Fiber reinforced composite structural laminate composed of two layers tied to one another by embedded fibers bridging both layers
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United States of America Patent
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Dec 30, 1980
Grant Date -
N/A
app pub date -
Apr 30, 1979
filing date -
Apr 30, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a structural laminate having a plastic surface finish coat laminated to a structural base which has exceptional bond strength between the structural base and the plastic layer with which it interfaces. The structural base comprises a glass reinforced gypsum layer. The plastic laminate portion comprises a plastic surface finish coat, preferably a polyester gel coat or an acrylic resin, bonded to a reinforcing layer of curable polyester or epoxy resin reinforced with glass fibers. The reinforcing layer is adhered to a bonding layer which comprises glass fibers protruding from the reinforcing layer and coated with a limited amount of organic resin such as polyester or epoxy resin. The glass reinforced gypsum layer is applied to the protruding fibers of the bonding layer to form an interface having a bond strength of at least about 150 psi as determined by ASTM C297-68.
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