What is the difference between PVC and XLPEThe structural elements of wire and cable products can be generally divided into four main structural components of wire, insulation, shielding, and sheathing. For power cables, according to different insulating materials, low-voltage power cables are mainly the following two kinds: PVC insulated power cables and XLPE insulated power cables.1, PVC insulated power cablesPVC plastic cheap, good physical and mechanical properties, the process is simple, but the insulation properties in general. Therefore, a large number of the manufacture of 1 kV and below low-voltage power cables for the low voltage distribution system.2, XLPE insulated power cablesXLPE insulated cable is a suitable cable and other areas of distribution networks. Its simple structure, light weight, good heat resistance, load capacity, not melting, chemical resistance, high mechanical strength.Difference between PVC and XLPEPVC is a vinyl chloride polymer. It is chemically stable, acid, alkali and some chemicals erosion. It is resistant to moisture, anti-aging, flame retardant. It can not be used when the temperature exceeds 60 ℃, will harden at low temperature. PVC divided soft plastic and rigid plastic. Mainly made of soft film, for packaging materials, rain supplies, agricultural filming seedlings, but also for cables, wire insulation, artificial leather products. Rigid pipes and plates are generally made, pipes are used for water pipes and for delivery of corrosion-resistant fluid pipes, and the plates are used as linings and floors for various tanks.XLPE is to improve the performance of PE is an important technology. After the cross-linked modified PE can be greatly improved its performance, not only significantly improve the mechanical properties of PE, environmental stress cracking resistance, the corrosion resistance of chemicals, creep resistance and electrical properties of comprehensive performance, and The temperature resistance of the PE is obviously improved. The heat-resistant temperature of PE can be raised from 70 ℃ to above 90 ℃, which greatly widens the application range of PE. Cross-linked polyethylene (XLPE) is widely used in pipe, film, cable materials and foam products.
What are the main raw materials of wire and cableWire and cable materialsFirst, polyvinyl chloride (PVC)1.PVC general electrical parametersVolume resistivity ρ = 1010 ~ 1012Ω. m, dielectric loss tangent tgδ (50 Hz) = 0.05 to 0.15 and dielectric constant ε = 4 to 8 (50 Hz).2.PVC for insulation and sheathing materials1) PVC as a wire and cable insulation with the performance: not easy to burn, anti-aging, oil, chemicals, impact resistance, easy to color; but because of the dielectric constant, generally only as a low voltage cable insulation materials and control cables insulation .2) PVC as a wire and cable sheath with the performance: good wear resistance, resistant to oil, acid, alkali, bacteria, moisture and sunlight, and the role of self-extinguishing flame; PVC Set of the minimum operating temperature of -40 degrees, high temperature up to 105 degrees.Second, polyethylene (PE)1. PE general physical properties: a white waxy, translucent, soft and tough, slightly elongation, lighter than water, non-toxic; Combustion characteristics: flammable, continue to burn after the fire, the flame is yellow at the top and the bottom was Blue, melted and drip when burning, and emits the smell of paraffin burning; polyethylene processing melting point range is 132 ~ 1350C, ignition temperature is: 3400C, auto-ignition temperature is: 3900C. Polyethylene has excellent electrical insulation properties and is widely used for the insulation of communication cables.2. General electrical parameters of polyethylene:Volume resistivity ρ> 1015Ω.m, melt index MI = 0.17 ~ 2.0, dielectric constant ε = 2.25 ~ 2.35 (50Hz).Third, ethylene - vinyl acetate copolymer (EVA)1. EVA is a class of rubber-like thermoplastic elastomer, its performance and the content of vinyl acetate (VA) has a great relationship: the smaller the VA the more like high-pressure polyethylene, while the more VA the more the more rubber. Low VA content EVA high-pressure polyethylene, soft and good impact strength, should be made of composite materials.2.EVA has good flexibility and low-temperature flexibility, chemical resistance, weather resistance.3. Copolymerization with LDPE can improve LDPE's environmental cracking resistance, impact resistance, hardness and adhesion between conductors and insulation.Fourth, polypropylene (PP)The specific gravity of polypropylene is 0.89-0.91, which is the smallest proportion of the commonly used plastics. The mechanical strength is excellent. The softening temperature is the highest in the thermoplastic resin, low temperature resistance,and aging resistance are good. Improvements can be made by adding stabilizers through copolymerization.The above introduces the main raw materials of wire and cable products, if you want to understand the specific products, please consult us!
