US4988345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent articles with rapid acquiring absorbent cores
Assignee: Procter and Gamble Co
•
Filing: 1988-05-24
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Granted: 1991-01-29
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Expires: 2008-05-24
Abstract
Abstract Absorbent articles such as disposable diapers, incontinent pads, sanitary napkins and the like that have absorbent cores that are suitable for rapidly acquiring and containing liquid in an especially effective and efficient manner. The absorbent core comprises a storage layer comprising hydrophilic fibrous material and discrete particles of absorbent gelling material and having an acquisition aperture so it can quickly acquire this discharged liquid; and a liquid handling layer comprising a resilient material that is mositure insensitive so to rapidly acquire liquids into itself through the acquisition aperture and distribute the liquid throughout the liquid handling layer to the storage layer. The storage layer also allows the liquid handling layer to be "drained" of the liquid that is acquired so that the liquid handling layer may have sufficient capacity to acquire and distribute subsequent loading of liquids.
Inventors
- 👤 George S. Reising
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:34
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/49; A61F13/53; A61F13/534; A61F13/537; A61F13/53708; A61F13/53713; A61F13/53717; A61F13/53743; A61F13/53747; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; A61F13/51; A61F13/511; A61F13/56; A61F13/62; 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; A61F2013/530481; A61F2013/53051; A61F2013/530518; A61F2013/530868; A61F2013/530897; A61F2013/530905; A61F2013/530927; A61F2013/530934; A61F2013/53721; A61F2013/53765; A61F2013/53782; A61F2013/5666
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
124 words
A disposable absorbent article comprising: a liquid pervious topsheet; a liquid impervious backsheet joined with said topsheet; and an absorbent core positioned between said backsheet and said topsheet, said absorbent core comprising: a storage layer comprising a web of hydrophilic fibrous material and discrete particles of absorbent gelling material, and having an acquisition aperture; and a liquid handling layer positioned subjacent at least said acquisition aperture of said storage layer so that said liquid handling layer is positioned between said storage layer and said backsheet of said absorbent article, said liquid handling layer comprising a resilient material 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 about 80%.
Claim 2
Dependent Claim
124 words
A disposable absorbent article comprising: a liquid pervious topsheet; a liquid impervious backsheet joined with said topsheet; and an absorbent core positioned between said backsheet and said topsheet, said absorbent core comprising: a storage layer comprising a web of hydrophilic fibrous material and discrete particles of absorbent gelling material, and having an acquisition aperture; and a liquid handling layer positioned subjacent at least said acquisition aperture of said storage layer so that said liquid handling layer is positioned between said storage layer and said backsheet of said absorbent article, said liquid handling layer comprising a resilient material 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 about 80%.
Claim 3
Dependent Claim
23 words
The absorbent article of claim 1 wherein said liquid handling layer has a relatively lower capillarity than said web of said storage layer.
Claim 4
Dependent Claim
17 words
The absorbent article of claim 2 wherein said liquid handling layer comprises a batt of synthetic fibers.
Claim 5
Dependent Claim
26 words
The absorbent article of claim 3 wherein said batt of synthetic fibers is bonded into an open structure with a caliper of greater than about 0.25mm.
Claim 6
Dependent Claim
24 words
The absorbent article of claim 4 wherein said batt of synthetic fibers has a void volume of at least about 5 cm 3 .
Claim 7
Dependent Claim
23 words
The absorbent article of claim 1 wherein said storage layer has a density of from about 0.1 to about 1.0 g/cm 3 .
Claim 8
Dependent Claim
24 words
The absorbent article of claim 6 wherein said storage layer has a fiber to particulate weight ratio of from about 40:60 to about 98:2.
Claim 9
Dependent Claim
14 words
The absorbent article of claim 7 wherein said hydrophilic fibers are wood pulp fibers.
Claim 10
Dependent Claim
15 words
The absorbent article of claim 1 wherein said liquid handling layer comprises a synthetic foam.
Claim 11
Dependent Claim
14 words
The absorbent article of claim 1 wherein said acquisition aperture comprises multiple acquisition apertures.
Claim 12
Dependent Claim
13 words
The absorbent article of claim 1 wherein said acquisition aperture is rectangular shaped.
Claim 13
Dependent Claim
29 words
The absorbent article of claim 1 wherein said acquisition aperture has a top surface area less than about 50% of the total top surface area of said storage layer.
Claim 14
Dependent Claim
38 words
The absorbent article of claim 1 wherein said acquisition aperture is positioned so that at least about 75% of the top surface area of said acquisition aperture is positioned in the front two-thirds section of said storage layer.
