Patents Assigned to Specialty Filaments
  • Crimped thermoplastic fibers for reinforcing concrete
    Patent number: 5985449
    Abstract: A crimped thermoplastic fiber for use in reinforcing concrete has a length in the range of 1/4 inch to 4 inches; an outer diameter in the range of 4 mils to 30 mils; a crimp frequency of 10-30 crimps per inch and an amplitude in the range of 1/2 mil-10 mils. The invention also includes a cylindrical bundle of the aforementioned fibers retained within an outer paper wrapper that dissolves and/or disintegrates within a concrete mixer in which the wrapped bundles are dispersed.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: November 16, 1999
    Assignee: Specialty Filaments
    Inventor: Robert R. Dill