Layer-stranded optical fiber ribbon cable and production process thereof

Abstract

The invention discloses a layer-stranded optical fiber ribbon optical cable and a production process thereof, wherein the layer-stranded optical fiber ribbon optical cable comprises loose tubes and optical fiber units arranged in the loose tubes, and a central reinforcing member is arranged in the plurality of stranded loose tubes; a water-blocking tape, a metal tape and a sheath layer are arranged outside the loose tubes; the optical fiber units comprise a plurality of layers of bendable optical fiber ribbons; and the bendable optical fiber ribbons are formed by continuously and alternately arranging optical fiber bundles and bonding layers, each optical fiber bundle is formed by combining at least two optical fibers after UV curing of light-cured resin, and the bonding layers are hot melt adhesive resin layers continuously coated between the optical fiber bundles, so that the optical fiber bundles can be axially bent along the bonding layers. According to the prepared layer-stranded optical fiber ribbon cable, the optical fiber bundles have bending performance and mobility in the optical fiber ribbons, so that the duty ratio of the optical fibers in the loose tubes and the fiber loading density of the optical fibers in the optical cable are improved, meanwhile, the outer diameter size of the optical cable can be reduced, the self weight of the optical cable is reduced, the installation and welding time of the optical fiber ribbon cable is saved favourably, and the installation and laying efficiency of the optical cable is improved.

Description

technical field [0001] The invention relates to the technical field of communication optical fiber cables, in particular to a layer-stranded optical fiber ribbon cable and a production process. Background technique [0002] Due to the high integration of optical fibers, the compact structure of the optical fiber cable, and less routing resources, it can effectively reduce the cost of optical cable fusion and improve the efficiency of installation and laying. Thanks to these advantages, the optical fiber ribbon cable is used in the metropolitan area network and access network. has been widely used. Stranded optical fiber ribbon cables are generally formed by twisting loose tubes on tensile elements. Each loose tube uses 6-core or 12-core optical fiber ribbons, which are stacked with different numbers of optical fiber ribbons. Due to the layer-stranded The structure is multi-tube twisted, and the number of fiber cores of the optical fiber ribbon cable is large, which can meet...

AI Technical Summary

Problems solved by technology

[0003] At present, the optical fiber ribbon in the optical fiber ribbon cable is prepared by coating the ribbon resin in a mold and cured by UV grooves. After the photocuring, the molecular chains in the ribbon resin are in a "cross-linked and cured" state, and the resin's The UV curing degree is high, which limits the mobility of the fiber bundle in the fiber ribbon; at the same time, the cured resin coating has a high modulus and poor flexibility, and the fiber bundle cannot be effectively bent and crimped in the fiber ribbon; Moreover, the optical fiber ribbons in the loose tube are placed in a "flat-stacked" manner, that is, another layer of optical fiber ribbons is stacked on top of one layer of optical fiber ribbons, which leads to a small duty ratio of the optical fiber in the loose tube, which cannot Effectively reduce the outer diameter of the loose tube and the weight of the cable itself, causing problems such as higher cost of optical fiber ribbon cable, lower installation efficiency, and higher laying costs

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