Digital transmission flexible cable for security signal system

Abstract

The invention discloses a digital transmission flexible cable for a security signal system, which comprises three shielding line groups, wherein each shielding line group comprises two stranded single lines stranded by seven first tinned copper wires; a single line insulation layer is arranged on the external surface of each stranded single line; the two stranded single lines are wrapped and coated with a second polyester tape; the external surface of the second polyester tape is covered with a line resistance shielding layer; the external surface of the line resistance shielding layer is coated with a line resistance isolation layer; each single line insulation layer consists of an outer single line insulation layer and an inner single line insulation layer; each outer single line insulation layer comprises the following materials: 1-3% of natural color cross-linked polyethylene material and 97-99% of plastic color masterbatch; the line resistance isolation layer comprises synthetic mica paper; and the two sides of the synthetic mica paper are adhered and covered with glass fabric through silicon resin adhesive phases. The flexible cable can eliminate the influence of metal particles in the color masterbatch distributed around a conductor on an electric field, so that the transmission attenuation of the cable is reduced; mechanical and physical properties and light and heat ageing resistance of the insulation layers are improved; and performance indices of a product are increased.

Description

technical field [0001] The invention relates to the field of digital cables, in particular to a digital transmission flexible cable for a security signal system. Background technique [0002] In the signal system, the signal cable used for signal has a single-core copper conductor, and the cable shielding layer is longitudinally wrapped or wrapped with copper tape, and the armoring method of the cable is double steel tape wrapped armor. Conventional signal cables do not have the dual functions of flame retardancy and fire resistance. In the signal cable with the above structure, the conductor becomes hard and brittle due to heat, oxidation and other factors during long-term use, causing the end to be easily broken; the structural limitations of the cable make it poor in bending performance and poor in flame and fire resistance. . Contents of the invention [0003] The object of the present invention is to provide a digital transmission flexible cable for a security signa...

AI Technical Summary

Problems solved by technology

In the signal cable with the above structure, the conductor becomes hard and brittle due to heat, oxidation and other factors during long-term use, causing the end to be easily broken; the structural limitations of the cable make it poor in bending performance and poor in flame and fire resistance.

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