Crimped carbon fiber and production method thereof
AssigneeShowa Denko K.K.
InventorsEiji Kambara, Katsuyuki Tsuji
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Abstract
A crimped carbon fiber having a multilayer structure comprising a hollow structure in the inside, with the inner layer part having a carbon structure containing a herringbone structure and the outer layer part having a carbon structure differing from the carbon structure of the inner layer part. A method for producing a crimped carbon fiber, comprising contacting a carbon source and/or a catalyst source with a sulfur source in a heating zone to produce a vapor grown carbon fiber, wherein the ratio of the molar number of sulfur atom in the sulfur source to the molar number of the catalyst metal atom is 2.0 or more.
Claims10
A crimped carbon fiber having a multilayer structure comprising an inner layer part and an outer layer part with a hollow structure in the inside thereof, the inner layer part having a carbon structure containing a herringbone structure, the outer layer part having a carbon structure differing from the carbon structure of the inner layer part.
A crimped carbon fiber having a multilayer structure comprising a center part and an outer layer part outside the center part with no hollow structure inside thereof, the center part having a carbon structure containing a shape that carbon layers vertical to the carbon fiber axis are stacked, the outer layer part having a carbon structure differing from the carbon structure of the center part.
Dependencies are inferred from the claim text.