Patent US3901236A successfully refreshed from Google Patents.
US3901236A
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Disposable absorbent articles containing hydrogel composites having improved fluid absorption efficiencies and processes for preparation
Assignee: Glad Products Co
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Filing: 1974-07-29
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Granted: 1975-08-26
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Expires: 1994-07-29
Abstract
Abstract Hydrogel composites are provided having improved fluid absorption efficiencies which render them especially useful in disposable absorbent articles, such as diapers, catamenial devices and the like. The hydrogels are in particulate form, each particle or agglomerate of particles being substantially coated with fibers, a portion of which fibers extend from the particle. The fibers enhance the rate at which the hydrogel absorbs aqueous fluids and also serve to maintain the fluid in close proximity to the hydrogel. The extended fibers serve to anchor the hydrogel particle when it is contained in a fibrous or cellular matrix.
Inventors
- 👤 Per G Assarsson
- 👤 Paul A King
- 👤 Steven N Yen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:31
CPC Classifications
F; F21; F21S; F21S2/00; A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/42; A61L15/425; A61L15/60; A61F13/20; A61F13/2002; A61F13/202; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/530583; A61F2013/530802; F21Y; F21Y2103/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
113 words
A disposable absorbent article for body exudate having fibrous coated hydrogel particles as at least one of the absorbents contained therein; said particles having: a. improved in situ fluid absorption efficiencies over the corresponding non-coated particles, b. a particle size distribution such that essentially all of said coated hydrogel particles pass through a five mesh screen as measured on U.S. Standard Sieve Series, c. a coating of fibers, which fibers have an average length of less than about 5.0 millimeters and an average ratio of length to diameter of at least about 5:1, and d. at least some of said fibers having a portion thereof extending outwardly from the surface of said particles.
Claim 2
Dependent Claim
113 words
A disposable absorbent article for body exudate having fibrous coated hydrogel particles as at least one of the absorbents contained therein; said particles having: a. improved in situ fluid absorption efficiencies over the corresponding non-coated particles, b. a particle size distribution such that essentially all of said coated hydrogel particles pass through a five mesh screen as measured on U.S. Standard Sieve Series, c. a coating of fibers, which fibers have an average length of less than about 5.0 millimeters and an average ratio of length to diameter of at least about 5:1, and d. at least some of said fibers having a portion thereof extending outwardly from the surface of said particles.
Claim 3
Dependent Claim
45 words
The disposable absorbent article of claim 1 wherein said fibrous coated hydrogel particles have at least some of said fibers having a portion thereof extending outwardly from the surface of said particles and defining a means for essentially imobilizing said particles in a fibrous matrix.
Claim 4
Dependent Claim
13 words
The disposable absorbent article of claim 2 wherein said fibrous matrix is cellulosic.
Claim 5
Dependent Claim
14 words
The disposable absorbent article of claim 2 wherein said fibrous matrix is wood fiber.
Claim 6
Dependent Claim
40 words
The disposable absorbent article of claim 1 wherein said fibrous coated hydrogel particles have at least some of fibers having a portion thereof extending outwardly from the surface of said particles and essentially imobilizing said particles in a cellular matrix.
Claim 7
Dependent Claim
14 words
The disposable absorbent article of claim 5 wherein said cellular matrix is a foam.
Claim 8
Dependent Claim
15 words
The disposable absorbent article of claim 5 wherein said cellular matrix is a polyurethane foam.
Claim 9
Dependent Claim
12 words
The disposable absorbent article of claim 1 which is a catamenial device.
Claim 10
Dependent Claim
12 words
The disposable absorbent aRticle of claim 1 which is a sanitary napkin.
Claim 11
Dependent Claim
11 words
The disposable absorbent article of claim 1 which is a tampon.
Claim 12
Dependent Claim
11 words
The disposable absorbent article of claim 1 which is a diaper.
Claim 13
Dependent Claim
20 words
The disposable absorbent article of claim 1 wherein said particles are coated with at least one type of hydrophilic fibers.
Claim 14
Dependent Claim
32 words
The disposable absorbent article of claim 1 wherein said particles are coated with at least one type of hydrophobic fibers wherein at least a portion of said fiber has been rendered hydrophilic.
Claim 15
Dependent Claim
27 words
The disposable absorbent article of claim 1 wherein said particles are coated with at least one type of hydrophilic and at least one type of hydrophobic fibers.
Claim 16
Dependent Claim
28 words
The disposable absorbent article of claim 14 wherein at least a portion of said hydrophobic fiber has a portion thereof extending outwardly from the surface of said particles.
Claim 17
Dependent Claim
16 words
The disposable absorbent article of claim 1 wherein said hydrogel particles are coated with synthetic fibers.
Claim 18
Dependent Claim
14 words
The disposable absorbent article of claim 16 wherein said synthetic fibers are nylon flocs.
Claim 19
Dependent Claim
14 words
The disposable absorbent article of claim 16 wherein said synthetic fibers are rayon flocs.
Claim 20
Dependent Claim
16 words
The disposable absorbent article of claim 1 wherein said hydrogel particles are coated with natural fibers.
Claim 21
Dependent Claim
15 words
The disposable absorbent article of claim 19 wherein said natural fibers are wood pulp fibers.
Claim 22
Dependent Claim
15 words
The disposable absorbent article of claim 19 wherein said natural fibers are cotton linter flocs.
Claim 23
Dependent Claim
14 words
The disposable absorbent article of claim 19 wherein said natural fibers are cellulose flocs.
Claim 24
Dependent Claim
18 words
The disposable absorbent article of claim 1 wherein said fibers are a mixture of synthetic and natural fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |