Prepreg and carbon fiber reinforced composite materials
AssigneeToray Industries, Inc.
InventorsNobuyuki ARAI, Norimitsu NATSUME, Kenichi YOSHIOKA, Junko KAWASAKI, Hiroshi TAKEZAKI
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Abstract
A prepreg containing a carbon fiber [A] and a thermosetting resin [B], and in addition, satisfying at least one of the following (1) and (2). (1) a thermoplastic resin particle or fiber [C] and a conductive particle or fiber [D] are contained, and weight ratio expressed by [compounding amount of [C] (parts by weight)]/[compounding amount of [D] (parts by weight)] is 1 to 1000. (2) a conductive particle or fiber of which thermoplastic resin nucleus or core is coated with a conductive substance [E] is contained.
Claims10
A prepreg containing a thermosetting resin [B], a carbon fiber [A] impregnated with the thermosetting resin [B], conductive particles or fibers [E] included in the thermosetting resin [B] and conductive fillers having smaller average diameter than the average diameter of the conductive particles or fibers [E], wherein [E] localizes around surface portion of the prepreg, wherein the conductive fillers are mixed in the thermosetting resin [B], wherein the conductive particles have thermoplastic resin nucleus coated with a conductive substance and the conductive fibers have thermoplastic resin cores coated with the conductive substance, wherein strain energy release rate of the thermoplastic resin constituting [E] determined by compact tension method defined in ASTM D 5045-96 by using a resin plate made of the press-molded thermoplastic resin is 1500 to 50000 J/m2, and a volume ratio of [E] expressed by [volume of nucleus or core]/[volume of conductive layer] is 0.1 to 500.
Dependencies are inferred from the claim text.