Hollow cylindrical carbon fiber structure

摘要

The present invention relates to a hollow cylindrical carbon fiber structure, comprising a carbon fiber nonwoven that is circumferentially connected between the inner surface and the outer surface of the carbon fiber structure. It is obtainable by a method in which a hollow cylindrical starting fiber structure, which comprises a nonwoven fabric which is circumferentially connected between the inner surface and the outer surface of the starting fiber structure, is subjected to pyrolysis.