The present invention relates to a coating for cables which is capable of
protecting the cable against accidental impacts. By inserting into the
structure of a power transmissioncable a suitable coating of expanded
polymer material of adequate thickness, preferably in contact with the
sheath of outer polymer coating, it is possible to obtain a cable which
has a high impact strength. The Applicant has moreover observed that an
expanded polymer material used as a coating for cables makes it possible
to obtain a higher impact strength for this cable than using a similar
coating based on the same polymer which is not expanded. A cable with a
coating of this type has various advantages over a conventional cable with
metal armor, such as, for example, easier processing, a reduction in the
weight and dimensions of the finished cable and a lower environmental
impact as regards recycling of the cable once its working cycle is over.
