摘要:
A specific sizing agent comprising as the main component an adduct of mono- or poly-cyclic phenol with alkylene oxide is applied in a specified amount to the surface of a high-strength and high-elasticity carbon fiber or a precursor fiber thereof and then dried to prepare a reinforcing carbon fiber according to the present invention, which is then preformed into a fiber arrangement, impregnated with a precursor of matrix carbon, and carbonized to produce a high-strength and high-elesticity carbon-carbon composite material.
摘要:
A specific sizing agent comprising as the main component an adduct of mono- or poly-cyclic phenol with alkylene oxide is applied in a specified amount to the surface of a high-strength and high-elasticity carbon fiber or a precursor fiber thereof and then dried to prepare a reinforcing carbon fiber according to the present invention, which is then preformed into a fiber arrangement, impregnated with a precursor of matrix carbon, and carbonized to produce a high-strength and high-elesticity carbon-carbon composite material.
摘要:
A process for producing a carbon fiber from pitch material, which comprises melt spinning pitch material in a gaseous atmosphere to form precursory pitch fibers and bundling the precursory pitch fibers, followed by infusible treatment and carbonization and optionally by graphitization, characterized in that an aqueous emulsion of a silicone oil is applied as an oiling agent to the precursory pitch fibers prior to or during the bundling operation.
摘要:
A process for producing a pitch-based graphite fiber comprises treating a pitch fiber in an oxidative gas atmosphere to render it infusible, said pitch fiber being obtained by melt-spinning a carbon-aceous pitch, then heat-treating the infusiblized fiber at 400-750 °C in an inert gas atmosphere to obtain a precarbonized fiber substantially containing oxygen, then raising the temperature to 2,000-3,000 °C at a rate of 500 °C or higher per minute in an inert gas atmosphere and heat-treating the precarbonized fiber at the raised temperature of 2,000-3,000 °C in said inert gas atmosphere.
摘要:
A process for producing pitch carbon fibers by subjecting pitch fibers obtained by melt-spinning a carbonaceous pitch to infusiblization treatment and then to carbonization treatment or both carbonization treatment and subsequent graphitization treatment, characterized in that a dimethyl polysiloxane having a viscosity at 25°C in the range of 12,000 to 1.000.000 cSt is applied to the fibers after the infusiblization treatment, and the infusiblized fibers with the dimethyl polysiloxane thus applied thereto are then subjected to the carbonization treatment or both the carbonization treatment and the subsequent graphitization treatment.