Apparatus for making pitch fiber infusible
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United States of America Patent
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Aug 11, 1981
Issued Date -
N/A
app pub date -
Jan 2, 1980
filing date -
Jun 30, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of producing carbon fiber by making infusible and carbonizing pitch fiber which is obtained by melt-spinning petroleum-tar pitch or coal-tar pitch, and a method of making pitch fiber infusible in an air atmosphere containing NO.sub.2, at an elevated temperature by introducing a cross-sectionally U-shaped tray with pitch fiber suspended from bars placed across an upper portion thereof into an infusible material producing furnace having gas exchanging chambers in the inlet portion and outlet portion thereof as well as at least two gas circulating means each of which comprises a combination of a blower or a fan and a heat exchanger, and retaining said tray in said furnace.
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