| 摘要 |
OPTICAL FIBER CABLE WHICH INCLUDES WATERBLOCKING AND FREEZE PREVENTING PROVISIONS Summary of the Invention The foregoing problems of the prior art have been overcome by cables of this invention. An optical fiber cable (20) includes a core (22) comprising at least one optical fiber transmission medium (25), a tubular member (28) in which is disposed the core (22) and which is made of a plastic material and a sheath (32) system which is disposed about the tubular member (28). Additionally, a compositional blend is disposed in the tubular member (28) and capable of performing dual functions by blocking the longitudinal flow of water as well as preventing freezing of water or moisture within the cable. Preferably, the composition includes a superabsorbent constituent blended with an antifreeze constituent, which is then disposed along one longitudinally extending member. In addition to being sprayed onto a tape or other longitudinal member, the compositional blend may also be electronically deposited directly onto the transmission matter, sheath system or core tube.
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