a metallization and or adhesive layer is also useful which ensures intensive bonding of the metal final layer 4 to the fibres 1 the additional metal adhesive layer 3 can be applied for example galvanically or by means of thermal spraying the metallization layer 2 or the metallization layer 2 and the metal adhesive layer 3 thus form the base for the thermally sprayed metal final layer 4 according to one modification the metallization layer 2 can also be applied to the individual fibres 1 whilst the additional metal adhesive layer 3 is applied to the fibre material formed by the fibres 1 whereupon the metal final layer 4 is then applied again equally as has already been described previously a prefabricated e g commercially available fibre material can be taken as the starting point which is provided with the metallization layer 2 in a first step in this case care should be taken that the individual fibres 1 are each enclosed by the metallization layer 2 the metallization layer 2 can typically have a thickness of 0 5 u03bcm to 0 5 mm without the thickness however being restricted to this range the additional metal adhesive layer 3 can have a thickness of 2 u03bcm to 1 mm in particular of 20 u03bcm to 200 u03bcm without however being restricted to this range the metal final layer 4 can finally have a very different thickness depending on the area of application between 2 u03bcm and 20 mm preferably between 20 u03bcm and 2 mm the metal conducting layer or metallization layer 2 can contain any metals suitable for this purpose or be formed.