Small-cable-diameter ultra-thin air-blown miniature optical fiber cable and manufacturing technology thereof

Abstract

The invention discloses a small-cable-diameter ultra-thin air-blown miniature optical fiber cable and a manufacturing technology thereof and relates to the technical field of communication cables. The small-cable-diameter ultra-thin air-blown miniature optical fiber cable comprises loose tubes, fiber paste, cable paste, optical fibers and an outer sheath. The three loose tubes are arranged inside the outer sheath, the optical fibers are arranged in the loose tubes, the parts between the loose tubes and the optical fibers are filled with the fiber paste, the part between the loose tubes and the outer sheath is filled with the cable paste, stranded units composed of the loose tubes and the optical fibers are hinged mutually to form cable cores, strengthened high-hardness PBT plastic loose tubes are adopted as the loose tubes, and a corrugated or sawtooth-shaped polyethylene outer sheath is adopted as the outer sheath. The outer diameter and the self-weight of the miniature cable are greatly reduced, the mechanical performance is improved, cost is lowered, the air blowing laying distance is fully enlarged, the service life of the optical cable is fully prolonged, construction laying is facilitated, and the obvious market competitiveness is achieved.

Description

technical field [0001] The invention relates to the technical field of communication optical cables, in particular to an ultra-fine air-blown miniature optical fiber cable with a small cable diameter and a manufacturing process thereof. Background technique [0002] While the telecommunication network continues to develop, it also puts forward new requirements for optical cable products. The structure of the optical cable is increasingly dependent on the environment in which it is used and the specific requirements of the construction. The construction of the network continues to expand, and the new generation of optical cable structure and construction technology will also undergo a series of new changes. The micro-pipe and micro-cable technology completely eliminates the "last mile" connection between the optical fiber in the construction of the optical transmission network to the interior of the community and to each floor of the building. Without entering the "cost bottl...

AI Technical Summary

Problems solved by technology

[0003] Due to technical limitations, the traditional layer-stranded air-blown microcable usually adopts the ordinary GYTY or GYFTY structure, and achieves the purpose of reducing the outer diameter of the optical cable, compacting the structure and manufacturing cost through appropriate adjustment and control of process parameters; figure 1 It is an ordinary layer-stranded air-blown micro-cable structure. The structure of this product is mainly that several loose tubes 1 (usually more than 4) are twisted around the central reinforcement 7 to form a cable core, which can be wrapped if necessary. Non-metallic reinforcing material 6, the outer sheath 5 of the outermost layer of extruded polyethylene, however, for the air-blown micro-cable with 72 cores or less, the outer diameter of the product is larger and the cable weight is larger, which increases the manufacturing cost. Cost and construction and laying costs have affected the overall competitiveness of the product. Under the current technological conditions, it is impossible to achieve further breakthroughs in reducing the outer diameter of the product by reducing the diameter of the casing and the wall thickness of the outer sheath. Therefore, the existing R & D technicians put the innovation of air-blown microcable products on the innovation of product structure and raw materials

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