitary towel is less than optimal and varies from one time to another and between different users. An additional factor that increases the risk of leakage is that the sanitary towel is deformed during use, or moves away from its original position in the panties. The negative effect of erroneous positioning or deformation of the sanitary towel may to a certain extent be alleviated by the provision of raised edge-leakage barriers on each side of the longitudinal side-edges of the sanitary towel. Even if, by accident, the sanitary towel has assumed such a position that it will be wetted near an edge-portion, the liquid may thereby be prevented from pouring out over the edge and giving rise to soiling of the user's clothes.
Edge-leakage barriers are furthermore effective for controlling the spreading of liquid in the longitudinal direction of the sanitary towel. This is particularly useful in conjunction with the nowadays commonly available, extremely thin sanitary towels which often have an absorption core with high liquid-spreading capacity. The drawback with such absorption cores, is that they usually spread out liquid equally well in all directions. Hereby, leakage arises as soon as the liquid reaches out to the side-edges of the sanitary towel.
BACKGROUND OF THE INVENTION
A number of different raised edge-leakage barriers are known in the prior art, see for example WO93/12795, showing edge-leakage barriers on a sanitary towel, which are formed by folded portions of the cover of the sanitary towel. An elastic cord, fastened and prestressed at each end, extends along the inside of the formed folds and keeps the barrier raised in an in-use position. Ensuring a safe fastening of the ends of the cord means placing great demands upon the manufacture of the sanitary towels. Furthermore, the cord does not counteract sideways flattening. Additionally, transversal folds are formed by the action of the elastic cord in the barrier-wall, which may be experienced as uncomfortable by the user.
An additional problem with modern sanitary towels, are that the surface material often consists of a perforated plastic layer, having favourable characteristics in terms of high liquid-permeability, high surface dryness and little rewetting (i.e. small risk that liquid is pressed back out again through the layer). Such a material is experienced as "plasticky" by many users and therefore it has become common to provide the edge-portions of the sanitary towels with more "textile" strips of non-woven material (fibre cloth). An example of a document describing such "textile edges" is SE-B-900349D-1, which shows edge-portions with flat folds, yielding a very limited liquid-stopping effect.
SUMMARY OF THE INVENTION
The object with the present invention is to provide a liquid-absorbent article with an edge-leakage barrier, which by means of an integrated resilient action effectively counteracts squeeze in a direction of height as well as in a sideways direction.
Said object is achieved by a liquid-absorbent article according to the present invention.
Said object is also achieved by a method and an apparatus for the manufacture of a liquid-absorbent article.
BRIEF DESCRIPTION OF
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Lindquist Bengt
Olsen Clas
Nguyen Tram A.
SCA Hygiene Products AB
Yu Mickey
LandOfFree
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