Pitch fiber bundle and pitch type carbon fiber bundle and method for production thereof
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United States of America Patent
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Feb 13, 2001
Grant Date -
N/A
app pub date -
Mar 24, 2000
filing date -
Mar 30, 1999
priority date (Note) -
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Abstract
This invention provides a pitch fiber bundle for carbon fibers of small size, a carbon fiber bundle, and a method for the production thereof, i.e. a method for the production of carbon fibers of a small size, a pitch fiber bundle, and a carbon fiber bundle at a lower cost with higher productivity than usual. The method for the production of pitch type carbon fibers according to this invention comprises dividing a plurality of pitch fibers into not less than two bundles, intertwining the bundles by exposure to currents of air thereby forming a first fiber bundle, binding a plurality of such first fiber bundles, and again intertwining the bound pitch fiber bundles by exposure to currents of air thereby forming a second fiber bundle.
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