Loose tube (filling rope) is twisted around the central nonmetallic reinforcement (FRP) to form a compact circular cable core, the gap in the cable core is filled with water-blocking filler, and the cable core is twisted with a layer of aramid fiber for reinforcement, and. Loose tube (filling rope) is twisted around the central nonmetallic reinforcement (FRP) to form a compact circular cable core, the gap in the cable core is filled with water-blocking filler, and the cable core is twisted with a layer of aramid fiber for reinforcement, and. Search by Cooperative Patent Classifications (CPCs): These are commonly used to represent ideas in place of keywords, and can also be entered in a search term box. If you're searching for seat belts, you could also search for B60R22/00 to retrieve documents that mention safety belts or body. an easy and cost-effective one-step installation using standard hardware and installation methods. Reduc oviding superior protection against UV radiation, fungus, abrasion and other environmental factors. Available for high voltage transmission lines f r the following electric field potential. Adopted for high voltage, middle, small span conditions in Power Transmission Systerm or mazy terrain such as river spanning, mountains. The cable jacket incorporates an inner polyethylene jacket (optional), aramid yarns and an outer polyethylene or AT (anti-tracking). Special sheath material designed for ADSS optical cables laid synchronously with high-voltage power transmission lines. It can be directly suspended on power poles and towers.