Modified cellulose from chemical kraft fiber and methods of making and using the same
AssigneeGP Cellulose GmbH
InventorsArthur J. Nonni, Charles E. Courchene, Christopher Michael Slone, Peter R. Abitz
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Abstract
A modified kraft pulp fiber with unique properties is provided. The modified fiber can be a modified bleached kraft fiber that is almost indistinguishable from its conventional counterpart, except that it has a low degree of polymerization (DP). Methods for making the modified fiber and products made from it are also provided. The method can be a one step acidic, iron catalyzed peroxide treatment process that can be incorporated into a single stage of a multi-stage bleaching process. The products can be chemical cellulose feedstocks, microcrystalline cellulose feedstocks, fluff pulps and products made from them.
Claims31
A bleached kraft fiber exhibiting an aldehyde content ranging from about 1 meq/100 g to about 9 meq/100 g, a carboxyl content of at least about 3 meq/100 g, a 0.5% capillary CED viscosity of less than about 10 mPa·s, an ISO brightness of at least about 88, and a length-weighted average fiber length of at least about 2 mm.
Dependencies are inferred from the claim text.