Special film-coated steel belt for armored cable

Abstract

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.

Description

Technical field [0001] The invention relates to a coated steel belt, in particular to a special coated steel belt for armored cables. Background technique [0002] The steel-plastic composite tape is mainly used for the outer sheath of communication optical cables and communication cables. It is bonded with the sheath material to form a comprehensive sheath, which acts as a moisture barrier to protect the cable core from moisture erosion. At the same time, it has armor for the cable core Function, resist external forces, provide mechanical protection for the laying of communication optical cables and communication cables in various applications, and ensure the stability and reliability of the application. However, during the construction of the finished cable, the steel belt and the sheath material need to be fully peeled off, that is, after the outer sheath is stripped, the steel belt coating is completely removed, leaving only the steel base belt. After the steel strip and the...

AI Technical Summary

Problems solved by technology

If there is still coating residue on the steel base belt after the sheath is stripped off, it will affect the welding effect of the steel belt and the launcher on the top of the tower

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