Flame-retardant cable and cable flame-retardant layer forming process

Abstract

The invention belongs to the technical field of flame-retardant cables, and particularly relates to a flame-retardant cable and a cable flame-retardant layer forming process. The outer side of the conductive core is wrapped with an insulating layer, the outer side of the insulating layer is wrapped with a heat insulation layer, the outer side of the heat insulation layer is wrapped with a shielding layer, the outer side of the shielding layer is wrapped with a flame-retardant layer, the flame-retardant layer is filled with an air bubble film, the air bubble film is made of a low-smoke flame-retardant material, and the air bubble film is filled with inert gas. The flexibility of a flame-retardant material is lower than that of a common cable wrapping material, a larger bending radius is needed, more space is occupied, installation and use are inconvenient, the use length of the cable is increased, and the use cost is increased; according to the invention, the air bubble film is arranged, so that the flexibility of the cable is better, the bending radius during use is smaller, the occupied space is reduced, the use is convenient, and the use of cable materials is saved under the condition that the good flame retardant property of the cable is ensured.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant cables, and in particular relates to a flame-retardant cable and a forming process for a flame-retardant layer of the cable. Background technique [0002] Flame-retardant cable refers to the cable that the sample is burned under the specified test conditions. After the test fire source is removed, the spread of the flame is only within a limited range, and the residual flame or residual flame can extinguish itself within a limited time. The fundamental characteristic is: it may be burned out in case of fire and cannot operate, but it can prevent the spread of fire. In layman's terms, in the event of a wire fire, it can limit the combustion to a local area without spreading, keep other various equipment, and avoid greater losses. There is still room for improvement in the existing flame-retardant cables. [0003] For example, a Chinese patent with the application number CN201710247754.0 d...

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Problems solved by technology

[0004] In this solution, the flame-retardant effect of the flame-retardant cable is improved to a certain extent, but it does not consider that the flexibility of the flame-retardant material is lower than that of ordinary cable packaging materials, and requires a larger bending radius and takes up more space when used. , it is inconvenient to install and use, and it increases the length of the cable and increases the cost of use

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