The fibers, 250µm, are positioned in a loose tube made of a high modulus plastic.
The tubes are filled with a water-resistant filling compound. The tube is wrapped with a layer of PSP longitudinally. Between the PSP and the loose tube water-blocking material is applied to keep the cable compact and watertight. Two parallel steel wires are placed at the two sides of the steel tape. The cable is completed with a polyethylene (PE) sheath.
---To fill the multi-mode fibers into the PBT loose tube made of high modulus polyester.
---The inside of the tube is filled with water-proof compounds.
---The outside of loose tube is longitudinally wrapped with plastic coated steel tapes.
---Between the steel tape and the loose tube, water-proof material is filled to ensure the compactness and the water resistence of the cable.
---Two parallel steel wires are placed at the two sides of the steel tape. The steel wires are all inside the (PE) outer jacket.
