Cross-linked cellulosic fibers

Abstract

Disclosed are processes for manufacturing cross-linked cellulosic fibers, as well as cross-linked fibers prepared by the same and tissue products comprising the novel cross-linked cellulosic fibers. The cross-linked fibers are manufactured by reacting an oxidized sugar having at least two aldehyde groups with a plurality of cellulosic fibers to yield treated fibers and heating the treated fibers at a temperature greater than about 140° C. to cure the treated fibers. The instant cross-linked fibers are manufactured without well-known cross-linking agents such as formaldehyde or polycarboxylic acids. As such the present cross-linked cellulosic fibers have good brightness and color and resist yellowing. Further, the cross-linked cellulosic fibers are generally free from off odors. Like prior art cross-linked fibers however, the instant cross-linked cellulosic fibers have enhanced properties, such as improved wet bulk, compared to uncross-linked fibers.

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