Abstract: A honeycomb structure (1) comprises a plurality of small tubes (2) bonded to each other along their sides. The small tubes (2) have a base body (4) made of a thermoplastic and which, at least on the outside, preferably on the outside and on the inside, carries a coating (5) made of an adhesively-active thermoplastic material. As a result of this coating (5), a good bonding of the small honeycomb tubes (2) to each other as well as to a cover layer (3) is possible.