Classification and performance of insulating materials

Many types of insulating materials, can be divided into gas, liquid, solid three categories. Commonly used gas insulation materials are air, nitrogen, sulfur hexafluoride insulation PC film. Liquid insulation materials are mainly mineral insulating oil, synthetic insulating oil (silicone oil, dodecyl benzene, polyisobutylene, isopropyl biphenyl, diaryl ethane, etc.) two categories. Solid insulation materials can be divided into organic, inorganic two categories. Organic solid insulation materials include insulating varnishes, insulating glue, insulating paper, insulating fiber products, plastic, rubber, lacquered lacquers and insulating impregnated fiber products, electrical thin films, composite products and adhesive tape, electrical laminates and so on. Inorganic solid insulation materials are mainly mica, glass, ceramics and their products. In contrast, solid insulation material variety, but also the most important.
Different electrical equipment requirements for the performance of insulating materials are focused. High-voltage electrical equipment such as high-voltage motors, high-voltage cables and other insulation materials require high breakdown strength and low dielectric loss. Low-voltage electrical appliances with mechanical strength, elongation at break, heat-resistant grade as the main requirements.
The macroscopic properties of compressed laminated wood such as electrical properties, thermal properties, mechanical properties, chemical resistance, weather resistance, corrosion resistance and other properties are closely related to its chemical composition and molecular structure. Inorganic solid insulation material is mainly composed of silicon, boron and a variety of metal oxides, mainly to the ionic structure, the main features of high heat resistance, the working temperature is generally greater than 180 ℃, good stability, resistance to atmospheric aging, Chemical properties and long-term under the action of the electric field aging performance; but high brittleness, low impact strength, high pressure and low tensile strength; poor process. Organic materials are generally polymers with an average molecular weight between 104 and 106, and their heat resistance is usually lower than that of inorganic materials. Contains aromatic rings, heterocycles and silicon, titanium, fluorine and other elements of the material heat resistance is higher than the general line of chain polymer materials.
An important factor affecting the dielectric properties of insulating materials is the strength of the polar and the content of polar components. The dielectric constant and dielectric loss of the polar materials are higher than those of the non-polar materials, and the impurity ions are easily adsorbed to increase the conductivity and reduce the dielectric properties. Therefore, in the insulation material manufacturing process should pay attention to clean, to prevent pollution. Capacitor dielectrics require high dielectric constants to increase their specificity.

What are the characteristics of insulating paper?

1, most of the bakelite sheet suppliers due to the use of physical properties, temperature, humidity, chemical resistance and other different types of different, insulating paper is one of them;
2, insulation paper can be based on the thickness of the insulation using different models, the staff can be adjusted according to the actual needs of the length;
3, insulated paper tape in the original insulation paper under the premise of its cutting into a variety of width, can effectively control costs, save time to improve efficiency and reduce a lot of trouble;
4, insulation paper tape also because our company clean and tidy environment, can effectively guarantee his insulation medium, ash loss and other aspects of performance.

The role and use of insulating materials

polyimide glass fiber is able to prevent the current through the material, the DC current has a very large resistance, under the action of DC voltage, in addition to a very small surface leakage current, in fact, almost non-conductive, and for the AC current capacitance The current passes, but is also considered to be nonconductive. Antistatic products are made of insulating material.
The greater the resistivity of the insulating material, the better the insulation performance. Insulation materials are essential in electrical products, the proportion of electrical equipment is very large. In general, electrical and electrical equipment are made of conductive materials, magnetic materials, insulating materials and structural materials. In addition to insulating materials, the other is metal materials. Motor, electrical appliances in operation, inevitably subject to temperature, electricity, mechanical stress and vibration, harmful gases, chemicals, moisture, dust and radiation and other factors. These factors have a more pronounced effect on insulating materials than other materials. It can be said that the insulation material is more sensitive to these factors, easy to deteriorate deterioration, resulting in damage to electrical equipment. So the insulation material is to determine the motor, electrical operation of the key material reliability.
Insulation material is one of the key factors to determine the technical and economic indicators of motor and electrical appliances. One of the important technical and economic indicators of the motor is the mass power ratio, that is, the kg / kw value. Reduce the ratio, the motor has important significance. From the electrical, electrical products, the cost of the situation, the cost of insulating materials in about half of these are the insulating materials in the electrical, electrical industry, the status and role.

Phenolic Resin

This insulating material is also called bakelite, also known as bakelite powder, solid phenolic resin is colorless or tan transparent.
Phenolic resin insulation material is the earliest industrial synthetic resin, the market is red, yellow, black, green, brown, blue and other colors, there are particles, powder is added with coloring agent. Resistant weak acid and weak base, in case of strong acid decomposition, the case of strong alkali corrosion. Do not dissolve in water, soluble in acetone, alcohol and other organic solvents. Phenol and formaldehyde derived from condensation. It includes: novolac resins, thermosetting phenolic resins and oil-soluble phenolic resins.
bakelite electrical insulation board are mainly used for the production of compression molding powder, laminated plastic; manufacturing varnish or insulation, corrosion-resistant coatings; manufacturing daily necessities, decorations; manufacturing noise, insulation materials. It has an important feature is high temperature resistance, even at very high temperatures, but also to maintain its structural integrity and size stability. For this reason, phenolic resins are used in some high temperature areas, such as refractory materials, friction materials, adhesives and foundry industries.

g10 fiberglass tube is made of electrician non-alkali glass fiber cloth impregnated with epoxy resin, baked, forming mold after hot-pressing the cross-section was made of round bar of the glass rod with high mechanical properties. Dielectric properties and good machinability. Applicable to electrical equipment for insulation structural parts, and can be used in humid environment and transformer oil.
The appearance of the epoxy tube: the surface should be smooth and smooth, no bubbles, oil and impurities, allowing the use of non-hinder the use of uneven color, abrasions, slight high and low inequality, wall thickness of more than 3mm epoxy tube to allow end or cross- Use the crack.

Polyimide film coated F46 composite film has excellent resistance to high and low temperature, laminated mica sheet, adhesion, radiation resistance, resistance to media, can be as low as -269 ℃ up to +400 ℃ temperature range use. Composite film also has the characteristics of high temperature self-adhesive seal. They can be used as high temperature flexible printed circuit substrate, flat circuit, wire and cable, wire insulation layer and used for a variety of motor insulation. Has been widely used in aircraft, spacecraft, nuclear industry, nuclear submarines, electric locomotives, audio devices, instrumentation, petrochemical and other departments.