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US 12,571,217 B2Granted
Natural fiber composite construction materials
OwnerColin Christopher Felton, Deepak Shresthainventors
Life of this patent
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Abstract
Natural fiber composite construction materials including boards, siding, railroad ties, standing seam roofing panels, roofing panels that support solar-electric modules, and roofing panels that support vegetation are provided. In various embodiments, composite construction materials comprise about 50-60% kenaf fiber.
Claims15
A device comprising:
- a body comprising a fiber-reinforced polymer composite, a longitudinal axis, a first end and a second end along the longitudinal axis, a void space within the body, the composite comprising a polymer matrix, a first fiber reinforcement, and a second fiber reinforcement;
- wherein the polymer matrix comprises polyethylene;
- wherein the first fiber reinforcement comprises hemp fibers, the hemp fibers have an aspect ratio of about 5:1 to 100:1 dispersed within the polymer matrix, and the hemp fibers comprise between about 50% to about 60% of the composite;
- and
- wherein the second fiber reinforcement comprises fibers extending from the first end to the second end.
2 more elements
A decking board comprising:
- a structural shell having at least one void therein, the structural shell comprising high-density polyethylene and about 60% hemp fibers, about 2% inorganic pigment, about 0.1% synergistic hindered amine light stabilizer (HALS), about 0.05% phenolic antioxidant, about 0.05% phosphite heat stabilizer, about 3% magnesium hydroxide fire retardant, about 1% zinc borate fungicide, and about 2% maleic anhydride grafted polyethylene coupling agent, wherein the hemp fibers have an aspect ratio of about 5:1 to 100:1.
A siding board comprising:
- a structural shell having at least one void formed by a concave portion thereof, the structural shell comprising polypropylene and about 60% hemp fibers, about 3% inorganic pigment, about 0.1% hindered amine light stabilizer (HALS) ultraviolet (UV) stabilizer, about 0.1% antioxidant, about 5% magnesium hydroxide fire retardant, about 1% zinc borate fungicide, and about 2% maleic anhydride grafted polypropylene coupling agent, wherein the hemp fibers have an aspect ratio of about 5:1 to 100:1.
A railroad tie comprising:
- a structural shell having at least two substantially parallel voids extending parallel to a central axis of the structural shell, the structural shell comprising polyethylene and about 60% hemp fibers, about 1% carbon black, about 0.1% antioxidant or heat stabilizer, about 1% zinc borate fungicide, and about 2% maleic anhydride grafted polyethylene coupling agent, wherein the hemp fibers have an aspect ratio of about 5:1 to 100:1;
- and a plurality of blocks disposed within the two substantially parallel voids equi-distant from the ends, the plurality of blocks comprising about 50% rice hulls, about 48% recycled post-consumer high density polyethylene (HDPE), and about 2% maleic anhydride grafted HDPE.
A device comprising:
- a body comprising a fiber-reinforced polymer composite, a longitudinal axis, a first end and a second end along the longitudinal axis, a void space within the body, the composite comprising a polymer matrix, a first fiber reinforcement, and a second fiber reinforcement;
- wherein the polymer matrix comprises polypropylene;
- wherein the first fiber reinforcement comprises hemp fibers, the hemp fibers have an aspect ratio of about 5:1 to 100:1 dispersed within the polymer matrix, and the hemp fibers comprise between about 50% to about 60% of the composite;
- and
- wherein the second fiber reinforcement comprises fibers extending from the first end to the second end.
2 more elements
Dependencies are inferred from the claim text.