Chemically cross-linked cellulosic fiber and method of...

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With chemical or physical modification of liberated fiber

Reexamination Certificate

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C162S012000, C162S078000, C162S158000, C162S164100, C162S184000

Reexamination Certificate

active

07419568

ABSTRACT:
The present invention relates to cross-linked cellulosic fiber having improved absorbency characteristics when compared to conventional cross-linked fibers. The cross-linked cellulosic fiber is obtainable by reacting pulp in the sheet or fluff form with one or more reagents selected from organic molecule having acid and aldehyde functional groups “acid aldehydes.” The invention also relates to a method of producing the cross-linked fiber. The method includes heating the treated cellulosic fibers to promote intrafiber cross-linking. The cross-linked fibers are characterized by having an improved centrifuge retention capacity, fluid acquisition rate, resiliency, absorbent capacity, absorbency under load, and other absorbent properties. The inventive cross-linked fibers are useful in forming absorbent composites, and in particular absorbent cores for use in absorbent articles.

REFERENCES:
patent: 2764573 (1956-09-01), Reibnitz et al.
patent: 3112156 (1963-11-01), Vail et al.
patent: 3224926 (1965-12-01), Bernardin
patent: 3241553 (1966-03-01), Steiger
patent: 3260565 (1966-07-01), Beachem
patent: 3434918 (1969-03-01), Bernardin
patent: 3700549 (1972-10-01), Croon et al.
patent: 3756913 (1973-09-01), Wodka
patent: 3932209 (1976-01-01), Chatterjee
patent: 4035147 (1977-07-01), Sangenis et al.
patent: 4204054 (1980-05-01), Lesas et al.
patent: 4472167 (1984-09-01), Welch
patent: 4820307 (1989-04-01), Welch et al.
patent: 4822453 (1989-04-01), Dean et al.
patent: 4882453 (1989-11-01), Chelsea
patent: 4888093 (1989-12-01), Dean et al.
patent: 4889595 (1989-12-01), Herron et al.
patent: 4936865 (1990-06-01), Welch et al.
patent: 5042986 (1991-08-01), Kitchens et al.
patent: 5137537 (1992-08-01), Herron et al.
patent: 5225047 (1993-07-01), Graef et al.
patent: 5264468 (1993-11-01), Miyahara
patent: 5273549 (1993-12-01), Didier et al.
patent: 5352480 (1994-10-01), Hansen et al.
patent: 5399240 (1995-03-01), Graef et al.
patent: 5720737 (1998-02-01), Hamajima et al.
patent: 5858021 (1999-01-01), Sun et al.
patent: 5938995 (1999-08-01), Koltisko, Jr. et al.
patent: 5998511 (1999-12-01), Westland et al.
patent: 6207278 (2001-03-01), Jewell et al.
patent: 6290867 (2001-09-01), Kielbania, Jr. et al.
patent: 6620293 (2003-09-01), Sears et al.
patent: 2002/0096276 (2002-07-01), Leithem et al.
patent: 2003/0070776 (2003-04-01), Crow et al.
patent: 0427316 (1997-07-01), None
patent: WO 97/04162 (1997-02-01), None
patent: WO 99/31312 (1999-06-01), None
G.C. Tesoro, Cross-Linking of Cellulose, in Handbook of Fiber Science and Technology, vol. II, M. Lewis and S.B. Sello eds, pp. 1-46, Mercel Decker, NY (1963).

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