Absorbent members for body fluids using hydrogel-forming...

Details Absorbent members for body fluids using hydrogel-forming... Absorbent members for body fluids using hydrogel-forming...

A - Human Necessities

61

F

A61F 13/15 (2006.01) A61L 15/60 (2006.01)

Patent

CA 2284974

Absorbent members useful in the containment of body fluids such as urine, that have at least one region containing hydrogel-forming absorbent polymer in a concentration of from about 50 to 100 % by weight and providing a gel- continuous fluid transportation zone when in a swollen state. This hydrogel- forming absorbent polymer has: (a) a Dynamic Gelling Rate of at least about 0.18 g/g/sec; (b) a Performance under Pressure (PUP) capacity value of at least about 25 g/g under a confining pressure of 0.7 psi (5 kPa); and (c) when the hydrogel-forming absorbent polymer is in the form of particles, a mass median particle size of at least about 100 µm.

Cette invention se rapporte à des éléments absorbants destinés à la rétention de fluides corporels tels que l'urine, dotés d'au moins une région contenant un polymère absorbant qui est susceptible de former un hydrogel et dont la concentration est comprise entre 50 et 100 % environ, ladite région constituant une zone de transport de fluides rendue continue par le gel, à l'état gonflé. Ce polymère absorbant susceptible de former un hydrogel possède (a) un taux de gélification dynamique supérieur ou égal à 0,18 g/g/s environ; (b) une valeur de capacité de réaction à la pression (PUP) supérieure ou égale à 25 g/g environ sous une pression de confinement de 0,7 psi (5 kPa) et (c) lorsque le polymère absorbant susceptible de former un hydrogel se présente sous forme de particules, ces particules possèdent un diamètre médian massique supérieur ou égal à 100 µm environ.

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