Polyethylene insulating steel-ethylene bonding sheath thin steel wire armored communication cable

Abstract

The invention discloses a polyethylene insulating steel-ethylene bonding sheath thin steel wire armored communication cable. The communication cable comprises a pair-twisted wire core formed by pair twisting of a plurality of wire cores, an outer side of the pair-twisted wire core is coated with a steel-polyethylene bonding protection layer, the outer side of the steel-polyethylene bonding protection layer is coated with a polyethylene inner protection layer, and the outer side of the polyethylene inner protection layer is coated with a flame-retardant polyvinyl chloride outer protection layer, and the steel-polyethylene bonding protection layer comprises components in parts by weight, 7-9 parts of steel powder, 13-18 parts of polyethylene, 2-4 parts of adhesive and 1-3 parts of plasticizer. The communication cable is advantaged in that by designing the communication cable with the multiple flame-retardant protection layers, a fire source can be effectively blocked, and problems that an existing communication cable is poor in flame-retardant performance, and when a fire occurs, the communication cable is prone to being burnt out, and communication between the place where the fire occurs and the outside world is interrupted are solved.

Description

technical field [0001] The invention relates to the field of communication cables, in particular to a polyethylene insulated steel-ethylene bonded sheath thin steel wire armored communication cable. Background technique [0002] Communication cables are cables that transmit telephone calls, telegrams, fax documents, TV and radio programs, data and other electrical signals. It consists of more than one pair of mutually insulated wires twisted together. Compared with overhead open wires, communication cables have the advantages of large communication capacity, high transmission stability, good confidentiality, and less affected by natural conditions and external interference. [0003] Existing communication cables have poor flame retardant properties. In the event of a fire, the communication cables are easily burnt, resulting in interruption of communication between the fire site and the outside world, especially in closed and harsh environments such as coal mines, which inc...

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Problems solved by technology

[0003] The flame retardant performance of existing communication cables is not good. In the event of a fire, the communication cables are easily burnt, resulting in interruption of communication between the fire site and the outside world, especially in closed and harsh environments such as coal mines, which increases the difficulty of fire rescue.

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