Anti-shrinkage multi-unit parallel beam tube optical cable and manufacturing method thereof

Abstract

The invention discloses an anti-shrinkage multi-unit parallel beam tube optical cable and a manufacturing method thereof. The optical cable comprises a cable core and a sheath layer wrapping the cablecore, the cable core comprises a center reinforcing part, at least two parallel beam tubes and an anti-shrinkage wrapping layer, and the multiple beam tubes are arranged around the center reinforcingpart and are parallel to the center reinforcing part; and each beam tube comprises an optical fiber unit and a loose tube wrapping the optical fiber unit, the outer surface of the loose tube is provided with a plurality of grooves, the plurality of grooves are arranged at intervals along the axial extension direction of the loose tube, an anti-shrinkage wrapping layer wraps each loose tube, and part of each anti-shrinkage wrapping layer is embedded into the grooves. The manufacturing method comprises a plastic coating process, a groove pressing process, an anti-shrinkage wrapping layer coating process and a sheath process. The optical cable is compact in structure, light in weight and high in optical fiber duty ratio, and the shrinkage problem of the beam tubes in the optical cable is solved; According to the manufacturing method, the optical cable can be rapidly and conveniently produced and manufactured, and the structural requirements of the optical cable are met.

Description

technical field [0001] The invention relates to the field of optical cable structure design, in particular to an anti-shrinkage multi-unit parallel bundle tube optical cable and a manufacturing method thereof. Background technique [0002] At present, the optical cable structure suitable for transmission lines in the field of optical communication generally has two types: layer-stranded type and central beam tube type. Among them, the layer-stranded type has a large number of optical fiber cores, but its structure is large, heavy, and the cost of manufacturing materials is relatively high. High; while the central beam tube type optical fiber cable has fewer fiber cores, compact structure, light weight, and relatively low manufacturing material cost, but generally the number of cores is not more than 12 cores. Major optical cable manufacturers at home and abroad are actively looking for new optical cable structures to reduce manufacturing costs while meeting technical indicat...

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Problems solved by technology

[0004] The application date is 2005.8.25, the application number is 200520106358.9, the authorized announcement number is CN2824073Y, and the name is: an anti-retraction, total water-blocking, easy-to-open and strip optical cable, which is uniformly and continuously coated on the central bundle tube with waterproof adhesive Above, stick the central bundle tube to the outer sheath to achieve anti-shrinkage; although this method achieves the purpose of anti-shrinkage, the optical cable is not easy to peel off

The application date is 2000.12.27, the application number is 00264096.1, the authorized announcement number is CN2456180Y, and the name is: a central tube type optical cable to prevent the retraction of the bundle tube, and the plastic steel sheath and the center tube are arranged at a longitudinal interval between the two Closely connected hot-melt adhesive rings are used to prevent shrinkage, which has the same disadvantages as the above-mentioned patents; the application date is 2006.1.13, the application number is 200680005231.15, the publication number is CN 101120277A, and the name is: low-shrinkage telecommunication optical cable and its manufacturing method , the shrinkage reduction piece made of liquid crystal polymer is placed between the jacket and the buffer layer to achieve anti-shrinkage; although the anti-shrinkage function is achieved, the liquid crystal polymer itself is expensive and difficult to place during processing, so it is practical Poor, high cost, low yield

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