Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With chemical or physical modification of liberated fiber
Patent
1997-09-23
1999-09-28
Silverman, Stanley S.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With chemical or physical modification of liberated fiber
1621576, 162 72, 162100, 811557, 811551, 811556, D21C 900
Patent
active
059581808
ABSTRACT:
Processes for increasing the strength of cellulosic fibers are carried out by contacting relatively dry cellulosic fibers with an agent in particulate or vapor form comprising a carboxylic acid cyclic anhydride at an elevated temperature for a time sufficient to significantly increase the bonding strength of the fibers. The treated fibers bond more readily to one another and they also hold wet and dry strength aids more strongly. Furthermore, the treatment does not significantly affect the internal chemical structure of the fibers so that paper made from the fibers exhibits overall improved dimensional stability.
REFERENCES:
patent: 3051543 (1962-08-01), Skogseid
patent: 3445330 (1969-05-01), Kulick et al.
patent: 3511874 (1970-05-01), Allan
patent: 4035229 (1977-07-01), Rave
patent: 4036682 (1977-07-01), Chan et al.
patent: 4061612 (1977-12-01), Bertozzi et al.
patent: 4088530 (1978-05-01), Chan et al.
patent: 4156628 (1979-05-01), Rave
patent: 4162188 (1979-07-01), Nakamura et al.
patent: 5137537 (1992-08-01), Herron et al.
patent: 5384012 (1995-01-01), Hazard, Jr.
patent: 5427587 (1995-06-01), Arkens et al.
patent: 5441602 (1995-08-01), Harris et al.
patent: 5520777 (1996-05-01), Shisko
patent: 5718728 (1998-02-01), Arkens et al.
An Investigation of Low Degree of Substitution Carboxymethycelluloses, Jerrold A. Walecka, Tappi, Jul., 1956, vol. 39, No. 7, pp. 458-463.
Wet End Starch: Adsorption of Starch on Cellulosic Fibers, J. Marton and T. Marton, Tappi, Dec., 1976, vol. 59, No. 12, pp. 121-124.
An Overview of Cellulose-Reactive Sizes, David H. Dumas, Tappi, Jan., 1981, vol. 64, No. 1, pp. 43-46.
Polyelectrolytes Adsorbed on the Surface of Cellulosic Materials, L. Winter, L. Wagberg, L. Odberg and T. Lindstrom, Svenska Traforskningsinstitutet, Aug. 12, 1985, 23 pages.
"The Reactivity of Alkenyl Succinic Anhydride: Its Pertinence With Respect to Alkaline Sizing," R. B. Wasser, Journal of Pulp and Paper Science, vol. 13, No. 1, Jan. 1987, pp. J29-J32.
Some Fundamental Chemical Aspects on Paper Forming, Tom Linstrom, Transactions of the Ninth Fundamental Research Symposium Held at Cambridge: Sep. 1989, pp. 311, 317-320 and 384.
"The Chemistry of Papermaking," J.C. Roberts and J. Tatham, PIRA Conference, Jan. 28-29, 1992, 27 pages.
The Effects of Temperature, pH and Alkalinity on ASA Sizing in Alkaline Papermaking, R. M. Savolainen, Tappi Proceedings,1996 Papermakers Conference, pp. 289-295.
"Acid Group Topochemistry and Fibre-to-Fibre Specific Bond Strength", D. Barzyk et al., Journal of Pulp and Paper Science, vol. 23, No. 2, Feb. 1997, pp. J59-J61.
"The Determination of Fibre Charge and Acidic Groups of Radiata Pine Pulps", J.A. Floyd et al., Nordic Pulp and Paper Research Journal, No. 1, 1993, pp. 48-52 and 67.
Hubbe Martin A.
Ruckel Erwin R.
Wagle Dinkar G.
Fortuna Jos'e A.
International Paper Company
Silverman Stanley S.
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