Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Filaments
Patent
1983-12-16
1989-03-21
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Filaments
26421117, 425461, 4234471, D01F 912
Patent
active
048141216
ABSTRACT:
A method for producing high strength, high modulus filament yarns of carbon fibers is provided by subjecting a mesophase-containing pitch to aging, separating (purifying) the resulting 100% mesophase and subjecting 100% mesophase to melt-spinning at 250.degree. to 350.degree. C. by using spinning nozzles having a greater cross-sectional area in the outlet part than the cross-sectional area in the narrowest inside the nozzles and further to thermosetting and carbonization whereby carbon fibers having a random (shape), turbulent flow shape or rather onion shape of carbon arrangement in cross-section are obtained.
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Kashima Oil Company Limited
Lorin Hubert C.
Silbaugh Jan H.
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