Thermoset polyurethane matrix fiber reinforced composite
OwnerDavid E. Greeninventor
Life of this patent
Estimating the term…
Abstract
A composite fiber and resin reinforcement for strength members for use in the composite wood industry. The composite fiber and resin reinforcement is a fiber reinforced polymer (FRP) composite comprising a thermoset polyurethane resin matrix and a plurality of fibers. Typical uses will be as a reinforcing material for wood laminates, such as wood support beams (glulam), truck floors and truss fabrication.
Claims15
A reinforcing material for wood or wood-based products for increasing the useful strength of wood or for reducing the thickness, grade or weight of the wood or wood-based products without reducing the load bearing value of comparable conventional wood or wood-based products, said reinforcing material comprising:
- a fiber-reinforced composite material comprising a plurality of fibers impregnated with a resin matrix, wherein the plurality of fibers are predominantly unidirectional reinforcing fibers aligned along the longitudinal dimension of the reinforcing material and said resin matrix comprises a thermoset polyurethane resin,
- wherein a ratio of said plurality of fibers to the resin matrix is from about 50% to about 70% by volume.
A wood composite comprising;
- at least one wooden member having two surfaces disposed in substantially parallel relation to one another;
- and
- at least one reinforcing material disposed at a predetermined location adjacent said at least one wooden member, said at least one single-layered reinforcing material comprising:
- a first pair of generally opposed sides parallel to each other and a second pair of generally opposed sides parallel to each other, said two sets of sides enclosing an internal section comprising a thermoset polyurethane resin matrix and a plurality of reinforcing fibers, said first set of sides having a width greater than the width of said second set of sides, said first set of sides and said second set of sides forming an elongated flat structure,
- wherein a ratio of said plurality of fibers to the resin matrix is from about 50% to about 70% by volume.
Dependencies are inferred from the claim text.