US5134007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple layer absorbent cores for absorbent articles
Assignee: Procter and Gamble Co
•
Filing: 1991-05-01
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Granted: 1992-07-28
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Expires: 2011-05-01
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 S. Reising
- 👤 Bruce H. Bergman
- 👤 Sandra H. Clear
- 👤 Susan E. Guinn
- 👤 Rolando Gomez-Santiago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:49
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F13/53708; A61F13/53717; A61F13/535; A61F13/53743; A61F13/53747; A61F13/51; A61F13/511; A61F13/514; A61F13/56; A61F13/62; A61F13/622; A61F13/627; A61F2013/00361; A61F2013/00795; A61F2013/00817; A61F2013/00821; A61F13/45; A61F13/49; A61F13/49007; A61F13/49009; A61F13/4902; A61F2013/49031; A61F2013/49068; A61F2013/49076; A61F2013/530437; A61F2013/530445; A61F2013/530868; A61F2013/530897; A61F2013/530905; A61F2013/53721; A61F2013/53765; A61F2013/53791; A61F2013/53795; A61F2013/5666; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24322; Y10T428/24331; Y10T428/24942; Y10T428/24992
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
A multiple layer absorbent core suitable for use in an absorbent article, said absorbent core comprising: a first layer comprising hydrophilic fibrous material, a holding zone, and an acquisition zone having a lower average density 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 having gush handling capacity to receive sufficient quantities of body exudates, said liquid handling layer being moisture insensitive and having a percentage void volume greater than about 80%; 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
151 words
A multiple layer absorbent core suitable for use in an absorbent article, said absorbent core comprising: a first layer comprising hydrophilic fibrous material, a holding zone, and an acquisition zone having a lower average density 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 having gush handling capacity to receive sufficient quantities of body exudates, said liquid handling layer being moisture insensitive and having a percentage void volume greater than about 80%; 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
22 words
The absorbent core of claim 1 wherein said liquid handling layer comprises a batt of synthetic fibers bonded into an open structure.
Claim 4
Dependent Claim
14 words
The absorbent core of claim 2 wherein said acquisition zone comprises an acquisition aperture.
Claim 5
Dependent Claim
29 words
The absorbent core of claim 3 wherein said first layer comprises from 0% to about 8%, by weight, of said first layer of discrete particles of absorbent gelling material.
Claim 6
Dependent Claim
32 words
The absorbent core of claim 4 wherein said batt of synthetic fibers has a caliper greater than about 0.25 mm and a void volume of at least about 0.5 cm 3 .
Claim 7
Dependent Claim
12 words
The absorbent core of claim 5 wherein said first 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) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |