Fiber structure for fiber-reinforced composite material

Abstract

A fiber structure includes a laminate and a selvage yarn. The laminate includes at least one warp yarn layer including warp yarns extending in a first direction and at least two weft yarn layers including weft yarns extending in a second direction. At each end section of the laminate, the selvage yarn is engaged with the weft yarns of the weft yarn layers located at opposite ends in a laminating direction. Some of the warp yarns are binding yarns that bind the warp yarn layer to the weft yarn layer. The selvage yarn is a continuous yarn. The weft yarns of the weft yarn layers located at the opposite ends in the laminating direction are spun yarns.

1 . A fiber structure for a fiber-reinforced composite material, the fiber structure comprising:
 a laminate including at least one warp yarn layer and at least two weft yarn layers, wherein the warp yarn layer includes warp yarns extending in a first direction, the warp yarns are arranged in a second direction that is orthogonal to the first direction, each of the weft yarn layers includes weft yarns that are reinforcing fiber yarns extending in the second direction, the weft yarns are arranged in the first direction, the warp yarn layer and the weft yarn layers are laminated in a laminating direction that is orthogonal to the first direction and the second direction, the laminate includes end sections that are respectively located at opposite ends in the second direction and formed by the weft yarn layers and a general section located between the end sections in the second direction; and   a selvage yarn that engages with the weft yarns of the weft yarn layer located at at least one of opposite ends in the laminating direction, wherein   at least some of the warp yarns are binding yarns that bind the warp yarn layer to the weft yarn layer by engaging with the weft yarns in the general section,   the selvage yarn is a continuous yarn, and   the weft yarns of the weft yarn layers located at the opposite ends in the laminating direction are spun yarns.   
     
     
         2 . The fiber structure for the fiber-reinforced composite material according to  claim 1 , wherein
 the binding yarns that engage with the weft yarns are continuous yarns, the weft yarns being spun yarns.   
     
     
         3 . The fiber structure for the fiber-reinforced composite material according to  claim 1 , wherein
 the weft yarns of the weft yarn layer, other than the weft yarn layers located at the opposite ends, in the laminating direction, are continuous yarns.   
     
     
         4 . The fiber structure for the fiber-reinforced composite material according to  claim 3 , wherein
 the selvage yarn is alternately engaged with each of the weft yarns of the weft yarn layer located at one of the opposite ends in the laminating direction and each of the weft yarns of the weft yarn layer located at the other one of the opposite ends in the laminating direction.