Blocking fiber optic cables
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Water blocking yarn is a swellable protective material used inside fiber optic cables to prevent water penetration along the cable length. It is commonly placed between buffer tubes, strength members, and outer jackets in outdoor, duct, and direct-buried cable designs. Swellcoat™ impregnated fibers are an efficient means of introducing SAP (Super Absorbent Polymer) into the fiber optic cable. As one of the main pillars of modern communication networks, fiber optic cable communication has a series of advantages such as large communication capacity, high transmission quality, good confidentiality and anti-electromagnetic interference.