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What types of insulation materials are available?Release time: 2014-07-31 15:27:40
Insulating materials are solids used to isolate different electrical conductors. In general, solid insulating materials are also required to have a supporting effect. Due to the high density of solid insulating materials, the breakdown strength is also much higher. The insulation resistance, dielectric constant and sum of solid insulating materials vary widely.
Solid insulation materials can be divided into two categories, inorganic and organic.
Inorganic solid insulation materials: mainly powder mica and mica products, glass, glass fiber and its products, and electric porcelain, alumina film, etc. They are resistant to high temperatures, not easy to age, and have considerable mechanical strength. Some of these materials, such as low cost, occupy a certain position in applications.
Glass is simpler than ceramic and can be used to make it. Glass fiber can be made into silk, cloth, and tape. It has much higher heat resistance than organic fiber, and plays an important role in the development of high-temperature insulation structures.
Organic solid insulation materials: In the 19th century, mainly natural materials such as paper, cotton, silk, and curable vegetable oils were used. These materials are flexible, can meet the requirements of the application process, and are easy to obtain.
Silicone resin combined with low-alkali glass cloth has greatly improved the heat resistance. Polyvinyl formal is an enameled wire made of enamel, which opens up a broad prospect for enameled wires, replacing silk and gauze wires. The thickness of the polyester film is only tens of micrometers. Using it to replace the original paper and cloth has greatly improved the technical and economic indicators of motors and electrical appliances. Polyamide fiber paper is used in combination with polyester film and polyimide film to make the motor tank insulation heat resistance grades F and H respectively. Elastomer materials have similar developments, such as heat-resistant silicone rubber, oil-resistant nitrile rubber, and subsequent fluorine rubber, ethylene-propylene rubber, and so on.
The above is what kind of knowledge about insulation materials that Xiaobian will introduce to you. If you have any questions, please contact us.