Product structure name and materials
(1) Wire: The most basic and indispensable main component for the product to transmit current or electromagnetic wave information.
Main materials: Wire is the abbreviation of conductive wire core. It is made of non-ferrous metals with excellent electrical conductivity such as copper, aluminum, copper-clad steel, copper-clad aluminum, etc., and optical fiber is used as the wire.
There are bare copper wires and tinned wires; single branch wires and twisted wires; twisted tinned wires.
(2) Insulation layer: It is a component that covers the periphery of the wire and plays an electrical insulation role.That is to say, it can ensure that the transmitted current, electromagnetic waves, and light waves only travel along the wire and do not flow outside. The potential on the conductor (that is, the potential difference formed on the surrounding objects, that is, the voltage) can be isolated. That is, it is necessary to ensure the normal transmission function of the wire and ensure the safety of external objects and people.Wires and insulation layers are the two basic components that must be included in cable products (except bare wires).
Main materials: PVC, PE, XLPE, polypropylene PP, fluoroplastic F, rubber, paper, mica tape
(3) Filling structure: Many wire and cable products are multi-core. After these insulated cores or pairs are cabled (or grouped into cables multiple times), firstly, the appearance is not round, and secondly, there is a large gap between the insulated cores. Therefore, a filling structure must be added during the cable formation. The filling structure is to make the outer diameter of the cable relatively round to facilitate wrapping and sheathing.
Main material: PP rope
(4) Shielding: It is a component that isolates the electromagnetic field in the cable product from the external electromagnetic field; some cable products also need to be isolated from each other between different wire pairs (or wire groups) within them.It can be said that the shielding layer is a kind of "electromagnetic isolation screen".The conductor shielding and insulation shielding of high-voltage cables are intended to equalize the distribution of the electric field.
Main materials: bare copper wire, copper-clad steel wire, tinned copper wire
(5) Sheath: When wire and cable products are installed and operated in various environments, they must have components that protect the entire product, especially the insulation layer, which is the sheath.
Because insulating materials are required to have excellent various electrical insulation properties, they must have extremely high purity and minimal impurity content; often they cannot take into account their ability to protect the outside world, so the ability to withstand or resist various mechanical forces from the outside world (i.e., installation, use occasions and use), resistance to atmospheric environments, resistance to chemicals or oils, prevention of biological intrusion, and reduction of fire hazards must be borne by various sheathing structures.