Crimped thermoplastic fibers for reinforcing concrete
AssigneeSpecialty Filaments, Inc.
InventorRobert R. Dill
Life of this patent
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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.
Claims5
A fiber bundle for use in reinforcing concrete said bundle including a plurality of discrete thermoplastic fibers having central axes generally aligned with each other in the same direction, an outer paper wrapper tightly confining the outer periphery of the fibers;
- said fibers having a length in the range of 1/4 inch to 4 inches;
- a diameter in the range of 4 mils to 30 mils;
- a crimp frequency of 10 to 30 crimps per inch and an amplitude in the range of 1/2 mil to 10 mils.
Dependencies are inferred from the claim text.