Cable wires have become very important for us and without them we would end up having no power. These wires are used to carry electrical current to our homes, offices, industries etc... the most important use so far of these cable wires. These wires are installed in houses, buildings etc... taken underground to everywhere and anywhere where there is human population and electricity is needed. You might end up seeing a transmission line or electric cables running along road side to a far away village or district. These are known as power cables or high voltage cables. These large wires are produced just like a braid, but only after braiding together several different smaller wires. Later, cable ties are used to fasten them together.You can find a vast variety of electrical cables in the market such as Shielded, Twisted, Single, Multicore, Coaxial, Metallic and Non metallic etc... these cables can be divided into four main types namely:1. Multi Conductor2. Fiber Optics3. Twisted Pair4. Coaxial CableThe coaxial cable has two conductors with different signals while the cable wire containing a number of insulated conductors is known as Multi Conductor. Fiber Optic wire is used for many things including data transmission, networking etc while the twisted pair cable is designed for carrying signals.Fiber Optic cables are very well known for their capability and quality of data transfer and speed. It is proven that amongst all the cables, this cable has the minimum data loss and has speed compared to none. Thus the quality of Fiber Optics makes it an important tool to be used in medical fields in imaging tools and light guides. It is widely preferred by doctors.Another and the most well known use of these cables is in the field of information technology. It is used in networking, internet data transmission etc...You can search about the cables and their uses on the internet and find out which one suits your particular needs and demands.
The difference between a wire and a cable is that the size of the wire is generally small. The larger conductor cross-sectional area (larger than 6 mm2) is called a large wire and a cable, and the smaller (6 mm2 or less) is called a small wire. An insulated wire is Also known as cloth wire. However, cables are sometimes classified as cables in a broad sense.1, wireIs composed of one or more soft wires, clad in a light soft jacket, used to carry current conductive metal wire. Solid, stranded or foil woven and other forms. According to the insulation is divided into bare wires and insulated wire two broad categories.Bare wire does not contain any insulation or protective layer of wire. In addition to the transmission of electrical energy and information of the wire, but also can be used to manufacture motor ﹑ electrical components and cables. General copper, aluminum, copper alloy, aluminum and copper-clad steel, aluminum clad steel and other composite materials. Bare wire in addition to good electrical conductivity, but also have certain mechanical properties, such as tensile strength ﹑ elongation ﹑ bending torsion ﹑ creep ﹑ wear-resistant and so on.Insulated wires, according to the purpose is divided into magnet wire and universal insulated wire. The Universal insulated wire includes a variety of cable ﹑ installation line. Solenoid wire especially refers to the production of the coil or winding insulated wire.2, cableBy one or more mutually insulated conductive wire core placed in a sealed jacket formed the insulated wire. Additional protective coatings can be used to transmit, distribute or transmit electrical signals. It is different from ordinary wire cable size is larger, the structure is more complex. The cable consists of the following 4 parts.Conductors: Made of high conductivity material (copper or aluminum). According to laying conditions of use of the requirements of the degree of softness of the cable, each core may be a single wire or multiple strands twisted together.Insulation: Insulating materials used as cables should have high insulation resistance, high breakdown electric field strength, low dielectric loss and low dielectric constant. Insulation materials commonly used in cable oil impregnated paper polyethylene, polyethylene ﹑ rubber, and so on. Cables often classified as insulating materials, such as oil-impregnated paper insulated cables, PVC cables, XLPE cables.Sealed jacket: protects the insulated core from mechanical, moisture, moisture, chemicals, light and other damage. For moisture-sensitive insulation, lead or aluminum extrusion seal jackets are commonly used.Protective cover: to protect the sealing jacket from mechanical damage. General use of galvanized steel, steel wire or copper, copper, etc. as armor wrapped in the sheath (called armored cable), armor layer at the same time from the electric field shielding and prevent electromagnetic interference. In order to avoid the steel strip, the steel wire by the surrounding medium of corrosion, usually coated with asphalt or wrapped around their jute layer or extruded polyethylene, PVC sleeve.Cables can be divided into power cables, communication cables,and control cables according to their usage. Compared with overhead lines, the advantages of the cable insulation distance between lines is small, small footprint, ground laying and not occupy the space above the ground, free from environmental pollution, high reliability of power transmission, personal safety and the surrounding environment interference small. However, high cost, construction,and maintenance are more troublesome, manufacturing is also more complicated. As a result, cables are often used in densely populated areas and densely populated areas and at heavy traffic congestions; over-river, over-river,and sub-sea laying can avoid the use of large-span overhead lines. Cables may also be used wherever overhead line interference with communications and were aesthetic or avoidance of exposure is a concern.How to distinguish between wires and cables1, cables and wires are generally composed of the core wire, the insulation sheath and the protection of the skin composed of three components. The wire is made up of one or more flexible wires and covered with a light and soft jacket. The cable is made up of one or more insulated conductor wires, and the outside is covered with a tough outer layer of metal or rubber.2, the two do not have strict boundaries. Usually the number of cores is small, the product diameter is small, simple structure of the product called the wire, there is no insulation called the bare wire, the other known as the cable; conductor cross-sectional area larger (greater than 6 square mm) is called a large wire, Small (less than or equal to 6 square mm) is called a small wire, also known as insulated wire cloth wire.