Special film-coated steel belt for armored cable

The invention discloses a special film-coated steel belt for an armored cable. The special film-coated steel belt comprises a steel belt layer and a plastic film layer, one or two of the upper surfaceand the lower surface of the steel belt layer is or are coated with the plastic film layer, and the plastic film layer is prepared from the following materials in parts by weight: 65-80 parts of an ethylene-vinyl acetate copolymer, 10-25 parts of a hydrogenated styrene-butadiene segmented copolymer, 5-12 parts of polypropylene resin, 3-10 parts of white mineral oil, 2-6 parts of an ethylene acrylic acid copolymer, 2-5 parts of nano calcium carbonate, 0.3-1 part of 3,3'-dilauryl thiodipropionate, 0.1-0.5 part of 2,2-oxamido-bis[ethyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)] propionic ester and 0.1-0.3 part of pigment. After the special film-coated steel belt for the armored cable is made into an optical cable, a cable core wrapped with the special film-coated steel belt is protected againstmoisture erosion, meanwhile, after being bent for multiple times, the special film-coated steel belt can still have good toughness and does not crack, a plastic film is easily completely stripped fromthe steel belt together with a protecting cover on the outer side of the plastic film, and the situations of tearing, shredding and the like are avoided.