Insulation Paper Has A High Tear Strength, Elongation Is Small, Good Insulation

- Aug 08, 2017 -

Insulation paper, literally simple understanding is a kind of insulation can be insulated paper, mainly used in cable, coil and other electrical equipment, an insulating paper materials. Insulation paper, as the name implies, it must have a super insulation, in fact, in addition to insulation, but also has a high mechanical strength and other characteristics, today we give you a detailed description of several types of insulating paper.

Insulation paper type so much, the material naturally different. There are cellulose paper (also called telephone paper, barley paper) is made of wood pulp, straw pulp; made of synthetic fiber, such as Nomex (R) paper is made of polyamide fiber; DMD, is a polyester Non-woven and polyester film composite do.

Insulation paper type so much, the material naturally different. There are cellulose paper (also called telephone paper, barley paper) is made of wood pulp, straw pulp; made of synthetic fiber, such as Nomex (R) paper is made of polyamide fiber; DMD, is a polyester Non-woven and polyester film composite do.

Insulating paper is usually made of plant fibers, mineral fibers, synthetic fibers or mixtures thereof, and thin fibers are deposited on papermaking machines by means of water or other media. Insulating paper has high tear strength, elongation is small, good insulation, 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 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 types of paper, including mechanical properties, electrical properties and thermal stability.

Mechanical behavior:

Insulation paper in the course of the use of a variety of external forces will be affected, such as high-voltage high-capacity generators used in insulating paper to withstand high-speed rotation, start-up and sudden short circuit caused by a large mechanical stress, requiring higher mechanical properties , Mainly including tensile strength and elongation at break.

Thermal stability:

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:

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 produce 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.


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