The fibres are positioned in a spiral space loose tube made of a high modulus plastic. The tube is filled with a water-resistant filling compound. The tube is wrapped with a layer of water-blocking material and armoring material. Two parallel steel wires are placed at the two sides. The cable is completed with a polyethylene sheath.
Main characters of YOFC spiral space unitube cable:
－Specially designed spiral space loose tube is helpful to accurately control the fibre excess length thus to ensure good mechanical and temperature performance.
－High strength loose tube that is hydrolysis resistant and special tube filling compound ensure a critical protection of fibres.
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