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AssigneeToray Industries, Inc.
InventorsKatsuhiro Miyoshi, Takashi Shimada, Takafumi Hashimoto, Tetsuya Ohara, Tomonori Iizuka, Shoji Nakashima
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A carbon fiber composite material includes the material is made of carbon fibers and a thermoplastic resin; the proportion Y, relative to the total weight of carbon fibers, of carbon fiber bundles for which Mn/(Ln×D) is 8.5×10−1 (mg/mm2) or more, is 30≦Y<90 (wt %); the average value X of Mn/Ln for the carbon fiber bundles is 1.1×10−2≦X≦8.1×10−2 (mg/mm); and Y satisfies Y≧100X+30, wherein Mn: weight of carbon fiber bundles, Ln: fiber length of carbon fibers, D: fiber diameter of carbon fibers. The carbon fiber composite material combines high flowability and mechanical properties, has few variations in mechanical properties and shows an excellent adaptability of carbon fibers for small parts such as ribs.
A carbon fiber composite material comprising carbon fibers and a thermoplastic resin, a proportion Y, relative to the total weight of carbon fibers, of carbon fiber bundles for which Mn/(Ln×D) is 8.5×10−1 (mg/mm2) or more, is 30≦Y<90 (wt %), an average value X of Mn/Ln for said carbon fiber bundles is 1.1×10−2≦X≦8.1×10−2 (mg/mm), and said Y satisfies Y≧100X +30, wherein Mn:
The carbon fiber composite material according to claim l, wherein the fiber length of carbon fibers Ln in said carbon fiber bundles is 5 to 25 mm.
Dependencies are inferred from the claim text.