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 accordace with JIS K 2220-1980, 5,15 at 40.degree.C, and a shear rate of 10 sec.-1) of lower than 3 x 104 poise and also having a worked penetration (as measured in accordace with JIS K 2220-1980, 5.3 at 25.degree.C) of 85 to 475.