The structure of the GYDTA optical cable is to insert 4, 6, 8, and 12-core optical fibers into a loose tube made of high modulus material, and fill the loose tube with waterproof compounds. The center of the cable core is a metal reinforcing core. For some cable cores with certain numbers of cores, an additional layer of polyethylene (PE) needs to be extruded outside the metal reinforcing core. The loose tube and the filling rope are twisted around the central reinforcing core to form a compact and circular cable core. The gaps within the cable core are filled with water-resistant fillers. The coated aluminum tape (APL) is longitudinally wrapped, and then a polyethylene sheath is extruded to form the cable.
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