| 摘要 |
A three-dimensional fiber-reinforced composite includes a laminate having fiber bundle layers that are laminated in the laminating direction and include first and second outermost layers, a matrix resin, a primary retention yarn, a secondary retention yarn, and a binding yarn. The binding yarn includes a fold-back section that is folded back such that the fold-back section passes through the outside in the laminating direction of the primary retention yarn, primary and secondary traverse yarn sections that are connected to the fold-back section and extend in the laminating direction between the primary retention yarn and the secondary retention yarn in the laminate, a surface yarn section that extends along the surface of the second outermost layer in the direction substantially perpendicular to the secondary retention yarn, and a bifurcated section that is formed on the surface of the second outermost layer and connected to the primary traverse yarn section and the secondary traverse yarn section. The bifurcated section is formed by crossing the surface yarn section that extends in opposite directions in the outside in the laminating direction of the secondary retention yarn. |
