Patent ID: 9193840
Filing Date: 2015-11-24
Classification: C08J

Abstract:
1. A composite material comprising: carbon fibers having an average fiber length of more than about 10 mm and about 100 mm or less; and a thermoplastic resin, wherein the carbon fibers are substantially two-dimensionally-randomly oriented in the composite material, wherein the composite material comprises a carbon fiber bundle (A) in a ratio of about 30 volume % or more and less than about 90 volume % to a total volume of the carbon fibers, the carbon fiber bundle (A) including the carbon fibers of a critical single fiber number defined by formula (1) or more, and wherein an average number (N) of the carbon fibers in the carbon fiber bundle (A) satisfies formula (2), wherein D is an average fiber diameter (μm) of the carbon fibers.