초록 ▼

A communications cable comprising a core of at least one transmission medium and a plastic jacket includes provisions for preventing the movement of water within the cable. An impregnated tape (35) is interposed between the core and the jacket and is wrapped about the core to form a longitudinal ove

A communications cable comprising a core of at least one transmission medium and a plastic jacket includes provisions for preventing the movement of water within the cable. An impregnated tape (35) is interposed between the core and the jacket and is wrapped about the core to form a longitudinal overlapped seam. The tape comprises a substrate tape (37) which is impregnated with a superabsorbent material which upon contact with water swells and inhibits the further movement of the water. The tape and its thickness are controlled so that the thickness is minimal while the tensile strength of the tape and its porosity prior to impregnation are optimized.

대표청구항 ▼

A communications cable, which comprises: a core comprising at least one transmission medium; a jacket which comprises a plastic material and which encloses said core; and a longitudinally extending water blocking tape comprising a substrate tape which is wrapped about said core between said core and

A communications cable, which comprises: a core comprising at least one transmission medium; a jacket which comprises a plastic material and which encloses said core; and a longitudinally extending water blocking tape comprising a substrate tape which is wrapped about said core between said core and said jacket, said tape being impregnated with a water blocking material which is swellable upon contact with moisture to block entry of moisture into said core and movement longitudinally along the cable, and having a thickness that is controlled to optimize the tensile strength of the tape and its porosity which prior to its being impregnated is relatively high.