A cannula, such as an implantable cannula, for an implantable blood pump is disclosed. The low-temperature and near neutral-pH precooking with an endoxylanase and endoamylase solution effects a partial hydrolysis of bran and starchy cell-walls with a controlled gelatinization and reduced conditioning and corn solid loss in wastewater. The actuating member is arranged to exert, via the unit, press forces on the thread or yarn parts which are substantially identical, on the one hand, on the different thread or yarn parts and, on the other hand, along at least part of the length of the respective thread or yarn part.