| 摘要 |
A dry fiber preform having a plurality of fiber layers held together via one or more non-woven, thermoplastic veils. The thermoplastic veils are heated and slightly melted during manufacture of the preform, and serve to hold the various woven fiber layers of the preform adjacent one another without stitching, clamping or tackifiers that could otherwise disrupt the flow of resin when the preform is subjected to a subsequently performed resin transfer molding process. The thermoplastic veils also serve to significantly improve the post-impact strength of the preform. The use of the thermoplastic veils allows the woven fiber layers to be secured to one another on the fly as the fiber layers are placed over a mold or tool and heated.
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