Method for making fluid distribution materials

Details Method for making fluid distribution materials Method for making fluid distribution materials

B - Operations, Transporting

31

F

B31F 1/12 (2006.01) A61F 13/15 (2006.01) B29C 55/18 (2006.01) B31F 1/20 (2006.01)

Patent

CA 2256474

Fluid distribution materials are particularly useful in absorbent core structures used in disposable absorbent articles such as baby diapers, incontinence products, and catamenial products. Wicking properties in a preferential fluid distribution direction of a fluid distribution material are improved by a mechanical post formation treatment. Essentially, the post formation treatment consists of feeding a web (1) of the fluid distribution material between two corrugated rolls (21, 25). Each corrugated roll (21, 25) has intermeshing circumferential ridges (35) and grooves (31). The widths of the ridges (35) and grooves (31) are related to the caliper of the web (1) and the degree of overlap (39) of opposing ridges (35) can be adjusted to vary the degree of mechanical treatment.

Des matériaux répartissant les fluides sont particulièrement utiles dans des structures à noyau absorbant utilisées dans des articles absorbants jetables tels que les couches pour bébés, les produits pour incontinents et les serviettes hygiéniques. Un traitement mécanique d'un matériau répartissant les fluides permet d'améliorer les propriétés d'inhibition par capillarité dans le sens préféré de répartition des fluides. Ce traitement mécanique consiste pour l'essentiel à alimenter l'espace entre deux rouleaux cannelés (21, 25) avec une bande (1) de matériau répartissant les fluides. Chaque rouleau cannelé (21, 25) possède des nervures (35) et des sillons (31) circulaires, qui s'engrènent. La largeur des nervures (35) et celle des sillons (31) dépendent de l'épaisseur de la bande (1); il est possible d'ajuster le degré de recouvrement (39) des nervures opposées (35) en fonction du degré de traitement mécanique.

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