| 摘要 |
A fiber optic cable having both water blocking and flame retardant properties that is particularly useful for indoor or indoor/outdoor applications. In one embodiment, the fiber optic cable includes at least one buffer tube, at least one optical fiber disposed within the buffer tube, a composite tape surrounding the buffer tube that comprises a layer formed of an inherently flame retardant material and at least one coating a water swellable material, and a jacket surrounding the composite tape. The fiber optic cable can also include a water blocking element disposed within the buffer tube. The water swellable coatings of the composite tape and the water blocking element within the buffer tube therefore inhibit water migration along the length of the cable, while the flame retardant layer of the composite tape provides fire resistance. In another aspect, a dry fiber optic cable that includes a buffer tube comprised of an inherently flame retardant material, at least one optical fiber disposed within the buffer tube, a first tape comprised of a water swellable material that at least partially surrounds the at least one optical fiber, at least one roving extending lengthwise along the buffer tube and having a coating comprised of a water swellable material, and a jacket surrounding the buffer tube and the at least one roving. As such, the buffer tube provides flame retardant properties, while the first tape and the water swellable coating of the at least one roving inhibit water migration along the length of the cable.
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