Method of making carbon fibers and resin-impregnated carbon fibe

Details Method of making carbon fibers and resin-impregnated carbon fibe Method of making carbon fibers and resin-impregnated carbon fibe

1977-02-24

1978-07-11

Meros, Edward J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156181, 156271, 4234472, 4234474, 4234476, 4234478, 264 292, B32B 3118, D01F 922

Patent

active

041000048

ABSTRACT:
A multifilament sheet, tow or web of acrylonitrile precursor fibres are passed through a pre-heat zone at a temperature at least 100.degree. C below the critical temperature. The material is then passed through a two-stage oxygenation zone comprising a first stage at 220.degree. to 250.degree. C and a second stage at 260.degree. to 300.degree. C. The material passes straight through the oxygenation zone and is held in sufficient uniform tension to stretch the fibres during heating and oxygenation. The oxygenated material is then passed through a carbonizing zone comprising at least one stage at 1050.degree. to 1600.degree. C under non-oxidizing conditions. The resulting carbon fibre has a mean Young's modulus of at least 25 .times. 10.sup.6 p.s.i. and a mean tensile strength of at least 250,000 p.s.i.

REFERENCES:
patent: 3533743 (1970-10-01), Prescott et al.
patent: 3539295 (1970-11-01), Ram
patent: 3552923 (1971-01-01), Carpenter et al.
patent: 3700511 (1972-10-01), Whitney et al.
patent: 3723157 (1973-03-01), Druin
patent: 3914960 (1975-10-01), McGuffin et al.

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