FIBER-REINFORCED COMPOSITE MATERIAL
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United States of America Patent
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Issued Date -
Jan 8, 2015
app pub date -
Feb 12, 2013
filing date -
Feb 15, 2012
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Abandoned
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Abstract
A fiber-reinforced composite material can achieve dynamical properties at high levels, and can simultaneously improve Mode I interlaminar fracture toughness GIC and Mode II interlaminar fracture toughness GIIC. The fiber-reinforced composite material has a plurality of reinforcing-fiber-containing layers and an interposing resin layer between adjacent reinforcing-fiber-containing layers. The resin layer is composed of a cured product of a resin composition containing a compound having a benzoxazine ring of formula (1), epoxy resin, a curing agent, a toughness improver, and polyamide 12 powder. The composite material has a GIC of not lower than 300 J/m2, and a GIIC of not lower than 1000 J/m2:
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