What are the types of insulation materials that are classified into electrical insulation?

Different polyester electrical tape correspond to different uses of the relative, respectively, play a different role, and like the role of electrical insulation material is in the electrical equipment to separate the different parts of the conductor, so that the current can flow in a predetermined direction.
If the insulation material in accordance with the physical state of different, can be divided into gas, liquid, solid three categories, including body insulation refers to the air, nitrogen, carbon dioxide, sulfur hexafluoride, etc .; and liquid phenolic laminated sheet is transformer oil, , Cable oil and other mineral oil and silicone oil, three atmosphere of benzene and other synthetic oil. In contrast, the classification of solid electrical insulation materials is more complex.
At present, there are many commonly used motor insulation materials, one is impregnated paint, it can be divided into two kinds of solvent and solvent-free, the former permeability is relatively good, long storage period, easy to use, but the impregnation and drying time is long, Curing slow; and the latter fast curing, viscosity changes rapidly with the temperature, and mobility, permeability, insulation integrity and so very good.
Similar to the motor compressed laminated wood is covered with paint, it can not only be used for dipping paint after the coil and insulation parts of the surface coating, can also be used for motor repair, to strengthen the local insulation capacity. The current application of epoxy lacquer is more extensive because of its moisture resistance, mildew resistance, dryness and strong paint film adhesion better.
In addition, dipped fiber products are also very common motor insulation materials, including the insulation paint cloth, insulated paint and tie belt three; with its corresponding non-impregnated fiber products, this motor insulation material with high heat resistance, water absorption is small, soft , High tensile strength, electrical performance and so on.
In addition, electricians often use thin films and composite products, sticky tape, insulation laminates as a motor insulation material, the same can play a very good insulation effect.

The use and characteristics of conventional insulating varnishes

insulation materials classification many, there are insulation board, insulated wire, as well as insulating paint, are some widely used insulating materials. Since the use of different, then the use of insulating paint varieties are different, what are the more commonly used types?
Most of the insulating paint is composed of paint base, solvent or thinner and auxiliary materials and other components, and can be divided into impregnated paint, enameled wire paint, covering paint, silicon steel paint, anti-corona paint and other varieties. Which impregnated insulating paint can also be divided into solvent paint and solvent-free paint two categories, mainly used in dipping motor, electrical coil and so on.
 Enameled wire insulation paint, of course, is a special enameled wire core coated insulating material, this insulating paint has a good coating, making the coating evenly, and the film adhesion, smooth and soft surface toughness; In addition, but also have a certain Wear resistance and elasticity, electrical performance, heat resistance, solvent resistance, no corrosion on the conductor and other characteristics.
Covered with heat resistant tape paint is used to coat the impregnated coil and insulation components of the material, in its surface to form a uniform thickness of the insulation protection layer to prevent the equipment insulation by mechanical damage and the atmosphere, the erosion of chemicals, improve surface insulation strength.
In contrast, silicon steel insulation paint is mainly used for coating silicon steel sheet, in order to reduce the core of the eddy current loss, and enhance corrosion resistance. However, it should be noted that the silicon steel insulation coating after the need for high temperature drying, in order to play a good feature.
The remaining anti-corona insulating paint is a kind of insulating varnish and non-metallic conductor powder mixed with insulating material, mainly for high-voltage coil, in order to play a good use requirements, requiring such insulation paint surface resistivity and stability, Strong adhesion, good wear resistance, fast drying, storage and so on.

The types and characteristics of mica products as insulating materials

Various types of mica products have excellent high temperature insulation, so they are also insulating materials, and the kinds of products are also many, the production process and performance characteristics are so different, but also need to further distinguish. After mastering this knowledge, we have a deeper understanding of insulating materials.
One is a soft mica plate, it is a plate-like polyimide film tape, is bonded with adhesive sheet mica or adhesive with mica adhesive in single or double-sided reinforcement material, made by baking, the general Used in motor slot insulation and turn insulation. Under normal circumstances, the soft mica board area will not be less than 400 × 600mm ², and requires a neat edge, adhesive distribution even; do not allow impurities, stratification and other undesirable phenomena.
The other is mica plate, is a different hardness of the insulation material, but in any case, they have excellent high temperature insulation properties, but also in high temperature insulation materials, has a good price; at the same time there are excellent electrical insulation Performance and bending strength and processing performance.
There is also a mica pad, it is made of hard plate-like polyester electrical tape from the gasket, gasket, pad or other various special parts. When it is normal, this kind of insulating material has good mechanical strength and electrical performance, suitable for a variety of electrical appliances, welding machines, arrester, electric components such as gasket insulation.
There are also mica tubes and mica tapes, the former is a rigid tubular insulation material, mainly by the stripping mica or mica paper with the appropriate adhesive bonding in the single-sided reinforcement material on the roll; the latter is the ribbon of insulation material. In addition, the commutator mica board is a special insulation material, specifically for the working temperature of 130 ℃ DC motor commutator copper between the insulation design.

