Method for manufacturing pitch-based carbon fiber
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United States of America Patent
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N/A
Issued Date -
Feb 6, 2003
app pub date -
Aug 1, 2002
filing date -
Aug 2, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a method for manufacturing pitch-based carbon fiber by melt-spinning a mesophase pitch having optical anisotropy by using nozzles each equipped with an introduction hole entry portion, an introduction hole, an approach portion, and a discharge hole, and then applying thereto infusibilization, carbonization, or graphitization, wherein the mesophase pitch is passed through a plurality of contraction holes disposed in a substantially straight line in the introduction hole entry portion of each nozzle, then expanded in the introduction hole, and thereafter contracted in the approach portion and then spun by being passed through the discharge hole.
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