FIBER-REINFORCED RESIN COMPOSITE MATERIAL AND METHOD FOR PRODUCING SAME
The purpose of the present invention is to inhibit a decrease in strength attribute to the interface between a simple-shape portion and a complicated-shape portion. This fiber-reinforced resin composite material comprises: a simple-shape portion formed from at least one sheet-shaped prepreg material obtained by impregnating reinforcing fibers with a resin; and a complicated-shape portion obtained by impregnating reinforcing fibers with a resin, the complicated-shape portion having been integrated with the simple-shape portion. The resin used for the preprg material comprised the same components as the resin used for the complicated-shape portion.
1 . A fiber-reinforced resin composite material comprising:
a simple-shape portion formed of at least one sheet of a prepreg material composed of a reinforcing fiber impregnated with a resin; and
a complex-shape portion formed of a reinforcing fiber impregnated with a resin, the complex-shape portion being integrally formed with the simple-shape portion, wherein
the resin used in the prepreg material and the resin used in the complex-shape portion comprise a same component(s).
2 . The fiber-reinforced resin composite material of claim 1 , wherein
the resin used in the prepreg material and the resin used in the complex-shape portion are a benzoxazine resin composition.
3 . The fiber-reinforced resin composite material of claim 2 , wherein
the benzoxazine resin composition comprises a compound containing in its molecule a benzoxazine ring represented by a formula (1), an epoxy resin, a curing agent and a toughness enhancing agent:
wherein R 1 represents a chain alkyl group of 1 to 12 carbons, a ring alkyl group of 3 to 8 carbons, a phenyl group or a phenyl group substituted with a chain alkyl group of 1 to 12 carbons or a halogen; and a hydrogen atom is bonded to at least one of carbon atoms at an ortho position and a para position of a carbon atom that bonds the oxygen atom of the aromatic ring in the formula.
4 . A method for producing a fiber-reinforced resin composite material, comprising:
forming a simple-shape portion from at least one sheet of a prepreg material formed of a reinforcing fiber impregnated with a resin; and
forming a complex-shape portion integrally with the simple-shape portion, the complex-shape portion being formed of a reinforcing fiber impregnated with a resin, wherein
the resin used in the prepreg material and the resin used in the complex-shape portion comprise a same component(s).
5 . The method for producing the fiber-reinforced resin composite material of claim 4 , wherein
the resin used in the prepreg material and the resin used in the complex-shape portion are a benzoxazine resin composition.
6 . The method for producing the fiber-reinforced resin composite material of claim 5 , wherein
the benzoxazine resin composition comprises a compound containing in its molecule a benzoxazine ring represented by a formula (1), an epoxy resin, a curing agent and a toughness enhancing agent:
wherein R 1 represents a chain alkyl group of 1 to 12 carbons, a ring alkyl group of 3 to 8 carbons, a phenyl group or a phenyl group substituted with a chain alkyl group of 1 to 12 carbons or a halogen; and a hydrogen atom is bonded to at least one of carbon atoms of the aromatic ring at an ortho position and a para position relative to the carbon atom that bonds the oxygen atom in the formula.