Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Simultaneous mechanical defibration and chemical treatment
Patent
1994-02-15
1995-10-03
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Simultaneous mechanical defibration and chemical treatment
162 28, 162 82, D21B 116
Patent
active
054549078
ABSTRACT:
A refining assisting agent comprising sulfonated chitosan has been provided. With the addition of the sulfonated chitosan according to the present invention, power needed in the refining can be remarkably reduced compared with that needed in the conventional refining. In addition, the refining assisting additive improves paper strength.
REFERENCES:
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patent: 5229504 (1993-07-01), Hayashi
Rydholm "Pulping Processes"; Interscience Publishing; New York, Sep. 1967, pp. 424-425.
Abstract Bulletin of the Institute of Paper Chemistry, vol. 62, No. 6, Dec. 1991, Appleton US, p. 653; Nicol, S.: "Life after death for empty shells", Abstract No. 6602.
Abstract Bulletin of the Institute of Paper Chemistry, vol. 49, No. 11, May 1979, Appleton US, p. 1045; Allan, G. G. et al.: "Chitosan-mediator for fiber-water interactions in paper", abstract No. 9641.
Patent Abstracts of Japan, vol. 014, No. 559 (C-0787) 12 Dec. 1990 & JP-A-02 240 101 (Lion Corp.) 25 Sep. 1990.
Wolfrom, M. L., et al, JACS 81, 1764 (1959), "The Sulfonation of Chitosan".
Alvo Steve
Japan PMC Corporation
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