| 摘要 |
This three-dimensional fiber structure (11) comprises: a laminated fiber layer (12) in which first and second fiber layers (12a, 12b) that are each composed of filaments are stacked and which exhibits at least biaxial orientation; and a binding yarn (13) which has portions that are arranged in a direction crossing the first and second fiber layers (12a, 12b) and by which the laminated fiber layer (12) is bound. A spiral yarn is used as the binding yarn (13). |
