US4605402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Softening of a composite absorbent product
Assignee: Personal Products Co
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Filing: 1984-08-17
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Granted: 1986-08-12
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Expires: 2004-08-17
Abstract
Abstract A softened, absorbent, composite structure is provided which structure is comprised of a fibrous web containing at least about 200 percent by weight of superabsorbent and containing a wicking layer subjected to microcorrugating in at least one direction and perf-embossing to yield an absorbent composite structure having a Taber stiffness value less than about 25, preferably less than about 10.
Inventors
- 👤 Michael J. Iskra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/535; A61F13/536; A61F13/15203; A61F13/537; A61F13/53708; A61F13/53713; A61F13/5376; A61F13/531; A61F13/532; A61F13/533; A61F13/539; A61F2013/15284; A61F2013/15487; A61F2013/15536; A61F2013/530131; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/530868; A61F2013/530927; A61F2013/530934; A61F2013/530941; A61F2013/53445; A61F2013/53721; A61F2013/53966
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
A microcorrugated, perf-embossed, absorbent composite structure comprising an absorbing layer comprised of a fibrous web having an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, a wet bulk of at least about 30 cc/gm., and a weight less than about 4 oz/sq. yd., and containing at least about 200 percent superabsorbent and a wicking layer, said structure having a Taber stiffness value less than about 25.
Claim 2
Dependent Claim
77 words
A microcorrugated, perf-embossed, absorbent composite structure comprising an absorbing layer comprised of a fibrous web having an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, a wet bulk of at least about 30 cc/gm., and a weight less than about 4 oz/sq. yd., and containing at least about 200 percent superabsorbent and a wicking layer, said structure having a Taber stiffness value less than about 25.
Claim 3
Dependent Claim
21 words
The structure of claim 1 wherein the superabsorbent is present in an amount from about 200 percent to about 1500 percent.
Claim 4
Dependent Claim
21 words
The structure of claim 2 wherein said superabsorbent is present in an amount from about 400 percent to about 1200 percent.
Claim 5
Dependent Claim
14 words
The structure of claim 1 wherein said fibrous web is a polyester nonwoven web.
Claim 6
Dependent Claim
15 words
The structure of claim 1 wherein said wicking layer is comprised of wood pulp fibers.
Claim 7
Dependent Claim
15 words
The structure of claim 1 wherein said Taber stiffness value is less than about 10.
Claim 8
Dependent Claim
85 words
A disposable diaper having an absorbent core comprised of a microcorrugated, perf-embossed composite structure comprising an absorbing layer comprised of a fibrous web having an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, a wet bulk of at least about 30 cc/gm., and a weight less than about 400 oz/sq. yd., and containing at least about 200 percent superabsorbent and a wicking layer, said structure having a Taber stiffness value less than about 25.
Claim 9
Dependent Claim
85 words
A disposable diaper having an absorbent core comprised of a microcorrugated, perf-embossed composite structure comprising an absorbing layer comprised of a fibrous web having an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, a wet bulk of at least about 30 cc/gm., and a weight less than about 400 oz/sq. yd., and containing at least about 200 percent superabsorbent and a wicking layer, said structure having a Taber stiffness value less than about 25.
Claim 10
Dependent Claim
85 words
A sanitary napkin having an absorbent core comprised of a microcorrugated, perf-embossed composite structure comprising an absorbing layer comprised of a fibrous web having an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, a web bulk of at least about 30 cc/gm., and a weight less than about 400 oz/sq. yd., and containing at least about 200 percent superabsorbent and a wicking layer, said structure having a Taber stiffness value less than about 25.
Claim 11
Dependent Claim
85 words
A sanitary napkin having an absorbent core comprised of a microcorrugated, perf-embossed composite structure comprising an absorbing layer comprised of a fibrous web having an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, a web bulk of at least about 30 cc/gm., and a weight less than about 400 oz/sq. yd., and containing at least about 200 percent superabsorbent and a wicking layer, said structure having a Taber stiffness value less than about 25.
Claim 12
Independent Claim
47 words
A method for preparing a flexible, soft, absorbent composite structure which comprises drying an absorbent composite structure to a moisture content less than about 10 percent and subjecting the dried structure to microcorrugating followed by perf-embossing to reduce the Taber stiffness value to less than about 25.
Claim 13
Independent Claim
47 words
A method for preparing a flexible, soft, absorbent composite structure which comprises drying an absorbent composite structure to a moisture content less than about 10 percent and subjecting the dried structure to microcorrugating followed by perf-embossing to reduce the Taber stiffness value to less than about 25.
Claim 14
Dependent Claim
17 words
The method of claim 9 wherein the Taber stiffness value is reduced to about 10 or less.
References Cited (Backward Citations)
US26151A
Cited
US2788003A
Cited
USRE26151E
Cited
US4102340A
Cited
US4186165A
Cited
US4340057A
Cited
US4500315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |