What are the structural components of wire and cable products?
The structural elements of wire and cable
products can be divided into four major structural components of wire, insulation, shielding, and sheath as well as filling elements and tensile elements. Wires and insulation are the two basic components that must be available to make a cable product (except for bare wires).
The wire is the product of the current or electromagnetic wave information transmission function of the most basic essential components. The wire is the abbreviation of the conductive core, with copper, aluminum, and other non-ferrous metals with excellent conductivity.
Is coated in the periphery of the wire around the electrical insulation member. That is to ensure the transmission of current or electromagnetic waves, light waves only along the wire without flowing outward, the conductor has a potential (that is, the potential difference formed between the surrounding objects, that is, the voltage) can be isolated, that is both to ensure the normal transmission wire Function, but also to ensure the safety of objects and personal objects.
3, The protective layer
When the wire and cable products installed in a variety of different environments, you must have the product as a whole, especially to protect the insulating layer of the component, which is the sheath. For the outside world (that is, installation, use and use of a variety of mechanical resistance or resistance, resistance to the atmosphere, chemicals or oils, the prevention of biological damage, as well as reduce the hazards of fire, etc. must be Cover the structure to bear.
Many cable products designed for use in a good external environment (such as clean, dry, room free of mechanical external forces), or the insulation material itself has a certain mechanical strength, weatherability of the product, you can not have the sheath of this component.
Is a kind of cable products in the electromagnetic field with the external electromagnetic field isolation components; by the cable products within its different pairs (or line group) also need to be isolated from each other.
5, filling structure
Many wire and cable products are multi-core, such as the majority of low-voltage power cables are four-core, five-core cable, the insulated core or wire into a cable, one is not round shape, and second, there is a very insulated wire core ,Therefore, it is necessary to add a filling structure when the cable is filled. The filling structure is to make the outer diameter of the cable relatively round so as to facilitate the wrapping and sheathing. In addition, in order to stabilize the cable structure and the internal stones, Without damaging the internal structure of the cable. Therefore, although the filling structure is an auxiliary structure, it is also necessary, and its material selection and shape design also have detailed provisions.
6, tensile components
Traditional wire and cable
products are the use of armor layer to withstand external tension or weight caused by the tension. The typical structure is strip armor and wire armor. In order to protect the optical fiber from the small tensile force, the optical fiber optical cable is provided with a primary and secondary coating and a special tensile force element in the optical fiber cable structure. In addition, such as cell phone headset with thin copper wire or thin copper wire wrapped around the synthetic fiber insulation structure of the outer layer, which is a synthetic fiber yarn tensile components. In short, in recent years developed a special small, soft, while requiring multiple bends, twisted use of products, the tensile element plays a major role.