The basic structure of an optical cable is generally composed of cable core, reinforcing steel wire, filler and sheath. In addition, there are waterproof layers, buffer layers, insulated metal wires and other components as needed.
So, the manufacturing process of optical cables is generally divided into the following processes: 1. Screening of optical fibers: Select optical fibers with excellent transmission characteristics and qualified tension.
2. Dyeing of optical fibers: Standard full chromatography should be used for identification, and high temperature is required to prevent fading and migration.
3. Secondary extrusion: Use plastic with high elastic modulus and low linear expansion coefficient to extrude it into a tube of a certain size, put the optical fiber into it and fill it with moisture-proof and waterproof gel, and finally store it for a few days (no less than two days).
4. Optical cable stranding: strand several extruded optical fibers and strengthening units together.
5. Extruded optical cable outer sheath: Add a layer of sheath to the twisted optical cable.
