Process of making a carbon fiber precursor fiber bundle
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United States of America Patent
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Aug 12, 2014
Grant Date -
Mar 22, 2012
app pub date -
Apr 7, 2011
filing date -
Feb 13, 2004
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Abstract
A production method for a carbon fiber precursor fiber bundle and a production apparatus of the carbon fiber precursor fiber bundle. A carbon fiber precursor fiber bundle that has a degree of intermingle of 1 m−1 or less between small tows, consists of substantially straight fibers without imparted crimp, a tow of which straight fibers has a moisture content of less than 10% by mass when housed in a container, and has a widthwise dividing capability to maintain a form of a single aggregate of tows when housed in a container, taken out from the container and guided into a firing step, and to divide into a plurality of small tows in the firing step by the tension generated in the firing step.
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