Stronger Fiber Optics with DuPont Kevlar®
DuPont™ Kevlar® helps provide improved flexibility in the design and manufacturing of fiber optic cable.
DuPont™ Kevlar® is used as a strength member in fiber optics. The optical fibers in the cable have to be safeguarded against mechanical stresses to ensure their optimal performance. Kevlar®, normally applied in the periphery of the cable, helps provide the necessary protection. Kevlar® also brings additional functionalities that address the dielectric, weight, diameter, flexibility, and handling requirements in a fiber optic cable. When used as a central strength member for fiber optics, where properties such as compression, flexibility, and low diameter are required, it is commonly combined with resins to form a Kevlar® Reinforced Plastic (KRP).
Aerial dielectric self-supporting cables
Higher tensile modulus to weight and smaller cable size in an aerial cable made with Kevlar® help result in stronger cables that use less material. Immune to electromagnetic disturbances, environmental moisture, and temperature fluctuations, aerial cables of Kevlar® help provide error-free data transmission in all weather.
The functionality of Kevlar® can also be enhanced by treating its surface with super-absorbing water polymers. The resulting yarn can, in turn, be used as a strength member. The purpose of a water-blocking yarn is to help prevent the ingression of water into the cable, which can lead to signal attenuation and a shorter service life.
Increased strength is just one of many ways Kevlar® helps producers of premise cables make better products. Uniform coverage around the fiber makes cable production more efficient and results in a more consistent outside diameter (O.D.). Easy connectorization also distinguishes premise cables made of Kevlar®.
Fiber to the home (FTTH)
Kevlar® has been instrumental as a component fiber-to-the-home (FTTH) technology accessible to customers looking for high-bandwidth connectivity in homes, offices, and apartments. Protecting cables between the central office and the home, Kevlar® is helping to play an essential role in an increasingly connected world.
Many cable manufacturers have used ballistic tape made of Kevlar® to help protect aerial cables that risk failure from gunshot. Wrapped longitudinally or in spirals, ballistic tape of Kevlar® will stop most bullet fragments and pellets from entering the cable, preserving the integrity of the cable.
Building a ripcord made of Kevlar® into the outer layer of cable jackets helps give technicians easy access to the fiber optic lines inside and eliminates the need to use a cutting tool, which can damage the glass wave guides. With high tensile strength and a small diameter, ripcords of Kevlar® help provide the sharpest, cleanest and fastest cut through jackets made of polyethylene, PVC, or steel armor. For reliability and performance, no other cable ripcord material can match Kevlar®.
DUPONT PRODUCTS & SERVICES
DuPont™ Kevlar® fibers are used to help provide strength, flexibility, and lightweight protection in everything from yarns and woven ballistic fabrics to ropes and apparel.
Best known for its use in ballistic and stab-resistant body armor, Kevlar® brand aramid fiber is credited with helping to save thousands of lives. Lightweight and extraordinarily strong, it’s used to make a variety of clothing, accessories, and equipment safer, more cut resistant and durable.