High-grade flame-retardant fireproof optical cable

Abstract

The invention discloses a high-grade flame-retardant fireproof optical cable. The high-grade flame-retardant fireproof optical cable comprises a layer stranded type cable core, the layer stranded type cable core is wrapped by a double-face synthetic mica tape layer, the double-face synthetic mica tape layer is wrapped by a steel plastic composite band layer, the steel plastic composite band layer is externally plastically extruded by a low-smoke halogen-free inner sheath, the low-smoke halogen-free inner sheath is externally provided with at least one armored layer, the armored layer is externally provided with a fireproof layer and a low-smoke halogen oversheath, the low-smoke halogen-free inner sheath and the low-smoke halogen-free oversheath are both prepared by low-smoke halogen-free ceramic polyolefin, and the low-smoke halogen-free ceramic polyolefin comprises 60-70% of matrix polyolefin and 30-40% of an auxiliary agent, wherein the auxiliary agent comprises a plasticizer, white carbon black, 3% of micro-encapsulated red phosphorus, siloxane, 15-28% of a gas-phase fire retardant and 5-7% of a special fire retardant. The ceramic polyolefin is a halogen-free high-oxygen index sheath material and is easily ceramic during high-temperature combustion to form a compact protection layer so as to obstruct flames and heat transfer and accordingly prevent fibers from high-temperature damage.

Description

technical field [0001] The invention relates to the field of communication optical cables, in particular to a high-grade flame-retardant and fire-resistant optical cable. Background technique [0002] In recent years, with the deepening implementation of the "Broadband China" strategy and the active promotion of the information strategy, the network has become a very important information transmission channel in my country. As we all know, optical fiber is the core component in the process of informatization. In order to make optical fiber widely used in various fields, improving the protection level of optical fiber has become an important goal of optical cable research and development. Therefore, the application of flame-retardant and fire-resistant optical cables is born. Ensure that the optical cable can continue to be used in the event of a fire, reducing property and personnel losses. How to give full play to the performance of various materials of the optical cable, ...

AI Technical Summary

Problems solved by technology

The most commonly used fire-resistant optical cables generally use ordinary mica tape and refractory materials. Ordinary mica tape cannot effectively block heat transfer. The heat will gradually penetrate into the optical fiber and other materials as time goes by. The optical fiber is easily heated and the attenuation of the optical fiber changes greatly. , making it difficult for optical cables to maintain the smoothness of optical fiber communication for a long time and lose the ability to transmit information, so it is no longer possible to unilaterally rely on ordinary low-smoke and halogen-free materials and ordinary mica to maintain fire resistance

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