Stitched carbon fiber base material and wet prepreg using same
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United States of America Patent
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Aug 30, 2016
Grant Date -
May 7, 2015
app pub date -
Jan 15, 2015
filing date -
Jul 19, 2012
priority date (Note) -
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Abstract
Each sheet material is formed by arraying carbon fiber lines, each having a predetermined width, in parallel with one another. Meanwhile, an array direction of the carbon fiber lines of each sheet material is set to form an angle in a range from ±30° to ±60° to a weaving advancing direction of a stitching yarn. Moreover, a stretch ratio of the stitched base material in its lengthwise direction in a case where a load per inch width of the stitched base material is applied in the weaving advancing direction of the stitching yarn is equal to or below 4% when the load is 5 N, and is equal to or above 10% when the load is 25 N.
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