Reinforcement material and reinforcement structure
A reinforcement material includes a resin layer and a restraining layer. The resin layer contains a resin component and a foaming agent, and serves as a reinforcement layer for reinforcing an object. The restraining layer is disposed on the resin layer. The reinforcement layer contains a matrix resin obtained by curing the resin component and a plurality of cells generated by foaming the foaming agent. A ratio of the total area of the plurality of cells in a cross section of the reinforcement layer is 83% or more, and an elastic modulus of the matrix resin of the reinforcement layer is 1.4 GPa or more.
1 . A reinforcement material for reinforcing an object comprising:
a resin layer containing a resin component and a foaming agent and becoming a reinforcement layer for reinforcing the object, and
a restraining layer disposed on the resin layer, wherein
the resin component contains a thermosetting resin and a rubber,
a ratio of the thermosetting resin with respect to 100 parts by mass of the rubber is more than 100 parts by mass,
the thermosetting resin contains a flexible epoxy resin and an epoxy resin other than the flexible epoxy resin,
a ratio of the flexible epoxy resin in the thermosetting resin is 10% by mass or more and 45% by mass or less,
the rubber contains an acrylonitrile-butadiene rubber,
a ratio of the acrylonitrile-butadiene rubber with respect to 100 parts by mass of the flexible epoxy resin is 60 parts by mass or more,
the reinforcement layer contains a matrix resin obtained by curing the resin component and a plurality of cells generated by foaming the foaming agent,
a ratio of the total area of the plurality of cells in a cross section of the reinforcement layer is 83% or more, and
an elastic modulus of the matrix resin of the reinforcement layer is 1.4 GPa or more.
2 . A reinforcement structure comprising:
an object and
a reinforcement member having the reinforcement layer and the restraining layer according to claim 1 .
3 . The reinforcement material according to claim 1 ,
wherein the ratio of the flexible epoxy resin in the thermosetting resin is 40% by mass or less.