Patent US4585449A successfully refreshed from Google Patents.
US4585449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable diaper with improved top sheet
Assignee: Colgate Palmolive Co
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Filing: 1985-04-22
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Granted: 1986-04-29
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Expires: 2005-04-22
Abstract
Abstract A disposable product, such as a diaper, sanitary napkin or underpad, provided with a water impervious lower layer, an absorbent pad and a top sheet. The top sheet contains 0.1 to 0.6% by weight of a surfactant. The surfactant may be applied by spraying, printing, roller coating, etc., on the entire surface or, preferably, in limited areas such as in the central areas of the top sheet, or pay be line or spot printed thereon to improve fluid penetration, while retaining optimum fluid wetback and fluid retention characteristics. The top sheet is a hydrophobic sheet of excellent fluid penetration but resists fluid wetback.
Inventors
- 👤 Hamzeh Karami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:48
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/513; A61F13/51305; A61F13/51113; A61F13/84; A61F13/8405; A61F2013/51059; A61F2013/51061
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
A hydrophobic top sheet for a disposable product, said top sheet being permeable and being of spun-bonded hydrophobic fibers being free of any binder and being selected from the group consisting of polyamide, polypropylene and polyester fibers and mixtures thereof, and from 0.1 to 0.6% by weight of a surfactant printed on the top surface of said top sheet to facilitate fluid passage therethrough but minimize wetback, said top sheet having a maximum wetback facter of 10 and a penetraction factor of at least about 80, said surfactant not extending below said top surface, said surfactant being printed in spaced spots.
Claim 2
Dependent Claim
101 words
A hydrophobic top sheet for a disposable product, said top sheet being permeable and being of spun-bonded hydrophobic fibers being free of any binder and being selected from the group consisting of polyamide, polypropylene and polyester fibers and mixtures thereof, and from 0.1 to 0.6% by weight of a surfactant printed on the top surface of said top sheet to facilitate fluid passage therethrough but minimize wetback, said top sheet having a maximum wetback facter of 10 and a penetraction factor of at least about 80, said surfactant not extending below said top surface, said surfactant being printed in spaced spots.
Claim 3
Dependent Claim
25 words
A top sheet for a disposable product according to claim 1, wherein said surfactant is printed on the central areas only of said top sheet.
References Cited (Backward Citations)
US4077410A
Cited
US4056103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |