Layered absorbent structure with wicking performance
AssigneeEam Corporation
InventorPaul M. Ducker
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Abstract
The present invention relates to a layered absorbent structure in the form of a laminate including liquid storage layers comprising particulate superabsorbent material and adhesive fibers. Notably, the absorbent structure includes a wicking layer positioned between the liquid storage layers, with the wicking layer desirably acting to improve fluid spreading and rewet performance of the absorbent structure. The wicking layer preferably comprises airlaid cellulosic fibrous material such as wood pulp, and may optionally include superabsorbent polymer. A bonding pattern of the wicking layer is oriented to enhance wicking and rewet performance.
Claims12
A layered absorbent structure, comprising:
- a central wicking layer, and first and second liquid storage layers positioned in liquid-transferring relationship on respective opposite sides of said central wicking layer,
- said central wicking layer comprising hydrogen-bonded cellulosic fibrous material,
- each of said first and second liquid storage layers a comprising a matrix of adhesive filaments and absorbent particles, said adhesive filaments adhering said first and second storage layers to respective opposite sides of said central wicking layer,
- each of said first and second liquid storage layers comprising a cellulosic fiber tissue layer adhered to the respective matrix of adhesive filaments and absorbent particles on the side of the respective matrix opposite said central wicking layer.
A layered absorbent structure, comprising:
- a central wicking layer, and first and second liquid storage layers positioned in liquid-transferring relationship on respective opposite sides of said central wicking layer,
- said central wicking layer comprising hydrogen-bonded cellulosic fibrous material,
- each of said first and second liquid storage layers a comprising a matrix of adhesive filaments and absorbent particles, said adhesive filaments adhering said first and second storage layers to respective opposite sides of said central wicking layer,
- each of said first and second liquid storage layers comprising a cellulosic fiber tissue layer adhered to the respective matrix of adhesive filaments and absorbent particles on the side of the respective matrix opposite said central wicking layer.
- a. Where the vertical delamination strength exceeds 4N
- b. Where the central wicking layer is bonded in some areas but not others.
- c. Where the central wicking layer has a density in the range of 0.08 g/cc to 0.25 g/cc.
- d. Where the caliper of the absorbent structure is 3 mm or less.
Dependencies are inferred from the claim text.