To obtain a three-dimensional fiber structure which is relatively simply produced, has a high density and a heat conductivity required when made into a reinforcing material of a composite material to be used as a heat radiation member.
This three-dimensional fiber structure 1 is constituted of rods 2 inserted into a three-dimensional wove fabric F. The three-dimensional woven fabric F comprises a laminated yarn group 5 in which a plurality of (x) yarn layers 3 and a plurality of (y) yarn layers 4 of yarns arranged mutually in parallel are laminated so as to form an in-plane biaxial orientation and yarns (z) in the thickness direction arranged in the direction intersecting at right angles with the (x) yarn layers 3 and the (y) yarn layers 4 of the laminated yarn group 5, and has a constitution of the yarns arranged in the triaxial directions. The rods 2 are inserted in parallel with the yarns Z in the thickness direction. The rods 2 are composed of a fiber-reinforced composite material using carbon fiber as a reinforcing fiber and formed in the same length as the thickness of the three-dimensional fabric F. The arranged (x) yarns and (y) yarns and the yarns (z) in the thickness direction are obtained by using carbon fiber.
HORI FUJIO
KAMIYA RYUTA
