Carbon fiber prepeg for wood reinforcement, wooden sheet laminated therewith, wood reinforcing composite comprising carbon fibers and the wooden sheet, and carbon fiber reinforced wood
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United States of America Patent
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Sep 11, 2001
Grant Date -
N/A
app pub date -
Sep 14, 1998
filing date -
Mar 22, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The first group of the present invention is a wood reinforcing carbon fiber prepreg, which is produced through impregnation with a mixture resin at a viscosity of 3 to 150 poises at 20.degree. C., wherein the mixture resin contains one or more resins selected from resorcinol based resins and resol type phenol based resins, formaldehydes as curing agents and inorganic acids or organic acids as curing catalysts. The first group of the present invention is a wood reinforcing carbon fiber prepreg having a longer usable time and being capable of imparting the rigidity and elastic modulus of carbon a fiber to the wood to be reinforced at a high ratio. The second group of the present invention is a wood reinforcing carbon fiber prepreg attached wood based sheet, wherein a wood based sheet of a thickness of 0.01 mm to 0.06 mm is arranged on at least one face of a carbon fiber prepreg sheet produced through impregnation with a mixture resin containing a thermosetting resin and a curing agent or a curing catalyst. The second group of the present invention is a carbon fiber prepreg sheet, or a carbon fiber prepreg attached wood based sheet produced through the attachment of the strand, or a carbon fiber composite wood based sheet produced by curing them, characterized in that it has excellent adhesivity and handleability with no occurrence of environmental pollution when applied to wood and glued laminated lumbers, to impart the rigidity and elastic modulus of carbon fiber to the wood to be reinforced at a high ratio.
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