Patent US3844880A successfully refreshed from Google Patents.
US3844880A
Expired / Lapsed
US
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Sequential addition of a cationic debonder, resin and deposition aid to a cellulosic fibrous slurry
Assignee: Kimberly Clark Tissue Co
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Filing: 1973-07-20
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Granted: 1974-10-29
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Expires: 1993-07-20
Abstract
Abstract Cellulosic sheet materials are produced from a slurry comprising cellulosic fibers to which there is added sequentially a cationic surface active agent, a resin selected from the group consisting of acrylic emulsions and anionic styrene-butadiene latexes and a deposition aid for the resin.
Inventors
- 👤 F Meisel
- 👤 K Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:00
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/37; D21F; D21F11/00; D21F11/14; D21H17/35; D21H23/00; D21H23/76; D21H23/765
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
81 words
IN A METHOD OF PRODUCING A WATER-LAID CELLULOSIC SHEET MATERIAL, THE IMPROVEMENT WHICH COMPRISES ADDING TO A SLURRY COMPRISING CELLULOSE FIBERS; A CATIONIC SURFACE ACTIVE AGENT AS A DEBONDER; AT LEAST ONE ANIONIC OR NONIONIC RESIN SELECTED FROM THE GROUP CONSISTING OF ACRYLIC EMULSIONS AND ANIONIC STYRENE BUTADIENE LATEXES; AND A DEPOSITION AID FOR THE RESIN IN WHICH THE DEPOSTION AID, THE RESIN AND THE DEBONDER ARE SEQUENTIALLY ADDED TO THE DIFURNISH AND THEN FORMING A CELLULOSIC SHEET FROM SAID SLURRY.
Claim 2
Dependent Claim
81 words
IN A METHOD OF PRODUCING A WATER-LAID CELLULOSIC SHEET MATERIAL, THE IMPROVEMENT WHICH COMPRISES ADDING TO A SLURRY COMPRISING CELLULOSE FIBERS; A CATIONIC SURFACE ACTIVE AGENT AS A DEBONDER; AT LEAST ONE ANIONIC OR NONIONIC RESIN SELECTED FROM THE GROUP CONSISTING OF ACRYLIC EMULSIONS AND ANIONIC STYRENE BUTADIENE LATEXES; AND A DEPOSITION AID FOR THE RESIN IN WHICH THE DEPOSTION AID, THE RESIN AND THE DEBONDER ARE SEQUENTIALLY ADDED TO THE DIFURNISH AND THEN FORMING A CELLULOSIC SHEET FROM SAID SLURRY.
Claim 3
Dependent Claim
19 words
A method, as claimed in claim 1, in which the resin in the furnish is a nonionic acrylic emulsion.
Claim 4
Dependent Claim
20 words
A method, as claimed in claim 1, in which the resin in the furnish is an anionic styrene butadiene latex.
Claim 5
Dependent Claim
16 words
A method, as claimed in claim 3, in which the latex is a carboxylated styrene butadiene.
Claim 6
Dependent Claim
16 words
A method, as claimed in claim 1, in which the cellulosic fibers are wood pulp fibers.
Claim 7
Dependent Claim
22 words
A method, as claimed in claim 1, in which the cellulosic fibers are a combination of wood pulp fibers and synthetic fibers.
Claim 8
Dependent Claim
15 words
A method, as claimed in claim 6, in which the synthetic fibers are rayon fibers.
Claim 9
Dependent Claim
24 words
A method, as claimed in claim 1, in which a quaternized imidazoline is added to the furnish as a deposition aid for the resin.
Claim 10
Dependent Claim
22 words
A method, as claimed in claim 1, in which the cationic surface active agent in the furnish is a quaternary ammonium compound.
Claim 11
Dependent Claim
16 words
A method, as claimed in claim 9, in which the quaternary ammonium compound is an imidazoline.
Claim 12
Dependent Claim
18 words
A method, as claimed in claim 9, in which the quaternary ammonium compound is an alkyl ammonium salt.
Claim 13
Dependent Claim
17 words
A method, as claimed in claim 1, in which the deposition aid is a vinyl imidazoline polymer.
Claim 14
Dependent Claim
34 words
A method, as claimed in claim 1, in which the amount of resin in the furnish is equal to from about 3.0 to about 15.0 percent of the oven-dry weight of the fibers employed.
Claim 15
Dependent Claim
31 words
A method, as claimed in claim 1, in which the amount of debonder is equal to from about 0.15 to about 2.0 percent of the oven-dry weight of the fibers employed.
Claim 16
Dependent Claim
32 words
A method, as claimed in claim 1, in which the amount of deposition aid is equal to from about 0.1 to about 3.0 percent of the oven-dry weight of the fibers employed.
Claim 17
Dependent Claim
33 words
A method, as claimed in claim 8, in which the amount of deposition aid employed is equal to from about 0.1 to about 3.0 percent of the oven-dry weight of the fibers employed.
Claim 18
Dependent Claim
31 words
A method, as claimed in claim 8, in which the furnish comprises wood pulp fibers, a cationic surface active agent, a deposition aid for the resin, and an anionic acrylic emulsion.
Claim 19
Dependent Claim
27 words
A method, as claimed in claim 1, in which the debonder is added to the slurry prior to the addition of the deposition aid and the resin.
References Cited (Backward Citations)
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Cited
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |