Process for producing a coil-shaped carbon fiber bundle
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United States of America Patent
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Feb 2, 1993
Grant Date -
N/A
app pub date -
Oct 22, 1991
filing date -
Oct 24, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a carbon fiber bundle comprising a regular coil-shaped fiber bundle and having excellent stretch characteristic. A process for producing a coil-shaped carbon fiber bundle according to the present invention comprises the steps of compositing at least two kind of pitches to spin them as single fibers, bundling the thus spun single fibers to form a fiber bundle, then infusibilizing the resulting fiber bundle under tension and carbonizing the fiber bundle.
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