Absorbent structures having fluid distribution and storage...

A - Human Necessities – 61 – F

Patent

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Details

A61F 13/15 (2006.01)

Patent

CA 2334351

Disclosed is an absorbent structure including a liquid acquisition layer and a fibrous liquid storage layer in liquid communication with the acquisition layer. The storage layer includes SAP particles. The acquisition layer includes synthetic fibers and the fibers are latex bonded. A fluid acquisition and/or distribution layer (ADL) containing at least two layers, a top layer of latex bonded synthetic fibers and a bottom layer of latex and/or thermal bonded cellulose fibers and method for preparation thereof are disclosed. The synthetic fiber layer is highly porous and provides rapid fluid acquisition under load. The cellulose layer provides z-direction capillary force to pull fluid into the absorbent product, to provide temporary fluid immobilization, and to act as a conduit for fluid to be pulled into unsaturated portion of the permanent fluid storage layer. The ADL of the invention provides increased protection against leakage relative to single-layer ADLS.

L'invention concerne une structure absorbante comprenant une couche d'acquisition de fluide et une couche fibreuse de stockage de fluide, avec possibilité d'échange de fluide entre les deux couches. La couche de stockage comprend des particules polymères ultra-absorbantes. La couche d'acquisition comprend des fibres synthétiques à liaison en latex. L'invention concerne en outre une couche d'acquisition et/ou de distribution de fluide qui comporte elle-même au moins deux couches, à savoir une couche supérieure à base de fibres synthétiques à liaison en latex et une couche inférieure en fibres cellulosiques à liaison en latex et/ou thermique, et l'invention concerne aussi un procédé d'élaboration correspondant. La couche en fibres synthétiques est hautement poreuse, assurant une acquisition rapide de fluide sous charge. La couche de fibres cellulosiques exerce une force capillaire de direction z pour absorber le fluide dans le produit absorbant, pour assurer également une immobilisation temporaire du fluide, et enfin pour agir comme un conduit visant à orienter le fluide vers la partie non saturée de la couche de stockage permanent du fluide. La couche d'acquisition et/ou de distribution de fluide considérée assure une protection accrue contre les fuites propres aux couches du même type dont la structure est monocouche.

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