Claim 15
Dependent Claim
194 words
A disposable absorbent article comprising: a liquid pervious topsheet; a liquid impervious backsheet joined with said topsheet; and an absorbent core positioned between said backsheet and said topsheet, said absorbent core comprising: a storage layer comprising a web of hydrophilic fibrous material and discrete particles of absorbent gelling material in a fiber to particulate weight ratio of from about 40:60 to about 98:2, said web having a density of from about 0.1 g/cm 3 to about 1 g/cm 3 , said storage layer having an acquisition aperture positioned so that at least about 75% of the top surface area of said acquisition aperture is positioned in the front two-thirds section of said storage layer, said acquisition aperture having a top surface area less than about 35% of the total top surface area of said storage layer; and a liquid handling layer positioned subjacent at least said acquisition aperture of said storage layer, said liquid handling layer comprising a resilient batt of synthetic fibers having interstices to provide sufficient gush handling capacity to receive quantities of body exudates, said liquid handling layer being moisture insensitive and having a percentage void volume greater than about 90%.
Claim 16
Dependent Claim
194 words
A disposable absorbent article comprising: a liquid pervious topsheet; a liquid impervious backsheet joined with said topsheet; and an absorbent core positioned between said backsheet and said topsheet, said absorbent core comprising: a storage layer comprising a web of hydrophilic fibrous material and discrete particles of absorbent gelling material in a fiber to particulate weight ratio of from about 40:60 to about 98:2, said web having a density of from about 0.1 g/cm 3 to about 1 g/cm 3 , said storage layer having an acquisition aperture positioned so that at least about 75% of the top surface area of said acquisition aperture is positioned in the front two-thirds section of said storage layer, said acquisition aperture having a top surface area less than about 35% of the total top surface area of said storage layer; and a liquid handling layer positioned subjacent at least said acquisition aperture of said storage layer, said liquid handling layer comprising a resilient batt of synthetic fibers having interstices to provide sufficient gush handling capacity to receive quantities of body exudates, said liquid handling layer being moisture insensitive and having a percentage void volume greater than about 90%.
Claim 17
Dependent Claim
22 words
The absorbent article of claim 14 wherein said acquisition aperture is completely positioned within the front two-thirds section of said storage layer.
Claim 18
Dependent Claim
14 words
The absorbent article of claim 15 wherein said liquid handling layer comprises polyester fibers.
Claim 19
Dependent Claim
23 words
The absorbent article of claim 16 wherein said liquid handling layer has a void volume of at least about 5 cm 3 .
Claim 20
Dependent Claim
28 words
The absorbent article of claim 17 wherein said liquid handling layer has a top surface area from about 0.1 to about 1.0 times that of said storage layer.
Claim 21
Dependent Claim
25 words
The absorbent article of claim 18 wherein said storage layer has a density of from about 0.15 g/cm 3 to about 0.6 g/cm 3 .
Claim 22
Dependent Claim
13 words
The absorbent article of claim 19 wherein said acquisition aperture is rectangular shaped.
Claim 23
Dependent Claim
114 words
An absorbent core suitable for use in an absorbent article, said absorbent core comprising: a storage layer comprising a web of hydrophilic fibrous material and discrete particles of absorbent gelling material, and having an acquisition aperture positioned so that at least about 75% of the top surface area of said acquisition aperture is positioned in the front two-thirds section of said storage layer; and a liquid handling layer positioned subjacent at least said acquisition aperture of said storage layer, said liquid handling layer comprising a resilient material 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 about 80%.
Claim 24
Dependent Claim
114 words
An absorbent core suitable for use in an absorbent article, said absorbent core comprising: a storage layer comprising a web of hydrophilic fibrous material and discrete particles of absorbent gelling material, and having an acquisition aperture positioned so that at least about 75% of the top surface area of said acquisition aperture is positioned in the front two-thirds section of said storage layer; and a liquid handling layer positioned subjacent at least said acquisition aperture of said storage layer, said liquid handling layer comprising a resilient material 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 about 80%.
Claim 25
Dependent Claim
17 words
The absorbent core of claim 21 wherein said liquid handling layer comprises a batt of synthetic fibers.
Claim 26
Dependent Claim
30 words
The absorbent core claim 22 wherein said liquid handling layer has a caliper greater than about 0.25 mm and a void volume of at least about 5 cm 3 .
Claim 27
Dependent Claim
39 words
The absorbent core of claim 23 wherein said storage layer has a density of from about 0.1 g/cm 3 to about 1.0 g/cm 3 , and a fiber to particulate weight ratio of from about 40:60 to about 98:2.
Claim 28
Dependent Claim
12 words
The absorbent core of claim 24 wherein said storage layer is hourglass-shaped.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |