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Abstract

A method for producing a heating filament made of a composite material and having a longitudinal axis is provided. Carbon fibers are embedded in a matrix made of carbon and a planar structure is prepared that contains carbon fibers in a textile bond. The planar structure is impregnated with thermoplastic material, and then the impregnated planar structure is carbonized in a protective gas or vacuum while forming the composite material. The planar structure is prepared from a fiber composite material, in which plastic threads made of the thermoplastic material are incorporated into the textile bond of the planar structure. The resulting carbon heating filament provides for the smallest possible material loss in the cutting process from a large surface area, namely to form a strip-shaped semi-finished product. Also, the resulting carbon heating filament filament has a high specific electrical resistance and is distinguished by high mechanical stability.

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First Claim