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US 12,000,066 B2Granted
Cross-linked cellulosic fibers
OwnerMichael Andrew Zawadzki, Stephen Michael Lindsayinventors
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OwnerMichael Andrew Zawadzki, Stephen Michael Lindsayinventors
Estimating the term…
Disclosed are processes for manufacturing cross-linked cellulosic fibers and tissue products comprising cross-linked cellulosic fibers, manufactured by reacting an oxidized polyol, in particular, 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. In particular, said sugar is sucrose and the oxidising agent comprises hydrogen peroxide. The instant cross-linked fibers are manufactured without well-known cross-linking agents such as formaldehyde or polycarboxylic acids, and have good brightness and color and resist yellowing. Furthermore, the cross-linked cellulosic fibers are generally free from off odors and the instant cross-linked cellulosic fibers have enhanced properties, such as improved wet bulk, compared to uncross-linked fibers.
A method of manufacturing cross-linked wood pulp fibers comprising the steps of providing a plurality of wood pulp fibers, forming the plurality of wood pulp fibers into a mat having a fiber consistency from about 1.0 to about 10 percent, treating the mat with an oxidized polyol to yield treated wood pulp fibers and drying the treated wood pulp fibers at a temperature from about 140 to about 200° C. to yield a dried cross-linked wood pulp fibers having a consistency greater than about 90 percent.
Dependencies are inferred from the claim text.