Sizing agent-coated carbon fiber bundle, carbon fiber bundle production method, and prepreg
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United States of America Patent
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Sep 6, 2016
Grant Date -
Dec 17, 2015
app pub date -
Jan 22, 2014
filing date -
Jan 25, 2013
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Abstract
A sizing agent-coated carbon fiber bundle has a sizing agent containing an aliphatic epoxy compound (C) and an aromatic epoxy compound (D) coated on the carbon fiber bundle, wherein the carbon fiber in the carbon fiber bundle is the one which exhibits, when measured by single-fiber composite fragmentation method, a number of fiber breaks of at least 2.0/mm when apparent single-fiber stress is 15.3 GPa and the number of fiber breaks of up to 1.7/mm when the apparent single-fiber stress is 12.2 GPa.
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