Most of the indoor sheathed optical cables are single-core and double-core structures, and the reinforcement is located in the center of the two circles. There are metal or non-metal structures, and qualified sheathed optical cables need to pass the mechanical performance test, so the following Shengwei editor will talk about these two performance tests.
Indoor leather fiber optic cable
The mechanical property test is mainly to check the tensile strength and elongation at break of the insulating and sheathing plastics, including the properties before and after aging, as well as the bending test, the bending test, the load breaking core test, the insulating core tearing test, and the static test. Bending test of finished flexible cables, etc.
The thermal weight loss test is to detect the degradation and volatilization of the material after 7 days and high temperature aging at 80°C; the thermal shock test is to check whether there are cracks on the specially wound insulation surface after 1 hour at a high temperature of 150°C; the high temperature pressure test is Detect the elastic retention of insulating materials after high temperature re-cooling; all low temperature tests usually refer to the change of mechanical properties at -15 °C, they are all detection wires, whether the cable material is fragile, easy to break or easy to be broken in low temperature environment fracture.
The flame-retardant properties of indoor sheathed fiber optic cables mean that finished cables installed as standard will be ignited by special flames within a specific period of time. After the flame goes out on its own, check the condition of the cables. Of course, the fewer parts that burn, the better. This means that the cables are flammable and have poor flame retardancy and safety.
Cable aging refers to the ability of insulation and sheathing materials to retain their original properties under high temperature conditions. If the tensile strength and elongation at break are not acceptable, the jacket or insulator will easily break during the construction and installation of the cable, or the cable jacket and insulator used in a light-thermal environment will become brittle and prone to fracture. In addition, since the flexible cable is not fixedly laid, there are repeated dragging and bending in use, so for the flexible cable standard, dynamic bending test, bending test, load rupture core test, insulation core tearing test, static test are carried out. Bend tests are performed on the finished cable to ensure that the cable can meet the actual use requirements.
Application Scenarios of Indoor Fiber Optic Cables
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