Title: Process for producing convoluted, fiberized, cellulose fibers and sheet products therefrom

Abstract: A process is provided for producing novel convoluted, fiberized substantially nonfibrillated, cellulose fibers and novel sheet products from low moisture-content cellulose pulp, at a high through-put rate, which includes the application of contortive forces to a pulp mass under controlled operating conditions, wherein the feed rate, work space gap, and relative rate of movement of the working elements applying the contortive forces are correlated to maintain the work space filled with fibers under sufficient compression. Sheets made from these fibers exhibit excellent bulk, softness and absorbency properties, even when the formation process is conducted in an aqueous system, and even when substantial compacting forces are applied to the wet web processing.

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Inventors: Back, Sangho E. (Vancouver, WA, US)
Reba, Imants (Vancouver, WA, US)

Application Number: 644472
Filing Date: 1975-12-29
Publication_date: 1977-07-19
Assignee: Crown Zellerbach Corporation (San Francisco, CA)
Primary Class(es): 162/9 162/117, 162/149, 162/205, 241/28
Other Classes:
US Patent Ref:

2516384	Jul, 1950	Hill et al.	162/232.
2561013	Jul, 1951	Coghill et al.	162/232.
2943012	Jun, 1960	Dunning et al.	162/28.
3382140	May, 1968	Henderson et al.	162/28.
3596840	Aug, 1971	Blomqvist	241/28.
3661328	May, 1972	Leask	241/28.
3765611	Oct, 1973	Steiniger	241/28.
3809604	May, 1974	Estes	162/100.
3846228	Nov, 1974	Ely et al.	162/111.

Other Refs:
Primary Examiner: Bashore, S. Leon
Assistant Examiner: Smith, William F.
Attorney: Marger; Jerome S., Horton; Corwin R.