A water-blocking flexible optical fiber ribbon and a fully dry high-density optical fiber cable

Abstract

The invention discloses a water-blocking flexible optical fiber ribbon and a fully dry type high-density optical fiber cable. The water-blocking flexible optical fiber ribbon includes three or more single-core optical fibers arranged side by side, and there are axially discontinuous resin connection parts between the single-core optical fibers; the resin connection parts are made of water-absorbing and swellable water-blocking adhesive Resin; the water-swelling water-blocking adhesive resin, the water-swelling rate is ≥30ml / g (21℃, 65%RH). The all-dry high-density optical cable includes the water-blocking flexible optical fiber ribbon and an outer sheath; the water-blocking flexible optical fiber ribbon is accommodated in the outer sheath. The water-blocking flexible optical fiber ribbon and the fully dry air-blown optical fiber cable using the water-blocking flexible optical fiber ribbon provided by the present invention, the connecting part of the flexible optical fiber ribbon has a water blocking function, is a fully dry structure, and the surface of the optical fiber is free of grease, especially Because there is no need to add water-blocking yarn, water-blocking powder or ointment in the loose tube, the fiber density is greatly improved, and the air blowing efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the field of optical communication, and more particularly, relates to a water-blocking flexible optical fiber ribbon and a fully dry high-density optical fiber cable. Background technique [0002] With the continuous deployment of 4G network and the development of 5G network, the resources of underground pipeline network are becoming increasingly tight, and the cost of leasing the pipeline is much higher than the value of the optical cable itself. How to quickly and low-cost construction has become a difficult problem that operators need to overcome. Air-blown micro-cable is an optical cable laid by air-blown construction. During construction, compressed air is generated by air-blowing equipment to blow the optical cable into the pre-buried silicon core tube. The air-blowing speed can reach 50m / min, and the one-time air-blowing distance can be Reach 1km and above, save labor, and the construction efficiency is significantly hig...

AI Technical Summary

Problems solved by technology

This kind of water-blocking optical fiber is coated with a water-blocking layer after the colored optical fiber is completed, which requires one more coating process, and is not conducive to the miniaturization of optical cables.

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