Wire and Cable Knowledge (3)
In a sense, the wire and cable
manufacturing industry is a material finishing and assembly industry. One is that the amount of materials is huge, and the cost of materials in wire and cable products accounts for 80-90% of the total manufacturing cost; the second is that the materials used are of many types and varieties, and the performance requirements are particularly high. For example, copper for conductors requires the purity of copper. Above 99.95%, some products use oxygen-free high-purity copper; Third, the choice of materials will have a decisive influence on the manufacturing process, product performance and service life.
At the same time, the benefits of wire and cable manufacturing companies are also closely related to the scientific use of materials in the selection, processing, and production management of materials.
Therefore, in the design of wire and cable
products must be selected at the same time with the choice of materials, generally selected several materials, determined by the process and performance screening tests.
The materials for cable products can be classified into conductive materials, insulating materials, filler materials, shielding materials, and sheath materials according to their use locations and functions. However, some of these materials are common to several structures. In particular, thermoplastic materials such as polyvinyl chloride, polyethylene, etc. can be used as insulating or sheathing only by changing some of the formulation ingredients.
The types of materials used in the manufacture of cable products are very extensive, and the specifications (types) are particularly large.