The armoured structure of GYTS fiber optical cable is to sleeve single mode or multi mode fiber (OM1 50/125 um or OM2 62.5/125 um) into PBT loose tube. The center of the cable is a metal strength member. The loose tube (and filling rope) is twisted around the central strength member to form a compact and circular cable, and the gaps in the cable core are filled with water blocking compounds. The steel-plastic composite tape is longitudinally wrapped and then extruded with a polyethylene sheath. The 72/96/144/288 cores fiber optical cable are most widely used.
The material of PBT loose tube has good hydrolysis resistance, the tube is filled with special ointment to protect the fiber.
Steel-polyethylene sheath has excellent compressive properties
PE sheath has good resistance to solar radiation