Manufacture of carbon fibres

Details Manufacture of carbon fibres Manufacture of carbon fibres

1978-05-04

1980-04-08

Meros, Edward J.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

264 292, 4234472, 4234476, D01F 914

Patent

active

041972821

ABSTRACT:
The invention relates to a process for the manufacture of carbon and/or graphite fibres from natural organic fibres, obtained particularly from the distillation residues of coal or petroleum, by irradiation by microwaves.
The process according to the invention consists in subjecting the fibres to a preparatory thermal treatment up to a temperature of between 300.degree. and 1500.degree. C. in an inert atmosphere, for example of nitrogen, argon, helium or hydrogen and then irradiating them with microwaves.
The microwaves may have frequencies between 900 and 30,000 MHz and preferably between 2000 and 15,000 MHz and use a power of between 10W and 30kW and preferably between 50W and 10kW. The irradiation is preferably also in an inert atmosphere, for a period ranging from 10 seconds to 15 minutes. The fibres may be oxidized for example in an atmosphere of oxygen, ozone or air up to a temperature of between 100.degree. and 250.degree. C. before the preparatory thermal treatment.
The carbon and/or graphite fibres thus obtained, having an improved breaking strength, are used particularly for the reinforcement of plastic materials.

REFERENCES:
patent: 3595946 (1971-07-01), Joo et al.
patent: 3607063 (1971-09-01), Douglas
patent: 3702054 (1972-11-01), Araki et al.
patent: 3919376 (1975-11-01), Schulz
patent: 3974264 (1976-08-01), McHenry

Affiliated with

Also associated with

Rating

Manufacture of carbon fibres does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manufacture of carbon fibres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacture of carbon fibres will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-973542