Patent US3751997A successfully refreshed from Google Patents.
Patent EP0343941A2 successfully refreshed from Google Patents.
EP0343941A2
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EP
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Absorbent articles with multiple layer absorbent cores
Assignee: Procter and Gamble Co
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Filing: 1989-05-23
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Granted: —
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Expires: 2009-05-23
Abstract
Abstract Absorbent articles such as disposable diapers, incontinent pads, sanitary napkins and the like that have multiple layer absorbent cores that are suitable for acquiring and containing liquids in an especially effective and efficient manner. The absorbent core comprises multiple layers including a first layer comprising hydrophilic fibrous material and having an acquisition zone of a relatively lower average density than the other portions of the first layer so that it quickly acquires discharged liquids; a liquid handling layer comprising a resilient material that is moisture insensitive so as to rapidly acquire liquid into itself through the acquisition zone and distribute the liquid throughout the liquid handling layer to a storage layer and the first layer; and a storage layer comprising a combination of fibrous material and discrete particles of absorbent gelling material that contains and stores the liquids deposited onto the absorbent core and allows the liquid handling layer to be "drained" of the liquids it has acquired so that the liquid handling layer may have sufficient capacity to acquire and distribute subsequent loadings of liquids.
Inventors
- 👤 George Stephen Reising
- 👤 Harry Bruce Bergman
- 👤 Sandra Hintz Clear
- 👤 Susan Elizabeth Guinn
- 👤 Rolando Gomez-Santiago
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 16:05
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F13/53743; A61F13/53747; A61F13/535; A61F13/53708; A61F13/53717; A61F13/51; A61F13/511; A61F13/56; A61F13/62; A61F13/15203; A61F2013/15284; A61F2013/15406; A61F2013/15422; A61F13/45; A61F13/49; A61F13/49007; A61F13/49009; A61F13/4902; A61F2013/49031; A61F2013/49068; A61F2013/49076; A61F2013/51059; A61F2013/51066; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/51411; A61F13/51474; A61F2013/51486; A61F2013/5149; A61F2013/530437; A61F2013/530445; A61F2013/530868; A61F2013/530897; A61F2013/530905; A61F2013/53721; A61F2013/53765; A61F2013/53782; A61F2013/53795; A61F2013/5666
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
203 words
A multiple layer absorbent core suitable for use in an absorbent article characterized in that said absorbent core comprises a first layer comprising hydrophilic fibrous material, preferably a mixture of hydrophilic fibrous material and from 0% to 8% by weight of discrete particles of absorbent gelling material, said first layer having a holding zone, and an acquisition zone having a lower average density, and preferably a lower average basis weight per unit area, than said holding zone, said holding zone at least partially laterally surrounding the perimeter of said acquisition zone so as to be in liquid communication with at least a portion of the lateral area of said acquisition zone; a liquid handling layer positioned subjacent at least said acquisition zone of said first layer, said liquid handling layer comprising a resilient material, preferably a resilient polymeric foam, a synthetic foam, or a batt of synthetic fibers, having gush handling capacity to receive quantities of body exudates, said liquid handling layer being moisture insensitive and having a percentage void volume greater than 80%, preferably 90%; and a storage layer positioned subjacent said liquid handling layer, said storage layer comprising a combination of hydrophilic fibrous material and discrete particles of absorbent gelling material.
Claim 2
Dependent Claim
203 words
A multiple layer absorbent core suitable for use in an absorbent article characterized in that said absorbent core comprises a first layer comprising hydrophilic fibrous material, preferably a mixture of hydrophilic fibrous material and from 0% to 8% by weight of discrete particles of absorbent gelling material, said first layer having a holding zone, and an acquisition zone having a lower average density, and preferably a lower average basis weight per unit area, than said holding zone, said holding zone at least partially laterally surrounding the perimeter of said acquisition zone so as to be in liquid communication with at least a portion of the lateral area of said acquisition zone; a liquid handling layer positioned subjacent at least said acquisition zone of said first layer, said liquid handling layer comprising a resilient material, preferably a resilient polymeric foam, a synthetic foam, or a batt of synthetic fibers, having gush handling capacity to receive quantities of body exudates, said liquid handling layer being moisture insensitive and having a percentage void volume greater than 80%, preferably 90%; and a storage layer positioned subjacent said liquid handling layer, said storage layer comprising a combination of hydrophilic fibrous material and discrete particles of absorbent gelling material.
Claim 3
Dependent Claim
33 words
An absorbent core according to Claim 1 wherein said storage layer has a storage layer acquisition aperture and said absorbent core additionally comprises a second liquid handling layer positioned subjacent said storage layer.
Claim 4
Dependent Claim
56 words
An absorbent core according to either one of claims 1 and 2 wherein said storage layer comprises a laminate of particles of absorbent gelling material enwrapped by a web of fibrous material, said laminate preferably being C-folded around said liquid handling layer, and more preferably wherein said liquid handling layer has an inverted T cross-sectional area.
Claim 5
Dependent Claim
65 words
An absorbent core according to either one of claims 1 and 2 wherein said storage layer is enwrapped with a web of material, preferably wherein said storage layer and said liquid handling layer are enwrapped with a web of material, more preferably wherein said web of material is a tissue layer, and most preferably wherein said liquid handling layer has a handling layer acquisition aperture.
Claim 6
Dependent Claim
21 words
An absorbent core according to any one of the preceding claims wherein said acquisition zone comprises one or more acquisition apertures.
Claim 7
Dependent Claim
72 words
An absorbent core according to any one of claims 1-4 wherein said acquisition zone has a density and basis weight greater than zero, and comprises a different material than said holding zone, preferably wherein said acquisition zone comprises the same material as said liquid handling layer, and most preferably wherein said acquisition zone is unitary with said liquid handling layer or is a separate piece of material incorporated into said first layer.
Claim 8
Dependent Claim
79 words
An absorbent core according to any of the preceding claims wherein said acquisition zone has a top surface area less than 50%, preferably 35%, of the total top surface area of said first layer, more preferably wherein said acquisition zone is positioned so that at least 75%, most preferably 100%, of the top surface area of said acquisition zone is positioned in the front three-fourths, preferably two-thirds, most preferably the front 10% to 60%, section of said first layer.
Claim 9
Dependent Claim
35 words
A disposable absorbent article comprising: a liquid pervious topsheet; a liquid impervious backsheet joined with said topsheet; and an absorbent core according to any of the preceding claims positioned between said backsheet and said topsheet.
Claim 10
Dependent Claim
31 words
An absorbent article according to Claim 8 wherein said topsheet is joined to said liquid handling layer through said acquisition aperture, said topsheet preferably being spray-glued to said liquid handling layer.
Claim 11
Dependent Claim
72 words
10 An absorbent article according to either one of Claims 8 or 9 additionally comprising a top tissue layer, said top tissue layer having a tissue acquisition aperture that coincides with said acquisition aperture, preferably wherein said top tissue layer comprises a first tissue layer and a second tissue layer laterally spaced from each other by at least about the width of said acquisition aperture so as to form said acquisition aperture.
References Cited (Backward Citations)
No citation records indexed.
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