Patents Assigned to Weyerhaueser Company
  • Method of producing cellulose dope
    Patent number: 5605567
    Abstract: A cellulose dope prepared by subjecting a slurry of cellulose to cavitation either before, during or after treatment with a solvent. The cavitation results in the efficient fibrillization or delamination of the pulp fibers by peeling back the layers of fiber. The cavitation makes the fibers highly accessible to solvents for dissolution. One preferred cellulose solvent is sodium hydroxide at soda cellulose Q condition.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: February 25, 1997
    Assignee: Weyerhaueser Company
    Inventor: E. Peter Lancaster