US3844880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 17:21
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)
US2944931A
Cited
US3102838A
Cited
US3193446A
Cited
US3527719A
Cited
US3480016A
Cited
US3554863A
Cited
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 |