Properties that high-quality insulating paper should have

In recent years, with the development of the power industry, modern power generation equipment and transmission equipment have developed towards high voltage and large capacity. With the rapid development of science and technology in the world, a variety of high-performance synthetic fibers have been developed and produced and used in the paper industry, such as polyester fiber. Ester fiber paper, polyaramid fiber paper, polysulfone fiber paper, polyoxadiazole fiber paper, etc., have been successfully used in electrical equipment such as batteries, transformers, capacitors, etc., especially Yaan insulating paper, which is the most common and successful application.

Due to the special use of insulating paper, it must have some characteristics that are different from other paper types, including mechanical properties, electrical properties and thermal stability.

Mechanical behavior

Insulating paper will be affected by various external forces during use. For example, the insulating paper used in high-voltage and large-capacity generators must be able to withstand the great mechanical stress caused by high-speed rotation, starting and stopping, and sudden short circuits, so it is required to have high mechanical properties. , mainly including tensile strength and elongation at break.

Thermal stability

Thermal stability is a very important indicator of insulating paper. It is a major factor in the aging of low-voltage insulation and determines its service life. Under normal operating conditions, the electric field intensity has only a slight influence on the insulation aging process. When insulating paper is used in a relatively high temperature environment for a long time, it will become brittle due to thermal aging and gradually lose its mechanical and electrical properties.

Electrical properties

Insulating paper is widely used in electrical equipment, so it needs to meet certain electrical properties. The electrical properties of insulating paper refer to its mechanization, conductivity, dielectric loss and breakdown characteristics under the action of an electric field.

The various properties of insulating paper are interrelated and cannot be viewed in isolation. In the process of selecting and developing materials, the advantages and disadvantages of various materials must be comprehensively balanced. In addition, in order to produce insulating paper with good electrical properties, the presence of impurities such as metal ions, bubbles, and moisture must be avoided during the production process, and the insulating paper must have high uniformity.

Insulation paper plays an important role in the stable operation of power and electrical equipment. The future trend is to develop high-performance and environmentally friendly insulating papers such as high-voltage resistant, heat-resistant insulation, solvent-free, pollution-free insulation, composite insulation, water-resistant, oil-resistant, cryogenic insulation and energy-saving. Therefore, we must vigorously strengthen new materials and The development of new processes increases innovation and actively accelerates the upgrading of traditional electrical equipment insulation paper.