Highly absorbent transfer layer structure
AssigneeJohnson & Johnson
InventorRoger Boulanger
Life of this patent
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Abstract
A transfer layer of cellulosic air-laid material characterized by a non-uniform binder distribution profile that allows a faster liquid acquisition. In a specific example, the transfer layer has a higher concentration of binder on its liquid-acquisition surface than on the liquid-release surface. Typically, the liquid-release surface of the transfer layer forms part of the interface transfer layer/absorbent core in the structure for absorbing body exudate.
Claims19
An integrally formed liquid-absorbent article of particulate material including first and second zones in intimate fluid communicative relationship, each zone having a multiplicity of inter-particle interstices admitting passage of liquid, whereby liquid contained in one of said zones is capable of migrating toward the other of said zones, said liquid-absorbent article containing binder, said first zone having a higher average concentration of binder than said second zone;
- wherein said liquid absorbent article is in the form of a sheet;
- wherein said zones constitute superposed layers of said sheet;
- wherein said liquid-absorbent article includes first and second opposite main faces, said first zone including said first main face and second zone including said second main face and wherein said liquid-absorbent article includes a third zone located between said first zone and said second zone, said third zone having a lower density than said first and second zones.
A transfer layer for a disposable absorbent article, said transfer layer including particles defining a multiplicity of inter-particle interstices admitting passage of liquid, said transfer layer including a liquid-acquisition surface through which liquid can ingress said transfer layer and a liquid-release surface through which liquid can egress said transfer layer, said transfer layer containing binder, a concentration of binder in a vicinity of one of said surfaces being lower than in a vicinity of the other of said surfaces;
- wherein said transfer layer is in the form of a sheet, said surfaces being opposite to one another and forming respective main faces of said sheet;
- wherein said transfer layer includes first and second zones forming superposed layers of said sheet, each zone including one of said surfaces, said first zone having a higher concentration of binder than said second zone;
- and
- wherein said transfer layer further includes a third zone located between said first zone and said second zone, said third zone having a lower density than said first and second zones.
Dependencies are inferred from the claim text.