What Kind of Good Insulation Paper Should Have the Performance?
Insulating paper has high tear strength, elongation is small, good insulation material, and therefore widely used in motors, cables, capacitors and transformers in the insulating material, but also laminated products, composite materials and prepreg materials and other insulating materials The are the main constituent materials.
In recent years, with the development of the power industry, modern power generation equipment and transmission equipment to high-pressure large-capacity development, along with the rapid development of world science and technology, research and development and production of a variety of high-performance synthetic fibers and applied to the paper industry, such as poly Polyester fiber paper, polyaroma fiber paper, polysulfone fiber paper, polyoxazole fiber paper, etc., successfully used in batteries, transformers, capacitors and other electrical equipment, especially the application of aramid insulating paper is the most common and successful.
Due to the special use of insulating paper, it is necessary to have some characteristics different from other regular types of paper, including mechanical properties, electrical properties and thermal stability.
Mechanical behavior of Insulation Paper
Insulation paper in the course of the use of a variety of external forces will be affected, such as high-pressure high-capacity generators used in insulating paper to withstand high-speed rotation, starting to stop and sudden short circuit caused by a large mechanical stress, requiring higher mechanical properties , Mainly including tensile strength and elongation at break.
Thermal stability of Insulation Paper
Thermal stability is an important indicator of insulating paper, is a major factor in the production of low-voltage insulation aging, to determine its service life. In normal operation, the electric field strength has only a slight effect on the insulation aging process. Insulating paper for a long time in the relatively high temperature environment, will be due to heat aging and brittle, and gradually lose its mechanical properties and electrical properties.
Electrical performance of Insulation Paper
Insulating paper is widely used in electrical equipment, so to meet a certain electrical performance. The electrical properties of insulating paper refer to the polarization, conductance, dielectric loss and breakdown characteristics that occur under the action of an electric field.
The performance of insulating paper is interrelated and can not be seen in isolation. In the selection and development of materials in the process, to a comprehensive balance of the advantages and disadvantages of various materials. In addition, to create a good electrical properties of the insulation paper, in the production process should try to avoid metal ions and other impurities and bubbles, the presence of water, and insulation paper to have a high uniformity.
In order to break the foreign monopoly of insulating paper technology, China’s scientific and technological workers after a long and unremitting efforts, has developed a number of good performance insulating paper, mainly in the following categories
In order to break the monopoly of foreign technology, China’s independent research and development to create a dedicated fiber manufacturing system, the use of unique precipitation technology to produce more suitable for wet paper sheet copy forming aramid fiber, the use of advanced spinning technology and fiber surface treatment Technology to create a more easily dispersed aramid chopped fiber, and in this raw materials based on the development of a unique fiber dispersion, paper-making and high-temperature calendering technology to create excellent performance of aramid insulation paper.
Aromatic sulfone, that is, polyphenylene sulfone terephthalamide fiber, for the para-aromatic fiber. China’s scientific and technological personnel in the development of aromatic sulfonamide when the creative introduction of the benzene structure and sulfone, so that the amide and sulfone groups connected to the phenyl and meta-phenyl form a linear macromolecule. Due to the presence of strong electron-withdrawing sulfone groups on the macromolecular chain, the double bond is conjugated through the benzene ring. At the same time, Fang Song Lun insulating paper has excellent flame resistance, mechanical properties, insulation properties and chemical stability.
Polyoxazole / Polyester Fiber Insulated Paper Polyoxazole / Polyester Fiber Insulating paper is made from poly (oxadiazole) paste and polyester fiber, which can be used alone or in combination with an electrical film. Electrical insulation, insulation, inter-turn insulation, interphase insulation and tank insulation.
Insulating paper plays an important role in the stable operation of electric power equipment. The future trend is to develop high-performance, environmentally friendly insulating paper, such as high-pressure, heat-resistant insulation, solvent-free, pollution-free insulation, composite insulation, water resistance, oil resistance, cryogenic insulation and energy saving. Therefore, New technology development, increase innovation, and actively accelerate the replacement of traditional electrical equipment insulation paper.
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