Apertured absorbent pads for use in absorbent articles
AssigneeKimberly-Clark Worldwide, Inc.
InventorsDavid Jerome Arteman, Nancy Jo Myers
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AssigneeKimberly-Clark Worldwide, Inc.
InventorsDavid Jerome Arteman, Nancy Jo Myers
Estimating the term…
This invention relates to absorbent pads, and methods for fabricating absorbent pads, having improved fluid intake and preferential wicking in the longitudinal direction. The absorbent pads have patterns of apertures which encourage the preferential wicking. The apertures are characterized by size, spacing from each other, and depth of penetration into the absorbent pad, such that fluid intake rate is increased and distribution of fluid in the longitudinal direction is improved. Apertures are preferably spaced close enough to each other that aqueous liquid is preferentially transferred from aperture to aperture by capillary effect, along the length of the absorbent pad. Preferential wicking between apertures in the longitudinal direction increases the overall effective liquid absorption rate of the absorbent pad, thereby increasing overall effective liquid capacity of the respective absorbent article. A novel method of fabricating an absorbent pad of the invention includes penetrating into but not through the absorbent pad using heated pin elements. The heated pin elements form a plurality of apertures in a first surface of the pad, the pad having higher density proximate the apertures than the overall density of the absorbent pad. The lower density areas of the pad have greater aqueous intake rates than higher density portions of the absorbent pad.
An absorbent pad for use in an absorbent article, said absorbent pad having a length and a width, opposing first and second surfaces, a thickness between the first and second surfaces, and an outer layer of said absorbent pad at the first surface, said outer layer being permeable to fluid, the first surface of said absorbent pad having apertures therein, said apertures forming a longitudinal pattern on the first surface and extending from the first surface inwardly of said absorbent pad, substantially all of said apertures terminating in bottoms of the respective said apertures, said apertures forming said longitudinal pattern being spaced sufficiently close to each other that an aqueous liquid is transferred from aperture to aperture by capillary effect to increase the distribution of fluid along the length of said absorbent pad relative to distribution of fluid transverse to the length of said absorbent pad.
An absorbent pad for use in an absorbent article, said absorbent pad having a length and a width, opposing first and second surfaces, a thickness between the first and second surfaces, and an outer layer of said absorbent pad at the first surface, said outer layer being permeable to fluid, the first surface of said absorbent pad having apertures extending from the first surface inwardly of said absorbent pad, substantially all of said apertures terminating in bottoms of the respective said apertures, said apertures having lengths and widths, defining corresponding elongate shapes, the orientations of the lengths of said elongate apertures corresponding to the length of said absorbent pad, said apertures forming a longitudinal pattern spaced sufficiently close to each other that an aqueous liquid is transferred from aperture to aperture by capillary effect to increase longitudinal fluid distribution, relative to distribution of fluid transverse to the length of said absorbent pad.
An absorbent article having a front portion, a rear portion, a crotch portion connecting said front and rear portions, and a longitudinal axis extending through said front, rear and crotch portions, said absorbent article comprising:
An absorbent pad for use in an absorbent article, said absorbent pad having a length and a width, having opposing first and second surfaces, a thickness between the first and second surfaces, and apertures extending from the first surface inwardly into said absorbent pad, said apertures forming a longitudinal aperture pattern promoting wicking of fluid along the length of said absorbent pad relative to wicking of fluid transverse to the length of said absorbent pad, a first said aperture being longitudinally spaced close enough to a second said aperture to preferentially pass liquid from said first aperture, along the length of said absorbent pad, to said second aperture by a capillary effect, thus preferentially drawing liquid along the length of said absorbent pad.
An absorbent pad for use in an absorbent article, said absorbent pad having a length and a width, a first surface, an opposing second reference surface, and a thickness between the first surface and the second reference surface, the first surface of said absorbent pad having an array of apertures therein, said apertures extending from the first surface inwardly of said absorbent pad, said apertures terminating in bottoms of the respective said apertures, each said bottom comprising an inner bottom surface thereof facing generally toward the first surface, an outer bottom surface thereof facing away from the first surface, said outer bottom surfaces extending outwardly in said absorbent pad from the second reference surface, said array of apertures forming a longitudinal pattern spaced sufficiently close to each other that an aqueous liquid is transferred from aperture to aperture by capillary effect to increase longitudinal fluid distribution, relative to distribution of fluid transverse to the length of said absorbent pad.
Dependencies are inferred from the claim text.