Carbon fiber precursor fiber bundle, production method and production device therefor, and carbon fiber and production method therefor
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United States of America Patent
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May 17, 2011
Grant Date -
Aug 9, 2007
app pub date -
Feb 10, 2005
filing date -
Feb 13, 2004
priority date (Note) -
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Abstract
There are provided a carbon fiber precursor fiber bundle which permits easy bundling of a plurality of small tows into one bundle, is provided with a dividing capability to divide into the original small tows spontaneously at the time of firing, and is suitable for obtaining a carbon fiber that is excellent in productivity and quality, and a production method and a production apparatus of the carbon fiber precursor fiber bundle, and an excellent carbon fiber and a production method thereof. A production apparatus of a carbon fiber precursor fiber bundle, comprising an intermingling device that comprises a yarn channel having a flat rectangular section through which a plurality of small tows can pass in a manner adjacent to each other and a plurality of air jet holes disposed with predetermined intervals along the long side direction of the flat rectangle and having the openings thereof in the yarn channel.
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