Patents Assigned to Purdue Research Foundation, Division of Sponsored Programs
  • High strength cellulose fiber or film
    Patent number: 5290349
    Abstract: The present invention relates to the production of high tensile strength, solvent-spun cellulose fiber which is stable in alkaline solutions. More particularly, the invention relates to a process in which cellulose is solubilized in a zinc chloride solution then extruded into a coagulation medium in which the cellulose fibers form. The fibers are removed from the coagulation medium, treated to remove the coagulation medium, stretched and recrystallized in water, thus forming the high tensile strength, solvent-spun cellulose fibers.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: March 1, 1994
    Assignee: Purdue Research Foundation, Division of Sponsored Programs
    Inventor: Li Fu Chen
  • Production of high strength cellulose fiber using zinc chloride, organic solvents and aqueous solution
    Patent number: 4999149
    Abstract: The present invention relates to the production of high tensile strength, solvent-spun cellulose fiber which is stable in alkaline solutions. More particularly, the invention relates to a process in which cellulose is solubilized in a zinc chloride solution then extruded into a coagulation medium in which the cellulose fibers form. The fibers are removed from the coagulation medium, treated to remove the coagulation medium, stretched and recrystallized in water, thus forming the high tensile strength, solvent-spun cellulose fibers.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: March 12, 1991
    Assignee: Purdue Research Foundation, Division of Sponsored Programs
    Inventor: Li Fu Chen