Cable obstruct water belt

　　Obstruct water belt is a complex of polyester fiber bonded cloth and high bibulous materical, which has the function of expanding after sopping. Used in electrical cable and communication optical fiber cable, it can reduce the infitration of the water and humidity in the cable, and so increase the work life of the cable. The working mechanism if as follow:

　　The common electrical cables are usually laid in the waery and underground channel. During the running of burying cross-linked polyethylene insulating eledtrical cable, if meeting with the contingency and appear electric breakdown, ground water will enter the electric core across the breakdown hole and seep into both ends of the cable allong the core. The seeping water enter the insulated layer,under the long effect of electric field, it can expedite the aging of the aging of the insulated layer,even discard the whole cable as useless.

　　As using the obstruct water belt, when water entering the cut, the high bibulous farina contained in the belt can take advantage of its huge seeping ability to absorb water, the farina rapidly expands to the size of several hundred times of its volume.just as a water calm, which resist the water flow and protect the cable.

　　By using the communication cable of obstruct water belt, we can prenent water from flowing into the core. When water longitudinally flows to the couple end or the connective equipment in the close circuit, it will cause serious problems. Therefore, the use of obstruct water belt will ensure the unblocked spreading of the communication information.