Apparatus for measuring the crush recovery of an absorbent...

G - Physics – 01 – N

Patent

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Details

G01N 3/40 (2006.01) G01N 3/00 (2006.01) G01N 3/08 (2006.01) G01N 33/34 (2006.01) G01N 33/36 (2006.01)

Patent

CA 2221134

An apparatus is disclosed for measuring the crush recovery of an absorbent article as well as the article itself. The apparatus includes a tester having first and second arms, at least one of which is movable. The apparatus also includes a first frame member attached at one end to the first arm of the tester. The first frame member has a shoulder with a first wand extending outwardly therefrom. The apparatus further includes a second frame member attached at one end to the second arm of the tester. The second frame member has a shoulder with a second wand extending outwardly therefrom. The first and second frame members are interleaved such that the first and second wands are spaced apart to enable an absorbent article to be positioned therebetween. Movement of the first frame member relative to the second frame member causes the absorbent article to be crushed in a sideways direction between the shoulders. As the relative movement of the frame members is reversed, the absorbent article is able to expand outward toward its original transverse dimension. The amount of sideways recovery is measured as the "crush recovery" value. The absorbent article includes a liquid-permeable cover, a liquid- impermeable baffle and an absorbent positioned between the cover and the baffle. The absorbent article has a crush recovery value of at least about 15 mm, a wet load value of at least about 300 grams, a stress value of less than about 100 grams/mm, and a thickness of less than about 5 millimeters.

Cette invention concerne un appareil de mesure de la reprise à l'écrasement d'un article absorbant ainsi que l'article absorbant même. Cet appareil comporte un dispositif de contrôle pourvu d'un premier et d'un second bras, dont au moins un est mobile. L'appareil comporte également un premier élément de bâti attaché par une extrémité au premier bras du dispositif de contrôle. Ce premier élément de bâti a un épaulement pourvu d'une première lame flexible faisant saillie vers l'extérieur. Ledit appareil comporte en outre un second élément de bâti attaché par une extrémité au second bras du dispositif de contrôle. Les premier et second éléments de bâti sont intercalés de telle manière que les première et seconde lames flexibles soient suffisamment espacées pour permettre l'insertion entre elles d'un article absorbant. Le déplacement du premier élément de bâti par rapport au second provoque l'écrasement latéral de l'article absorbant entre les épaulements. Lorsque le déplacement relatif des éléments de bâti est inversé, l'article absorbant peut se déployer latéralement et revenir à sa dimension initiale. La mesure de la reprise latérale constitue la valeur de "reprise à l'écrasement". L'article absorbant comporte une enveloppe perméable aux liquides, une cloison imperméable aux liquides et un matériau absorbant intercalé entre l'enveloppe et la cloison. Cet article absorbant possède une valeur de reprise à l'écrasement d'au moins 15 mm, une valeur de chargement humide d'au moins 300 grammes, une valeur d'effort unitaire inférieure à 100 gr/mm et une épaisseur inférieure à 5 millimètres environ.

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