Amino-functionalized pulp fibers

Details Amino-functionalized pulp fibers Amino-functionalized pulp fibers

2005-08-30

2005-08-30

Chin, Peter (Department: 1731)

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With chemical or physical modification of liberated fiber

C162S100000, C162S158000, C162S164600, C162S168200, C162S182000, C162S183000

Reexamination Certificate

active

06936136

ABSTRACT:
The disclosed invention is directed to pulp fibers suitable for forming a wet-laid paper product which include amino-functionality which is non-extractable in an aqueous phase. The pulp fibers may be prepared by applying an amino-functional additive to a fibrous web prior to the finishing operation at a pulp mill. The fibrous web may then be repulped at a papermaking machine to form a paper web which includes the amino-functionalized fibers of the present invention. A paper web formed of the amino-functionalized fibers may display unique and/or improved reactivity toward certain papermaking additives. For instance, the paper webs of the disclosed invention may show dry tensile strength increases of greater than 40% when treated with a permanent wet strength agent such as a polyamine epichlorohydrin wet strength agent, whereas a paper web which does not include the amino-functionalized fibers of the present invention may show less than a 20% increase in strength properties when treated with the same strength agents.

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