WATERPROOF OPTICAL FIBER CABLE

摘要

An optical fiber cable comprising a water blocking layer, an optical fiber disposed inside the water blocking layer and a water blocking material filling the space between the water blocking layer and the optical fiber, the water blocking material having an apparent viscosity (as measured in accordance with JIS K 2220-1980, 5.15 at 40 DEG C., and a shear rate of 10 sec.-1) of lower than 25,000 poise and also having a worked penetration (as measured in accordance with JIS K 2220-1980, 5.3 at 25 DEG C.) of 150 to 450.