Fire-resistant heat-insulating belt for optical fiber cable

Abstract

The invention provides a fire-resistant heat-insulating belt for an optical fiber cable. The invention aims to solve the problems that the present jacket of the optical fiber cable and the wrapped outer protecting layer are poor in fire resistance of the material, cannot resist fire for a long time, are inferior in heat-insulating property and cannot realize a high-temperature protection function. The fire-resistant heat-insulating belt for the optical fiber cable comprises a first glass fiber layer, a mica layer, a second glass fiber layer, a ceramic fiber layer and a third glass fiber layer, wherein the mica layer is fixed between the first glass fiber layer and the second glass fiber layer and the ceramic fiber layer is fixed between the second glass fiber layer and the third glass fiber layer. The fire-resistant heat-insulating belt for the optical fiber cable has a fire-resistant temperature at 850-1000 DEG C, a tensile strength of N / 10mm more than or equal to 300 and a voltage-resisting power frequency puncture strength more than 10 kilovolt / mm<2>; the fire-resistant heat-insulating belt for the optical fiber cable has the advantages of fire-resistant high temperature resistance, heat-insulating anti-flaming property, impact resistance, rain resistance, and the like; the performance is stable; the service life is longer than 30 years; the fire-resisting property and safety of the optical fiber cable are greatly increased; and the manufacturing cost of the optical fiber cable is lowered.

Description

technical field [0001] The invention relates to a fire-resistant heat-insulating belt for an optical cable, which belongs to the technical field of optical cable materials. Background technique [0002] Optical fiber cable is mainly composed of optical fiber (glass filament as thin as hair), plastic protective sleeve and plastic sheath. An optical cable is a communication line in which a certain number of optical fibers form a cable core in a certain way, and is covered with a sheath, and some are also covered with an outer sheath to realize optical signal transmission. That is: a cable formed by an optical fiber (optical transmission carrier) through a certain process. The existing sheath and sheath of the optical cable have the following disadvantages: 1. The fire resistance of the material is poor, and the fire resistance cannot last for a long time. 2. The heat insulation performance is poor, and it cannot play the role of high temperature protection. Contents of the...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing optical cable sheaths and coated outer sheaths have poor fire resistance and cannot withstand fire for a long time.

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