STITCHED UNIDIRECTIONAL OR MULTI-AXIAL REINFORCEMENT AND A METHOD OF PRODUCING THE SAME

摘要

A stitched unidirectional or multi-axial reinforcement and a method of producing a stitched unidirectional or multi-axial reinforcement includes transversely arranging thin discrete flow passage forming means having a diameter of 70-300 μm in a direction transverse to the direction of the unidirectional rovings at least on the continuous rovings of the at least one layer, and stitching the thin discrete flow passage forming means and the continuous unidirectional rovings to one another to form a reinforcement.

主权项

1. A stitched unidirectional or multi-axial reinforcement for the manufacture of fiber reinforced composites by one of resin transfer molding process and vacuum infusion molding process, the stitched unidirectional or multi-axial reinforcement comprising:
at least one layer of continuous unidirectional rovings arranged in the reinforcement, and a resin flow facilitator which, when wetting-out a stack of reinforcements with resin, facilitates a flow of resin in a direction transverse to a direction of the unidirectional rovings, wherein the resin flow facilitator includes thin discrete flow passages having a diameter of 70 μm to 300 μm, the thin discrete flow passages being arranged transverse to the unidirectional rovings, and the thin discrete flow passages extending from one edge of the stitched unidirectional or multi-axial reinforcement to an opposite edge of the reinforcement, the at least one layer and the thin discrete flow passages being bonded to each other by stitching.