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Title:
SIZING AGENT-COATED CARBON FIBER BUNDLE, METHOD FOR MANUFACTURING SAME, PREPREG, AND CARBON FIBER-REINFORCED COMPOSITE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2016/117422
Kind Code:
A1
Abstract:
Provided are a sizing agent-coated carbon fiber bundle that has excellent mechanical characteristics when used as a carbon fiber-reinforced composite material, as well as excellent ease of handling; a method for manufacturing the same; and a prepreg and carbon fiber-reinforced composite material of excellent mechanical characteristics, employing the fiber bundle. The carbon fiber bundle is coated with a sizing agent that includes a polyether aliphatic epoxy compound having two or more epoxy groups per molecule and/or a polyol aliphatic epoxy compound or a non-water-soluble compound having a glass transition temperature of -100-50°C, wherein the sizing agent-coated carbon fiber bundle is characterized in that the flatness ratio (width/thickness) of the carbon fiber bundle cross section is 10-150, and a two edge part/center part sizing agent deposition ratio, obtained by dividing the carbon fiber bundle in the width direction along the fiber direction into three equal parts by mass, and computing the ratio from the ratio of the mass of the sizing agent to the mass of the carbon fiber bundle in the center part and in both end parts, is 1.05-1.5.

Inventors:
HIASA TAKUMI (JP)
KOBAYASHI DAIGO (JP)
ICHIKAWA TOMOKO (JP)
Application Number:
PCT/JP2016/050777
Publication Date:
July 28, 2016
Filing Date:
January 13, 2016
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
D06M13/11; C08J5/24; D06M15/70; D06M101/40
Foreign References:
JP2008095222A2008-04-24
JPH079444A1995-01-13
JP2009191425A2009-08-27
JP2003336129A2003-11-28
CN104195766A2014-12-10
Other References:
See also references of EP 3208376A4
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