| 摘要 |
A problem to be solved by the present invention is to provide a method for manufacturing a reinforcing fiber strand, which uses a simple mechanism and by which the strand is stably widened under a high-speed processing condition. The present invention solving the problem is a method for manufacturing a reinforcing fiber strand in which a strand including reinforcing fibers passes through an uneven jig and a widening jig in this order, the uneven jig including a plurality of uneven portions having notched and protrusion portions, and the strand is divided by the protruding portions. Preferably, the uneven jig may be a jig having an uneven portion of a height that is 0.01 to 10 times of a strand thickness, or the strand may pass through a convergence jig before the uneven jig. Further, the reinforcing fibers are preferably carbon fibers, and the strand width before the strand is widened may range from 1 mm to 300 mm. Preferably, the jig may be a roll or a pin. Furthermore, a strand delivering distance L, which is a distance between the uneven jig and the widening jig, preferably satisfies the following Inequality (1): L ‰¤ 20 × W
wherein L is the strand delivering distance (mm) between the uneven jig and the widening jig, and W is a fiber strand width (mm) before the strand is widened. |
