Layered optical cable

Layered optical cables adopt the "SZ" two-way lay technology. Layered optical fiber cable is a round cable core formed by a number of sleeves containing optical fiber winding around the central reinforcing member. The metal or non-metal reinforcement is located in the center of the optical cable, and the loose sleeve containing the optical fiber is arranged around the reinforcement.

Applicable scope of layer-twisted optical cable

1. Long-distance communication and inter-office communication. 2. Especially suitable for occasions with high requirements for moisture-proof and rat-proof

Advantages and disadvantages of layered optical cable

① Advantages: it can accommodate a large number of optical fibers, the optical fiber length is easy to control, the mechanical and environmental performance of the optical cable is good, and it is suitable for direct burial, pipeline and overhead laying. ② Disadvantages: the structure and process equipment of optical cable are complex, the production process is complicated, and the material consumption is high.

Structural characteristics of layered optical cable

1. Metal center reinforcement (phosphating steel wire). 2. Double-sided plastic coated aluminum tape - polyethylene bonded inner sheath. 3. Double-sided plastic coated corrugated steel strip - polyethylene bonded inner sheath

Features of Layered Optical Cable

1. Adopt "SZ" two-way lay technology; 2. Fill with water-blocking ointment step by step, and block water in the whole section; 3. The steel (aluminum) strip lap has reliable bonding, high strength and no cracking in torsion; 4. The control of fiber excess length is stable; 5. After cabling, the additional attenuation of the fiber is close to zero, and the dispersion value does not change; 6. Excellent environmental performance, applicable temperature range is - 10 ℃~+70 ℃; 7. Suitable for overhead, pipeline, direct burial and other laying methods. 8. A special device is used to adjust the tightness of the tight sleeve to obtain the best fiber stripping and optical performance; 9. High modulus aramid fiber is used as the tension resistant material, and the paying-off tension of aramid fiber is accurately controlled, so that the optical cable has excellent tensile mechanical properties; 10. The outer sheath is made of flame retardant materials, which can meet the fire protection requirements of different grades; 11. The disadvantages of layer-twisted optical cable are that the structure and process equipment of optical cable are complex, the production process is cumbersome, and the material consumption is high.