Flame-retardant flexible fireproof cable and preparation method thereof

Abstract

The invention discloses a flame-retardant flexible fireproof cable and a preparation method thereof. The flame-retardant flexible fireproof cable comprises a surface layer sheath, a hollow layer, a support layer, an inner layer, an insulation layer and a conductor. The work temperature of -70 DEG C to 200 DEG C can be born for a long time; the flame retardant grade is V-0; the minimum bending radius is not higher than eight times of the diameter; the thunder-and-lightning abrupt slope peak of 4000 kV / s can be at least resisted; the yield strength is not lower than 80N / mm<2>; the elongation percentage is not lower than 25 percent; the tensile strength is not lower than 100N / m<2>; graphitized carbon fiber manufactured by using a specific method is woven into a net pipe shape to be used as a support layer; the design of a hollow layer is added; high-temperature anti-aging materials are selected to be used as base materials; the excellent high-temperature-resistant insulation performance is obtained. The flame-retardant flexible fireproof cable has the advantages that the integral mechanical performance is good; the insulation performance is high; the flame-retardant performance is realized; the minimum bending radius is small; the high-temperature-resistant performance and the aging-resistant performance are good; the service life is long; the use range is wide.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a flame-retardant flexible fireproof cable and a preparation method thereof. Background technique [0002] A cable is usually a rope-like cable twisted by several or groups of conductors (at least two in each group). Each group of conductors is insulated from each other and is often twisted around a center. Highly insulating overlay. The cable has the characteristics of internal electrification and external insulation. [0003] The insulating layer is to evenly and hermetically wrap a layer of non-conductive material around the cable conductor, such as: resin, plastic, silicone rubber, PVC, etc., but these materials are limited by their essential properties, and their heat resistance and insulation properties are relatively weak . [0004] Among the relevant patents that have been applied in China, the patent "A Flame Retardant Tensile Flexible Cable" (application number: ...

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Problems solved by technology

[0003] The insulating layer is to evenly and hermetically wrap a layer of non-conductive material around the cable conductor, such as: resin, plastic, silicone rubber, PVC, etc., but these materials are limited by their essential properties, and their heat resistance and insulation properties are relatively weak

[0004] Among the relevant patents that have been applied in China, the patent "A Flame Retardant Tensile Flexible Cable" (application number: 201610040262.X, publication date: 2016-05-04) discloses a flexible cable with flame retardant capability, However, it adopts five layers of metal armor layers. Because it is a circular tubular armor layer, its bendability must be poor, the minimum bending radius is large, the comprehensive mechanical properties are poor, and the scope of use is small; due to the use of a large number of metal layers, its Although the electromagnetic shielding performance is strong, its lightning voltage breakdown capability is greatly reduced. In particular, the insulating material used is mainly conventional polyester fiber except for the material on the surface of the core material. And it is susceptible to acid and alkali corrosion, poor water resistance, and easy to burn. Therefore, the invention has weak insulation, short service life, poor flame retardancy, easy aging, and high temperature resistance

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