The fibers, 250um, are positioned in a loose tube made of a high modulus plastic.

the tubes are filled with a water-resistant filling compound.

a steel wire, sometimes sheathed with polyethylene (PE)for cable with high fiber count, located in the center of core as a metallic strength member.

tubes (and fillers) are stranded around the strength member into a compact and circular cable core.

an aluminum polyethylene laminate (APL) is applied around the core of cable.

which is filled with the filling compound to protect it from water ingress.

then the core of cable is covered with a thin PE inner sheath.

after the PSP is longitudinally applied over the inner sheath, the cable is completed with a PE outer sheath.

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Good mechanical and temperature characteristics

Loose tube material itself has good water resistance and high strength.

The tube is filled with special ointment to protect the optical fiber.

Specially designed compact optical cable structure to effectively prevent casing retraction.

PE sheath has good UV radiation resistance

The following measures are taken to ensure the waterproofing performance of the cable:

Core reinforcing core of single steel wire

Special waterproof compound filled in loose casing

Full core filling

– coated aluminum strip (APL) moistureproof layer