NOVEL HIGH-FLAME-RETARDANT FIRE-RESISTANT BUNDLE TUBE TYPE OPTICAL CABLE USING FULLY-DRY OPTICAL FIBER RIBBONS

A novel high-flame-retardant fire-resistant bundle tube type optical cable using fully-dry optical fiber ribbons. The optical cable improves the flame-retardant and fire-resistant performances of the optical cable and reduces the smoke density of the optical cable when the optical cable is on fire, is a high-flame-retardant, small-cable-diameter and high-density optical fiber and cable, and can be applied to places having dense population and high requirements for safety level. The optical cable comprises a dry-type optical fiber structure (1) located in the center. The dry-type optical fiber structure (1) specifically comprises a wrapping tube (2) and a plurality of water-blocking optical fiber ribbons (3). A composite tape layer (4) is annularly distributed on an outer circumferential surface of the wrapping tube (2), the plurality of water-blocking optical fiber ribbons (3) which form a whole are distributed in an inner cavity of the wrapping tube (2), the number of cores of each water-blocking optical fib