Analysis of Insulating Paper Materials for Electrical Applications
An insulating material that blocks the flow of electrical current. Its electrical resistivity is very high, usually in the range of 10 to 10 Ω·m. Insulation crepe paper is mainly used for electric motors and electrical appliances, such as insulation of armature wedges, stator windings and rotor windings in generators and motors.
① insulating paint, adhesives, and resin based liquid. For example, insulating impregnating varnish, silicon steel sheet lacquer, enameled wire lacquer, potting resin liquid and various adhesives are commonly used epoxy resin, polyester, polyurethane, silicone resin, polyimide alkyd resin (see alkyd resin coating) )Wait.
② impregnated fiber-based products. Such as insulating cloth, tape and other products obtained by impregnating various types of cotton, silk, synthetic fiber and glass fiber or fabric with resin.
③ laminate type. A laminate of various organic or inorganic substrates impregnated with a resin, such as a variety of laminates.
④ plastic products category. It is made by adding various organic or inorganic fillers to the resin, such as TV case, instrument, instrument case, electrical switch connector housing and so on.
⑤ film, synthetic paper, and composite article class. For example, various polymer film capacitor dielectric materials, commonly used are polystyrene, polypropylene, polyester, polycarbonate, polytetrafluoroethylene, polyimide and other films; various synthetic fiber insulation paper, such as aromatic poly Amide fiber paper, polyester fiber paper; various insulating adhesive tapes, insulating tapes, etc.
⑥ rubber products category. For example, various wire and cable insulation layers and sheaths, heat shrinkable tubes, silicone rubber insulated terminals, and the like.
The flammability of an insulating material refers to the ability of an insulating material to resist combustion when it contacts a flame or when it leaves the flame. As the application of insulating materials is expanding, the requirements for its resistance to combustion are more important, and various methods are used to improve and improve the flame resistance of insulating materials. The higher the resistance to combustion, the better its safety.