High-wet-bulk cellulosic fibers
AssigneeWeyerhaeuser Company
InventorsRichard A. Jewell, John A. Westland
Life of this patent
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Abstract
The present invention provides cellulosic fibers having high wet bulk and methods for their preparation. In one embodiment, the invention provides cellulosic fibers catalytically crosslinked with glyoxal and, optionally, a glycol. In another embodiment, cellulosic fibers are crosslinked with a combination of glyoxal and a glyoxal-derived resin selected from the group consisting of a glyoxal/polyol condensate, a cyclic urea/glyoxal/polyol condensate, a cyclic urea/glyoxal condensate, and mixtures thereof.
Claims14
Individualized, crosslinked cellulosic fibers comprising cellulosic fibers treated with an amount of glyoxal, propylene glycol, aluminum sulfate, and citric acid, effective to provide crosslinked fibers having a wet bulk greater than about 20 cc/g at 0.6 kPa.
Individualized, crosslinked cellulosic fibers comprising cellulosic fibers treated with an of glyoxal and a glyoxal-derived resin selected from the group consisting of a glyoxal/polyol condensate, a cyclic urea/glyoxal/polyol condensate, a cyclic urea/glyoxal condensate, and mixtures thereof, effective to provide crosslinked fibers having a wet bulk greater than about 20 cc/g at 0.6 kPa.
Dependencies are inferred from the claim text.