Cable wires have a wide range of applications, which has led to the growth of the cable recycling industry. Their uses are categorized into two types: optical cables and copper cables. Copper cables primarily use 100 ohm unshielded twisted pairs and 100 ohm coaxial cables. Optical cables mainly utilize 62.5/125um multimode fibers and 10/125um single-mode fibers. That is, as commonly said, copper wires, aluminum wires, and so on.
Copper and fiber optic cables, multi-purpose branch cables, can be divided into two basic types: reclaimed waste wire and cable, and outdoor and indoor cables. These cables differ in both performance and construction. Copper and fiber optic cables can also be categorized into two fundamental types: outdoor cables (including six types of FTP shielded cables) and indoor cables. These cables vary in function and construction. Cables designed for indoor use have an air-core inside with a flame-retardant jacket on the outside. Such cables can also be used in environments with harmful gases. Outdoor cables are commonly used between buildings, meeting specific environmental requirements of the installation site. Common installation methods include underground cables (installed in pipes), cables laid in underground tunnels and holes, which may contain hollow or solid cables with a protective sheath, directly buried cables laid in trenches without pipe protection, and overhead cables supported by poles between buildings.
Basic performance of waste cable recovery grounding wire is to effectively propagate electromagnetic waves (field) according to electromagnetic field theory: The grounding wire is a transmission line for guiding and broadcasting, where electromagnetic waves propagate in a specified direction and achieve the conversion of electromagnetic field energy during the propagation process along the line.
Generally, its basic performance is summarized into six key points:
(1) Electrical Performance Guidelines cover electrical properties, electrical insulation properties, and transmission properties. Electrical insulation properties generally refer to cable products, with the main recycling projects for waste cables being insulation resistance, dielectric constant, dielectric loss, and voltage withstand characteristics. Transmission properties mainly refer to high-frequency transmission characteristics and anti-interference properties.
(2) Mechanical properties include tensile strength, elongation, flexibility, elasticity, softness, vibration resistance, wear resistance, and impact resistance, among others.
(3) Thermal properties include the product's heat resistance grade, operating temperature, the heat and cooling characteristics of power cables, current carrying capacity, short-circuit and overload capabilities, the thermal deformation and heat shock resistance of synthetic materials, the thermal expansion properties of materials, and the drip performance of impregnated or coated materials.
(4) Corrosion resistance includes resistance to electrochemical corrosion, biological and bacterial侵蚀, chemical agents (oils, acids, alkalis, chemical solvents, etc.) erosion, and salt spray performance.
(5) Weather resistance refers to the ability of recycled wire and cable products and their constituent materials to maintain their original properties (sunlight resistance, cold resistance, mold prevention, and moisture resistance) under the influence of mechanical (should) stress, electrical stress, thermal stress, and various other external factors, as well as under external climatic conditions.
(6) Other performance refers to the physical properties of certain materials (such as the hardness and creep of metallic materials, and the compatibility of polymer materials) as well as specific usage characteristics of the products (such as flame retardancy, resistance to atomic radiation, pest resistance, transmission, and energy damping).
