The structure of the standard figure-8 self-supporting layer-stranded optical cable is to insert single-mode or multi-mode optical fibers into a loose tube made of high-modulus plastic, and the tube is filled with a water-blocking compound. The center of the cable core is a metal reinforcing core. For some optical cables with a certain number of cores, a layer of polyethylene needs to be squeezed outside the metal reinforcing core. The loose tube (and filling rope) is twisted around the central reinforcing core to form a compact and Round cable core, the gap in the cable core is filled with water-blocking filler. The cable core is wrapped longitudinally with a steel-plastic composite tape and placed parallel to the steel strand while extruding an 8-shaped sheath to form a cable.
l Precise control of the excess length of the optical fiber ensures that the optical cable has good tensile properties and temperature characteristics;
l The loose tube material itself has good hydrolysis resistance and high strength. The tube is filled with special grease to provide critical protection for the optical fiber;
l There is no need to place additional steel strands during erection, which increases the construction speed by 3-4 times;
l Take the following measures to ensure the waterproof performance of optical cables:
A single steel wire center reinforcement, special fiber paste filled in the loose tube, 100% cable core filling, double-sided plastic-coated steel strip (PSP) improve the moisture-proof ability of the optical cable, and good water-blocking materials prevent longitudinal water seepage of the optical cable.
l Operating temperature: -40℃ to +60℃;
l Bending radius: static 10D, dynamic 20D;
l Applicable: self-supporting overhead, span less than 200m.