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Optical fibre cables are made of a glass (or plastic) threads (fibers) to transmit data. An optic fiber cable is a collection of such threads, each of which is used to transmit messages modulated onto light waves. Optic fiber cables have several advantages: fiber optic cables have a much greater bandwidth than metal cables, allowing them to carry more data. This data can be transmitted digitally. Optic fiber cables are also less sensitive than metal cables to interference. Further, they are thinner and lighter than metal wires. The structure of the cable is made up of two separate parts. The first part in the middle of the cable is called the core and that's the portion that the light travels through. The other part is wrapped around the outside of the core which is a layer of glass called the cladding. Basically, cladding works to keep the light signals inside the core. It can do this because it is made of a different type of glass/plastic to the core. Two types of optic fibre cables are as follows: 1. Single-mode: This cable has a very thin core about 5-10 microns (millionths of a meter) in diameter. In a single-mode fiber, all signals travel straight down the middle without bouncing off the edges. Used in Cable TV, Internet, and telephones, Cables like these can send information over 100 km (60 miles). 2. Multi-mode: Multi-mode fibre cable is about 10 times bigger than the one in a single-mode cable. It can send information only for short distances and is used to link computer networks together. a. HDPE BLACK COMPOUND BLS-8888 b. BLS 6666 BLS Polymers introduces another sophisticated compound for sheathing & jacketing of Power Cables Grade BLS 6666. This compound is made from specially selected LLDPE resin and carbon black that provides a balance of toughness, low shrinkage, high moisture barrier, high abrasion resistance, excellent weathering resistance, excellent chemical resistance, high ESCR, heat deformation resistance, termite resistance, low friction for easy pulling during installation, easy processibility than conventional compounds. This compound meets the stringent quality requirements for Power and Communication Cables. BLS 6666 meets the specification requirements of ASTM D 1248 Type 1 Class C Category 4 Grade E 4, E 5, J 3, BS 6234 Type 03C, IEC 60502 Type ST 3, IEC 60502 Type ST 7, IEC 60840 type ST3, IEC 60840 Type ST 7. |
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