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Flame-retardant and fire-resistant optical cable

A flame-retardant and fire-resistant fiber optic cable technology, which is applied in the field of optical communication transmission, can solve problems such as unreasonable structural settings, difficulty in meeting low-smoke performance, unsatisfactory flame-retardant and fire-resistant performance, etc., to ensure light flux, high strength and rigidity , Improve the effect of light transmittance

Active Publication Date: 2013-04-24
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to meet the standard requirement of low smoke, that is, the light transmittance shall not be lower than 60%
[0003] Existing fire-resistant and flame-retardant optical cables are mainly composed of cable cores, strengthening members, fire-resistant tapes and flame-retardant sheaths. not yet ideal
It is difficult to meet the standard requirement of low smoke, that is, the light transmittance shall not be lower than 60%

Method used

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  • Flame-retardant and fire-resistant optical cable
  • Flame-retardant and fire-resistant optical cable
  • Flame-retardant and fire-resistant optical cable

Examples

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Embodiment Construction

[0024] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The first example is figure 1 As shown, it is a layer-stranded single-sheath single-armored flame-retardant and fire-resistant optical cable, which includes a layer-stranded cable core located in the center of the cable. The layer-stranded cable core includes a glass fiber central reinforcement 11, a glass fiber A loose tube 15 is stranded on the outer periphery of the fiber central reinforcement, and a filling rope 16 and a water blocking member 12 can also be twisted. An optical fiber unit 13 is laid inside the loose tube, and the optical fiber unit is an optical fiber, an optical fiber bundle or an optical fiber ribbon. The loose tube contains a water-blocking element 14, which is water-blocking yarn or water-blocking powder, forming a fully dry layer twisted cable core. The cable core is covered with an inner water-blocking layer 21...

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Abstract

The invention relates to a frame-retardant and fire-resistant optical cable which comprises a cable core and is characterized in that an inner water-resistant layer and an inner fire-resistant layer are coated on the cable core, and an outer fire-resistant layer is arranged outside the inner fire-resistant layer. A steel-plastic composite belt armor layer and a low-smoke zero-halogen outer protection sleeve are respectively coated the outermost layer of a cable. The frame-retardant and fire-resistant optical cable has high frame-retardant and fire-resistant performance, maintenance of good light transmission performance of the optical cable in high-temperature burning and cooling periods is ensured, and the high-grade frame-retardant, fire-resistant and low-smoke zero-halogen protection sleeve enables the optical cable to be high in oxygen index, good in flame retardant efficiency, low in fuming, high in light transmittance, and strong in nucleating after being burnt. Combustion residues are a hard outline layer, a ceramic vulcanization silicon rubber fire-resistant layer is capable of resisting fire within the temperature of 1200 DEG C and 1500 DEG C. A steel belt enables the optical cable to maintain quite high intensity and rigidity. The two points effectively reduce affection of internal stress of different components after the optical cable is burnt, light transmittance of the optical cable is further ensured, the burning from outside to inside of the optical cable is blocked and retarded, and frame-retardant and fire-resistant performance of the optical cable is further enhanced.

Description

technical field [0001] The invention relates to a flame-retardant and fire-resistant optical cable, which belongs to the technical field of optical communication transmission. Background technique [0002] The existing flame-retardant optical cable is mainly composed of a cable core, a strengthening member and a flame-retardant sheath, and its flame-retardant performance is mainly realized by the flame-retardant sheath. Most flame-retardant optical cables only meet the requirements of single vertical combustion and bundled vertical Class C combustion. It is difficult to meet the standard requirements of low smoke, that is, the light transmittance shall not be lower than 60%. [0003] Existing fire-resistant and flame-retardant optical cables are mainly composed of cable cores, strengthening members, fire-resistant belts and flame-retardant sheaths. Not ideal yet. It is difficult to meet the standard requirements of low smoke, that is, the light transmittance shall not be ...

Claims

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Application Information

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IPC IPC(8): G02B6/44
Inventor 刘沛东陈锋杨巧苏晓帆何军李闽刚刘宏超熊壮
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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