Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With decortication or mechanical preparation of textile fibers
Patent
1984-11-20
1985-12-10
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With decortication or mechanical preparation of textile fibers
162 63, 162 68, 162100, D21C 102, D21C 900
Patent
active
045578001
ABSTRACT:
A non-bonding pulp is obtained by contacting a cellulosic pulp with a non-oxidizing gaseous medium at a temperature of at least 400.degree. F. for a period of time greater than 3 seconds or more. When a cellulose pulp comprising at least about 10% hemicellulose, i.e., wood pulp, is treated thermally with a non-oxidizing gaseous medium, a novel non-alpha pulp is obtained. When formed into a substrate such as a 60-70 pound per 3000 square feet paper, the thermally treated pulp forms a non-bonding cellulosic substrate possessing (i) a void fraction of at least 0.85, (ii) a porosity of at least 30 cubic feet per minute per square foot, and (iii) sufficient tensile strength to withstand the tension of wind-up, e.g., at least 6 lbs/inch.
REFERENCES:
patent: 3479248 (1969-11-01), Nobile
patent: 3497418 (1970-02-01), Thale et al.
patent: 4081316 (1978-03-01), Aberg
patent: 4111744 (1978-09-01), Reiniger
patent: 4162768 (1979-07-01), Froats
patent: 4204906 (1969-05-01), Liu
Alvo Steve
James River Corporation
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