Νέα

FRP Strength Member for Optical Cable
Fiber Reinforced Polymer (FRP) strength member has become an indispensable core component in modern optical cables, especially with the rapid development of FTTH and aerial optical communication networks. As a non-metallic reinforcing material, it integrates high strength, light weight, corrosion resistance and electrical insulation, effectively addressing the limitations of traditional metallic strength members and ensuring the long-term stability and reliability of optical cables in various harsh application environments.
The FRP strength member for optical cable is mainly composed of high-performance reinforcing fibers and thermosetting resin matrix, manufactured through the pultrusion process which ensures continuous and uniform structure. The reinforcing fibers, typically E-glass, S-glass or PBO fibers, provide excellent tensile strength and modulus—PBO-FRP even has a tensile strength more than twice that of aramid fiber. The resin matrix, such as epoxy or vinyl ester, binds the fibers tightly, transferring loads evenly and protecting fibers from external damage, while additives like UV stabilizers and flame retardants further enhance its environmental adaptability.

Compared with traditional steel wire or aramid strength members, FRP strength members have distinctive advantages. Firstly, it has an excellent strength-to-weight ratio: weighing 70% less than galvanized steel but with comparable or even higher tensile strength (up to 1500 MPa), which reduces the overall weight of optical cables and simplifies installation.

In terms of specifications, FRP strength members for optical cables are available in round or flat shapes, with diameters ranging from 0.4mm to 5.0mm and lengths up to 25km for small-diameter types, meeting the requirements of different cable structures such as ADSS, drop cables and indoor cables .

In practical applications, FRP strength members play a crucial role in protecting optical fibers from tensile stress, bending damage and environmental erosion during installation and long-term operation.