Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1976-11-17
1978-06-06
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 4, 162 21, 162 22, 162 56, 162 57, 162243, 68 43, 366156, 366179, 366287, D21C 102, D21C 110, D21C 502
Patent
active
040935078
ABSTRACT:
Cellulose fibers are treated by providing the fibers in a 10-90% concentration in liquid, and applying elastic pressure shocks to the fibers for a duration not exceeding one second and of a magnitude causing the pressure in the interior of the fibers to exceed 0.2 atmospheres excess pressure. Thereafter the fibers are permitted to expand. The pressure shocks cause liquid to be expelled from the fibers without permanent deformation of the fibers occurring. When the fibers expand, liquid is adsorbed. These steps are repeated until the fibers are completely impregnated with liquid. This prevents the formation of fiber knots when the fibers are substantially dried before being formed into paper. The elastic pressure shocks can be applied by a rotating paddle wheel which intermittently elastically compresses the fibers against an elastic surface of a container.
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Witham, Sr., "Modern Pulp and Paper Making," 1942, New York, p. 358.
Casey, "Pulp and Paper," Interscience Publishers, N.Y., 1960, pp. 990-994.
Matzke, "Repulping of Printed Waste Paper by Flotation of Printing Ink (Deirking)," Escher Wyss News, vol. 44, pp. 70-79, 1971.
Alvo Steve
Bashore S. Leon
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