Classification of enameled wires 3.1 According to insulation materials 3.1.1 Acetal enameled wire 3.1.2 Polyurethane enameled wire 3.1.3 Polyurethane enameled wire 3.1.4 Modified polyester enameled wire 3.1.5 Polyesterimide enameled wire 3.1.6 Polyesterimide/ Polyamide-imide enameled wire 3.1.7 Polyimide enameled wire 3.2 According to the purpose of the enameled wire can be divided into: 3.2.1 General purpose enameled wire (ordinary wire) is mainly used for general motors, electrical appliances, instruments. Winding wires in transformers and other workplaces such as; polyester enameled wire, modified polyester enameled wire. 3.2.2 Heat-resistant enameled wire; it is mainly used for winding wires of motors, electrical appliances, instruments, transformers and other working occasions working in a temperature environment of 180°C and above. Such as polyester imide enameled wire, polyimide enameled wire, polyester É22; amine/polyamideimide composite enameled wire.
3.2.3 Special purpose enameled wire; refers to the enameled wire with certain quality characteristics, and the winding wire used in specific occasions, such as: polyurethane enameled wire (direct solderability), self-adhesive enameled wire 3.3 divided by conductor material: copper wire, Aluminum wire, alloy wire. 3.4 According to the shape of the material: round wire, flat wire, hollow wire. 3.5 Divided by insulation thickness: round wire: thin paint film-1 thick paint film-2 thick paint film-3 According to the adhesion method, it can be divided into alcohol wire--------wire that is self-adhesive under the action of alcohol (E.g. Lock). Hot air line --- self-adhesive wire under the action of heat (e.g. PEI). Dual-purpose line --- under the action of alcohol or heat Self-adhesive flat wire: ordinary paint film-1 thick paint film-2 characteristics and uses of commonly used enameled copper wire 1. Acetal enameled wire; thermal grade is i05 and 120, with good mechanical strength, Adhesiveness, resistance to transformer oil and refrigerant, but the product has poor moisture resistance, low thermal softening breakdown temperature, durability and weak performance of benzene-alcohol mixed solvents. At present, it is only used in oil-immersed transformers and oil-filled motor windings.
Enameled wire 2. Polyester and modified polyester enameled wire, ordinary polyester enameled wire, the thermal class is 130, after modification, the thermal class of the enameled wire is 155. The product has high mechanical strength, good elasticity, scratch resistance, adhesion, electrical properties and solvent resistance. It is currently the largest product in my country, accounting for about two-thirds: it is widely used in various motors, Electrical appliances, meters, telecommunications equipment and home appliances; the weakness of this product is poor thermal shock resistance and low moisture resistance. 3. Polyurethane enameled wire; thermal grades are 130, 155, 180, 200. The biggest feature is that it has direct solderability, good high frequency resistance, easy coloring, and good moisture resistance. It is widely used in electronic appliances, precision instruments, telecommunications, and meters. The weakness of this product is that the mechanical strength is slightly poor, and the heat resistance is not high. , And the flexibility and adhesion of the production of large-size wires are poor, so the specifications of this product are mostly small and medium-sized wires. 4. Polyesterimide/polyamide composite enameled wire, thermal class 180. This product has good thermal shock resistance, high softening and breakdown temperature, excellent mechanical strength, good solvent and refrigerant resistance, and its weakness is in closed conditions. It is easy to be hydrolyzed, and it is widely used in windings of motors, electrical appliances, meters, power tools, electric dry-type compressors, etc., which require high heat resistance.
5. Polyesterimide/polyamideimide composite layer enameled wire 糸 is currently a heat-resistant enameled wire widely used at home and abroad. Its thermal class is 200. This product has high heat resistance, and is also resistant to refrigerants and severe cold. Radiation resistance and other characteristics, high mechanical strength, stable electrical performance, good chemical resistance and refrigerant resistance, and strong overload capacity. It is widely used in refrigerator compressors, air-conditioning compressors, electric tools, explosion-proof motors and motors and electrical appliances used under conditions such as high temperature, high cold, radiation resistance, and overload. Changes in the price of copper enameled wire are still dependent on changes in the price of copper in the market, and the price of copper plays a decisive factor in the price change of copper enameled wire. The use of copper Copper not only has excellent electrical conductivity, but also has a high melting point (1083°C), good mechanical properties, corrosion resistance, reliable work, and long service life. It is the most widely used conductive material. Copper used in the power, electronic and electrical industries and other uses is usually refined to a purity of 99.98% or higher. The wire commonly used in households is a 14-gauge copper wire, the diameter of the copper conductor is 1.63 mm, and the cross-sectional area is 2.08 mm. The length of the No. 14 copper wire consumed by the United States every year can circle the earth's equator 3670 times, which is equivalent to the distance of 196 round trips to the moon or one trip to the sun.
