Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2008-06-30
2010-11-16
Hug, Eric (Department: 1791)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S177000, C264S109000, C264S140000, C536S097000, C536S098000, C536S106000
Reexamination Certificate
active
07833384
ABSTRACT:
A method for making fibers having particles attached thereto, comprising blending a carboxyalkyl cellulose and a starch in water to provide an aqueous gel; treating the aqueous gel with a first crosslinking agent to provide a crosslinked gel; drying the crosslinked gel to provide a solid; comminuting the solid to provide a plurality of particles; combining at least a portion of the plurality of particles with a aqueous dispersion comprising cellulose fibers and a first water-miscible solvent and, optionally, a second crosslinking agent, to provide a mixture comprising swollen particles and cellulose fibers; and adding a second water-miscible solvent to the mixture to provide fibers having particles attached thereto.
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Chin Peter
Crawford John M.
Hug Eric
Weyerhaeuser NR Company
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