• Specifications and uses of commonly used insulation products

  Commonly used insulating products are insulating fiber products, impregnated fiber products and electrical laminates.

  (1) Insulation fiber products. Insulating fiber products refer to insulating materials such as insulating paper, cardboard, paper tubes, and various fiber fabrics. They are commonly made of plant fibers, alkali-free glass fiber paper, and synthetic fibers.

  ① Insulation paper: There are two types of insulation paper: vegetable fiber paper and synthetic fiber paper. It can be divided into cable paper, telephone paper, capacitor paper, and wound insulation paper according to the purpose.

  ② Insulating cardboard and paper tubes: Insulating cardboard can be used to make some insulating parts and serve as a protective layer. The hard steel cardboard has a tight structure and good machinability. It is suitable for small low-voltage motor slot wedges and other supporting insulating parts.

  The steel paper tube is made of zinc oxide-treated non-coated cotton fiber paper after being wound for rinsing. It has good mechanical processing performance and is suitable for the cores of fuses and arresters and circuit sleeves for motors.

  FRP composite steel paper tube is also called high voltage arc suppression tube, which can be used as arc suppression tube for 10 ～ 110kV fuses and arresters.

  ③ Insulating yarns, tapes, ropes, and tubes have good electrical properties and are used for insulation of glass fiber covered wires and installation wires; medium-alkali glass fiber yarns are used as braided protective layers for X-ray cables and certain wires and cables.

  Synthetic fiber with polyester fiber belt and polyester fiber and glass fiber interlaced belt is used for binding of motor coils. Synthetic fiber rope mainly refers to polyester wheel sheathed glass fiber rope. It has good heat resistance and high strength and can replace gaskets. The wax wire is bound for the end of the B-class motor coil.

  (2) Impregnated fiber products. The three types of varnished cloth, varnished tube and bandage impregnated with fiber products are all made of insulating fiber material and impregnated with insulating varnish. Varnished cloth is mainly used for insulation of motors, meters, appliances and transformer coils.

  Insulated paint tube is made of cotton, polyester, fiberglass tube impregnated with different insulation paints and dried, and is used as the insulation of the connecting wires of electrical equipment, electrical appliances and instruments and the outgoing wires.

  (3) Electrical laminates. Insulation electrical laminates are made of organic fibers and inorganic fibers as substrates, dip-coated with different adhesives, and laminated structure insulation materials by hot pressing or rolling, which can be made with excellent electrical, mechanical properties, Products resistant to oil, mildew, arc, and corona. Electrical laminates are divided into three types: laminates, laminated tubes and rods, and capacitor sleeve cores.

  (4) Rubber, plastic, insulation film and products for electrical purposes.

  ①Electrical rubber is mainly used for wire and cable insulation; electrical plastic is light, has good electrical properties, has sufficient hardness and mechanical strength, and is widely used in electrical equipment.

  ② Insulation film is made by polymerizing several kinds of high-molecular materials. It is mainly used for winding insulation of motors, electrical coils, wires and cables, and as a capacitor medium.

  ③ Polyester film insulation paper composite foil in insulating film composite products, with a thickness of 0.15 ~ 0.30mm, is composed of a layer of polyester film and a layer of insulation (blue shell paper), which is mainly used for insulation and ends of E-class motor slots. Interlayer insulation; polyester film glass varnished composite foil, thickness 0.17 ～ o.24mm, composed of a layer of polyester film and a layer of glass varnished cloth, used for B-level motor slot insulation, end-to-layer insulation and interturn insulation Insulation from pads.

  ④There are three types of tapes for electricians: film tape, fabric tape and substrateless tape. Among the film tapes, polyvinyl chloride tape is used for general wire joint wrapping insulation, and polyimide film tape is used for H-class motor coil insulation and slot insulation Substrate-free tape is suitable for high voltage motor coil insulation.

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