Phosphating steel wire for mining optical cable not only inherits all the properties of optical fiber cable, but also adds many special properties due to the special requirements of coal mine industry. The main added properties are flame retardant and rat proof (special environment of coal mine). Because coal mine, gold mine, iron mine and other mines, especially coal mine are accident prone places, in order to ensure smooth communication in case of accident, To reduce losses, the State Administration of work safety (the State Administration of coal mine safety) has mandated all products used in coal mines.

The structure of GYTA53 optical fiber cable is to sleeve 250 μ M optical fiber into a loose tube made of high modulus material, which is filled with waterproof compound. The center of the cable core is a metal reinforced core. For some cable cores, a layer of polyethylene (PE) needs to be extruded outside the metal reinforced core. The loose tube (and the filling rope) is twisted around the central reinforced core to form a compact and round cable core, and the gap in the cable core is filled with water blocking filler. A layer of polyethylene inner sheath is extruded after the longitudinal wrapping of plastic coated aluminum strip (APL), and a cable is extruded after the longitudinal wrapping of double-sided plastic steel strip (PSP).

The reasonable design and precise control of the excess length of the fiber in the loose tube make the cable have excellent tensile and temperature properties. The cable core is filled with oil paste to ensure the longitudinal water blocking effect of the cable. 12 stranded wires ensure that the optical cable has good compressive and tensile strength.