Experts from the International Copper Professional Association suggest choosing a larger cross-section copper wire can not only increase the reliability of the distribution line and reduce the heating and voltage loss of the wire, but it is also extremely beneficial from an economic point of view. The survey results show that the increased cost of wire cross-sections can be compensated by the saved electricity bills within one to two years, and long-term benefits can be obtained in the future. Copper and transportation A small car usually consumes about 23 kilograms of copper, three-fifths of which are used in electrical systems, and two-fifths are used in other devices. More and more parts made of free-cutting brass are used in the automobile industry. The automobile industry in the United States alone consumes about 8 million pounds of this C36000 material every year. The average copper consumption of an agricultural transport tractor is about 29 kilograms, the average copper consumption of construction transportation vehicles is 30 kilograms, and the average copper consumption of electric shovel trucks can reach 63 kilograms. The world's largest electric shovel actually used 36.32 tons of copper. 2% of the weight of the Boeing 747-200 jetliner is copper (approximately 4,100 kg), and the copper wire used is 190 kilometers long.
A diesel locomotive needs 5 tons of copper. Electric traction metro locomotives and trams use 284 kg to 4 tons of copper, an average of 1044 kg. To build a tritium-powered nuclear submarine, each requires 91 tons of copper. The use of copper2017-06-0617:49:54 Copper is one of the earliest ancient metals discovered by mankind. Mankind began to use copper as early as three thousand years ago. Copper in nature is divided into natural copper, copper oxide ore and copper sulfide ore. The reserves of natural copper and copper oxide are small. At present, more than 80% of the world's copper is refined from copper sulfide ore. The copper content of this ore is extremely low, generally around 2-3%. Metallic copper, element symbol CU, atomic weight 63.54, specific gravity 8.92, melting point 1083Co. Pure copper is light rose or light red. Copper has many valuable physical and chemical properties, such as high thermal conductivity, strong chemical stability, high tensile strength, easy welding, and corrosion resistance, plasticity, and ductility. Pure copper can be drawn into very thin copper wires and made into very thin copper foil. It can form alloys with zinc, tin, lead, manganese, cobalt, nickel, aluminum, iron and other metals. The formed alloys are mainly divided into three categories: brass is a copper-zinc alloy, bronze is a copper-tin alloy, and cupronickel is a copper-cobalt-nickel alloy.
The sources of copper, the uses of copper, and the effects of copper on plants and the human body will be described in detail below. 1. The source of copper: chalcopyrite, chalcocite, cuprite and malachite are important copper mines in nature. After the sulfide ore is calcined, it is eutecticized with a small amount of silica and coke to obtain crude copper, which is reduced to blister copper, and finally electrolytically refined to obtain copper. A new method for extracting copper is under study, which is to smash the underground low-grade mines with atomic energy blasting, leaching in situ with dilute sulfuric acid, and then pumping the leaching solution to the surface to deposit copper on the iron filings. Second, the use of copper: copper is a red metal, but also a green metal. It is said to be a green metal mainly because it is durable, easy to remelt and re-smelt, so it is quite cheap to recycle. Copper is a non-ferrous metal closely related to human beings. It is widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields. It is second only to aluminum in the consumption of non-ferrous metal materials in my country. Copper is the most widely used and used in the electrical and electronic industries, accounting for more than half of the total consumption.
Used for various cables and wires, windings of motors, switches and printed circuit boards, etc. In the manufacture of machinery and transportation vehicles, it is used to manufacture industrial valves and fittings, meters, sliding bearings, molds, heat exchangers and pumps. It is widely used in the chemical industry to manufacture vacuum vessels, distillation pots, brewing pots, etc. Used in the defense industry to manufacture bullets, shells, gun parts, etc. In the construction industry, it is used as various pipes, pipe fittings, decorative devices, etc.