OPTICAL CABLE PROVIDED WITH A MECHANICALLY RESISTANT COVERING

摘要

The present invention relates to an optical cable comprising at least one element for the transmission of optical signals, and a structure that is abl e to protect said at least one element. Said structure is a multilayer structu re and is arranged in a position radially external to said at least one element and comprises: a) at least one first covering layer of polymeric material in a position radially external to said at least one element; b) at least one covering layer of foamed polymeric material in a position radially external to said at least one first covering layer, and c) at least one second covering layer of polymeric material in a position radially external to said at least one covering layer of foamed polymeric material. The foamed polymeric materi al has a density between 0.3 and 0.7 kg/dm3 and tensile modulus at 20~C between 300 and 700 MPa. The present invention further relates to a multilayer structure of the type as above and a method for the protection of at least o ne element for the transmission of optical signals.