Patent US4888231A successfully refreshed from Google Patents.
US4888231A
Expired / Lapsed
US
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Absorbent core having a dusting layer
Assignee: Procter and Gamble Co
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Filing: 1987-06-30
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Granted: 1989-12-19
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Expires: 2007-06-30
Abstract
Abstract Airlaid fibrous webs having a primary layer having discrete particles of absorbent gelling material dispersed through at least a portion of the web airlaid over a dusting layer of essentially hydrophilic fiber material. The dusting layer acts to block the passage of particles injected in the stream of fibers forming the primary layer so as to minimize equipment plugging problems and the loss of particles or fibers through the foraminous forming element and to provide a more efficient absorbent core.
Inventors
- 👤 John J. Angstadt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:06
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/72; A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15617; A61F13/15626; D04H1/76; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/23; Y10T428/237; Y10T428/239; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T428/26; Y10T428/269
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
An absorbent article comprising: a topsheet; a liquid impervious backsheet associated with said topsheet; and a dual-layer absorbent core disposed between said topsheet and said backsheet, said dual-layer absorbent core comprising: (i) a shaped core component that quickly collects and distributes discharged body liquids, and (ii) an insert core component that absorbs and retains discharged body fluids from said shaped core component, said shaped core component being positioned between said topsheet and said insert core component, said insert core component comprising: (a) a dusting layer consisting of hydrophilic fiber material, and (b) a primary layer consisting of a combination of hydrophilic fiber material and particular amounts of discrete particles of absorbent gelling material airlaid over said dusting layer, wherein said dusting layer is relatively thinner in thickness than said primary layer, and wherein said dusting layer is disposed adjacent said backsheet.
Claim 2
Dependent Claim
141 words
An absorbent article comprising: a topsheet; a liquid impervious backsheet associated with said topsheet; and a dual-layer absorbent core disposed between said topsheet and said backsheet, said dual-layer absorbent core comprising: (i) a shaped core component that quickly collects and distributes discharged body liquids, and (ii) an insert core component that absorbs and retains discharged body fluids from said shaped core component, said shaped core component being positioned between said topsheet and said insert core component, said insert core component comprising: (a) a dusting layer consisting of hydrophilic fiber material, and (b) a primary layer consisting of a combination of hydrophilic fiber material and particular amounts of discrete particles of absorbent gelling material airlaid over said dusting layer, wherein said dusting layer is relatively thinner in thickness than said primary layer, and wherein said dusting layer is disposed adjacent said backsheet.
Claim 3
Dependent Claim
28 words
The absorbent article of claim 1 wherein said primary layer comprises a uniform combination of hydrophilic fiber material and particular amounts of discrete particles of absorbent gelling material.
Claim 4
Dependent Claim
15 words
The absorbent article of claim 2 wherein said hydrophilic fiber material consists of cellulose fibers.
Claim 5
Dependent Claim
29 words
The absorbent article of claim 3 wherein said insert core component has a top surface area from about 0.25 to about 1.0 times that of said shaped core component.
Claim 6
Dependent Claim
46 words
The absorbent article of claim 4 wherein said insert core component is positioned relative to said backsheet in a manner such that at least about 75% of the absorbent gelling material in said primary layer is found within the front two-thirds section of said absorbent article.
Claim 7
Dependent Claim
30 words
The absorbent article of claim 5, wherein said primary layer contains from about 9% to about 60% by weight of said primary layer of discrete particles of absorbent gelling material.
Claim 8
Dependent Claim
39 words
The dual-layer absorbent core of claim 6 wherein said shaped core component consists essentially of hydrophilic fiber material and from about 0% to about 8% by weight of said shaped core component of discrete particles of absorbent gelling material.
Claim 9
Dependent Claim
89 words
An absorbent article comprising: a topsheet; a liquid impervious backsheet associated with said topsheet; and an absorbent core disposed between said topsheet and said backsheet, said absorbent core comprising: (a) a dusting layer consisting of hydrophilic fibrous material, and (b) a primary layer consisting of a combination of hydrophilic fibrous material and particular amounts of discrete particles of absorbent gelling material airlaid over said dusting layer, wherein said dusting layer is relatively thinner in thickness than said primary layer, and wherein said dusting layer is positioned adjacent said backsheet.
Claim 10
Dependent Claim
89 words
An absorbent article comprising: a topsheet; a liquid impervious backsheet associated with said topsheet; and an absorbent core disposed between said topsheet and said backsheet, said absorbent core comprising: (a) a dusting layer consisting of hydrophilic fibrous material, and (b) a primary layer consisting of a combination of hydrophilic fibrous material and particular amounts of discrete particles of absorbent gelling material airlaid over said dusting layer, wherein said dusting layer is relatively thinner in thickness than said primary layer, and wherein said dusting layer is positioned adjacent said backsheet.
Claim 11
Dependent Claim
29 words
The absorbent article of claim 8 wherein said primary layer consists of a uniform combination of hydrophilic fibrous material and particular amounts of discrete particles of absorbent gelling material.
Claim 12
Dependent Claim
14 words
The absorbent article of claim 9 wherein said hydrophillic fibrous material comprises cellulose fibers.
References Cited (Backward Citations)
US3670731A
Cited
US4102340A
Cited
US4297410A
Cited
US4364992A
Cited
US4333463A
Cited
US4340556A
Cited
US4537590A
Cited
US4610678A
Cited
US4604313A
Cited
US4655757A
Cited
US4650479A
Cited
US4673402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |