Modified fibers, methods and systems from shredded pulp sheets

摘要

The method of forming crosslinked cellulose comprises mixing a crosslinking agent and cellulose mat fiber pieces composed of hydrogen-bonded cellulose fibers and having a solids content of about 45-95% to provide a non-crosslinked individualized product. Effective to form a substantially homogeneous mixture of dried cellulose fibers, to dry the resulting mixture to a solids content of 85 to 100%, and then to crosslink the dried fibers to the cellulose fibers Curing under mild conditions. Some such methods may include fragmenting the cellulose fiber mat to form mat pieces. The system comprises a mixing unit (eg, high consistency) configured to form a substantially homogeneous mixture of uncrosslinked individualized cellulose fibers and crosslinker at ambient conditions from mat pieces and crosslinker. Mixer), a drying unit that dries the substantially homogeneous mixture to 85-100% consistency, and a curing unit that cures the crosslinking agent to form dried and cured crosslinked cellulose fibers.