Process for producing carbon fibers and the carbon fibers...

Details Process for producing carbon fibers and the carbon fibers... Process for producing carbon fibers and the carbon fibers...

D - Textiles, Paper

01

F

402/371, 18/6

D01F 9/14 (2006.01) C10C 3/00 (2006.01) C10C 3/02 (2006.01) D01F 9/24 (2006.01)

Patent

CA 1262007

TITLE OF THE INVENTION PROCESS FOR PRODUCING CARBON FIBERS AND THE CARBON FIBERS PRODUCED BY THE PROCESS. ABSTRACT OF THE DISCLOSURE Disclosed herein is a process for producing pitch-based carbon fibers having the specific properties comparable to those of polyacrylonitrile (PAN)-based carbon fibers, wherein an optically isotropic pitch obtained by polymerizing naphthalene at a temperature of not more than 330°C and heating the thus obtained polymeric material at a temperature of 330 to 440°C while introducing an inert gas thereinto to remove volatile components therefrom, is subjected to melt-spinning, infusibilization (thermosetting) and carbonization and the thus obtalned carbonized-fibers are subjected to heat treatment at a temperature of not less than 900°C to obtain the carbon fibers. The carbon fibers obtained by the process of the present invention have excellent mechanical properties such as tensile strength, elongation at break and Young's modulus.

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