Cable wires have a wide range of applications, which has led to the development 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 pair wires 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 wire, aluminum wire, etc.
Copper and fiber optic cables, multi-purpose branch cables, can be divided into two basic types: reclaimed 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 main 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 feature an air-core inside with a flame-retardant jacket. Such cables can be used in environments with harmful gases. Outdoor cables are commonly used between buildings, meeting specific environmental requirements of installation sites. 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 cables suspended on overhead poles between buildings.
Basic performance of recycled cable 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 during the process of propagation along the line, the conversion of electromagnetic field energy is achieved.
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废旧电线电缆回收recycling projects 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, etc.
(3) Thermal properties include the product's heat resistance grade, operating temperature, the heat generation and dissipation 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 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) Weatherability refers to the ability of recycled wire and cable products and their constituent materials to maintain their original properties (sunlight resistance, cold resistance, anti-mold, and moisture resistance) under the influence of mechanical (should) stress, electrical stress, thermal stress, and other external factors, as well as under varying 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 certain special uses of the product (such as flame retardancy, resistance to atomic radiation, insect resistance, transmission, and energy damping).
