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US 8,475,631 B2Granted
Reduction of fiber knots of cellulose crosslinked fibers by using plasma pre-treated pulpsheets
AssigneeWyerhauser NR Company
InventorsAngel Stoyanov, Charles E. Miller
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Abstract
The process of making crosslinked cellulose pulp fiber comprising plasma treating a sheet of cellulose pulp fiber before the sheet is impregnated with a crosslinking formulation which comprises a crosslinking agent and a catalyst, then defiberizing the treated cellulose pulp sheet to form treated defiberized cellulose pulp, then heating and curing the treated defiberized cellulose pulp to form intrafiber crosslinked cellulose pulp fibers.
Claims10
A process of making crosslinked cellulose pulp fiber, comprising
- plasma treating at least one side of a sheet of cellulose pulp fiber, to provide a plasma treated sheet;
- wherein the plasma treatment is corona discharge (CD) and wherein the corona discharge (CD) treatment is at least 54 Watts/m2/min;
- treating the plasma treated sheet with a crosslinking agent, to provide a crosslinking agent treated sheet;
- defiberizing the crosslinking agent treated sheet to form treated defiberized cellulose pulp;
- and
- heating and curing the treated defiberized cellulose pulp to form individual intrafiber crosslinked cellulose pulp fibers, wherein the individual intrafiber crosslinked cellulose pulp fibers have a knot content that is less than individual intrafiber crosslinked cellulose pulp fibers formed with the crosslinking agent but without plasma treatment.
3 more elements
Dependencies are inferred from the claim text.