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US4596567A
Expired / Lapsed
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Perf-embossed absorbent structure
Assignee: Personal Products Co
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Filing: 1984-08-17
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Granted: 1986-06-24
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Expires: 2004-08-17
Abstract
Abstract A soft, perf-embossed, absorbent composite structure is provided which comprises an absorbing layer of a fibrous web containing at least about 200 percent by weight of superabsorbent and a wicking layer. The composite structure has a Taber stiffness value less than about 30.
Inventors
- 👤 Michael J. Iskra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:00
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/15203; A61F13/51; A61F13/511; A61F13/51104; A61F13/535; A61F13/536; A61F13/537; A61F13/53708; A61F13/53713; A61F13/53717; A61F13/53743; A61F13/53756; A61F13/539; A61F2013/15284; A61F2013/15487; A61F2013/51078; A61F2013/530131; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/53445; A61F2013/53721; A61F2013/53966
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A 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%, a wet bulk of at least about 30 cc/gm and a weight less than about 4 oz/yd and containing at least about 200% superabsorbent, and a wicking layer, said structure having a Taber stiffness value less than about 30.
Claim 2
Dependent Claim
73 words
A 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%, a wet bulk of at least about 30 cc/gm and a weight less than about 4 oz/yd and containing at least about 200% superabsorbent, and a wicking layer, said structure having a Taber stiffness value less than about 30.
Claim 3
Dependent Claim
19 words
The structure of claim 1 wherein the superabsorbent is present in an amount from about 200% to about 1500%.
Claim 4
Dependent Claim
19 words
The structure of claim 2 wherein said superabsorbent is present in an amount from about 400% to about 1200%.
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
81 words
A disposable diaper having an absorbent core comprised of a 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%, a wet bulk of at least about 30 cc/gm and a weight less than about 4 oz/yd and containing at least about 200% superabsorbent, and a wicking layer, said structure having a Taber stiffness value less than about 30.
Claim 8
Dependent Claim
81 words
A disposable diaper having an absorbent core comprised of a 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%, a wet bulk of at least about 30 cc/gm and a weight less than about 4 oz/yd and containing at least about 200% superabsorbent, and a wicking layer, said structure having a Taber stiffness value less than about 30.
Claim 9
Dependent Claim
82 words
A sanitary napkin having an absorbent core comprised of a 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%, a wet bulk of at least about 30 cc/gm and a weight less than about 4 oz/yd and containing at least about 200% superabsorbent, and a wicking layer, said structure having a Taber stiffness value less than about 30.
Claim 10
Dependent Claim
82 words
A sanitary napkin having an absorbent core comprised of a 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%, a wet bulk of at least about 30 cc/gm and a weight less than about 4 oz/yd and containing at least about 200% superabsorbent, and a wicking layer, said structure having a Taber stiffness value less than about 30.
Claim 11
Independent Claim
43 words
A method for preparing a flexible, soft absorbent composite structure which comprises: (a) drying an absorbent composite structure to a moisture content less tnan about 10% and (b) subjecting the dried structure to perf-embossing to reduce the Taber stiffness by at least 75%.
Claim 12
Independent Claim
43 words
A method for preparing a flexible, soft absorbent composite structure which comprises: (a) drying an absorbent composite structure to a moisture content less tnan about 10% and (b) subjecting the dried structure to perf-embossing to reduce the Taber stiffness by at least 75%.
Claim 13
Dependent Claim
17 words
The method of claim 8 wherein the Taber stiffness value is reduced to about 30 or less.
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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) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |