Polymer fibers for concrete reinforcement
AssigneeSika Technology AG
InventorsFabian Frei, William Durall, Carl Labbe
Life of this patent
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Abstract
A macro-synthetic fiber includes three or more partially fused filaments made of a polymer composition including at least one polypropylene, wherein the fiber has a multi-lobal cross-sectional shape with three or more lobes. A method produces macro-synthetic fibers, a cementitious material includes a binder and macro-synthetic fibers, and a method for forming a concrete surface uses a concrete mixture modified with the macro-synthetic fibers.
Claims17
A macro-synthetic fiber consisting of three or more partially fused filaments made of a polymer composition comprising:
- at least one polypropylene;
- and
- at least 1 wt.-% of at least one polyethylene, based on a total weight of the polymer composition;
- wherein the fiber has a multi-lobal cross-sectional shape with three or more lobes and a central section of the fiber is solid.
A method for producing macro-synthetic fibers comprising steps of:
- I) extruding a molten polymer composition comprising:
- at least one polypropylene to provide undrawn fibers consisting of three or more partially fused filaments,
- at least 1 wt.-% of at least one polyethylene, based on a total weight of the polymer composition,
- wherein the macro-synthetic fibers have a multi-lobal cross-sectional shape with three or more lobes and a central section of the macro-synthetic fibers is solid
- II) uniaxially drawing the undrawn fibers prepared in step I) to provide drawn fibers,
- III) optionally crimping the drawn fibers prepared in step II) to provide crimped fibers, and
- IV) cutting the fibers prepared in step II) or III) to a pre-determined length.
Dependencies are inferred from the claim text.