What are the differences and commonalities of insulating materials?

The same is paper products, but insulating paper and green paper paper is a big difference; and seemingly NMN Insulating material and NMN insulation materials are two different products, but in fact they have a lot in common. So sometimes can not only look or feel to judge, or to conduct in-depth analysis of the product in order to understand the relationship.
For example, insulating paper is actually a composite insulation material, is coated with polyester film F-class adhesive, one side of the adhesive polyester fiber made of non-woven; and green shell paper is only a common by the fluorine processing Into the paper products, so they show the characteristics are different.
Tested, the insulating paper has good mechanical strength, dielectric properties and high heat resistance, Y series motor stereotypes flexible composite materials, can be used as small and medium-sized motor slot insulation, inter-turn and interlayer insulation, Insulation and transformer insulation.

What kind of insulating material is formed by the way?

anti static plastic sheet covers the type is too much, which will not be good at conducting current material called insulator, the material resistivity is often very high. Of course, insulators can also be divided into many categories, such as solid insulators there are plastic, rubber, glass, ceramics, etc .; liquid insulator refers to the natural mineral oil, silicone oil, trichlorobenzene, etc .; there are like air, carbon dioxide, Sulfur hexafluoride and the like.
The insulator has an obvious characteristic, that is, when it is under certain external conditions, it will be broken down "and converted into conductors, and it is not absolutely broken before the insulator is not absolutely conductive objects, if A voltage is applied across the insulating material, and a weak current is also present.
As an insulating material, there are many molding methods, if the substrate material in accordance with the different needs of different ways to shape. For example, resin-based g10 fiberglass molding methods are hand-paste molding, injection molding, fiber winding molding, molding, pultrusion, RTM molding, hot-pressing tank molding, diaphragm molding, migration molding, reaction injection molding, Stamping and so on.
The metal-based fibre washers is only solid-phase molding method and liquid-phase molding method, the former is below the melting point of the substrate temperature, through the application of pressure to achieve molding, including diffusion welding, powder metallurgy, hot rolling, hot drawing, Pressure and explosive welding. The latter is the matrix is ​​melted and filled into the reinforcement material, the traditional casting, vacuum suction, vacuum back pressure casting, extrusion casting and casting, etc. are liquid phase molding.

What are the indicators that affect the insulator

1, the insulation resistance and resistivity resistance is the reciprocal of the conductance, the resistivity is the resistance per unit volume. The smaller the conductivity of the material, the greater the resistance, the reciprocal relationship between the two, for the insulation material, always want the resistivity as high as possible.
2, the relative dielectric constant and dielectric loss tangent insulation material uses two: the electrical network components of the mutual insulation and capacitor dielectric (energy storage). The former requires a relatively small relative dielectric constant, which requires a relatively large relative dielectric constant, and both require dielectric loss tangent, especially in high frequency and high pressure applications of insulating materials, in order to make dielectric loss is small, require the use of Dielectric loss tangent small insulation material.
3, breakdown voltage and electrical strength in a strong electric field under the destruction of insulating materials, loss of insulation into a conductive state, known as the breakdown. The breakdown voltage is called the breakdown voltage (dielectric strength). EPGC201 is under the conditions of the breakdown of the voltage and withstand the voltage between the two electrodes of the business, that is, the unit thickness of the breakdown voltage. For insulating materials, the general breakdown voltage, the value of electrical strength as high as possible.
4, the tensile strength is in the tensile test, the specimen to withstand the maximum tensile stress. It is the most widely used and most representative test of the mechanical properties of insulating materials.
 5, resistance to burning refers to the insulation material in contact with the flame to resist combustion or leave the flame to prevent the ability to continue burning. With the increasing use of insulating materials, its resistance to flammability is more important, people through various means to improve and improve the flame resistance of insulating materials. The higher the flame resistance, the better the safety.
6, resistance to arc In the specified test conditions, the acetate cloth tapes to withstand the role of the arc along its ability. Test the use of high-voltage alternating current, by high pressure generated between the two electrodes of the arc, so that the surface of the insulating material to form the conductive layer of the time required to determine the arc resistance of insulating materials. The greater the time value, the better the arc resistance.
7, the degree of sealing on the oil, water quality isolation is better.

What is the characteristics and use of insulating paper?

Are generally ordinary polyimide glass fiber, rarely insulated paper insulation paper is the general term for electrical insulation paper. Used as cables, coils and other electrical equipment, insulation materials. Usually include a variety of capacitor paper, cable paper, telephone paper, impregnated insulating paper, roll heat resistant tape, powder mica paper and so on. In addition to have good insulation properties and mechanical strength, but also have their own characteristics. For example, the capacitor paper and bamboo film is made of refined sulphate slurry; the surface of the powder mica paper is made of metal flash, which is made by calcining the mica sheet.