UNDERSEA CABLE, MULTILAYER TAPE FOR WATER SHIELDING LAYER OF UNDERSEA CABLE, AND METHOD FOR IMPROVING FATIGUE CHARACTERISTICS OF UNDERSEA CABLE

摘要

A power line core 13 in an undersea cable 3 includes a conducting member 15, an insulating member 17, a shield layer 19, a water shielding layer 21, an anticorrosion layer 22 and the like. The insulating member 17 is provided on an outer periphery portion of the conducting member 15. The insulating member 17 is made of, for example, crosslinked polyethylene. The shield layer 19 is provided on an outer periphery of the insulating member 17. The water shielding layer 21 is provided on an outer periphery portion of the shield layer 19. The water shielding layer 21 includes a multilayer tape 30 in which a metal layer 31 is sandwiched by resin layers 33a and 33b. The anticorrosion layer 22 is provided on an outer periphery portion of the water shielding layer 21. In the cross section of the multilayer tape 31, the metal layer 31 has a corrugated shape.