US5015245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable sanitary articles
Assignee: Procter and Gamble Co
•
Filing: 1990-04-30
•
Granted: 1991-05-14
•
Expires: 2010-04-30
Abstract
Abstract Disposable sanitary articles comprise paper treated with polycationic latexes as wet-strength agents. The paper has sufficient wet strength that it can serve as the backsheet for absorbent articles, garments, and the like. Thus, KYMENE is reacted, for example, with acrylic acid and cross-linked with styrene/butadiene to provide a polycationic latex which is used to treat paper to enhance its wet strength. Diapers, sanitary napkins, pantiliners, and the like, prepared from the foregoing materials are disclosed.
Inventors
- 👤 Isao Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:48
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51401; A61F13/51405; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/62; A61F13/15203; A61F13/15252; A61F13/511; A61F2013/15284; A61F2013/15365; A61F2013/15373; A61F2013/15382; A61F2013/51002; A61F2013/51023; A61F2013/51035; A61F2013/51441; A61F2013/5145; A61F2013/51454; A61F13/53; A61F2013/530481; A61F2013/530489; A61F2013/530583; A61F2013/530613; A61F2013/53062
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
An absorbent structure comprising a topsheet, a backsheet, and an absorbent core interposed between said topsheet and backsheet, wherein said backsheet is a paper sheet, or the like, comprising multiple cellulosic fibers and a wet-strength agent which comprises a water-insoluble latex composition comprising the reaction product of a cationic polyamide/polyamine/epichlorohydrin wet-strength resin and a reactant comprising an unsaturated polymerizable hydrocarbon moiety, said reaction product being co-polymerized with latex-forming polymerizable monomers or oligomers.
Claim 2
Dependent Claim
72 words
An absorbent structure comprising a topsheet, a backsheet, and an absorbent core interposed between said topsheet and backsheet, wherein said backsheet is a paper sheet, or the like, comprising multiple cellulosic fibers and a wet-strength agent which comprises a water-insoluble latex composition comprising the reaction product of a cationic polyamide/polyamine/epichlorohydrin wet-strength resin and a reactant comprising an unsaturated polymerizable hydrocarbon moiety, said reaction product being co-polymerized with latex-forming polymerizable monomers or oligomers.
Claim 3
Dependent Claim
30 words
An absorbent structure according to claim 1 wherein the latex-forming polymerizable monomers or oligomers in said wet-strength agent are selected from the group consisting of styrene, 1,3-butadiene, and mixtures thereof.
Claim 4
Dependent Claim
60 words
An absorbent structure according to claim 1 wherein said paper backsheet comprises cellulosic fibers and a wet-strength agent comprising the reaction product of a wet strength resin containing repeat units of the general structural type ##STR6## wherein R is ##STR7## and X is an anion, and a carboxylate reactant, said reaction product being co-polymerized with latex-forming polymerizable monomers or oligomers.
Claim 5
Dependent Claim
33 words
An absorbent structure according to claim 3 wherein said carboxylate reactant in said wet-strength agent is a member selected from the group consisting of acrylic acid, methacrylic acid, glycidyl methacrylate, and mixtures thereof.
Claim 6
Dependent Claim
29 words
An absorbent structure according to claim 4 wherein said latex-forming polymers or oligomers in said wet-strength agent are selected from the group consisting of styrene, 1,3-butadiene, and mixtures thereof.
Claim 7
Dependent Claim
62 words
An absorbent structure according to claim 5, wherein said wet-strength agent comprises the reaction product of said cationic wet-strength resin and a carboxylate reactant selected from acrylic acid, methacrylic acid, glycidyl methacrylate, and mixtures thereof, said reaction product being co-polymerized with styrene, 1,3-butadiene, and mixtures thereof, said wet-strength agent comprising from about 5% to about 30% by weight of said paper backsheet.
Claim 8
Dependent Claim
22 words
An absorbent structure according to claim 6 wherein set wet-strength agent comprises at least about 10% by weight of said paper backsheet.
Claim 9
Dependent Claim
23 words
A disposable diaper, sanitary napkin, adult incontinence garment or pantiliner according to claim 1 wherein said absorbent core comprises an absorbent gelling material.
Claim 10
Dependent Claim
25 words
An article according to claim 8 wherein the absorbent gelling material is dispersed in the form of a powder in the otherwise fibrous absorbent core.
Claim 11
Dependent Claim
26 words
An article according to claim 8 wherein the absorbent gelling material is in the form of fibers in an absorbent core which otherwise comprises cellulosic fibers.
Claim 12
Dependent Claim
21 words
A disposable diaper, sanitary napkin, adult incontinence garment or pantiliner according to claim 1 wherein said absorbent core comprises oxidized cellulose.
References Cited (Backward Citations)
US3556932A
Cited
US3556933A
Cited
US3772076A
Cited
US3700623A
Cited
US3966684A
Cited
US3860003B1
Cited
US3860003A
Cited
US3860003B2
Cited
US4054542A
Cited
US4129528A
Cited
US4233411A
Cited
US4510019A
Cited
US4808178A
Cited
US4900317A
Cited
US4610678A
Cited
US4589876A
Cited
US4589876B1
Cited
US4687478A
Cited
US4584357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |